Merge pull request #7 from eugenp/master

Updated

apache-avro/src/main/java/com/baeldung/avro/util/serealization/AvroDeSerealizer.java

@@ -5,29 +5,37 @@ import org.apache.avro.io.DatumReader;
 import org.apache.avro.io.Decoder;
 import org.apache.avro.io.DecoderFactory;
 import org.apache.avro.specific.SpecificDatumReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 
 public class AvroDeSerealizer {
 
+    private static Logger logger = LoggerFactory.getLogger(AvroDeSerealizer.class);
+
     public AvroHttpRequest deSerealizeAvroHttpRequestJSON(byte[] data) {
         DatumReader<AvroHttpRequest> reader = new SpecificDatumReader<>(AvroHttpRequest.class);
         Decoder decoder = null;
         try {
-        decoder = DecoderFactory.get().jsonDecoder(AvroHttpRequest.getClassSchema(), new String(data));
+            decoder = DecoderFactory.get()
+                .jsonDecoder(AvroHttpRequest.getClassSchema(), new String(data));
             return reader.read(null, decoder);
         } catch (IOException e) {
-        return null;
+            logger.error("Deserialization error" + e.getMessage());
         }
+        return null;
     }
 
     public AvroHttpRequest deSerealizeAvroHttpRequestBinary(byte[] data) {
         DatumReader<AvroHttpRequest> employeeReader = new SpecificDatumReader<>(AvroHttpRequest.class);
-    Decoder decoder = DecoderFactory.get().binaryDecoder(data, null);
+        Decoder decoder = DecoderFactory.get()
+            .binaryDecoder(data, null);
         try {
             return employeeReader.read(null, decoder);
         } catch (IOException e) {
+            logger.error("Deserialization error" + e.getMessage());
+        }
         return null;
     }
 }
-}

apache-avro/src/main/java/com/baeldung/avro/util/serealization/AvroSerealizer.java

@@ -3,24 +3,29 @@ package com.baeldung.avro.util.serealization;
 import com.baeldung.avro.util.model.AvroHttpRequest;
 import org.apache.avro.io.*;
 import org.apache.avro.specific.SpecificDatumWriter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
 public class AvroSerealizer {
 
+    private static final Logger logger = LoggerFactory.getLogger(AvroSerealizer.class);
+
     public byte[] serealizeAvroHttpRequestJSON(AvroHttpRequest request) {
         DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
         byte[] data = new byte[0];
         ByteArrayOutputStream stream = new ByteArrayOutputStream();
         Encoder jsonEncoder = null;
         try {
-        jsonEncoder = EncoderFactory.get().jsonEncoder(AvroHttpRequest.getClassSchema(), stream);
+            jsonEncoder = EncoderFactory.get()
+                .jsonEncoder(AvroHttpRequest.getClassSchema(), stream);
             writer.write(request, jsonEncoder);
             jsonEncoder.flush();
             data = stream.toByteArray();
         } catch (IOException e) {
-        data =null;
+            logger.error("Serialization error " + e.getMessage());
         }
         return data;
     }
@@ -29,13 +34,14 @@ public byte[] serealizeAvroHttpRequestBinary(AvroHttpRequest request){
         DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
         byte[] data = new byte[0];
         ByteArrayOutputStream stream = new ByteArrayOutputStream();
-    Encoder jsonEncoder = EncoderFactory.get().binaryEncoder(stream,null);
+        Encoder jsonEncoder = EncoderFactory.get()
+            .binaryEncoder(stream, null);
         try {
             writer.write(request, jsonEncoder);
             jsonEncoder.flush();
             data = stream.toByteArray();
         } catch (IOException e) {
-        data = null;
+            logger.error("Serialization error " + e.getMessage());
         }
 
         return data;

apache-avro/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerTest.java

@@ -24,8 +24,10 @@ public class AvroSerealizerDeSerealizerTest {
         serealizer = new AvroSerealizer();
         deSerealizer = new AvroDeSerealizer();
 
-        ClientIdentifier clientIdentifier = ClientIdentifier.newBuilder().
-                setHostName("localhost").setIpAddress("255.255.255.0").build();
+        ClientIdentifier clientIdentifier = ClientIdentifier.newBuilder()
+            .setHostName("localhost")
+            .setIpAddress("255.255.255.0")
+            .build();
 
         List<CharSequence> employees = new ArrayList();
         employees.add("James");
@@ -33,9 +35,12 @@ public class AvroSerealizerDeSerealizerTest {
         employees.add("David");
         employees.add("Han");
 
-        request = AvroHttpRequest.newBuilder().setRequestTime(01l)
-                .setActive(Active.YES).setClientIdentifier(clientIdentifier)
-                .setEmployeeNames(employees).build();
+        request = AvroHttpRequest.newBuilder()
+            .setRequestTime(01l)
+            .setActive(Active.YES)
+            .setClientIdentifier(clientIdentifier)
+            .setEmployeeNames(employees)
+            .build();
     }
 
     @After
@@ -43,33 +48,36 @@ public class AvroSerealizerDeSerealizerTest {
     }
 
     @Test
-public void WhenSerialized_UsingJSONEncoder_ObjectGetsSerialized(){
+    public void WhenSerializedUsingJSONEncoder_thenObjectGetsSerialized() {
         byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
         assertTrue(Objects.nonNull(data));
         assertTrue(data.length > 0);
     }
 
     @Test
-public void WhenSerialized_UsingBinaryEncoder_ObjectGetsSerialized(){
+    public void WhenSerializedUsingBinaryEncoder_thenObjectGetsSerialized() {
         byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
         assertTrue(Objects.nonNull(data));
         assertTrue(data.length > 0);
     }
 
     @Test
-public void WhenDeserialize_UsingJSONDecoder_ActualAndExpectedObjectsAreEqual(){
+    public void WhenDeserializeUsingJSONDecoder_thenActualAndExpectedObjectsAreEqual() {
         byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
         AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestJSON(data);
         assertEquals(actualRequest, request);
-    assertTrue(actualRequest.getRequestTime().equals(request.getRequestTime()));
+        assertTrue(actualRequest.getRequestTime()
+            .equals(request.getRequestTime()));
     }
 
     @Test
-public void WhenDeserialize_UsingBinaryecoder_ActualAndExpectedObjectsAreEqual(){
+    public void WhenDeserializeUsingBinaryecoder_thenActualAndExpectedObjectsAreEqual() {
         byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
         AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestBinary(data);
         assertEquals(actualRequest, request);
-    assertTrue(actualRequest.getRequestTime().equals(request.getRequestTime()));
-}
+        assertTrue(actualRequest.getRequestTime()
+            .equals(request.getRequestTime()));
+    }
+    
 }
 

apache-cxf/pom.xml

@@ -17,6 +17,7 @@
         <module>cxf-spring</module>
         <module>cxf-jaxrs-implementation</module>
         <module>cxf-aegis</module>
+        <module>sse-jaxrs</module>
     </modules>
 
     <build>

apache-cxf/sse-jaxrs/pom.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>sse-jaxrs</artifactId>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>apache-cxf</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <modules>
+        <module>sse-jaxrs-server</module>
+        <module>sse-jaxrs-client</module>
+   </modules>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-client/pom.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>sse-jaxrs</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>sse-jaxrs-client</artifactId>
+
+    <properties>
+        <cxf-version>3.2.0</cxf-version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.6.0</version>
+                <executions>
+                    <execution>
+                        <id>singleEvent</id>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                        <configuration>
+                            <mainClass>com.baeldung.sse.jaxrs.client.SseClientApp</mainClass>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>broadcast</id>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                        <configuration>
+                            <mainClass>com.baeldung.sse.jaxrs.client.SseClientBroadcastApp</mainClass>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.cxf</groupId>
+            <artifactId>cxf-rt-rs-client</artifactId>
+            <version>${cxf-version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.cxf</groupId>
+            <artifactId>cxf-rt-rs-sse</artifactId>
+            <version>${cxf-version}</version>
+        </dependency>
+    </dependencies>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientApp.java

@@ -0,0 +1,48 @@
+package com.baeldung.sse.jaxrs.client;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.sse.InboundSseEvent;
+import javax.ws.rs.sse.SseEventSource;
+import java.util.function.Consumer;
+
+public class SseClientApp {
+
+    private static final String url = "http://127.0.0.1:9080/sse-jaxrs-server/sse/stock/prices";
+
+    public static void main(String... args) throws Exception {
+
+        Client client = ClientBuilder.newClient();
+        WebTarget target = client.target(url);
+        try (SseEventSource eventSource = SseEventSource.target(target).build()) {
+
+            eventSource.register(onEvent, onError, onComplete);
+            eventSource.open();
+
+            //Consuming events for one hour
+            Thread.sleep(60 * 60 * 1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        client.close();
+        System.out.println("End");
+    }
+
+    // A new event is received
+    private static Consumer<InboundSseEvent> onEvent = (inboundSseEvent) -> {
+        String data = inboundSseEvent.readData();
+        System.out.println(data);
+    };
+
+    //Error
+    private static Consumer<Throwable> onError = (throwable) -> {
+        throwable.printStackTrace();
+    };
+
+    //Connection close and there is nothing to receive
+    private static Runnable onComplete = () -> {
+        System.out.println("Done!");
+    };
+
+}

apache-cxf/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientBroadcastApp.java

@@ -0,0 +1,52 @@
+package com.baeldung.sse.jaxrs.client;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.sse.InboundSseEvent;
+import javax.ws.rs.sse.SseEventSource;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
+
+public class SseClientBroadcastApp {
+
+    private static final String subscribeUrl = "http://localhost:9080/sse-jaxrs-server/sse/stock/subscribe";
+
+
+    public static void main(String... args) throws Exception {
+
+        Client client = ClientBuilder.newClient();
+        WebTarget target = client.target(subscribeUrl);
+        try (final SseEventSource eventSource = SseEventSource.target(target)
+                .reconnectingEvery(5, TimeUnit.SECONDS)
+                .build()) {
+            eventSource.register(onEvent, onError, onComplete);
+            eventSource.open();
+            System.out.println("Wainting for incoming event ...");
+
+            //Consuming events for one hour
+            Thread.sleep(60 * 60 * 1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        client.close();
+        System.out.println("End");
+    }
+
+    // A new event is received
+    private static Consumer<InboundSseEvent> onEvent = (inboundSseEvent) -> {
+        String data = inboundSseEvent.readData();
+        System.out.println(data);
+    };
+
+    //Error
+    private static Consumer<Throwable> onError = (throwable) -> {
+        throwable.printStackTrace();
+    };
+
+    //Connection close and there is nothing to receive
+    private static Runnable onComplete = () -> {
+        System.out.println("Done!");
+    };
+
+}

apache-cxf/sse-jaxrs/sse-jaxrs-client/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

apache-cxf/sse-jaxrs/sse-jaxrs-server/pom.xml

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>sse-jaxrs</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>sse-jaxrs-server</artifactId>
+    <packaging>war</packaging>
+
+    <properties>
+        <liberty-maven-plugin.version>2.4.2</liberty-maven-plugin.version>
+        <failOnMissingWebXml>false</failOnMissingWebXml>
+        <openliberty-version>18.0.0.2</openliberty-version>
+    </properties>
+
+    <build>
+        <finalName>${artifactId}</finalName>
+        <plugins>
+            <plugin>
+                <groupId>net.wasdev.wlp.maven.plugins</groupId>
+                <artifactId>liberty-maven-plugin</artifactId>
+                <version>${liberty-maven-plugin.version}</version>
+                <configuration>
+                    <assemblyArtifact>
+                        <groupId>io.openliberty</groupId>
+                        <artifactId>openliberty-webProfile8</artifactId>
+                        <version>${openliberty-version}</version>
+                        <type>zip</type>
+                    </assemblyArtifact>
+                    <installAppPackages>project</installAppPackages>
+                    <looseApplication>true</looseApplication>
+                    <configFile>src/main/liberty/config/server.xml</configFile>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>install-server</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>install-server</goal>
+                            <goal>create-server</goal>
+                            <goal>install-feature</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>install-apps</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>install-apps</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>javax.ws.rs</groupId>
+            <artifactId>javax.ws.rs-api</artifactId>
+            <version>2.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.enterprise</groupId>
+            <artifactId>cdi-api</artifactId>
+            <version>2.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.json.bind</groupId>
+            <artifactId>javax.json.bind-api</artifactId>
+            <version>1.0</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/AppConfig.java

@@ -0,0 +1,8 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+@ApplicationPath("sse")
+public class AppConfig extends Application {
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/SseResource.java

@@ -0,0 +1,119 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+import javax.ws.rs.*;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.sse.OutboundSseEvent;
+import javax.ws.rs.sse.Sse;
+import javax.ws.rs.sse.SseBroadcaster;
+import javax.ws.rs.sse.SseEventSink;
+
+@ApplicationScoped
+@Path("stock")
+public class SseResource {
+
+    @Inject
+    private StockService stockService;
+
+    private Sse sse;
+    private SseBroadcaster sseBroadcaster;
+    private OutboundSseEvent.Builder eventBuilder;
+
+    @Context
+    public void setSse(Sse sse) {
+        this.sse = sse;
+        this.eventBuilder = sse.newEventBuilder();
+        this.sseBroadcaster = sse.newBroadcaster();
+    }
+
+    @GET
+    @Path("prices")
+    @Produces("text/event-stream")
+    public void getStockPrices(@Context SseEventSink sseEventSink,
+                               @HeaderParam(HttpHeaders.LAST_EVENT_ID_HEADER) @DefaultValue("-1") int lastReceivedId) {
+
+        int lastEventId = 1;
+        if (lastReceivedId != -1) {
+            lastEventId = ++lastReceivedId;
+        }
+        boolean running = true;
+        while (running) {
+            Stock stock = stockService.getNextTransaction(lastEventId);
+            if (stock != null) {
+                OutboundSseEvent sseEvent = this.eventBuilder
+                        .name("stock")
+                        .id(String.valueOf(lastEventId))
+                        .mediaType(MediaType.APPLICATION_JSON_TYPE)
+                        .data(Stock.class, stock)
+                        .reconnectDelay(3000)
+                        .comment("price change")
+                        .build();
+                sseEventSink.send(sseEvent);
+                lastEventId++;
+            }
+            //Simulate connection close
+            if (lastEventId % 5 == 0) {
+                sseEventSink.close();
+                break;
+            }
+
+            try {
+                //Wait 5 seconds
+                Thread.sleep(5 * 1000);
+            } catch (InterruptedException ex) {
+                // ...
+            }
+            //Simulatae a while boucle break
+            running = lastEventId <= 2000;
+        }
+        sseEventSink.close();
+    }
+
+    @GET
+    @Path("subscribe")
+    @Produces(MediaType.SERVER_SENT_EVENTS)
+    public void listen(@Context SseEventSink sseEventSink) {
+        sseEventSink.send(sse.newEvent("Welcome !"));
+        this.sseBroadcaster.register(sseEventSink);
+        sseEventSink.send(sse.newEvent("You are registred !"));
+    }
+
+    @GET
+    @Path("publish")
+    public void broadcast() {
+        Runnable r = new Runnable() {
+            @Override
+            public void run() {
+                int lastEventId = 0;
+                boolean running = true;
+                while (running) {
+                    lastEventId++;
+                    Stock stock = stockService.getNextTransaction(lastEventId);
+                    if (stock != null) {
+                        OutboundSseEvent sseEvent = eventBuilder
+                                .name("stock")
+                                .id(String.valueOf(lastEventId))
+                                .mediaType(MediaType.APPLICATION_JSON_TYPE)
+                                .data(Stock.class, stock)
+                                .reconnectDelay(3000)
+                                .comment("price change")
+                                .build();
+                        sseBroadcaster.broadcast(sseEvent);
+                    }
+                    try {
+                        //Wait 5 seconds
+                        Thread.currentThread().sleep(5 * 1000);
+                    } catch (InterruptedException ex) {
+                        // ...
+                    }
+                    //Simulatae a while boucle break
+                    running = lastEventId <= 2000;
+                }
+            }
+        };
+        new Thread(r).start();
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/Stock.java

@@ -0,0 +1,50 @@
+package com.baeldung.sse.jaxrs;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+public class Stock {
+    private Integer id;
+    private String name;
+    private BigDecimal price;
+    LocalDateTime dateTime;
+
+    public Stock(Integer id, String name, BigDecimal price, LocalDateTime dateTime) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.dateTime = dateTime;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public LocalDateTime getDateTime() {
+        return dateTime;
+    }
+
+    public void setDateTime(LocalDateTime dateTime) {
+        this.dateTime = dateTime;
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/StockService.java

@@ -0,0 +1,78 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.context.Initialized;
+import javax.enterprise.event.Event;
+import javax.enterprise.event.Observes;
+import javax.inject.Inject;
+import javax.inject.Named;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@ApplicationScoped
+@Named
+public class StockService {
+
+    private static final BigDecimal UP = BigDecimal.valueOf(1.05f);
+    private static final BigDecimal DOWN = BigDecimal.valueOf(0.95f);
+
+    List<String> stockNames = Arrays.asList("GOOG", "IBM", "MS", "GOOG", "YAHO");
+    List<Stock> stocksDB = new ArrayList<>();
+    private AtomicInteger counter = new AtomicInteger(0);
+
+    public void init(@Observes @Initialized(ApplicationScoped.class) Object init) {
+        //Open price
+        System.out.println("@Start Init ...");
+        stockNames.forEach(stockName -> {
+            stocksDB.add(new Stock(counter.incrementAndGet(), stockName, generateOpenPrice(), LocalDateTime.now()));
+        });
+
+        Runnable runnable = new Runnable() {
+            @Override
+            public void run() {
+                //Simulate Change price and put every x seconds
+                while (true) {
+                    int indx = new Random().nextInt(stockNames.size());
+                    String stockName = stockNames.get(indx);
+                    BigDecimal price = getLastPrice(stockName);
+                    BigDecimal newprice = changePrice(price);
+                    Stock stock = new Stock(counter.incrementAndGet(), stockName, newprice, LocalDateTime.now());
+                    stocksDB.add(stock);
+
+                    int r = new Random().nextInt(30);
+                    try {
+                        Thread.currentThread().sleep(r*1000);
+                    } catch (InterruptedException ex) {
+                        // ...
+                    }
+                }
+            }
+        };
+        new Thread(runnable).start();
+        System.out.println("@End Init ...");
+    }
+
+    public Stock getNextTransaction(Integer lastEventId) {
+        return stocksDB.stream().filter(s -> s.getId().equals(lastEventId)).findFirst().orElse(null);
+    }
+
+    BigDecimal generateOpenPrice() {
+        float min = 70;
+        float max = 120;
+        return BigDecimal.valueOf(min + new Random().nextFloat() * (max - min)).setScale(4,RoundingMode.CEILING);
+    }
+
+    BigDecimal changePrice(BigDecimal price) {
+        return Math.random() >= 0.5 ? price.multiply(UP).setScale(4,RoundingMode.CEILING) : price.multiply(DOWN).setScale(4,RoundingMode.CEILING);
+    }
+
+    private BigDecimal getLastPrice(String stockName) {
+        return stocksDB.stream().filter(stock -> stock.getName().equals(stockName)).findFirst().get().getPrice();
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/liberty/config/server.xml

@@ -0,0 +1,7 @@
+<server description="OpenLiberty Server">
+    <featureManager>
+        <feature>jaxrs-2.1</feature>
+        <feature>cdi-2.0</feature>
+    </featureManager>
+    <httpEndpoint httpPort="9080" httpsPort="9443" id="defaultHttpEndpoint" host="*"/>
+</server>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/resources/META-INF/beans.xml

@@ -0,0 +1,6 @@
+<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
+		http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
+       bean-discovery-mode="all">
+</beans>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
+    version="4.0">
+    <display-name>Hello Servlet</display-name>
+
+    <welcome-file-list>
+        <welcome-file>index.html</welcome-file>
+    </welcome-file-list>
+
+</web-app>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/index.html

@@ -0,0 +1 @@
+index

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse-broadcast.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Server-Sent Event Broadcasting</title>
+</head>
+<body>
+<h2>Stock prices :</h2>
+<div>
+    <ul id="data">
+    </ul>
+</div>
+<script>
+
+    var source = new EventSource('sse/stock/subscribe');
+    source.onopen = function(event) {
+        console.log(event);
+    };
+    source.addEventListener("stock", function(event) {
+        append(event.data);
+    }, false);
+
+    source.onmessage = function(event) {
+        append(event.data);
+    };
+    source.onerror = function(event) {
+        console.log(event);
+    };
+
+    function append(data) {
+        var ul = document.getElementById("data");
+        var li = document.createElement("li");
+        li.appendChild(document.createTextNode(data));
+        ul.insertBefore(li, ul.childNodes[0]);
+    };
+
+</script>
+</body>
+</html>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Server-Sent Event</title>
+</head>
+<body>
+<h2>Stock prices :</h2>
+<div>
+    <ul id="data">
+    </ul>
+</div>
+<script>
+
+    var source = new EventSource('sse/stock/prices');
+    source.onopen = function(event) {
+        console.log(event);
+    };
+    source.addEventListener("stock", function(event) {
+        append(event.data);
+    }, false);
+
+    source.onmessage = function(event) {
+        append(event.data);
+    };
+    source.onerror = function(event) {
+        console.log(event);
+    };
+
+    function append(data) {
+        var ul = document.getElementById("data");
+        var li = document.createElement("li");
+        li.appendChild(document.createTextNode(data));
+        ul.insertBefore(li, ul.childNodes[0]);
+    };
+
+</script>
+</body>
+</html>

aws/pom.xml

@@ -137,7 +137,7 @@
         <aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
         <gson.version>2.8.0</gson.version>
         <aws-java-sdk.version>1.11.290</aws-java-sdk.version>
-        <mockito-core.version>2.8.9</mockito-core.version>
+        <mockito-core.version>2.21.0</mockito-core.version>
         <assertj-core.version>3.8.0</assertj-core.version>
         <dynamodblocal.version>1.11.86</dynamodblocal.version>
         <dynamodblocal.repository.url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</dynamodblocal.repository.url>

core-java-8/README.md

@@ -14,7 +14,6 @@
 - [Guide to Java 8 groupingBy Collector](http://www.baeldung.com/java-groupingby-collector)
 - [Strategy Design Pattern in Java 8](http://www.baeldung.com/java-strategy-pattern)
 - [Java 8 and Infinite Streams](http://www.baeldung.com/java-inifinite-streams)
-- [String Operations with Java Streams](http://www.baeldung.com/java-stream-operations-on-strings)
 - [Exceptions in Java 8 Lambda Expressions](http://www.baeldung.com/java-lambda-exceptions)
 - [Java 8 Stream findFirst() vs. findAny()](http://www.baeldung.com/java-stream-findfirst-vs-findany)
 - [Guide to Java 8 Comparator.comparing()](http://www.baeldung.com/java-8-comparator-comparing)
@@ -34,13 +33,11 @@
 - [Copy a File with Java](http://www.baeldung.com/java-copy-file)
 - [Static and Default Methods in Interfaces in Java](http://www.baeldung.com/java-static-default-methods)
 - [Iterable to Stream in Java](http://www.baeldung.com/java-iterable-to-stream)
-- [Converting String to Stream of chars](http://www.baeldung.com/java-string-to-stream)
 - [How to Iterate Over a Stream With Indices](http://www.baeldung.com/java-stream-indices)
 - [Efficient Word Frequency Calculator in Java](http://www.baeldung.com/java-word-frequency)
 - [Primitive Type Streams in Java 8](http://www.baeldung.com/java-8-primitive-streams)
 - [Fail-Safe Iterator vs Fail-Fast Iterator](http://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)
 - [Shuffling Collections In Java](http://www.baeldung.com/java-shuffle-collection)
-- [Java 8 StringJoiner](http://www.baeldung.com/java-string-joiner)
 - [Introduction to Spliterator in Java](http://www.baeldung.com/java-spliterator)
 - [Java 8 Math New Methods](http://www.baeldung.com/java-8-math)
 - [Overview of Java Built-in Annotations](http://www.baeldung.com/java-default-annotations)
@@ -54,7 +51,6 @@
 - [Java 8 Unsigned Arithmetic Support](http://www.baeldung.com/java-unsigned-arithmetic)
 - [How to Get the Start and the End of a Day using Java](http://www.baeldung.com/java-day-start-end)
 - [Generalized Target-Type Inference in Java](http://www.baeldung.com/java-generalized-target-type-inference)
-- [Image to Base64 String Conversion](http://www.baeldung.com/java-base64-image-string)
 - [Calculate Age in Java](http://www.baeldung.com/java-get-age)
 - [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)
 - [Increment Date in Java](http://www.baeldung.com/java-increment-date)

core-java-9/README.md

@@ -17,7 +17,6 @@
 - [Java 9 Reactive Streams](http://www.baeldung.com/java-9-reactive-streams)
 - [How to Get All Dates Between Two Dates?](http://www.baeldung.com/java-between-dates)
 - [Java 9 java.util.Objects Additions](http://www.baeldung.com/java-9-objects-new)
-- [Compact Strings in Java 9](http://www.baeldung.com/java-9-compact-string)
 - [Convert Date to LocalDate or LocalDateTime and Back](http://www.baeldung.com/java-date-to-localdate-and-localdatetime)
 - [Java 9 Variable Handles Demistyfied](http://www.baeldung.com/java-variable-handles)
 - [Exploring the New HTTP Client in Java 9](http://www.baeldung.com/java-9-http-client)

core-java-9/src/main/java/com/baeldung/java9/rangedates/DatesCollectionIteration.java

@@ -0,0 +1,24 @@
+package com.baeldung.java9.rangedates;
+
+import java.util.Collection;
+import java.util.Date;
+
+public class DatesCollectionIteration {
+
+    public void iteratingRangeOfDatesJava7(Collection<Date> dates) {
+
+        for (Date date : dates) {
+            processDate(date);
+        }
+    }
+
+    public void iteratingRangeOfDatesJava8(Collection<Date> dates) {
+        dates.stream()
+            .forEach(this::processDate);
+    }
+
+    private void processDate(Date date) {
+        System.out.println(date);
+    }
+
+}

core-java-9/src/main/java/com/baeldung/java9/rangedates/RangeDatesIteration.java

@@ -0,0 +1,43 @@
+package com.baeldung.java9.rangedates;
+
+import java.time.LocalDate;
+import java.util.Calendar;
+import java.util.Date;
+
+public class RangeDatesIteration {
+
+    public void iterateBetweenDatesJava9(LocalDate startDate, LocalDate endDate) {
+
+        startDate.datesUntil(endDate)
+            .forEach(this::processDate);
+    }
+
+    public void iterateBetweenDatesJava8(LocalDate start, LocalDate end) {
+        for (LocalDate date = start; date.isBefore(end); date = date.plusDays(1)) {
+            processDate(date);
+        }
+    }
+
+    public void iterateBetweenDatesJava7(Date start, Date end) {
+        Date current = start;
+
+        while (current.before(end)) {
+            processDate(current);
+
+            Calendar calendar = Calendar.getInstance();
+            calendar.setTime(current);
+
+            calendar.add(Calendar.DATE, 1);
+
+            current = calendar.getTime();
+        }
+    }
+
+    private void processDate(LocalDate date) {
+        System.out.println(date);
+    }
+
+    private void processDate(Date date) {
+        System.out.println(date);
+    }
+}

core-java-9/src/test/java/com/baeldung/java9/rangedates/DatesCollectionIterationUnitTest.java

@@ -0,0 +1,61 @@
+package com.baeldung.java9.rangedates;
+
+import java.time.LocalDate;
+import java.time.ZoneId;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Date;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.junit.Test;
+
+public class DatesCollectionIterationUnitTest {
+
+    private Collection<LocalDate> localDates = LocalDate.now()
+        .datesUntil(LocalDate.now()
+            .plus(10L, ChronoUnit.DAYS))
+        .collect(Collectors.toList());
+
+    private Collection<Date> dates = localDates.stream()
+        .map(localDate -> Date.from(localDate.atStartOfDay(ZoneId.systemDefault())
+            .toInstant()))
+        .collect(Collectors.toList());
+
+    @Test
+    public void givenIteratingListOfDatesJava7_WhenStartTodayAndEnding10DaysAhead() {
+        DatesCollectionIteration iterateInColleciton = new DatesCollectionIteration();
+        Calendar today = Calendar.getInstance();
+        Calendar next10Ahead = (Calendar) today.clone();
+        next10Ahead.add(Calendar.DATE, 10);
+
+        iterateInColleciton.iteratingRangeOfDatesJava7(createRangeDates(today.getTime(), next10Ahead.getTime()));
+    }
+
+    @Test
+    public void givenIteratingListOfDatesJava8_WhenStartTodayAndEnd10DaysAhead() {
+        DatesCollectionIteration iterateInColleciton = new DatesCollectionIteration();
+
+        iterateInColleciton.iteratingRangeOfDatesJava8(dates);
+    }
+
+    private List<Date> createRangeDates(Date start, Date end) {
+
+        List<Date> dates = new ArrayList<>();
+        Date current = start;
+
+        while (current.before(end)) {
+            dates.add(current);
+            
+            Calendar calendar = Calendar.getInstance();
+            calendar.setTime(current);
+            calendar.add(Calendar.DATE, 1);
+
+            current = calendar.getTime();
+        }
+
+        return dates;
+    }
+}

core-java-9/src/test/java/com/baeldung/java9/rangedates/RangeDatesIterationUnitTest.java

@@ -0,0 +1,48 @@
+package com.baeldung.java9.rangedates;
+
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+import java.util.Calendar;
+import java.util.Date;
+
+import org.junit.Test;
+
+public class RangeDatesIterationUnitTest {
+
+    @Test
+    public void givenIterateBetweenDatesJava9_WhenStartDateAsTodayAndEndDateAs10DaysAhead() {
+        LocalDate start = LocalDate.now();
+        LocalDate end = start.plus(10L, ChronoUnit.DAYS);
+
+        RangeDatesIteration iteration = new RangeDatesIteration();
+
+        iteration.iterateBetweenDatesJava9(start, end);
+    }
+
+    @Test
+    public void givenIterateBetweenDatesJava8_WhenStartDateAsTodayAndEndDateAs10DaysAhead() {
+        LocalDate start = LocalDate.now();
+        LocalDate end = start.plus(10L, ChronoUnit.DAYS);
+
+        RangeDatesIteration iteration = new RangeDatesIteration();
+
+        iteration.iterateBetweenDatesJava8(start, end);
+    }
+
+    @Test
+    public void givenIterateBetweenDatesJava7_WhenStartDateAsTodayAndEndDateAs10DaysAhead() {
+        Calendar today = Calendar.getInstance();
+        Calendar calendar = Calendar.getInstance();
+        calendar.clear();
+        calendar.set(today.get(Calendar.YEAR), today.get(Calendar.MONTH), today.get(Calendar.DATE));
+        Date start = calendar.getTime();
+
+        calendar.add(Calendar.DATE, 10);
+        Date end = calendar.getTime();
+
+        RangeDatesIteration iteration = new RangeDatesIteration();
+
+        iteration.iterateBetweenDatesJava7(start, end);
+    }
+
+}

core-java-collections/README.md

@@ -36,3 +36,4 @@
 - [Remove the First Element from a List](http://www.baeldung.com/java-remove-first-element-from-list)
 - [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)
 - [Initializing HashSet at the Time of Construction](http://www.baeldung.com/java-initialize-hashset)
+- [Removing the First Element of an Array](https://www.baeldung.com/java-array-remove-first-element)

core-java-collections/pom.xml

@@ -53,15 +53,27 @@
             <version>${junit.platform.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${openjdk.jmh.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${openjdk.jmh.version}</version>
+        </dependency>
     </dependencies>
 
+
     <properties>
+        <openjdk.jmh.version>1.19</openjdk.jmh.version>
         <junit.platform.version>1.2.0</junit.platform.version>
         <commons-lang3.version>3.5</commons-lang3.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <collections-generic.version>4.01</collections-generic.version>
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.6.1</assertj.version>
-        <eclipse.collections.version>9.2.0</eclipse.collections.version>
+        <eclipse.collections.version>7.1.0</eclipse.collections.version>
     </properties>
 </project>

core-java-collections/src/main/java/com/baeldung/performance/CollectionsBenchmark.java

@@ -0,0 +1,59 @@
+package com.baeldung.performance;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 5)
+public class CollectionsBenchmark {
+
+    @State(Scope.Thread)
+    public static class MyState {
+        private Set<Employee> employeeSet = new HashSet<>();
+        private List<Employee> employeeList = new ArrayList<>();
+
+        private long iterations = 10000;
+
+        private Employee employee = new Employee(100L, "Harry");
+
+        @Setup(Level.Trial)
+        public void setUp() {
+
+            for (long i = 0; i < iterations; i++) {
+                employeeSet.add(new Employee(i, "John"));
+                employeeList.add(new Employee(i, "John"));
+            }
+
+            employeeList.add(employee);
+            employeeSet.add(employee);
+        }
+    }
+
+    @Benchmark
+    public boolean testArrayList(MyState state) {
+        return state.employeeList.contains(state.employee);
+    }
+
+    @Benchmark
+    public boolean testHashSet(MyState state) {
+        return state.employeeSet.contains(state.employee);
+    }
+
+    public static void main(String[] args) throws Exception {
+        Options options = new OptionsBuilder()
+                .include(CollectionsBenchmark.class.getSimpleName()).threads(1)
+                .forks(1).shouldFailOnError(true)
+                .shouldDoGC(true)
+                .jvmArgs("-server").build();
+        new Runner(options).run();
+    }
+}

core-java-collections/src/main/java/com/baeldung/performance/Employee.java

@@ -0,0 +1,31 @@
+package com.baeldung.performance;
+
+public class Employee {
+
+    private Long id;
+    private String name;
+
+    public Employee(Long id, String name) {
+        this.name = name;
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (!id.equals(employee.id)) return false;
+        return name.equals(employee.name);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = id.hashCode();
+        result = 31 * result + name.hashCode();
+        return result;
+    }
+}

core-java-collections/src/test/java/com/baeldung/collection/CollectionsEmpty.java

@@ -0,0 +1,26 @@
+package com.baeldung.collection;
+
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Collections;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CollectionsEmpty {
+
+    @Test
+    public void givenArrayList_whenAddingElement_addsNewElement() {
+        ArrayList<String> mutableList = new ArrayList<>();
+        mutableList.add("test");
+
+        Assert.assertEquals(mutableList.size(), 1);
+        Assert.assertEquals(mutableList.get(0), "test");
+    }
+
+    @Test(expected = UnsupportedOperationException.class)
+    public void givenCollectionsEmptyList_whenAddingElement_throwsUnsupportedOperationException() {
+        List<String> immutableList = Collections.emptyList();
+        immutableList.add("test");
+    }
+
+}

core-java-collections/src/test/java/com/baeldung/collection/StreamOperateAndRemoveUnitTest.java

@@ -0,0 +1,78 @@
+package com.baeldung.collection;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StreamOperateAndRemoveUnitTest {
+
+    private List<Item> itemList;
+
+    @Before
+    public void setup() {
+
+        itemList = new ArrayList<>();
+        for (int i = 0; i < 10; i++) {
+            itemList.add(new Item(i));
+        }
+    }
+
+    @Test
+    public void givenAListOf10Items_whenFilteredForQualifiedItems_thenFilteredListContains5Items() {
+
+        final List<Item> filteredList = itemList.stream().filter(item -> item.isQualified())
+            .collect(Collectors.toList());
+
+        Assert.assertEquals(5, filteredList.size());
+    }
+
+    @Test
+    public void givenAListOf10Items_whenOperateAndRemoveQualifiedItemsUsingRemoveIf_thenListContains5Items() {
+
+        itemList.stream().filter(item -> item.isQualified()).forEach(item -> item.operate());
+        itemList.removeIf(item -> item.isQualified());
+
+        Assert.assertEquals(5, itemList.size());
+    }
+
+    @Test
+    public void givenAListOf10Items_whenOperateAndRemoveQualifiedItemsUsingRemoveAll_thenListContains5Items() {
+
+        final List<Item> operatedList = new ArrayList<>();
+        itemList.stream().filter(item -> item.isQualified()).forEach(item -> {
+            item.operate();
+            operatedList.add(item);
+        });
+        itemList.removeAll(operatedList);
+
+        Assert.assertEquals(5, itemList.size());
+    }
+
+    class Item {
+
+        private final Logger logger = LoggerFactory.getLogger(this.getClass().getName());
+
+        private final int value;
+
+        public Item(final int value) {
+
+            this.value = value;
+        }
+
+        public boolean isQualified() {
+
+            return value % 2 == 0;
+        }
+
+        public void operate() {
+
+            logger.info("Even Number: " + this.value);
+        }
+    }
+}

core-java-collections/src/test/java/com/baeldung/list/removefirst/RemoveFirstElementUnitTest.java

@@ -4,6 +4,7 @@ import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.*;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -48,4 +49,14 @@ public class RemoveFirstElementUnitTest {
         assertThat(linkedList, not(contains("cat")));
     }
 
+    @Test
+    public void givenStringArray_whenRemovingFirstElement_thenArrayIsSmallerAndElementRemoved() {
+        String[] stringArray = {"foo", "bar", "baz"};
+
+        String[] modifiedArray = Arrays.copyOfRange(stringArray, 1, stringArray.length);
+
+        assertThat(modifiedArray.length, is(2));
+        assertThat(modifiedArray[0], is("bar"));
+    }
+
 }

core-java-collections/src/test/java/org/baeldung/java/collections/CollectionsEmpty.java

@@ -0,0 +1,26 @@
+package org.baeldung.java.collections;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+class CollectionsEmpty {
+
+    @Test
+    public void givenArrayList_whenAddingElement_addsNewElement() {
+        ArrayList<String> mutableList = new ArrayList<>();
+        mutableList.add("test");
+
+        Assert.assertEquals(mutableList.size(), 1);
+        Assert.assertEquals(mutableList.get(0), "test");
+    }
+
+    @Test(expected = UnsupportedOperationException.class)
+    public void givenCollectionsEmptyList_whenAddingElement_throwsUnsupportedOperationException() {
+        List<String> immutableList = Collections.emptyList();
+        immutableList.add("test");
+    }
+
+}

core-java-concurrency-collections/.gitignore

@@ -0,0 +1,26 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+*.txt
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml

core-java-concurrency-collections/README.md

@@ -0,0 +1,15 @@
+=========
+
+## Core Java Concurrency Collections Examples
+
+### Relevant Articles: 
+- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
+- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
+- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
+- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
+- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
+- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
+- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
+- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
+- [Guide to the ConcurrentSkipListMap](http://www.baeldung.com/java-concurrent-skip-list-map)
+- [Guide to CopyOnWriteArrayList](http://www.baeldung.com/java-copy-on-write-arraylist)

core-java-concurrency-collections/pom.xml

@@ -0,0 +1,94 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>core-java-concurrency-collections</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>core-java-concurrency-collections</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>${commons-math3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.jayway.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${avaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>core-java-concurrency-collections</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy-dependencies</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${project.build.directory}/libs</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            
+        </plugins>
+    </build>
+
+    <properties>
+        <!-- util -->
+        <guava.version>21.0</guava.version>
+        <commons-lang3.version>3.5</commons-lang3.version>
+        <commons-math3.version>3.6.1</commons-math3.version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <collections-generic.version>4.01</collections-generic.version>
+        <!-- testing -->
+        <assertj.version>3.6.1</assertj.version>
+        <avaitility.version>1.7.0</avaitility.version>
+    </properties>
+
+</project>

core-java-concurrency-collections/src/main/java/com/baeldung/concurrent/blockingqueue/BlockingQueueUsage.java

@@ -10,15 +10,18 @@ public class BlockingQueueUsage {
         int N_CONSUMERS = Runtime.getRuntime().availableProcessors();
         int poisonPill = Integer.MAX_VALUE;
         int poisonPillPerProducer = N_CONSUMERS / N_PRODUCERS;
-
+        int mod = N_CONSUMERS % N_PRODUCERS;
         BlockingQueue<Integer> queue = new LinkedBlockingQueue<>(BOUND);
 
-        for (int i = 0; i < N_PRODUCERS; i++) {
+        for (int i = 1; i < N_PRODUCERS; i++) {
             new Thread(new NumbersProducer(queue, poisonPill, poisonPillPerProducer)).start();
         }
 
         for (int j = 0; j < N_CONSUMERS; j++) {
             new Thread(new NumbersConsumer(queue, poisonPill)).start();
         }
+        
+        new Thread(new NumbersProducer(queue, poisonPill, poisonPillPerProducer+mod)).start();
+
     }
 }

core-java-concurrency-collections/src/main/resources/logback.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-concurrency-collections/src/test/resources/.gitignore

@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

core-java-concurrency/README.md

@@ -7,22 +7,12 @@
 - [A Guide to the Java ExecutorService](http://www.baeldung.com/java-executor-service-tutorial)
 - [Introduction to Thread Pools in Java](http://www.baeldung.com/thread-pool-java-and-guava)
 - [Guide to java.util.concurrent.Future](http://www.baeldung.com/java-future)
-- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
 - [Guide to CountDownLatch in Java](http://www.baeldung.com/java-countdown-latch)
-- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
-- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
-- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
-- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
 - [Guide to java.util.concurrent.Locks](http://www.baeldung.com/java-concurrent-locks)
 - [An Introduction to ThreadLocal in Java](http://www.baeldung.com/java-threadlocal)
-- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
-- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
-- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
-- [Guide to the ConcurrentSkipListMap](http://www.baeldung.com/java-concurrent-skip-list-map)
 - [Difference Between Wait and Sleep in Java](http://www.baeldung.com/java-wait-and-sleep)
 - [LongAdder and LongAccumulator in Java](http://www.baeldung.com/java-longadder-and-longaccumulator)
 - [The Dining Philosophers Problem in Java](http://www.baeldung.com/java-dining-philoshophers)
-- [Guide to CopyOnWriteArrayList](http://www.baeldung.com/java-copy-on-write-arraylist)
 - [Guide to the Java Phaser](http://www.baeldung.com/java-phaser)
 - [Guide to Synchronized Keyword in Java](http://www.baeldung.com/java-synchronized)
 - [An Introduction to Atomic Variables in Java](http://www.baeldung.com/java-atomic-variables)

core-java-io/src/main/java/com/baeldung/fileparser/BufferedReaderExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+
+public class BufferedReaderExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+
+        ArrayList<String> result = new ArrayList<>();
+
+        try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
+
+            while (br.ready()) {
+                result.add(br.readLine());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/FileReaderExample.java

@@ -0,0 +1,31 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+
+public class FileReaderExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+
+        ArrayList<String> result = new ArrayList<>();
+
+        try (FileReader f = new FileReader(filename)) {
+            StringBuffer sb = new StringBuffer();
+            while (f.ready()) {
+                char c = (char) f.read();
+                if (c == '\n') {
+                    result.add(sb.toString());
+                    sb = new StringBuffer();
+                } else {
+                    sb.append(c);
+                }
+            }
+            if (sb.length() > 0) {
+                result.add(sb.toString());
+            }
+        }
+        
+        return result;
+    }
+}

core-java-io/src/main/java/com/baeldung/fileparser/FilesReadLinesExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.fileparser;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FilesReadLinesExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+        
+        List<String> result = Files.readAllLines(Paths.get(filename));
+        
+        return (ArrayList<String>) result;
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/ScannerIntExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class ScannerIntExample {
+
+    protected static ArrayList<Integer> generateArrayListFromFile(String filename) throws IOException {
+        
+        ArrayList<Integer> result = new ArrayList<>();
+
+        try (Scanner s = new Scanner(new FileReader(filename))) {
+
+            while (s.hasNext()) {
+                result.add(s.nextInt());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/ScannerStringExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class ScannerStringExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+        
+        ArrayList<String> result = new ArrayList<>();
+
+        try (Scanner s = new Scanner(new FileReader(filename))) {
+
+            while (s.hasNext()) {
+                result.add(s.nextLine());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/test/java/com/baeldung/file/FilenameFilterManualTest.java

@@ -18,7 +18,7 @@ public class FilenameFilterManualTest {
     @BeforeClass
     public static void setupClass() {
         directory = new File(FilenameFilterManualTest.class.getClassLoader()
-            .getResource("testFolder")
+            .getResource("fileNameFilterManualTestFolder")
             .getFile());
     }
 

core-java-io/src/test/java/com/baeldung/fileparser/BufferedReaderUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class BufferedReaderUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = BufferedReaderExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/FileReaderUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class FileReaderUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = FileReaderExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/FilesReadAllLinesUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class FilesReadAllLinesUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = FilesReadLinesExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/ScannerIntUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class ScannerIntUnitTest {
+
+    protected static final String NUMBER_FILENAME = "src/test/resources/sampleNumberFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetIntArrayList() throws IOException {
+        List<Integer> numbers = ScannerIntExample.generateArrayListFromFile(NUMBER_FILENAME);
+        assertTrue("File does not has 2 lines", numbers.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/ScannerStringUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class ScannerStringUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = ScannerStringExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/resources/sampleNumberFile.txt

@@ -0,0 +1,2 @@
+111
+222

core-java-io/src/test/resources/sampleTextFile.txt

@@ -0,0 +1,2 @@
+Hello 
+World

core-java-persistence/README.md

@@ -0,0 +1,8 @@
+=========
+
+## Core Java Persistence Examples
+
+### Relevant Articles: 
+- [Introduction to JDBC](http://www.baeldung.com/java-jdbc)
+- [Batch Processing in JDBC](http://www.baeldung.com/jdbc-batch-processing)
+- [Introduction to the JDBC RowSet Interface in Java](http://www.baeldung.com/java-jdbc-rowset)

core-java-persistence/pom.xml

@@ -39,6 +39,16 @@
             <artifactId>c3p0</artifactId>
             <version>${c3p0.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${springframework.spring-web.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+            <version>${springframework.boot.spring-boot-starter.version}</version>
+        </dependency>
     </dependencies>
     <build>
         <finalName>core-java-persistence</finalName>
@@ -55,5 +65,7 @@
         <commons-dbcp2.version>2.4.0</commons-dbcp2.version>
         <HikariCP.version>3.2.0</HikariCP.version>
         <c3p0.version>0.9.5.2</c3p0.version>
+        <springframework.boot.spring-boot-starter.version>1.5.8.RELEASE</springframework.boot.spring-boot-starter.version>
+        <springframework.spring-web.version>4.3.4.RELEASE</springframework.spring-web.version>
     </properties>
 </project>

core-java-sun/pom.xml

@@ -303,7 +303,7 @@
         <avaitility.version>1.7.0</avaitility.version>
 
         <!-- maven plugins -->
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+        <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
         <sun-tools.version>1.8.0</sun-tools.version>
         <maven-jar-plugin.version>3.0.2</maven-jar-plugin.version>
     </properties>

core-java/README.md

@@ -3,18 +3,14 @@
 ## Core Java Cookbooks and Examples
 
 ### Relevant Articles: 
-- [Java – Generate Random String](http://www.baeldung.com/java-random-string)
 - [Java Timer](http://www.baeldung.com/java-timer-and-timertask)
 - [How to Run a Shell Command in Java](http://www.baeldung.com/run-shell-command-in-java)
 - [MD5 Hashing in Java](http://www.baeldung.com/java-md5)
 - [Guide to Java Reflection](http://www.baeldung.com/java-reflection)
 - [A Guide to Java Sockets](http://www.baeldung.com/a-guide-to-java-sockets)
-- [Convert char to String in Java](http://www.baeldung.com/java-convert-char-to-string)
-- [Convert String to int or Integer in Java](http://www.baeldung.com/java-convert-string-to-int-or-integer)
 - [Java – Try with Resources](http://www.baeldung.com/java-try-with-resources)
 - [Guide to the Fork/Join Framework in Java](http://www.baeldung.com/java-fork-join)
 - [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
-- [How to Convert String to different data types in Java](http://www.baeldung.com/java-string-conversions)
 - [Introduction to Java Generics](http://www.baeldung.com/java-generics)
 - [Generate equals() and hashCode() with Eclipse](http://www.baeldung.com/java-eclipse-equals-and-hashcode)
 - [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)
@@ -37,8 +33,6 @@
 - [A Quick JUnit vs TestNG Comparison](http://www.baeldung.com/junit-vs-testng)
 - [Java Primitive Conversions](http://www.baeldung.com/java-primitive-conversions)
 - [Java Money and the Currency API](http://www.baeldung.com/java-money-and-currency)
-- [Converting Strings to Enums in Java](http://www.baeldung.com/java-string-to-enum)
-- [Quick Guide to the Java StringTokenizer](http://www.baeldung.com/java-stringtokenizer)
 - [JVM Log Forging](http://www.baeldung.com/jvm-log-forging)
 - [Guide to sun.misc.Unsafe](http://www.baeldung.com/java-unsafe)
 - [How to Perform a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
@@ -53,36 +47,28 @@
 - [How to Get a Name of a Method Being Executed?](http://www.baeldung.com/java-name-of-executing-method)
 - [Dynamic Proxies in Java](http://www.baeldung.com/java-dynamic-proxies)
 - [How to Copy an Array in Java](http://www.baeldung.com/java-array-copy)
-- [Introduction to JDBC](http://www.baeldung.com/java-jdbc)
 - [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
 - [Converting a Stack Trace to a String in Java](http://www.baeldung.com/java-stacktrace-to-string)
-- [Count Occurrences of a Char in a String](http://www.baeldung.com/java-count-chars)
 - [Java Double Brace Initialization](http://www.baeldung.com/java-double-brace-initialization)
 - [The StackOverflowError in Java](http://www.baeldung.com/java-stack-overflow-error)
-- [Split a String in Java](http://www.baeldung.com/java-split-string)
 - [Introduction to Java Serialization](http://www.baeldung.com/java-serialization)
-- [How to Remove the Last Character of a String?](http://www.baeldung.com/java-remove-last-character-of-string)
 - [ClassNotFoundException vs NoClassDefFoundError](http://www.baeldung.com/java-classnotfoundexception-and-noclassdeffounderror)
 - [Guide to UUID in Java](http://www.baeldung.com/java-uuid)
 - [Guide to Escaping Characters in Java RegExps](http://www.baeldung.com/java-regexp-escape-char)
 - [Guide to hashCode() in Java](http://www.baeldung.com/java-hashcode)
 - [Difference between URL and URI](http://www.baeldung.com/java-url-vs-uri)
 - [Broadcasting and Multicasting in Java](http://www.baeldung.com/java-broadcast-multicast)
-- [CharSequence vs. String in Java](http://www.baeldung.com/java-char-sequence-string)
 - [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
 - [Guide to the Diamond Operator in Java](http://www.baeldung.com/java-diamond-operator)
 - [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
 - [OutOfMemoryError: GC Overhead Limit Exceeded](http://www.baeldung.com/java-gc-overhead-limit-exceeded)
-- [StringBuilder and StringBuffer in Java](http://www.baeldung.com/java-string-builder-string-buffer)
 - [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
 - [A Guide to the Static Keyword in Java](http://www.baeldung.com/java-static)
 - [Initializing Arrays in Java](http://www.baeldung.com/java-initialize-array)
-- [Guide to Java String Pool](http://www.baeldung.com/java-string-pool)
 - [Quick Example - Comparator vs Comparable in Java](http://www.baeldung.com/java-comparator-comparable)
 - [Quick Guide to Java Stack](http://www.baeldung.com/java-stack)
 - [The Java continue and break Keywords](http://www.baeldung.com/java-continue-and-break)
 - [Guide to java.util.Formatter](http://www.baeldung.com/java-string-formatter)
-- [Batch Processing in JDBC](http://www.baeldung.com/jdbc-batch-processing)
 - [Check if a Java Array Contains a Value](http://www.baeldung.com/java-array-contains-value)
 - [How to Invert an Array in Java](http://www.baeldung.com/java-invert-array)
 - [Guide to the Cipher Class](http://www.baeldung.com/java-cipher-class)
@@ -90,7 +76,6 @@
 - [Implementing a Binary Tree in Java](http://www.baeldung.com/java-binary-tree)
 - [A Guide to ThreadLocalRandom in Java](http://www.baeldung.com/java-thread-local-random)
 - [RegEx for matching Date Pattern in Java](http://www.baeldung.com/java-date-regular-expressions)
-- [Introduction to the JDBC RowSet Interface in Java](http://www.baeldung.com/java-jdbc-rowset)
 - [Nested Classes in Java](http://www.baeldung.com/java-nested-classes)
 - [A Guide to Java Loops](http://www.baeldung.com/java-loops)
 - [Varargs in Java](http://www.baeldung.com/java-varargs)
@@ -105,15 +90,12 @@
 - [The Trie Data Structure in Java](http://www.baeldung.com/trie-java)
 - [Introduction to Javadoc](http://www.baeldung.com/javadoc)
 - [How to Make a Deep Copy of an Object in Java](http://www.baeldung.com/java-deep-copy)
-- [Check if a String is a Palindrome](http://www.baeldung.com/java-palindrome)
-- [Comparing Strings in Java](http://www.baeldung.com/java-compare-strings)
 - [Guide to Inheritance in Java](http://www.baeldung.com/java-inheritance)
 - [Guide to Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)
 - [Object Type Casting in Java](http://www.baeldung.com/java-type-casting)
 - [A Practical Guide to DecimalFormat](http://www.baeldung.com/java-decimalformat)
 - [How to Detect the OS Using Java](http://www.baeldung.com/java-detect-os)
 - [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
-- [An Advanced Tagging Implementation with JPA](http://www.baeldung.com/jpa-tagging-advanced)
 - [Handling Daylight Savings Time in Java](http://www.baeldung.com/java-daylight-savings)
 - [Inheritance and Composition (Is-a vs Has-a relationship) in Java](http://www.baeldung.com/java-inheritance-composition)
 - [Finding Max/Min of a List or Collection](http://www.baeldung.com/java-collection-min-max)
@@ -139,11 +121,9 @@
 - [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
 - [Using Java Assertions](http://www.baeldung.com/java-assert)
 - [Pass-By-Value as a Parameter Passing Mechanism in Java](http://www.baeldung.com/java-pass-by-value-or-pass-by-reference)
-- [Check If a String Is Numeric in Java](http://www.baeldung.com/java-check-string-number)
 - [Variable and Method Hiding in Java](http://www.baeldung.com/java-variable-method-hiding)
 - [Access Modifiers in Java](http://www.baeldung.com/java-access-modifiers)
 - [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
-- [Why Use char[] Array Over a String for Storing Passwords in Java?](http://www.baeldung.com/java-storing-passwords)
 - [Introduction to Creational Design Patterns](http://www.baeldung.com/creational-design-patterns)
 - [Proxy, Decorator, Adapter and Bridge Patterns](http://www.baeldung.com/java-structural-design-patterns)
 - [Singletons in Java](http://www.baeldung.com/java-singleton)
@@ -157,7 +137,6 @@
 - [Importance of Main Manifest Attribute in a Self-Executing JAR](http://www.baeldung.com/java-jar-executable-manifest-main-class)
 - [Extracting Year, Month and Day from Date in Java](http://www.baeldung.com/java-year-month-day)
 - [Get Date Without Time in Java](http://www.baeldung.com/java-date-without-time)
-- [Convert a String to Title Case](http://www.baeldung.com/java-string-title-case)
 - [How to Get the File Extension of a File in Java](http://www.baeldung.com/java-file-extension)
 - [Immutable Objects in Java](http://www.baeldung.com/java-immutable-object)
 - [Console I/O in Java](http://www.baeldung.com/java-console-input-output)
@@ -171,3 +150,4 @@
 - [Guide to Java Instrumentation](http://www.baeldung.com/java-instrumentation)
 - [Getting a File’s Mime Type in Java](http://www.baeldung.com/java-file-mime-type)
 - [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)
+- [Java Constructors vs Static Factory Methods](https://www.baeldung.com/java-constructors-vs-static-factory-methods)

core-java/pom.xml

@@ -127,11 +127,6 @@
             <artifactId>spring-web</artifactId>
             <version>${springframework.spring-web.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter</artifactId>
-            <version>${springframework.boot.spring-boot-starter.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -142,11 +137,6 @@
             <artifactId>mail</artifactId>
             <version>${javax.mail.version}</version>
         </dependency>
-        <dependency>
-            <groupId>com.ibm.icu</groupId>
-            <artifactId>icu4j</artifactId>
-            <version>${icu4j.version}</version>
-        </dependency>
         <!-- Mime Type Resolution Libraries -->
         <dependency>
             <groupId>org.apache.tika</groupId>
@@ -530,9 +520,8 @@
         <assertj-core.version>3.10.0</assertj-core.version>
 
         <!-- maven plugins -->
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+        <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
         <springframework.spring-web.version>4.3.4.RELEASE</springframework.spring-web.version>
-        <springframework.boot.spring-boot-starter.version>1.5.8.RELEASE</springframework.boot.spring-boot-starter.version>
         
         <javamoney.moneta.version>1.1</javamoney.moneta.version>
         <h2database.version>1.4.197</h2database.version>

core-java/src/main/java/com/baeldung/binding/Animal.java

@@ -0,0 +1,23 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class Animal {
+
+    final static Logger logger = LoggerFactory.getLogger(Animal.class);
+
+    public void makeNoise() {
+        logger.info("generic animal noise");
+    }
+
+    public void makeNoise(Integer repetitions) {
+        while(repetitions != 0) {
+            logger.info("generic animal noise countdown " + repetitions);
+            repetitions -= 1;
+        }
+    }
+}

core-java/src/main/java/com/baeldung/binding/AnimalActivity.java

@@ -0,0 +1,43 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class AnimalActivity {
+
+    final static Logger logger = LoggerFactory.getLogger(AnimalActivity.class);
+
+
+    public static void sleep(Animal animal) {
+        logger.info("Animal is sleeping");
+    }
+
+    public static void sleep(Cat cat) {
+        logger.info("Cat is sleeping");
+    }
+
+    public static void main(String[] args) {
+
+        Animal animal = new Animal();
+
+        //calling methods of animal object
+        animal.makeNoise();
+
+        animal.makeNoise(3);
+
+
+        //assigning a dog object to reference of type Animal
+        Animal catAnimal = new Cat();
+
+        catAnimal.makeNoise();
+
+        // calling static function
+        AnimalActivity.sleep(catAnimal);
+
+        return;
+
+    }
+}

core-java/src/main/java/com/baeldung/binding/Cat.java

@@ -0,0 +1,18 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class Cat extends Animal {
+
+    final static Logger logger = LoggerFactory.getLogger(Cat.class);
+
+    public void makeNoise() {
+
+        logger.info("meow");
+    }
+
+}

core-java/src/main/java/com/baeldung/constructorsstaticfactorymethods/application/Application.java

@@ -0,0 +1,12 @@
+package com.baeldung.constructorsstaticfactorymethods.application;
+
+import com.baeldung.constructorsstaticfactorymethods.entities.User;
+ 
+public class Application {
+
+    public static void main(String[] args) {
+        User user1 = User.createWithDefaultCountry("John", "john@domain.com");
+        User user2 = User.createWithLoggedInstantiationTime("John", "john@domain.com", "Argentina");
+        User user3 = User.getSingletonInstance("John", "john@domain.com", "Argentina");
+    }
+}