Merge branch 'master' of https://github.com/eugenp/tutorials

algorithms-searching/README.md

@@ -10,3 +10,4 @@ This module contains articles about searching algorithms.
 - [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
 - [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
 - [Range Search Algorithm in Java](https://www.baeldung.com/java-range-search)
+- [Fast Pattern Matching of Strings Using Suffix Tree](https://www.baeldung.com/java-pattern-matching-suffix-tree)

apache-beam/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Introduction to Apache Beam](https://www.baeldung.com/apache-beam)

core-java-modules/core-java-14/README.md

@@ -5,3 +5,5 @@ This module contains articles about Java 14.
 ### Relevant articles
 
 - [Guide to the @Serial Annotation in Java 14](https://www.baeldung.com/java-14-serial-annotation)
+- [Java Text Blocks](https://www.baeldung.com/java-text-blocks)
+- [Pattern Matching for instanceof in Java 14](https://www.baeldung.com/java-pattern-matching-instanceof)

core-java-modules/core-java-9-improvements/README.md

@@ -9,8 +9,3 @@ This module contains articles about the improvements to core Java features intro
 - [Java 9 Stream API Improvements](https://www.baeldung.com/java-9-stream-api)
 - [Java 9 java.util.Objects Additions](https://www.baeldung.com/java-9-objects-new)
 - [Java 9 CompletableFuture API Improvements](https://www.baeldung.com/java-9-completablefuture)
-
-#### Relevant articles not in this module:
-
-- [Java 9 Process API Improvements](https://www.baeldung.com/java-9-process-api) (see the [core-java-os](/core-java-os) module)
-

core-java-modules/core-java-arrays-3/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Arrays.deepEquals](https://www.baeldung.com/java-arrays-deepequals)

core-java-modules/core-java-exceptions-2/README.md

@@ -7,3 +7,5 @@ This module contains articles about core java exceptions
 - [Is It a Bad Practice to Catch Throwable?](https://www.baeldung.com/java-catch-throwable-bad-practice)
 - [Wrapping vs Rethrowing Exceptions in Java](https://www.baeldung.com/java-wrapping-vs-rethrowing-exceptions)
 - [java.net.UnknownHostException: Invalid Hostname for Server](https://www.baeldung.com/java-unknownhostexception)
+- [How to Handle Java SocketException](https://www.baeldung.com/java-socketexception)
+- [Java Suppressed Exceptions](https://www.baeldung.com/java-suppressed-exceptions)

core-java-modules/core-java-io-2/pom.xml

@@ -47,6 +47,14 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/com.github.tomakehurst/wiremock -->
+        <dependency>
+            <groupId>com.github.tomakehurst</groupId>
+            <artifactId>wiremock</artifactId>
+            <version>2.26.3</version>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
     <build>

core-java-modules/core-java-io-2/src/test/java/com/baeldung/blockingnonblocking/BlockingClientUnitTest.java

@@ -0,0 +1,52 @@
+package com.baeldung.blockingnonblocking;
+
+import com.github.tomakehurst.wiremock.junit.WireMockRule;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+
+import java.io.*;
+import java.net.Socket;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.*;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig;
+import static org.junit.Assert.assertTrue;
+
+public class BlockingClientUnitTest {
+    private static final String REQUESTED_RESOURCE = "/test.json";
+
+    @Rule public WireMockRule wireMockRule = new WireMockRule(wireMockConfig().dynamicPort());
+
+    @Before
+    public void setup() {
+        stubFor(get(urlEqualTo(REQUESTED_RESOURCE)).willReturn(aResponse()
+          .withStatus(200)
+          .withBody("{ \"response\" : \"It worked!\" }\r\n\r\n")));
+    }
+
+    @Test
+    public void givenJavaIOSocket_whenReadingAndWritingWithStreams_thenSuccess() throws IOException {
+        // given an IO socket and somewhere to store our result
+        Socket socket = new Socket("localhost", wireMockRule.port());
+        StringBuilder ourStore = new StringBuilder();
+
+        // when we write and read (using try-with-resources so our resources are auto-closed)
+        try (InputStream serverInput = socket.getInputStream();
+          BufferedReader reader = new BufferedReader(new InputStreamReader(serverInput));
+          OutputStream clientOutput = socket.getOutputStream();
+          PrintWriter writer = new PrintWriter(new OutputStreamWriter(clientOutput))) {
+            writer.print("GET " + REQUESTED_RESOURCE + " HTTP/1.0\r\n\r\n");
+            writer.flush(); // important - without this the request is never sent, and the test will hang on readLine()
+
+            for (String line; (line = reader.readLine()) != null; ) {
+                ourStore.append(line);
+                ourStore.append(System.lineSeparator());
+            }
+        }
+
+        // then we read and saved our data
+        assertTrue(ourStore
+          .toString()
+          .contains("It worked!"));
+    }
+}

core-java-modules/core-java-io-2/src/test/java/com/baeldung/blockingnonblocking/NonBlockingClientUnitTest.java

@@ -0,0 +1,94 @@
+package com.baeldung.blockingnonblocking;
+
+import com.github.tomakehurst.wiremock.junit.WireMockRule;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.channels.SocketChannel;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.StandardCharsets;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.*;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig;
+import static org.junit.Assert.assertTrue;
+
+public class NonBlockingClientUnitTest {
+    private String REQUESTED_RESOURCE = "/test.json";
+
+    @Rule public WireMockRule wireMockRule = new WireMockRule(wireMockConfig().dynamicPort());
+
+    @Before
+    public void setup() {
+        stubFor(get(urlEqualTo(REQUESTED_RESOURCE)).willReturn(aResponse()
+          .withStatus(200)
+          .withBody("{ \"response\" : \"It worked!\" }")));
+    }
+
+    @Test
+    public void givenJavaNIOSocketChannel_whenReadingAndWritingWithBuffers_thenSuccess() throws IOException {
+        // given a NIO SocketChannel and a charset
+        InetSocketAddress address = new InetSocketAddress("localhost", wireMockRule.port());
+        SocketChannel socketChannel = SocketChannel.open(address);
+        Charset charset = StandardCharsets.UTF_8;
+
+        // when we write and read using buffers
+        socketChannel.write(charset.encode(CharBuffer.wrap("GET " + REQUESTED_RESOURCE + " HTTP/1.0\r\n\r\n")));
+
+        ByteBuffer byteBuffer = ByteBuffer.allocate(8192); // or allocateDirect if we need direct memory access
+        CharBuffer charBuffer = CharBuffer.allocate(8192);
+        CharsetDecoder charsetDecoder = charset.newDecoder();
+        StringBuilder ourStore = new StringBuilder();
+        while (socketChannel.read(byteBuffer) != -1 || byteBuffer.position() > 0) {
+            byteBuffer.flip();
+            storeBufferContents(byteBuffer, charBuffer, charsetDecoder, ourStore);
+            byteBuffer.compact();
+        }
+        socketChannel.close();
+
+        // then we read and saved our data
+        assertTrue(ourStore
+          .toString()
+          .contains("It worked!"));
+    }
+
+    @Test
+    public void givenJavaNIOSocketChannel_whenReadingAndWritingWithSmallBuffers_thenSuccess() throws IOException {
+        // given a NIO SocketChannel and a charset
+        InetSocketAddress address = new InetSocketAddress("localhost", wireMockRule.port());
+        SocketChannel socketChannel = SocketChannel.open(address);
+        Charset charset = StandardCharsets.UTF_8;
+
+        // when we write and read using buffers that are too small for our message
+        socketChannel.write(charset.encode(CharBuffer.wrap("GET " + REQUESTED_RESOURCE + " HTTP/1.0\r\n\r\n")));
+
+        ByteBuffer byteBuffer = ByteBuffer.allocate(8); // or allocateDirect if we need direct memory access
+        CharBuffer charBuffer = CharBuffer.allocate(8);
+        CharsetDecoder charsetDecoder = charset.newDecoder();
+        StringBuilder ourStore = new StringBuilder();
+        while (socketChannel.read(byteBuffer) != -1 || byteBuffer.position() > 0) {
+            byteBuffer.flip();
+            storeBufferContents(byteBuffer, charBuffer, charsetDecoder, ourStore);
+            byteBuffer.compact();
+        }
+        socketChannel.close();
+
+        // then we read and saved our data
+        assertTrue(ourStore
+          .toString()
+          .contains("It worked!"));
+    }
+
+    void storeBufferContents(ByteBuffer byteBuffer, CharBuffer charBuffer, CharsetDecoder charsetDecoder, StringBuilder ourStore) {
+        charsetDecoder.decode(byteBuffer, charBuffer, true);
+        charBuffer.flip();
+        ourStore.append(charBuffer);
+        charBuffer.clear();
+    }
+
+}

core-java-modules/core-java-lang-2/README.md

@@ -9,4 +9,5 @@ This module contains articles about core features in the Java language
 - [Java Default Parameters Using Method Overloading](https://www.baeldung.com/java-default-parameters-method-overloading)
 - [How to Return Multiple Values From a Java Method](https://www.baeldung.com/java-method-return-multiple-values)
 - [Guide to the Java finally Keyword](https://www.baeldung.com/java-finally-keyword)
+- [The Java Headless Mode](https://www.baeldung.com/java-headless-mode)
 - [[<-- Prev]](/core-java-modules/core-java-lang)

core-java-modules/core-java-nio-2/README.md

@@ -8,4 +8,5 @@ This module contains articles about core Java non-blocking input and output (IO)
 - [Create a Symbolic Link with Java](https://www.baeldung.com/java-symlink)
 - [Introduction to the Java NIO Selector](https://www.baeldung.com/java-nio-selector)
 - [Using Java MappedByteBuffer](https://www.baeldung.com/java-mapped-byte-buffer)
-- [[<-- Prev]](/core-java-modules/core-java-nio)
+- [How to Lock a File in Java](https://www.baeldung.com/java-lock-files)
+- [[<-- Prev]](/core-java-modules/core-java-nio)

core-java-modules/core-java-perf/README.md

@@ -10,3 +10,4 @@ This module contains articles about performance of Java applications
 - [Basic Introduction to JMX](http://www.baeldung.com/java-management-extensions)
 - [Monitoring Java Applications with Flight Recorder](https://www.baeldung.com/java-flight-recorder-monitoring)
 - [Branch Prediction in Java](https://www.baeldung.com/java-branch-prediction)
+- [Capturing a Java Thread Dump](https://www.baeldung.com/java-thread-dump)

core-java-modules/core-java-regex/README.md

@@ -8,3 +8,4 @@
 - [Guide to Escaping Characters in Java RegExps](http://www.baeldung.com/java-regexp-escape-char)
 - [Pre-compile Regex Patterns Into Pattern Objects](https://www.baeldung.com/java-regex-pre-compile)
 - [Difference Between Java Matcher find() and matches()](https://www.baeldung.com/java-matcher-find-vs-matches)
+- [How to Use Regular Expressions to Replace Tokens in Strings](https://www.baeldung.com/java-regex-token-replacement)

core-java-modules/core-java-security-2/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Guide To The Java Authentication And Authorization Service (JAAS)](https://www.baeldung.com/java-authentication-authorization-service)

core-java-modules/core-java-string-operations-2/README.md

@@ -10,4 +10,5 @@ This module contains articles about string operations.
 - [Java String equalsIgnoreCase()](https://www.baeldung.com/java-string-equalsignorecase)
 - [Case-Insensitive String Matching in Java](https://www.baeldung.com/java-case-insensitive-string-matching)
 - [L-Trim and R-Trim in Java](https://www.baeldung.com/l-trim-and-r-trim-in-java)
+- [L-Trim and R-Trim Alternatives in Java](https://www.baeldung.com/java-trim-alternatives)
 - More articles: [[<-- prev]](../core-java-string-operations)

custom-pmd/README.md

@@ -1,7 +1,3 @@
 ## Custom PMD Rules
 
 This module contains articles about PMD
-
-### Relevant Articles:
-
-- [Introduction To PMD](https://www.baeldung.com/pmd)

data-structures/README.md

@@ -9,3 +9,4 @@ This module contains articles about data structures in Java
 - [Circular Linked List Java Implementation](https://www.baeldung.com/java-circular-linked-list)
 - [How to Print a Binary Tree Diagram](https://www.baeldung.com/java-print-binary-tree-diagram)
 - [Introduction to Big Queue](https://www.baeldung.com/java-big-queue)
+- [Guide to AVL Trees in Java](https://www.baeldung.com/java-avl-trees)

ddd-modules/README.md

@@ -1 +1,3 @@
-## Relevant Articles
+### Relevant Articles:
+
+- [DDD Bounded Contexts and Java Modules](https://www.baeldung.com/java-modules-ddd-bounded-contexts)

ddd/README.md

@@ -6,5 +6,4 @@ This module contains articles about Domain-driven Design (DDD)
 
 - [Persisting DDD Aggregates](https://www.baeldung.com/spring-persisting-ddd-aggregates)
 - [Double Dispatch in DDD](https://www.baeldung.com/ddd-double-dispatch)
-- [DDD Aggregates and @DomainEvents](https://www.baeldung.com/spring-data-ddd)
 - [Organizing Layers Using Hexagonal Architecture, DDD, and Spring](https://www.baeldung.com/hexagonal-architecture-ddd-spring)

gradle-6/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [What’s New in Gradle 6.0](https://www.baeldung.com/gradle-6-features)

gradle/gradle-to-maven/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Converting Gradle Build File to Maven POM](https://www.baeldung.com/gradle-build-to-maven-pom)

gson/README.md

@@ -13,4 +13,4 @@ This module contains articles about Gson
 - [Convert String to JsonObject with Gson](https://www.baeldung.com/gson-string-to-jsonobject)
 - [Mapping Multiple JSON Fields to a Single Java Field](https://www.baeldung.com/json-multiple-fields-single-java-field)
 - [Serializing and Deserializing a List with Gson](https://www.baeldung.com/gson-list)
-
+- [Compare Two JSON Objects with Gson](https://www.baeldung.com/gson-compare-json-objects)

image-processing/README.md

@@ -4,3 +4,5 @@ This module contains articles about image processing.
 
 ### Relevant Articles:
 - [Working with Images in Java](https://www.baeldung.com/java-images)
+- [Intro to OpenCV with Java](https://www.baeldung.com/java-opencv)
+- [Optical Character Recognition with Tesseract](https://www.baeldung.com/java-ocr-tesseract)

java-numbers-3/README.md

@@ -2,3 +2,4 @@
 
 - [Generating Random Numbers](https://www.baeldung.com/java-generating-random-numbers)
 - [Convert Double to Long in Java](https://www.baeldung.com/java-convert-double-long)
+- [Check for null Before Calling Parse in Double.parseDouble](https://www.baeldung.com/java-check-null-parse-double)

jee-7/src/test/java/com/baeldung/batch/understanding/CustomCheckPointUnitTest.java

@@ -12,7 +12,9 @@ import javax.batch.runtime.StepExecution;
 import com.baeldung.batch.understanding.BatchTestHelper;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Disabled;
 
+@Disabled("Should be fixed in BAEL-3812")
 class CustomCheckPointUnitTest {
     @Test
     public void givenChunk_whenCustomCheckPoint_thenCommitCountIsThree() throws Exception {

jee-7/src/test/java/com/baeldung/batch/understanding/JobSequenceUnitTest.java

@@ -13,7 +13,9 @@ import javax.batch.runtime.JobExecution;
 import javax.batch.runtime.StepExecution;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Disabled;
 
+@Disabled("Should be fixed in BAEL-3812")
 class JobSequenceUnitTest {
     @Test
     public void givenTwoSteps_thenBatch_CompleteWithSuccess() throws Exception {

jee-7/src/test/java/com/baeldung/batch/understanding/SimpleChunkUnitTest.java

@@ -14,7 +14,9 @@ import javax.batch.runtime.Metric;
 import javax.batch.runtime.StepExecution;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Disabled;
 
+@Disabled("Should be fixed in BAEL-3812")
 class SimpleChunkUnitTest {
     @Test
     public void givenChunk_thenBatch_CompletesWithSucess() throws Exception {

jhipster-5/bookstore-monolith/pom.xml

@@ -7,6 +7,12 @@
     <version>0.0.1-SNAPSHOT</version>
     <packaging>war</packaging>
     <name>Bookstore</name>
+    
+    <parent>
+        <artifactId>jhipster-5</artifactId>
+        <groupId>com.baeldung.jhipster</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
 
     <repositories>
         <!-- jhipster-needle-maven-repository -->

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/config/WebConfigurerUnitTest.java

@@ -37,7 +37,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  *
  * @see WebConfigurer
  */
-public class WebConfigurerTest {
+public class WebConfigurerUnitTest {
 
     private WebConfigurer webConfigurer;
 
@@ -116,7 +116,7 @@ public class WebConfigurerTest {
         props.getCors().setMaxAge(1800L);
         props.getCors().setAllowCredentials(true);
 
-        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerTestController())
+        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerUnitTestController())
             .addFilters(webConfigurer.corsFilter())
             .build();
 
@@ -146,7 +146,7 @@ public class WebConfigurerTest {
         props.getCors().setMaxAge(1800L);
         props.getCors().setAllowCredentials(true);
 
-        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerTestController())
+        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerUnitTestController())
             .addFilters(webConfigurer.corsFilter())
             .build();
 
@@ -161,7 +161,7 @@ public class WebConfigurerTest {
     public void testCorsFilterDeactivated() throws Exception {
         props.getCors().setAllowedOrigins(null);
 
-        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerTestController())
+        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerUnitTestController())
             .addFilters(webConfigurer.corsFilter())
             .build();
 
@@ -176,7 +176,7 @@ public class WebConfigurerTest {
     public void testCorsFilterDeactivated2() throws Exception {
         props.getCors().setAllowedOrigins(new ArrayList<>());
 
-        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerTestController())
+        MockMvc mockMvc = MockMvcBuilders.standaloneSetup(new WebConfigurerUnitTestController())
             .addFilters(webConfigurer.corsFilter())
             .build();
 

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/config/WebConfigurerUnitTestController.java

@@ -4,7 +4,7 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
-public class WebConfigurerTestController {
+public class WebConfigurerUnitTestController {
 
     @GetMapping("/api/test-cors")
     public void testCorsOnApiPath() {

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/repository/CustomAuditEventRepositoryIntegrationTest.java

@@ -33,7 +33,7 @@ import static com.baeldung.jhipster5.repository.CustomAuditEventRepository.EVENT
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
 @Transactional
-public class CustomAuditEventRepositoryIntTest {
+public class CustomAuditEventRepositoryIntegrationTest {
 
     @Autowired
     private PersistenceAuditEventRepository persistenceAuditEventRepository;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/security/DomainUserDetailsServiceIntegrationTest.java

@@ -28,7 +28,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
 @Transactional
-public class DomainUserDetailsServiceIntTest {
+public class DomainUserDetailsServiceIntegrationTest {
 
     private static final String USER_ONE_LOGIN = "test-user-one";
     private static final String USER_ONE_EMAIL = "test-user-one@localhost";

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/security/jwt/JWTFilterUnitTest.java

@@ -20,7 +20,7 @@ import java.util.Collections;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class JWTFilterTest {
+public class JWTFilterUnitTest {
 
     private TokenProvider tokenProvider;
 

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/security/jwt/TokenProviderUnitTest.java

@@ -22,7 +22,7 @@ import io.jsonwebtoken.security.Keys;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class TokenProviderTest {
+public class TokenProviderUnitTest {
 
     private final long ONE_MINUTE = 60000;
     private Key key;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/service/MailServiceIntegrationTest.java

@@ -31,7 +31,7 @@ import static org.mockito.Mockito.*;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class MailServiceIntTest {
+public class MailServiceIntegrationTest {
 
     @Autowired
     private JHipsterProperties jHipsterProperties;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/service/UserServiceIntegrationTest.java

@@ -38,7 +38,7 @@ import static org.mockito.Mockito.when;
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
 @Transactional
-public class UserServiceIntTest {
+public class UserServiceIntegrationTest {
 
     @Autowired
     private UserRepository userRepository;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/service/mapper/UserMapperUnitTest.java

@@ -26,7 +26,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class UserMapperTest {
+public class UserMapperUnitTest {
 
     private static final String DEFAULT_LOGIN = "johndoe";
 

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/AccountResourceIntegrationTest.java

@@ -49,7 +49,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class AccountResourceIntTest {
+public class AccountResourceIntegrationTest {
 
     @Autowired
     private UserRepository userRepository;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/AuditResourceIntegrationTest.java

@@ -35,7 +35,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
 @Transactional
-public class AuditResourceIntTest {
+public class AuditResourceIntegrationTest {
 
     private static final String SAMPLE_PRINCIPAL = "SAMPLE_PRINCIPAL";
     private static final String SAMPLE_TYPE = "SAMPLE_TYPE";

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/BookResourceIntegrationTest.java

@@ -43,7 +43,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class BookResourceIntTest {
+public class BookResourceIntegrationTest {
 
     private static final String DEFAULT_TITLE = "AAAAAAAAAA";
     private static final String UPDATED_TITLE = "BBBBBBBBBB";

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/LogsResourceIntegrationTest.java

@@ -27,7 +27,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class LogsResourceIntTest {
+public class LogsResourceIntegrationTest {
 
     private MockMvc restLogsMockMvc;
 

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/UserJWTControllerIntegrationTest.java

@@ -33,7 +33,7 @@ import static org.hamcrest.Matchers.not;
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class UserJWTControllerIntTest {
+public class UserJWTControllerIntegrationTest {
 
     @Autowired
     private TokenProvider tokenProvider;

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/UserResourceIntegrationTest.java

@@ -42,7 +42,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class UserResourceIntTest {
+public class UserResourceIntegrationTest {
 
     private static final String DEFAULT_LOGIN = "johndoe";
     private static final String UPDATED_LOGIN = "jhipster";

jhipster-5/bookstore-monolith/src/test/java/com/baeldung/jhipster5/web/rest/errors/ExceptionTranslatorIntegrationTest.java

@@ -25,7 +25,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = BookstoreApp.class)
-public class ExceptionTranslatorIntTest {
+public class ExceptionTranslatorIntegrationTest {
 
     @Autowired
     private ExceptionTranslatorTestController controller;

json-2/README.md

@@ -4,3 +4,4 @@ This module contains articles about JSON.
 
 ### Relevant Articles:
 - [Introduction to Jsoniter](https://www.baeldung.com/java-jsoniter)
+- [Introduction to Moshi Json](https://www.baeldung.com/java-json-moshi)

json-2/pom.xml

@@ -33,9 +33,26 @@
             <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
+
+        <dependency>
+            <groupId>com.squareup.moshi</groupId>
+            <artifactId>moshi</artifactId>
+            <version>${moshi.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.squareup.moshi</groupId>
+            <artifactId>moshi-adapters</artifactId>
+            <version>${moshi.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.9</version>
+        </dependency>
     </dependencies>
     <properties>
         <jsoniter.version>0.9.23</jsoniter.version>
         <assertj-core.version>3.11.1</assertj-core.version>
+        <moshi.version>1.9.2</moshi.version>
     </properties>
 </project>

kotlin-libraries-2/src/test/kotlin/com/baeldung/fuel/FuelHttpLiveTest.kt

@@ -12,7 +12,11 @@ import org.junit.jupiter.api.Test
 import java.io.File
 import java.util.concurrent.CountDownLatch
 
-internal class FuelHttpUnitTest {
+/**
+ * These live tests make connections to the external systems: http://httpbin.org, https://jsonplaceholder.typicode.com
+ * Make sure these hosts are up and your internet connection is on before running the tests.
+ */
+internal class FuelHttpLiveTest {
 
     @Test
     fun whenMakingAsyncHttpGetRequest_thenResponseNotNullAndErrorNullAndStatusCode200() {

libraries-3/README.md

@@ -12,3 +12,5 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Guide to the Cactoos Library](https://www.baeldung.com/java-cactoos)
 - [Parsing Command-Line Parameters with Airline](https://www.baeldung.com/java-airline)
 - [Introduction to cache2k](https://www.baeldung.com/java-cache2k)
+- [Introduction to the jcabi-aspects AOP Annotations Library](https://www.baeldung.com/java-jcabi-aspects)
+- [Introduction to Takes](https://www.baeldung.com/java-takes)

libraries-3/pom.xml

@@ -73,16 +73,6 @@
             <version>${cache2k.version}</version>
             <type>pom</type>
         </dependency>
-        <dependency>
-            <groupId>com.squareup.moshi</groupId>
-            <artifactId>moshi</artifactId>
-            <version>${moshi.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.squareup.moshi</groupId>
-            <artifactId>moshi-adapters</artifactId>
-            <version>${moshi.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.jcabi</groupId>
             <artifactId>jcabi-aspects</artifactId>
@@ -201,7 +191,6 @@
         <cactoos.version>0.43</cactoos.version>
         <airline.version>2.7.2</airline.version>
         <cache2k.version>1.2.3.Final</cache2k.version>
-        <moshi.version>1.9.2</moshi.version>
         <jcabi-aspects.version>0.22.6</jcabi-aspects.version>
         <aspectjrt.version>1.9.2</aspectjrt.version>
         <jcabi-maven-plugin.version>0.14.1</jcabi-maven-plugin.version>

libraries-3/src/main/java/com/baeldung/arthas/FibonacciGenerator.java

@@ -0,0 +1,25 @@
+package com.baeldung.arthas;
+
+import java.io.IOException;
+
+import static java.lang.String.format;
+
+public class FibonacciGenerator {
+
+    public static void main(String[] args) throws IOException {
+        System.out.println("Press a key to continue");
+        System.in.read();
+        for (int i = 0; i < 100; i++) {
+            long result = fibonacci(i);
+            System.out.println(format("fib(%d): %d", i, result));
+        }
+    }
+
+    public static long fibonacci(int n) {
+        if (n == 0 || n == 1) {
+            return 1L;
+        } else {
+            return fibonacci(n - 1) + fibonacci(n - 2);
+        }
+    }
+}

libraries-data-io/README.md

@@ -9,3 +9,4 @@ This module contains articles about IO data processing libraries.
 - [Introduction To OpenCSV](https://www.baeldung.com/opencsv)
 - [Interact with Google Sheets from Java](https://www.baeldung.com/google-sheets-java-client)
 - [Introduction To Docx4J](https://www.baeldung.com/docx4j)
+- [Breaking YAML Strings Over Multiple Lines](https://www.baeldung.com/yaml-multi-line)

libraries/README.md

@@ -45,4 +45,5 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Implementing a FTP-Client in Java](https://www.baeldung.com/java-ftp-client)
 - [Introduction to Functional Java](https://www.baeldung.com/java-functional-library)
 - [A Guide to the Reflections Library](https://www.baeldung.com/reflections-library)
+- [Using NullAway to Avoid NullPointerExceptions](https://www.baeldung.com/java-nullaway)
 - More articles [[next -->]](/libraries-2)

open-liberty/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Introduction to Open Liberty](https://www.baeldung.com/java-open-liberty)

parent-kotlin/pom.xml

@@ -31,7 +31,7 @@
         <repository>
             <id>spring-milestone</id>
             <name>Spring Milestone Repository</name>
-            <url>http://repo.spring.io/milestone</url>
+            <url>https://repo.spring.io/milestone</url>
         </repository>
     </repositories>
 

patterns/design-patterns-creational/src/main/java/com/baeldung/constructorsstaticfactorymethods/entities/User.java

@@ -19,8 +19,8 @@ public class User {
     }
 
     public static User createWithLoggedInstantiationTime(String name, String email, String country) {
-        setLoggerProperties();
         LOGGER.log(Level.INFO, "Creating User instance at : {0}", LocalTime.now());
+
         return new User(name, email, country);
     }
 
@@ -53,11 +53,4 @@ public class User {
     public String getCountry() {
         return country;
     }
-    
-    private static void setLoggerProperties() {
-        ConsoleHandler handler = new ConsoleHandler();
-        handler.setLevel(Level.INFO);
-        handler.setFormatter(new SimpleFormatter());
-        LOGGER.addHandler(handler);
-    }
 }

persistence-modules/java-mongodb/README.md

@@ -9,3 +9,4 @@ This module contains articles about MongoDB in Java.
 - [MongoDB BSON Guide](https://www.baeldung.com/mongodb-bson)
 - [Geospatial Support in MongoDB](https://www.baeldung.com/mongodb-geospatial-support)
 - [Introduction to Morphia – Java ODM for MongoDB](https://www.baeldung.com/mongodb-morphia)
+- [MongoDB Aggregations Using Java](https://www.baeldung.com/java-mongodb-aggregations)

persistence-modules/spring-boot-persistence-h2/pom.xml

@@ -29,12 +29,30 @@
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.vladmihalcea</groupId>
+            <artifactId>db-util</artifactId>
+            <version>${db-util.version}</version>
+        </dependency>
     </dependencies>
 
     <properties>
         <!-- The main class to start by executing java -jar -->
         <start-class>com.baeldung.h2db.demo.server.SpringBootApp</start-class>
         <spring-boot.version>2.0.4.RELEASE</spring-boot.version>
+        <hibernate.version>5.3.11.Final</hibernate.version>
+        <db-util.version>1.0.4</db-util.version>
     </properties>
 
 </project>

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/LazyLoadNoTransSpringBootApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.h2db.lazy_load_no_trans;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@SpringBootApplication
+@EnableTransactionManagement
+public class LazyLoadNoTransSpringBootApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(LazyLoadNoTransSpringBootApplication.class, args);
+    }
+}

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/config/DatasourceProxyBeanPostProcessor.java

@@ -0,0 +1,67 @@
+package com.baeldung.h2db.lazy_load_no_trans.config;
+
+import net.ttddyy.dsproxy.listener.DataSourceQueryCountListener;
+import net.ttddyy.dsproxy.listener.logging.CommonsQueryLoggingListener;
+import net.ttddyy.dsproxy.listener.logging.DefaultQueryLogEntryCreator;
+import net.ttddyy.dsproxy.listener.logging.SLF4JLogLevel;
+import net.ttddyy.dsproxy.listener.logging.SLF4JQueryLoggingListener;
+import net.ttddyy.dsproxy.support.ProxyDataSource;
+import net.ttddyy.dsproxy.support.ProxyDataSourceBuilder;
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+import org.springframework.aop.framework.ProxyFactory;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.stereotype.Component;
+import org.springframework.util.ReflectionUtils;
+
+import javax.sql.DataSource;
+import java.lang.reflect.Method;
+
+@Component
+public class DatasourceProxyBeanPostProcessor implements BeanPostProcessor {
+
+    @Override
+    public Object postProcessAfterInitialization(Object bean, String beanName) {
+        if (bean instanceof DataSource && !(bean instanceof ProxyDataSource)) {
+            // Instead of directly returning a less specific datasource bean
+            // (e.g.: HikariDataSource -> DataSource), return a proxy object.
+            // See following links for why:
+            //   https://stackoverflow.com/questions/44237787/how-to-use-user-defined-database-proxy-in-datajpatest
+            //   https://gitter.im/spring-projects/spring-boot?at=5983602d2723db8d5e70a904
+            //   http://blog.arnoldgalovics.com/2017/06/26/configuring-a-datasource-proxy-in-spring-boot/
+            final ProxyFactory factory = new ProxyFactory(bean);
+            factory.setProxyTargetClass(true);
+            factory.addAdvice(new ProxyDataSourceInterceptor((DataSource) bean));
+            return factory.getProxy();
+        }
+        return bean;
+    }
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, String beanName) {
+        return bean;
+    }
+
+    private static class ProxyDataSourceInterceptor implements MethodInterceptor {
+        private final DataSource dataSource;
+
+        public ProxyDataSourceInterceptor(final DataSource dataSource) {
+            this.dataSource = ProxyDataSourceBuilder.create(dataSource)
+                    .name("MyDS")
+                    .multiline()
+                    .logQueryBySlf4j(SLF4JLogLevel.INFO)
+                    .listener(new DataSourceQueryCountListener())
+                    .build();
+        }
+
+        @Override
+        public Object invoke(final MethodInvocation invocation) throws Throwable {
+            final Method proxyMethod = ReflectionUtils.findMethod(this.dataSource.getClass(),
+                    invocation.getMethod().getName());
+            if (proxyMethod != null) {
+                return proxyMethod.invoke(this.dataSource, invocation.getArguments());
+            }
+            return invocation.proceed();
+        }
+    }
+}

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/entity/Document.java

@@ -0,0 +1,26 @@
+package com.baeldung.h2db.lazy_load_no_trans.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.Immutable;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Immutable
+public class Document {
+
+    @Id
+    private Long id;
+
+    private String title;
+
+    private Long userId;
+}

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/entity/User.java

@@ -0,0 +1,37 @@
+package com.baeldung.h2db.lazy_load_no_trans.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.Fetch;
+import org.hibernate.annotations.FetchMode;
+import org.hibernate.annotations.Immutable;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Immutable
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+
+    private String comment;
+
+    @OneToMany(mappedBy = "userId")
+    @Fetch(FetchMode.SUBSELECT)
+    private List<Document> docs = new ArrayList<>();
+}

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/repository/UserRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.h2db.lazy_load_no_trans.repository;
+
+import com.baeldung.h2db.lazy_load_no_trans.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends JpaRepository<User, Long> {
+}

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/service/ServiceLayer.java

@@ -0,0 +1,34 @@
+package com.baeldung.h2db.lazy_load_no_trans.service;
+
+import com.baeldung.h2db.lazy_load_no_trans.entity.User;
+import com.baeldung.h2db.lazy_load_no_trans.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Collection;
+
+@Service
+public class ServiceLayer {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Transactional(readOnly = true)
+    public long countAllDocsTransactional() {
+        return countAllDocs();
+    }
+
+    public long countAllDocsNonTransactional() {
+        return countAllDocs();
+    }
+
+    private long countAllDocs() {
+        return userRepository.findAll()
+            .stream()
+            .map(User::getDocs)
+            .mapToLong(Collection::size)
+            .sum();
+    }
+
+}

persistence-modules/spring-boot-persistence-h2/src/main/resources/application-lazy-load-no-trans-off.properties

@@ -0,0 +1,13 @@
+spring.datasource.url=jdbc:h2:mem:mydb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.h2.console.enabled=true
+spring.h2.console.path=/h2-console
+
+logging.level.org.hibernate.SQL=INFO
+logging.level.org.hibernate.type=TRACE
+spring.jpa.properties.hibernate.validator.apply_to_ddl=false
+spring.jpa.properties.hibernate.enable_lazy_load_no_trans=false
+spring.jpa.open-in-view=false

persistence-modules/spring-boot-persistence-h2/src/main/resources/application-lazy-load-no-trans-on.properties

@@ -0,0 +1,13 @@
+spring.datasource.url=jdbc:h2:mem:mydb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.h2.console.enabled=true
+spring.h2.console.path=/h2-console
+
+logging.level.org.hibernate.SQL=INFO
+logging.level.org.hibernate.type=TRACE
+spring.jpa.properties.hibernate.validator.apply_to_ddl=false
+spring.jpa.properties.hibernate.enable_lazy_load_no_trans=true
+spring.jpa.open-in-view=false

persistence-modules/spring-boot-persistence-h2/src/main/resources/data.sql

@@ -10,4 +10,17 @@ CREATE TABLE billionaires (
 INSERT INTO billionaires (first_name, last_name, career) VALUES
 ('Aliko', 'Dangote', 'Billionaire Industrialist'),
 ('Bill', 'Gates', 'Billionaire Tech Entrepreneur'),
-('Folrunsho', 'Alakija', 'Billionaire Oil Magnate');
+('Folrunsho', 'Alakija', 'Billionaire Oil Magnate');
+
+insert into USER values (101, 'user1', 'comment1');
+insert into USER values (102, 'user2', 'comment2');
+insert into USER values (103, 'user3', 'comment3');
+insert into USER values (104, 'user4', 'comment4');
+insert into USER values (105, 'user5', 'comment5');
+
+insert into DOCUMENT values (1, 'doc1', 101);
+insert into DOCUMENT values (2, 'doc2', 101);
+insert into DOCUMENT values (3, 'doc3', 101);
+insert into DOCUMENT values (4, 'doc4', 101);
+insert into DOCUMENT values (5, 'doc5', 102);
+insert into DOCUMENT values (6, 'doc6', 102);

persistence-modules/spring-boot-persistence-h2/src/test/java/com/baeldung/lazy_load_no_trans/LazyLoadNoTransPropertyOffIntegrationTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.lazy_load_no_trans;
+
+import com.baeldung.h2db.lazy_load_no_trans.LazyLoadNoTransSpringBootApplication;
+import com.baeldung.h2db.lazy_load_no_trans.service.ServiceLayer;
+import com.vladmihalcea.sql.SQLStatementCountValidator;
+import org.hibernate.LazyInitializationException;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = LazyLoadNoTransSpringBootApplication.class)
+@ActiveProfiles("lazy-load-no-trans-off")
+public class LazyLoadNoTransPropertyOffIntegrationTest {
+
+    @Autowired
+    private ServiceLayer serviceLayer;
+
+    private static final long EXPECTED_DOCS_COLLECTION_SIZE = 6;
+
+    @Test(expected = LazyInitializationException.class)
+    public void whenCallNonTransactionalMethodWithPropertyOff_thenThrowException() {
+        serviceLayer.countAllDocsNonTransactional();
+    }
+
+    @Test
+    public void whenCallTransactionalMethodWithPropertyOff_thenTestPass() {
+        SQLStatementCountValidator.reset();
+
+        long docsCount = serviceLayer.countAllDocsTransactional();
+
+        assertEquals(EXPECTED_DOCS_COLLECTION_SIZE, docsCount);
+
+        SQLStatementCountValidator.assertSelectCount(2);
+    }
+}

persistence-modules/spring-boot-persistence-h2/src/test/java/com/baeldung/lazy_load_no_trans/LazyLoadNoTransPropertyOnIntegrationTest.java

@@ -0,0 +1,47 @@
+package com.baeldung.lazy_load_no_trans;
+
+import com.baeldung.h2db.lazy_load_no_trans.LazyLoadNoTransSpringBootApplication;
+import com.baeldung.h2db.lazy_load_no_trans.service.ServiceLayer;
+import com.vladmihalcea.sql.SQLStatementCountValidator;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = LazyLoadNoTransSpringBootApplication.class)
+@ActiveProfiles("lazy-load-no-trans-on")
+public class LazyLoadNoTransPropertyOnIntegrationTest {
+
+    @Autowired
+    private ServiceLayer serviceLayer;
+
+    private static final long EXPECTED_DOCS_COLLECTION_SIZE = 6;
+    private static final long EXPECTED_USERS_COUNT = 5;
+
+    @Test
+    public void whenCallNonTransactionalMethodWithPropertyOn_thenGetNplusOne() {
+        SQLStatementCountValidator.reset();
+
+        long docsCount = serviceLayer.countAllDocsNonTransactional();
+
+        assertEquals(EXPECTED_DOCS_COLLECTION_SIZE, docsCount);
+
+        SQLStatementCountValidator.assertSelectCount(EXPECTED_USERS_COUNT + 1);
+    }
+
+    @Test
+    public void whenCallTransactionalMethodWithPropertyOn_thenTestPass() {
+        SQLStatementCountValidator.reset();
+
+        long docsCount = serviceLayer.countAllDocsTransactional();
+
+        assertEquals(EXPECTED_DOCS_COLLECTION_SIZE, docsCount);
+
+        SQLStatementCountValidator.assertSelectCount(2);
+    }
+}

persistence-modules/spring-data-jpa-4/README.md

@@ -5,6 +5,7 @@
 - [Programmatic Transaction Management in Spring](https://www.baeldung.com/spring-programmatic-transaction-management)
 - [JPA Entity Lifecycle Events](https://www.baeldung.com/jpa-entity-lifecycle-events)
 - [Working with Lazy Element Collections in JPA](https://www.baeldung.com/java-jpa-lazy-collections)
+- [Calling Stored Procedures from Spring Data JPA Repositories](https://www.baeldung.com/spring-data-jpa-stored-procedures)
 
 ### Eclipse Config 
 After importing the project into Eclipse, you may see the following error:  

persistence-modules/spring-data-redis/README.md

@@ -4,6 +4,7 @@
 - [Introduction to Spring Data Redis](https://www.baeldung.com/spring-data-redis-tutorial)
 - [PubSub Messaging with Spring Data Redis](https://www.baeldung.com/spring-data-redis-pub-sub)
 - [An Introduction to Spring Data Redis Reactive](https://www.baeldung.com/spring-data-redis-reactive)
+- [Delete Everything in Redis](https://www.baeldung.com/redis-delete-data)
 
 ### Build the Project with Tests Running
 ```

play-framework/async-http/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Asynchronous HTTP Programming with Play Framework](https://www.baeldung.com/java-play-asynchronous-http-programming)

rxjava-core/README.md

@@ -13,5 +13,4 @@ This module contains articles about RxJava.
 - [RxJava Maybe](https://www.baeldung.com/rxjava-maybe)
 - [Combining RxJava Completables](https://www.baeldung.com/rxjava-completable)
 - [RxJava Hooks](https://www.baeldung.com/rxjava-hooks)
-- [Introduction to rxjava-jdbc](https://www.baeldung.com/rxjava-jdbc)
 - More articles: [[next -->]](/rxjava-2)

spring-5/README.md

@@ -16,3 +16,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Spring Assert Statements](https://www.baeldung.com/spring-assert)
 - [Configuring a Hikari Connection Pool with Spring Boot](https://www.baeldung.com/spring-boot-hikari)
 - [Difference between \<context:annotation-config> vs \<context:component-scan>](https://www.baeldung.com/spring-contextannotation-contextcomponentscan)
+- [Finding the Spring Version](https://www.baeldung.com/spring-find-version)

spring-amqp/README.md

@@ -7,3 +7,4 @@ This module contains articles about Spring with the AMQP messaging system
 - [Messaging With Spring AMQP](https://www.baeldung.com/spring-amqp)
 - [RabbitMQ Message Dispatching with Spring AMQP](https://www.baeldung.com/rabbitmq-spring-amqp)
 - [Error Handling with Spring AMQP](https://www.baeldung.com/spring-amqp-error-handling)
+- [Exponential Backoff With Spring AMQP](https://www.baeldung.com/spring-amqp-exponential-backoff)

spring-batch/README.md

@@ -9,3 +9,4 @@ This module contains articles about Spring Batch
 - [How to Trigger and Stop a Scheduled Spring Batch Job](https://www.baeldung.com/spring-batch-start-stop-job)
 - [Configuring Skip Logic in Spring Batch](https://www.baeldung.com/spring-batch-skip-logic)
 - [Testing a Spring Batch Job](https://www.baeldung.com/spring-batch-testing-job)
+- [Configuring Retry Logic in Spring Batch](https://www.baeldung.com/spring-batch-retry-logic)

spring-boot-modules/spring-boot-bootstrap/README.md

@@ -10,3 +10,4 @@ This module contains articles about bootstrapping Spring Boot applications.
 - [Deploy a Spring Boot Application to OpenShift](https://www.baeldung.com/spring-boot-deploy-openshift)
 - [Deploy a Spring Boot Application to AWS Beanstalk](https://www.baeldung.com/spring-boot-deploy-aws-beanstalk)
 - [Guide to @SpringBootConfiguration in Spring Boot](https://www.baeldung.com/springbootconfiguration-annotation)
+- [Implement Health Checks in OpenShift](https://www.baeldung.com/openshift-health-checks)

spring-boot-modules/spring-boot-mvc-2/README.md

@@ -6,4 +6,5 @@ This module contains articles about Spring Web MVC in Spring Boot projects.
 
 - [Functional Controllers in Spring MVC](https://www.baeldung.com/spring-mvc-functional-controllers)
 - [Specify an Array of Strings as Body Parameters in Swagger](https://www.baeldung.com/swagger-body-array-of-strings)
-- More articles: [[prev -->]](/spring-boot-mvc)
+- [Swagger @ApiParam vs @ApiModelProperty](https://www.baeldung.com/swagger-apiparam-vs-apimodelproperty)
+- More articles: [[prev -->]](/spring-boot-modules/spring-boot-mvc)

spring-boot-modules/spring-boot-mvc/README.md

@@ -10,4 +10,4 @@ This module contains articles about Spring Web MVC in Spring Boot projects.
 - [A Controller, Service and DAO Example with Spring Boot and JSF](https://www.baeldung.com/jsf-spring-boot-controller-service-dao)
 - [Setting Up Swagger 2 with a Spring REST API](https://www.baeldung.com/swagger-2-documentation-for-spring-rest-api)
 - [Using Spring ResponseEntity to Manipulate the HTTP Response](https://www.baeldung.com/spring-response-entity)
-- More articles: [[next -->]](/spring-boot-mvc-2)
+- More articles: [[next -->]](/spring-boot-modules/spring-boot-mvc-2)

spring-boot-modules/spring-boot-properties/README.md

@@ -12,3 +12,5 @@ This module contains articles about Properties in Spring Boot.
 - [Spring YAML Configuration](https://www.baeldung.com/spring-yaml)
 - [Using Spring @Value with Defaults](https://www.baeldung.com/spring-value-defaults)
 - [How to Inject a Property Value Into a Class Not Managed by Spring?](https://www.baeldung.com/inject-properties-value-non-spring-class)
+- [Add Build Properties to a Spring Boot Application](https://www.baeldung.com/spring-boot-build-properties)
+- [IntelliJ – Cannot Resolve Spring Boot Configuration Properties Error](https://www.baeldung.com/intellij-resolve-spring-boot-configuration-properties)

spring-boot-modules/spring-boot-testing/README.md

@@ -12,4 +12,5 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Exclude Auto-Configuration Classes in Spring Boot Tests](https://www.baeldung.com/spring-boot-exclude-auto-configuration-test)
 - [Setting the Log Level in Spring Boot when Testing](https://www.baeldung.com/spring-boot-testing-log-level)
 - [Embedded Redis Server with Spring Boot Test](https://www.baeldung.com/spring-embedded-redis)
+- [Testing Spring Boot @ConfigurationProperties](https://www.baeldung.com/spring-boot-testing-configurationproperties)
 - [Prevent ApplicationRunner or CommandLineRunner Beans From Executing During Junit Testing]()

spring-cloud/spring-cloud-gateway/README.md

@@ -5,3 +5,4 @@ This module contains articles about Spring Cloud Gateway
 ### Relevant Articles:
 - [Exploring the new Spring Cloud Gateway](http://www.baeldung.com/spring-cloud-gateway)
 - [Writing Custom Spring Cloud Gateway Filters](https://www.baeldung.com/spring-cloud-custom-gateway-filters)
+- [Spring Cloud Gateway Routing Predicate Factories](https://www.baeldung.com/spring-cloud-gateway-routing-predicate-factories)

spring-cloud/spring-cloud-zuul/README.md

@@ -5,3 +5,4 @@ This module contains articles about Spring with Netflix Zuul
 ### Relevant Articles:
 - [Rate Limiting in Spring Cloud Netflix Zuul](https://www.baeldung.com/spring-cloud-zuul-rate-limit)
 - [Spring REST with a Zuul Proxy](https://www.baeldung.com/spring-rest-with-zuul-proxy)
+- [Modifying the Response Body in a Zuul Filter](https://www.baeldung.com/zuul-filter-modifying-response-body)

spring-core-3/README.md

@@ -8,4 +8,6 @@ This module contains articles about core Spring functionality
 - [Guide to the Spring BeanFactory](https://www.baeldung.com/spring-beanfactory)
 - [How to use the Spring FactoryBean?](https://www.baeldung.com/spring-factorybean)
 - [Spring – Injecting Collections](https://www.baeldung.com/spring-injecting-collections)
+- [Design Patterns in the Spring Framework](https://www.baeldung.com/spring-framework-design-patterns)
+- [Injecting a Value in a Static Field in Spring](https://www.baeldung.com/spring-inject-static-field)
 - More articles: [[<-- prev]](/spring-core-2)

spring-core-3/src/main/java/com/baeldung/staticvalue/injection/Application.java

@@ -1,9 +1,12 @@
-package com.baeldung;
+package com.baeldung.staticvalue.injection;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
 
 @SpringBootApplication
+@PropertySource("/application.properties")
+
 public class Application {
 
 	public static void main(String[] args) {

spring-core-3/src/main/java/com/baeldung/staticvalue/injection/PropertyController.java

@@ -1,7 +1,6 @@
-package com.baeldung.controller;
+package com.baeldung.staticvalue.injection;
 
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.stereotype.Component;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 

spring-core-3/static-value-injection/README.md

@@ -1,22 +0,0 @@
-# Inject a value to a static field
-
-## How to run
-```sh
-mvn clean install
-mvn spring-boot:run
-```
-
-## Request
-
-**GET**
-http://localhost:8080/properties
-
-
-## Response
-```json
-[
-    "Inject a value to a static field",
-    "Inject a value to a static field",
-    null
-]
-```

spring-core-3/static-value-injection/pom.xml

@@ -1,52 +0,0 @@
-<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<parent>
-		<groupId>org.springframework.boot</groupId>
-		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.4.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
-	</parent>
-	<groupId>com.baeldung</groupId>
-	<artifactId>static.value.injection</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
-	<name>static.value.injection</name>
-	<description>Demo project for Spring Boot</description>
-
-	<properties>
-		<java.version>1.8</java.version>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-test</artifactId>
-			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>org.junit.vintage</groupId>
-					<artifactId>junit-vintage-engine</artifactId>
-				</exclusion>
-			</exclusions>
-		</dependency>
-	</dependencies>
-
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.springframework.boot</groupId>
-				<artifactId>spring-boot-maven-plugin</artifactId>
-			</plugin>
-		</plugins>
-	</build>
-
-</project>

spring-core-3/static-value-injection/src/test/java/com/baeldung/ApplicationTests.java

@@ -1,13 +0,0 @@
-package com.baeldung;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class ApplicationTests {
-
-	@Test
-	void contextLoads() {
-	}
-
-}

spring-ejb/ejb-beans/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Spring Bean vs. EJB – A Feature Comparison](https://www.baeldung.com/spring-bean-vs-ejb)

spring-mvc-java-2/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Cache Headers in Spring MVC](https://www.baeldung.com/spring-mvc-cache-headers)

spring-mvc-xml/README.md

@@ -17,6 +17,7 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [A Java Web Application Without a web.xml](https://www.baeldung.com/java-web-app-without-web-xml)
 - [Validating RequestParams and PathVariables in Spring](https://www.baeldung.com/spring-validate-requestparam-pathvariable)
 - [Debugging the Spring MVC 404 “No mapping found for HTTP request” Error](https://www.baeldung.com/spring-mvc-404-error)
+- [Getting Started with CRaSH](https://www.baeldung.com/jvm-crash-shell)
 
 ## Spring MVC with XML Configuration Example Project