Merge remote-tracking branch 'refs/remotes/eugenp/master'

apache-commons-math/pom.xml

@@ -0,0 +1,44 @@
+<?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>
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>apache-commons-math</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>3.6.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    
+</project>

apache-commons-math/src/test/java/com/baeldung/commons/math/ComplexTests.java

@@ -0,0 +1,20 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.complex.Complex;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ComplexTests {
+
+    @Test
+    public void whenComplexPow_thenCorrect() {
+        Complex first  = new Complex(1.0, 3.0);
+        Complex second = new Complex(2.0, 5.0);
+
+        Complex power = first.pow(second);
+
+        Assert.assertEquals(-0.007563724861696302, power.getReal(), 1e-7);
+        Assert.assertEquals(0.01786136835085382, power.getImaginary(), 1e-7);
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/FractionTests.java

@@ -0,0 +1,20 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.fraction.Fraction;
+import org.apache.commons.math3.fraction.FractionFormat;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class FractionTests {
+
+    @Test
+    public void whenFractionAdd_thenCorrect() {
+        Fraction lhs = new Fraction(1, 3);
+        Fraction rhs = new Fraction(2, 5);
+        Fraction sum = lhs.add(rhs);
+
+        Assert.assertEquals(11, sum.getNumerator());
+        Assert.assertEquals(15, sum.getDenominator());
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/GeometryTests.java

@@ -0,0 +1,21 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.geometry.euclidean.twod.Line;
+import org.apache.commons.math3.geometry.euclidean.twod.Vector2D;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class GeometryTests {
+
+    @Test
+    public void whenLineIntersection_thenCorrect() {
+        Line l1 = new Line(new Vector2D(0, 0), new Vector2D(1, 1), 0);
+        Line l2 = new Line(new Vector2D(0, 1), new Vector2D(1, 1.5), 0);
+
+        Vector2D intersection = l1.intersection(l2);
+
+        Assert.assertEquals(2, intersection.getX(), 1e-7);
+        Assert.assertEquals(2, intersection.getY(), 1e-7);
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/IntegrationTests.java

@@ -0,0 +1,21 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.analysis.UnivariateFunction;
+import org.apache.commons.math3.analysis.integration.SimpsonIntegrator;
+import org.apache.commons.math3.analysis.integration.UnivariateIntegrator;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class IntegrationTests {
+
+    @Test
+    public void whenUnivariateIntegratorIntegrate_thenCorrect() {
+        final UnivariateFunction function = v -> v;
+        final UnivariateIntegrator integrator = new SimpsonIntegrator(1.0e-12, 1.0e-8, 1, 32);
+
+        final double i = integrator.integrate(100, function, 0, 10);
+
+        Assert.assertEquals(16 + 2d/3d, i, 1e-7);
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/LinearAlgebraTests.java

@@ -0,0 +1,25 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.linear.*;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class LinearAlgebraTests {
+
+    @Test
+    public void whenDecompositionSolverSolve_thenCorrect() {
+        RealMatrix a =
+                new Array2DRowRealMatrix(new double[][] { { 2, 3, -2 }, { -1, 7, 6 }, { 4, -3, -5 } },
+                        false);
+        RealVector b = new ArrayRealVector(new double[] { 1, -2, 1 }, false);
+
+        DecompositionSolver solver = new LUDecomposition(a).getSolver();
+
+        RealVector solution = solver.solve(b);
+
+        Assert.assertEquals(-0.3698630137, solution.getEntry(0), 1e-7);
+        Assert.assertEquals(0.1780821918, solution.getEntry(1), 1e-7);
+        Assert.assertEquals(-0.602739726, solution.getEntry(2), 1e-7);
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/ProbabilitiesTests.java

@@ -0,0 +1,15 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.distribution.NormalDistribution;
+import org.junit.Test;
+
+public class ProbabilitiesTests {
+
+    @Test
+    public void whenNormalDistributionSample_thenSuccess() {
+        final NormalDistribution normalDistribution = new NormalDistribution(10, 3);
+
+        System.out.println(normalDistribution.sample());
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/RootFindingTests.java

@@ -0,0 +1,20 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.analysis.UnivariateFunction;
+import org.apache.commons.math3.analysis.solvers.BracketingNthOrderBrentSolver;
+import org.apache.commons.math3.analysis.solvers.UnivariateSolver;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class RootFindingTests {
+
+    @Test
+    public void whenUnivariateSolverSolver_thenCorrect() {
+        final UnivariateFunction function = v -> Math.pow(v, 2) - 2;
+        UnivariateSolver solver = new BracketingNthOrderBrentSolver(1.0e-12, 1.0e-8, 5);
+        double c = solver.solve(100, function, -10.0, 10.0, 0);
+
+        Assert.assertEquals(-Math.sqrt(2), c, 1e-7);
+    }
+
+}

apache-commons-math/src/test/java/com/baeldung/commons/math/StatisticsTests.java

@@ -0,0 +1,38 @@
+package com.baeldung.commons.math;
+
+import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class StatisticsTests {
+
+    private double[] values;
+    private DescriptiveStatistics descriptiveStatistics;
+
+    @Before
+    public void setUp() {
+        values = new double[] {65, 51 , 16, 11 , 6519, 191 ,0 , 98, 19854, 1, 32};
+
+        descriptiveStatistics = new DescriptiveStatistics();
+        for(double v : values) {
+            descriptiveStatistics.addValue(v);
+        }
+    }
+
+    @Test
+    public void whenDescriptiveStatisticsGetMean_thenCorrect() {
+        Assert.assertEquals(2439.8181818181815, descriptiveStatistics.getMean(), 1e-7);
+    }
+
+    @Test
+    public void whenDescriptiveStatisticsGetMedian_thenCorrect() {
+        Assert.assertEquals(51, descriptiveStatistics.getPercentile(50), 1e-7);
+    }
+
+    @Test
+    public void whenDescriptiveStatisticsGetStandardDeviation_thenCorrect() {
+        Assert.assertEquals(6093.054649651221, descriptiveStatistics.getStandardDeviation(), 1e-7);
+    }
+
+}

apache-fop/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,10 +7,13 @@
         </encoder>
     </appender>
 
-    <!-- <logger name="org.springframework" level="WARN" /> -->
+    <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>

apache-velocity/src/main/resources/logback.xml

@@ -1,23 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-    
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-		<layout class="ch.qos.logback.classic.PatternLayout">
+        <encoder>
-
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-			<Pattern>
+            </pattern>
-				%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
+        </encoder>
-			</Pattern>
-
-		</layout>
     </appender>
 
-	<logger name="com.baeldung.apache.velocity.service" level="debug"
+    <logger name="org.springframework" level="WARN" />
-		additivity="false">
+    <logger name="org.springframework.transaction" level="WARN" />
-		<appender-ref ref="STDOUT" />
-	</logger>
 
-	<root level="error">
+    <!-- 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>

aspectj/pom.xml

@@ -70,11 +70,6 @@
             <artifactId>spring-aop</artifactId>
             <version>4.3.4.RELEASE</version>
         </dependency>
-        <dependency>
-            <groupId>log4j</groupId>
-            <artifactId>log4j</artifactId>
-            <version>1.2.17</version>
-        </dependency>
     </dependencies>
 
     <build>

aspectj/src/main/resources/log4j.properties

@@ -1,10 +0,0 @@
-log4j.rootLogger=TRACE, stdout
-
-# Redirect log messages to console
-log4j.appender.stdout=org.apache.log4j.ConsoleAppender
-log4j.appender.stdout.Target=System.out
-log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
-
-log4j.logger.org.springframework.aop.interceptor.PerformanceMonitorInterceptor=TRACE, stdout
-log4j.logger.com.baeldung.performancemonitor.MyPerformanceMonitorInterceptor=INFO, stdout

aspectj/src/main/resources/logback.xml

@@ -1,18 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-		<layout class="ch.qos.logback.classic.PatternLayout">
+        <encoder>
-		      <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg %n</pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-	    </layout>
+            </pattern>
+        </encoder>
     </appender>
 
-	<logger name="com.baeldung.hazelcast" level="INFO" additivity="false">
+    <logger name="org.springframework" level="WARN" />
-		<appender-ref ref="STDOUT" />
+    <logger name="org.springframework.transaction" level="WARN" />
-  	</logger>
 
-	<root level="DEBUG">          
+    <!-- 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-9/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,10 +7,13 @@
         </encoder>
     </appender>
 
-    <!-- <logger name="org.springframework" level="WARN" /> -->
+    <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/README.md

@@ -91,4 +91,4 @@
 - [Avoiding ConcurrentModificationException when iterating and removing](http://www.baeldung.com/avoiding-concurrentmodificationexception-when-iterating-and-removing)
 - [Removing all nulls from a List in Java](http://www.baeldung.com/java-remove-nulls-from-list)
 - [Removing all duplicates from a List in Java](http://www.baeldung.com/java-remove-duplicates-from-list)
-
+- [An Introduction to ThreadLocal in Java](http://www.baeldung.com/java-threadlocal)

core-java/src/main/java/com/baeldung/logforging/LogForgingDemo.java

@@ -14,9 +14,9 @@ public class LogForgingDemo {
 
 	public static void main(String[] args) {
 		LogForgingDemo demo = new LogForgingDemo();
-		demo.addLog(String.valueOf(300));
+		demo.addLog("300");
-		demo.addLog(String.valueOf(300 + "\n\nweb - 2017-04-12 17:47:08,957 [main] INFO Amount reversed successfully"));
+		demo.addLog("300 \n\nweb - 2017-04-12 17:47:08,957 [main] INFO Amount reversed successfully");
-		demo.addLog(String.valueOf(encode(300 + "\n\nweb - 2017-04-12 17:47:08,957 [main] INFO Amount reversed successfully")));
+		demo.addLog(encode("300 \n\nweb - 2017-04-12 17:47:08,957 [main] INFO Amount reversed successfully"));
 	}
 
 	public static String encode(String message) {

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

@@ -1,5 +1,5 @@
+<?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
@@ -7,10 +7,13 @@
         </encoder>
     </appender>
 
-    <!-- <logger name="org.springframework" level="WARN" /> -->
+    <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>

couchbase-sdk/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -8,10 +8,12 @@
     </appender>
 
     <logger name="org.springframework" level="WARN" />
-    <logger name="com.baeldung" level="DEBUG" />
+    <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>

couchbase-sdk/src/test/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -8,10 +8,12 @@
     </appender>
 
     <logger name="org.springframework" level="WARN" />
-    <logger name="com.baeldung" level="DEBUG" />
+    <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>

gson/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

guava/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

handling-spring-static-resources/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

hazelcast/src/main/resources/logback.xml

@@ -1,18 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-		<layout class="ch.qos.logback.classic.PatternLayout">
+        <encoder>
-		      <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg %n</pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-	    </layout>
+            </pattern>
+        </encoder>
     </appender>
 
-	<logger name="com.baeldung.hazelcast" level="INFO" additivity="false">
+    <logger name="org.springframework" level="WARN" />
-		<appender-ref ref="STDOUT" />
+    <logger name="org.springframework.transaction" level="WARN" />
-  	</logger>
 
-	<root level="DEBUG">          
+    <!-- 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>

httpclient/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,11 +7,13 @@
         </encoder>
     </appender>
 
-    <logger name="org.apache.http" level="DEBUG" />
+    <logger name="org.springframework" level="WARN" />
-    <logger name="org.apache.http.wire" level="INFO" />
+    <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>

jackson/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

jaxb/src/main/resources/logback.xml

@@ -1,18 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-		<layout class="ch.qos.logback.classic.PatternLayout">
+        <encoder>
-		      <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg %n</pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-	    </layout>
+            </pattern>
+        </encoder>
     </appender>
 
-	<logger name="com.baeldung.hazelcast" level="INFO" additivity="false">
+    <logger name="org.springframework" level="WARN" />
-		<appender-ref ref="STDOUT" />
+    <logger name="org.springframework.transaction" level="WARN" />
-  	</logger>
 
-	<root level="DEBUG">          
+    <!-- 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>

jsf/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

kotlin/src/test/kotlin/com/baeldung/kotlin/GenericsTest.kt

@@ -0,0 +1,143 @@
+package com.baeldung.kotlin
+
+import org.junit.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class GenericsTest {
+
+    @Test
+    fun givenParametrizeClass_whenInitializeItWithSpecificType_thenShouldBeParameterized() {
+        //given
+        val parameterizedClass = ParameterizedClass<String>("string-value")
+
+        //when
+        val res = parameterizedClass.getValue()
+
+        //then
+        assertTrue(res is String)
+    }
+
+    @Test
+    fun givenParametrizeClass_whenInitializeIt_thenShouldBeParameterizedByInferredType() {
+        //given
+        val parameterizedClass = ParameterizedClass("string-value")
+
+        //when
+        val res = parameterizedClass.getValue()
+
+        //then
+        assertTrue(res is String)
+    }
+
+    @Test
+    fun givenParameterizedProducerByOutKeyword_whenGetValue_thenCanAssignItToSuperType() {
+        //given
+        val parameterizedProducer = ParameterizedProducer("string")
+
+        //when
+        val ref: ParameterizedProducer<Any> = parameterizedProducer
+
+        //then
+        assertTrue(ref is ParameterizedProducer<Any>)
+    }
+
+    @Test
+    fun givenParameterizedConsumerByInKeyword_whenGetValue_thenCanAssignItToSubType() {
+        //given
+        val parameterizedConsumer = ParameterizedConsumer<Number>()
+
+        //when
+        val ref: ParameterizedConsumer<Double> = parameterizedConsumer
+
+        //then
+        assertTrue(ref is ParameterizedConsumer<Double>)
+    }
+
+    @Test
+    fun givenTypeProjections_whenOperateOnTwoList_thenCanAcceptListOfSubtypes() {
+        //given
+        val ints: Array<Int> = arrayOf(1, 2, 3)
+        val any: Array<Any?> = arrayOfNulls(3)
+
+        //when
+        copy(ints, any)
+
+        //then
+        assertEquals(any[0], 1)
+        assertEquals(any[1], 2)
+        assertEquals(any[2], 3)
+
+    }
+
+    fun copy(from: Array<out Any>, to: Array<Any?>) {
+        assert(from.size == to.size)
+        for (i in from.indices)
+            to[i] = from[i]
+    }
+
+    @Test
+    fun givenTypeProjection_whenHaveArrayOfIn_thenShouldAddElementsOfSubtypesToIt() {
+        //given
+        val objects: Array<Any?> = arrayOfNulls(1)
+
+        //when
+        fill(objects, 1)
+
+        //then
+        assertEquals(objects[0], 1)
+    }
+
+    fun fill(dest: Array<in Int>, value: Int) {
+        dest[0] = value
+    }
+
+    @Test
+    fun givenStartProjection_whenPassAnyType_thenCompile() {
+        //given
+        val array = arrayOf(1,2,3)
+
+        //then
+        printArray(array)
+
+    }
+
+    fun printArray(array: Array<*>) {
+        array.forEach { println(it) }
+    }
+
+    @Test
+    fun givenFunctionWithDefinedGenericConstraints_whenCallWithProperType_thenCompile(){
+        //given
+        val listOfInts = listOf(5,2,3,4,1)
+
+        //when
+        val sorted = sort(listOfInts)
+
+        //then
+        assertEquals(sorted, listOf(1,2,3,4,5))
+    }
+
+    fun <T: Comparable<T>> sort(list: List<T>): List<T>{
+        return list.sorted()
+    }
+
+    class ParameterizedClass<A>(private val value: A) {
+
+        fun getValue(): A {
+            return value
+        }
+    }
+
+    class ParameterizedProducer<out T>(private val value: T) {
+        fun get(): T {
+            return value
+        }
+    }
+
+    class ParameterizedConsumer<in T> {
+        fun toString(value: T): String {
+            return value.toString()
+        }
+    }
+}

libraries/README.md

@@ -6,6 +6,7 @@
 - [Introduction to Javatuples](http://www.baeldung.com/java-tuples)
 - [Introduction to Javassist](http://www.baeldung.com/javassist)
 - [Embedded Jetty Server in Java](http://www.baeldung.com/jetty-embedded)
+- [Introduction to Apache Flink with Java](http://www.baeldung.com/apache-flink)
 
 
 The libraries module contains examples related to small libraries that are relatively easy to use and does not require any separate module of its own.

mockito/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

mybatis/src/main/java/com/baeldung/mybatis/mapper/AddressMapper.java

@@ -4,7 +4,6 @@ import com.baeldung.mybatis.model.Address;
 import com.baeldung.mybatis.model.Person;
 import org.apache.ibatis.annotations.*;
 
-
 public interface AddressMapper {
 
 	@Insert("Insert into address (streetAddress,personId) values(#{streetAddress},#{personId})")
@@ -12,11 +11,9 @@ public interface AddressMapper {
 	public Integer saveAddress(Address address);
 
 	@Select("SELECT addressId, streetAddress FROM Address WHERE addressId = #{addressId}")
-    @Results(value = {
+	@Results(value = { @Result(property = "addressId", column = "addressId"),
-            @Result(property = "addressId", column = "addressId"),
 			@Result(property = "streetAddress", column = "streetAddress"),
-            @Result(property = "person", column = "personId",javaType =Person.class,one=@One(select = "getPerson"))
+			@Result(property = "person", column = "personId", javaType = Person.class, one = @One(select = "getPerson")) })
-    })
 	Address getAddresses(Integer addressID);
 
 	@Select("SELECT personId FROM address WHERE addressId = #{addressId})")

mybatis/src/main/java/com/baeldung/mybatis/mapper/PersonMapper.java

@@ -9,7 +9,6 @@ import org.apache.ibatis.mapping.StatementType;
 import java.util.List;
 import java.util.Map;
 
-
 public interface PersonMapper {
 
 	@Insert("Insert into person(name) values (#{name})")
@@ -25,11 +24,8 @@ public interface PersonMapper {
 	Person getPerson(Integer personId);
 
 	@Select("Select personId,name from Person where personId=#{personId}")
-    @Results(value ={
+	@Results(value = { @Result(property = "personId", column = "personId"), @Result(property = "name", column = "name"),
-            @Result(property = "personId", column = "personId"),
+			@Result(property = "addresses", javaType = List.class, column = "personId", many = @Many(select = "getAddresses"))
-            @Result(property="name", column = "name"),
-            @Result(property = "addresses",javaType = List.class,column = "personId",
-                     many=@Many(select = "getAddresses"))
 
 	})
 	public Person getPersonById(Integer personId);
@@ -44,7 +40,6 @@ public interface PersonMapper {
 	@SelectProvider(type = MyBatisUtil.class, method = "getPersonByName")
 	public Person getPersonByName(String name);
 
-
 	@Select(value = "{ CALL getPersonByProc( #{personId, mode=IN, jdbcType=INTEGER})}")
 	@Options(statementType = StatementType.CALLABLE)
 	public Person getPersonByProc(Integer personId);

mybatis/src/main/java/com/baeldung/mybatis/model/Address.java

@@ -1,6 +1,5 @@
 package com.baeldung.mybatis.model;
 
-
 public class Address {
 
 	private Integer addressId;
@@ -18,8 +17,6 @@ public class Address {
 		this.personId = personId;
 	}
 
-
-
 	public Address(String streetAddress) {
 		this.streetAddress = streetAddress;
 	}

mybatis/src/main/java/com/baeldung/mybatis/model/Person.java

@@ -3,7 +3,6 @@ package com.baeldung.mybatis.model;
 import java.util.ArrayList;
 import java.util.List;
 
-
 public class Person {
 
 	private Integer personId;
@@ -30,6 +29,7 @@ public class Person {
 	public String getName() {
 		return name;
 	}
+
 	public void addAddress(Address address) {
 		addresses.add(address);
 	}

mybatis/src/main/java/com/baeldung/mybatis/utils/MyBatisUtil.java

@@ -1,33 +1,50 @@
 package com.baeldung.mybatis.utils;
+
+import com.baeldung.mybatis.mapper.AddressMapper;
+import com.baeldung.mybatis.mapper.PersonMapper;
+import org.apache.ibatis.datasource.pooled.PooledDataSource;
 import org.apache.ibatis.io.Resources;
 import org.apache.ibatis.jdbc.SQL;
+import org.apache.ibatis.mapping.Environment;
+import org.apache.ibatis.session.Configuration;
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
 
+import javax.sql.DataSource;
 import java.io.IOException;
 import java.io.InputStream;
 
 public class MyBatisUtil {
+	public static final String DRIVER = "org.apache.derby.jdbc.EmbeddedDriver";
+	public static final String URL = "jdbc:derby:testdb1;create=true";
+	public static final String USERNAME = "sa";
+	public static final String PASSWORD = "pass123";
 	private static SqlSessionFactory sqlSessionFactory;
-    static {
+
-        String resource = "mybatis-config.xml";
+	public static SqlSessionFactory buildqlSessionFactory() {
-        InputStream inputStream;
+		DataSource dataSource = new PooledDataSource(DRIVER, URL, USERNAME, PASSWORD);
-        try {
+		Environment environment = new Environment("Development", new JdbcTransactionFactory(), dataSource);
-            inputStream = Resources.getResourceAsStream(resource);
+		Configuration configuration = new Configuration(environment);
-            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+		configuration.addMapper(PersonMapper.class);
-        } catch (IOException e) {
+		configuration.addMapper(AddressMapper.class);
-            e.printStackTrace();
+		SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
-        }
+		SqlSessionFactory factory = builder.build(configuration);
+		return factory;
+
 	}
+
 	public static SqlSessionFactory getSqlSessionFactory() {
 		return sqlSessionFactory;
 	}
 
 	public String getPersonByName(String name) {
-        return new SQL(){{
+		return new SQL() {
+			{
 				SELECT("*");
 				FROM("person");
 				WHERE("name like #{name} || '%'");
-        }}.toString();
+			}
+		}.toString();
 	}
 }

mybatis/src/main/resources/mybatis-config.xml

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<!DOCTYPE configuration
-        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
-        "http://mybatis.org/dtd/mybatis-3-config.dtd">
-<configuration>
-    <environments default="development">
-        <environment id="development">
-            <transactionManager type="JDBC"/>
-            <dataSource type="POOLED">
-                <property name="driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
-                <property name="url" value="jdbc:derby:testdb1;create=true"/>
-                <property name="username" value="sa"/>
-                <property name="password" value="pass123"/>
-            </dataSource>
-        </environment>
-    </environments>
-    <mappers>
-        <mapper class="com.baeldung.mybatis.mapper.PersonMapper"/>
-        <mapper class="com.baeldung.mybatis.mapper.AddressMapper"/>
-    </mappers>
-</configuration>

mybatis/src/test/java/com/baeldung/mybatis/mapper/PersonMapperTest.java

@@ -23,28 +23,23 @@ public class PersonMapperTest {
 	@Before
 	public void setup() throws SQLException {
 
-        session = MyBatisUtil.getSqlSessionFactory().openSession();
+		session = MyBatisUtil.buildqlSessionFactory().openSession();
 		createTables(session);
 
 	}
 
 	private void createTables(SqlSession session) throws SQLException {
 
-        String createPersonTable = "create table person ("
+		String createPersonTable = "create table person (" + "personId integer not null generated always as"
-                + "personId integer not null generated always as"
+				+ " identity (start with 1, increment by 1),   " + "name varchar(30) not null, "
-                + " identity (start with 1, increment by 1),   "
-                + "name varchar(30) not null, "
 				+ "constraint primary_key_person primary key (personId))";
 
-        String createAddressTable = "create table address ("
+		String createAddressTable = "create table address (" + "addressId integer not null generated always as"
-                + "addressId integer not null generated always as"
+				+ " identity (start with 1, increment by 1),   " + "streetAddress varchar(300), personId integer, "
-                + " identity (start with 1, increment by 1),   "
-                + "streetAddress varchar(300), personId integer, "
 				+ "constraint primary_key_address primary key (addressId))";
 
-        String alterTable="ALTER TABLE " +
+		String alterTable = "ALTER TABLE "
-                "    address ADD CONSTRAINT fk_person FOREIGN KEY (personId) REFERENCES person (personId)";
+				+ "    address ADD CONSTRAINT fk_person FOREIGN KEY (personId) REFERENCES person (personId)";
-
 
 		session.getConnection().createStatement().execute(createPersonTable);
 		session.getConnection().createStatement().execute(createAddressTable);
@@ -95,6 +90,7 @@ public class PersonMapperTest {
 		Person returnedPerson = personMapper.getPerson(id);
 		assertEquals("Baljeet1", returnedPerson.getName());
 	}
+
 	@Test
 	public void whenPersoSaved_ThenMapIsReturned() {
 		Person person = new Person("Baljeet S");

querydsl/src/main/resources/logback.xml

@@ -1,37 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-        <layout class="ch.qos.logback.classic.PatternLayout">
+        <encoder>
-            <Pattern>%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p: %c - %m%n</Pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-        </layout>
+            </pattern>
+        </encoder>
     </appender>
 
-    <!-- Application Loggers -->
+    <logger name="org.springframework" level="WARN" />
-    <logger name="de.slackspace.tutorials">
+    <logger name="org.springframework.transaction" level="WARN" />
-        <level value="debug" />
-    </logger>
 
-    <!-- Spring Loggers -->
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
-    <logger name="org.springframework.core">
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
-        <level value="info" />
-    </logger>
 
-    <logger name="org.springframework.beans">
+    <root level="INFO">
-        <level value="info" />
-    </logger>
-
-    <logger name="org.springframework.context">
-        <level value="info" />
-    </logger>
-
-    <!-- Hibernate Loggers -->
-    <logger name="org.hibernate">
-        <level value="warn" />
-    </logger>
-
-    <root level="warn">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

rest-assured/pom.xml

@@ -60,14 +60,15 @@
         </dependency>
 
         <dependency>
-            <groupId>log4j</groupId>
+            <groupId>ch.qos.logback</groupId>
-            <artifactId>log4j</artifactId>
+            <artifactId>logback-classic</artifactId>
-            <version>${log4j.version}</version>
+            <version>${logback.version}</version>
         </dependency>
+
         <dependency>
-            <groupId>org.slf4j</groupId>
+            <groupId>ch.qos.logback</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
+            <artifactId>logback-core</artifactId>
-            <version>${slf4j.version}</version>
+            <version>${logback.version}</version>
         </dependency>
 
         <dependency>
@@ -276,8 +277,9 @@
         <javax.mail.version>1.4.7</javax.mail.version>        
         <jetty.version>9.4.0.v20161208</jetty.version>
         
-        <log4j.version>1.2.17</log4j.version>
         <slf4j.version>1.7.21</slf4j.version>
+        <logback.version>1.1.7</logback.version>
+
         
         <commons-lang3.version>3.5</commons-lang3.version>        
         <commons-logging.version>1.2</commons-logging.version>

rest-assured/src/test/resources/log4j.properties

@@ -1,16 +0,0 @@
-## Logger configure
-datestamp=yyyy-MM-dd HH:mm:ss
-log4j.rootLogger=TRACE, file, console
-
-log4j.appender.file=org.apache.log4j.RollingFileAppender
-log4j.appender.file.maxFileSize=1GB
-log4j.appender.file.maxBackupIndex=5
-log4j.appender.file.File=log/rest-assured.log
-log4j.appender.file.threshold=TRACE
-log4j.appender.file.layout=org.apache.log4j.PatternLayout
-log4j.appender.file.layout.ConversionPattern=%d{${datestamp}} %5p: [%c] - %m%n
-
-log4j.appender.console=org.apache.log4j.ConsoleAppender
-log4j.appender.console.Threshold=INFO
-log4j.appender.console.layout=org.apache.log4j.PatternLayout
-log4j.appender.console.layout.ConversionPattern=%d{${datestamp}} %5p\: [%c] - %m%n

rest-assured/src/test/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>

rest-testing/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,11 +7,13 @@
         </encoder>
     </appender>
 
-    <logger name="org.apache.http" level="DEBUG" />
+    <logger name="org.springframework" level="WARN" />
-    <logger name="org.apache.http.wire" level="INFO" />
+    <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>

resteasy/bin/src/main/webapp/WEB-INF/classes/logback.xml

@@ -1,3 +1,19 @@
-<configuration scan="true" scanPeriod="10 seconds">
+<?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>

resteasy/src/main/webapp/WEB-INF/classes/logback.xml

@@ -1,3 +1,19 @@
-<configuration scan="true" scanPeriod="10 seconds">
+<?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>

spring-all/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -13,10 +13,7 @@
     <!-- in order to debug some marshalling issues, this needs to be TRACE -->
     <logger name="org.springframework.web.servlet.mvc" level="WARN" />
 
-    <logger name="org.springframework.core.io.support" level="INFO" />
-
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-boot/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

spring-cloud/spring-cloud-zookeeper/Greeting/src/main/java/com/baeldung/spring/cloud/greeting/GreetingController.java

@@ -6,8 +6,7 @@
 package com.baeldung.spring.cloud.greeting;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
@@ -16,8 +15,7 @@ public class GreetingController {
 	@Autowired
 	private HelloWorldClient helloWorldClient;
 
-	@RequestMapping(value = "/get-greeting", method = RequestMethod.GET)
+	@GetMapping("/get-greeting")
-
 	public String greeting() {
 
 		return helloWorldClient.HelloWorld();

spring-cloud/spring-cloud-zookeeper/HelloWorld/src/main/java/com/baeldung/spring/cloud/helloworld/HelloWorldController.java

@@ -5,14 +5,13 @@
  */
 package com.baeldung.spring.cloud.helloworld;
 
-import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class HelloWorldController {
 
-	@RequestMapping(path = "/helloworld", method = RequestMethod.GET)
+	@GetMapping("/helloworld")
 	public String HelloWorld() {
 		return "Hello World!";
 	}

spring-custom-aop/spring-custom-aop/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

spring-data-cassandra/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-data-couchbase-2/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -8,10 +8,12 @@
     </appender>
 
     <logger name="org.springframework" level="WARN" />
-    <logger name="org.baeldung" level="DEBUG" />
+    <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>

spring-data-couchbase-2/src/test/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -8,10 +8,12 @@
     </appender>
 
     <logger name="org.springframework" level="WARN" />
-    <logger name="org.baeldung" level="DEBUG" />
+    <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>

spring-data-dynamodb/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

spring-data-elasticsearch/src/main/resources/logback.xml

@@ -1,20 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>elasticsearch - %date [%thread] %-5level %logger{36} - %message%n
+            <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 elastic issues, this needs to be DEBUG or INFO -->
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
-    <logger name="org.elasticsearch" level="INFO" />
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
-    <logger name="com.baeldung.spring" level="DEBUG" />
 
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-data-mongodb/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-data-neo4j/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-data-neo4j/src/test/resources/logback.xml

@@ -1,16 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>%d %5p %40.40c:%4L - %m%n</pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            </pattern>
         </encoder>
     </appender>
 
-    <logger name="org.neo4j.ogm" level="info"/>
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
 
-    <root level="warn">
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
-        <appender-ref ref="console"/>
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-data-redis/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-exceptions/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -13,10 +13,7 @@
     <!-- in order to debug some marshalling issues, this needs to be TRACE -->
     <logger name="org.springframework.web.servlet.mvc" level="WARN" />
 
-    <logger name="org.springframework.core.io.support" level="INFO" />
-
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-hibernate3/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-hibernate4/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,6 @@
         </encoder>
     </appender>
 
-	<logger name="org.hibernate" level="INFO" />
-
     <logger name="org.springframework" level="WARN" />
     <logger name="org.springframework.transaction" level="WARN" />
 
@@ -18,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-hibernate5/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,6 @@
         </encoder>
     </appender>
 
-	<logger name="org.hibernate" level="INFO" />
-
     <logger name="org.springframework" level="WARN" />
     <logger name="org.springframework.transaction" level="WARN" />
 
@@ -18,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-jersey/src/main/resources/logback.xml

@@ -1,15 +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} -
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-                %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>

spring-jpa/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-ldap/src/main/resources/logback.xml

@@ -1,15 +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} -
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-                %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>

spring-mvc-java/src/main/resources/logback.xml

@@ -1,9 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-			<pattern>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
-                %date [%thread] %-5level %logger{6} - %message%n
             </pattern>
         </encoder>
     </appender>
@@ -17,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-mvc-xml/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-quartz/src/main/resources/logback.xml

@@ -1,16 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-			<pattern>%date [%thread] %-5level %logger{36} - %message%n
+            <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>

spring-rest/pom.xml

@@ -188,6 +188,12 @@
             <artifactId>kryo</artifactId>
             <version>${kryo.version}</version>
         </dependency>
+        
+		<dependency>
+		    <groupId>com.jayway.jsonpath</groupId>
+		    <artifactId>json-path</artifactId>
+		</dependency>
+		        
     </dependencies>
 
     <build>
@@ -359,6 +365,7 @@
         <!-- okhttp -->
         <com.squareup.okhttp3.version>3.4.1</com.squareup.okhttp3.version>
 	
+		<json.path.version>2.2.0</json.path.version>
     </properties>
 
 </project>

spring-rest/src/main/java/org/baeldung/web/controller/BazzNewMappingsExampleController.java

@@ -0,0 +1,55 @@
+package org.baeldung.web.controller;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.baeldung.web.dto.Bazz;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+@RestController
+@RequestMapping("/bazz")
+public class BazzNewMappingsExampleController {
+
+    @GetMapping
+    public ResponseEntity<?> getBazzs() throws JsonProcessingException{
+        List<Bazz> data = Arrays.asList(
+            new Bazz("1", "Bazz1"),
+            new Bazz("2", "Bazz2"),
+            new Bazz("3", "Bazz3"),
+            new Bazz("4", "Bazz4"));
+        return new ResponseEntity<>(data, HttpStatus.OK);
+    }
+    
+    @GetMapping("/{id}")
+    public ResponseEntity<?> getBazz(@PathVariable String id){
+        return new ResponseEntity<>(new Bazz(id, "Bazz"+id), HttpStatus.OK);
+    }
+    
+    @PostMapping
+    public ResponseEntity<?> newBazz(@RequestParam("name") String name){
+        return new ResponseEntity<>(new Bazz("5", name), HttpStatus.OK);
+    }
+    
+    @PutMapping("/{id}")
+    public ResponseEntity<?> updateBazz(@PathVariable String id,
+        @RequestParam("name") String name){
+        return new ResponseEntity<>(new Bazz(id, name), HttpStatus.OK);
+    }
+    
+    @DeleteMapping("/{id}")
+    public ResponseEntity<?> deleteBazz(@PathVariable String id){
+        return new ResponseEntity<>(new Bazz(id), HttpStatus.OK);
+    }
+    
+}

spring-rest/src/main/java/org/baeldung/web/dto/Bazz.java

@@ -0,0 +1,22 @@
+package org.baeldung.web.dto;
+
+public class Bazz {
+
+    
+    public String id;
+    public String name;
+
+    public Bazz(String id){
+        this.id = id;
+    }
+    public Bazz(String id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Bazz [id=" + id + ", name=" + name + "]";
+    }
+    
+}

spring-rest/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-rest/src/test/java/org/baeldung/web/test/BazzNewMappingsExampleControllerTest.java

@@ -0,0 +1,80 @@
+
+package org.baeldung.web.test;
+
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.is;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.baeldung.config.WebConfig;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = WebConfig.class)
+@WebAppConfiguration
+public class BazzNewMappingsExampleControllerTest {
+    
+    private MockMvc mockMvc;
+    
+    @Autowired
+    private WebApplicationContext webApplicationContext;
+
+    @Before
+    public void setUp() {
+        mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
+    }
+    
+    @Test
+    public void whenGettingAllBazz_thenSuccess() throws Exception{
+        mockMvc.perform(get("/bazz"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$", hasSize(4)))
+            .andExpect(jsonPath("$[1].id", is("2")))
+            .andExpect(jsonPath("$[1].name", is("Bazz2")));
+    }
+    
+    @Test
+    public void whenGettingABazz_thenSuccess() throws Exception{
+        mockMvc.perform(get("/bazz/1"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id", is("1")))
+            .andExpect(jsonPath("$.name", is("Bazz1")));
+    }
+    
+    @Test
+    public void whenAddingABazz_thenSuccess() throws Exception{
+        mockMvc.perform(post("/bazz").param("name", "Bazz5"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id", is("5")))
+            .andExpect(jsonPath("$.name", is("Bazz5")));
+    }
+    
+    @Test
+    public void whenUpdatingABazz_thenSuccess() throws Exception{
+        mockMvc.perform(put("/bazz/5").param("name", "Bazz6"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id", is("5")))
+            .andExpect(jsonPath("$.name", is("Bazz6")));
+    }
+    
+    @Test
+    public void whenDeletingABazz_thenSuccess() throws Exception{
+        mockMvc.perform(delete("/bazz/5"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id", is("5")));
+    }
+}

spring-security-mvc-boot/src/main/java/org/baeldung/config/SecurityConfig.java

@@ -24,7 +24,7 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
     @Override
     protected void configure(final AuthenticationManagerBuilder auth) throws Exception {
-        auth.userDetailsService(userDetailsService);
+        auth.authenticationProvider(authenticationProvider());
     }
 
     @Override

spring-security-mvc-custom/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-mvc-digest-auth/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-mvc-ldap/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -10,13 +10,10 @@
     <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" />
 
-	<logger name="org.springframework.boot" level="WARN" />
-	<logger name="org.springframework.security" level="WARN" />
-
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-mvc-login/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-mvc-persisted-remember-me/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-mvc-session/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-rest-basic-auth/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,6 @@
         </encoder>
     </appender>
 
-	<logger name="org.apache.http" level="TRACE" />
-	
     <logger name="org.springframework" level="WARN" />
     <logger name="org.springframework.transaction" level="WARN" />
 
@@ -18,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-rest-custom/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-rest-digest-auth/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,6 @@
         </encoder>
     </appender>
 
-	<logger name="org.apache.http" level="TRACE" />
-	
     <logger name="org.springframework" level="WARN" />
     <logger name="org.springframework.transaction" level="WARN" />
 
@@ -18,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-rest-full/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-security-rest/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

spring-thymeleaf/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -16,5 +16,4 @@
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>
-
 </configuration>

testng/src/test/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

vertx/src/main/resources/logback.xml

@@ -1,5 +1,5 @@
+<?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
@@ -7,8 +7,13 @@
         </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>

xstream/pom.xml

@@ -27,10 +27,23 @@
         </dependency>
 
         <dependency>
-            <groupId>log4j</groupId>
+            <groupId>org.slf4j</groupId>
-            <artifactId>log4j</artifactId>
+            <artifactId>slf4j-api</artifactId>
-            <version>${log4j.version}</version>
+            <version>${org.slf4j.version}</version>
         </dependency>
+
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>${logback.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-core</artifactId>
+            <version>${logback.version}</version>
+        </dependency>        
+
     </dependencies>
 
     <build>
@@ -51,7 +64,9 @@
         <xstream.version>1.4.9</xstream.version>
         <jettison.version>1.3.8</jettison.version>
 
-        <log4j.version>1.2.17</log4j.version>
+        <org.slf4j.version>1.7.21</org.slf4j.version>
+        <logback.version>1.1.7</logback.version>
+        
         <!-- testing -->
         <junit.version>4.12</junit.version>
 

xstream/src/main/resources/log4j.properties

@@ -1,14 +0,0 @@
-# Root logger option
-log4j.rootLogger=DEBUG, file
-# Redirect log messages to console
-# log4j.appender.stdout=org.apache.log4j.ConsoleAppender
-# log4j.appender.stdout.Target=System.out
-# log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-# log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
-# Redirect log messages to a log file, support file rolling.
-log4j.appender.file=org.apache.log4j.RollingFileAppender
-log4j.appender.file.File=D:\\Test\\xstream-application.log
-log4j.appender.file.MaxFileSize=5MB
-log4j.appender.file.MaxBackupIndex=10
-log4j.appender.file.layout=org.apache.log4j.PatternLayout
-log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

xstream/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>