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

guest/log4j2-example/.gitignore

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+/target/
+.settings/
+.classpath
+.project

guest/log4j2-example/java.log

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+14:00:35.258 INFO Programmatic Logger Message
+14:03:51.178 INFO Programmatic Logger Message
+14:04:11.753 INFO Programmatic Logger Message

guest/log4j2-example/logs/app.log

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+[
+{
+  "timeMillis" : 1496315051753,
+  "thread" : "main",
+  "level" : "INFO",
+  "loggerName" : "RollingFileLogger",
+  "message" : "Json Message 1",
+  "endOfBatch" : false,
+  "loggerFqcn" : "org.apache.logging.log4j.spi.AbstractLogger",
+  "threadId" : 1,
+  "threadPriority" : 5
+}
+, {
+  "timeMillis" : 1496315051862,
+  "thread" : "main",
+  "level" : "INFO",
+  "loggerName" : "RollingFileLogger",
+  "message" : "Json Messag 2",
+  "endOfBatch" : false,
+  "loggerFqcn" : "org.apache.logging.log4j.spi.AbstractLogger",
+  "threadId" : 1,
+  "threadPriority" : 5
+}
+
+]

guest/log4j2-example/pom.xml

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+<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>log4j2-example</groupId>
+    <artifactId>log4j2-example</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>log4j2-example</name>
+    
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../../</relativePath>
+    </parent>
+
+    <dependencies>
+        <!-- This is the needed core component. -->
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>${log4j-core.version}</version>
+        </dependency>
+
+        <!-- This is used by JSONLayout. -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources/</directory>
+                <excludes>
+                    <exclude>**/*.java</exclude>
+                </excludes>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+        <log4j-core.version>2.8.2</log4j-core.version>
+    </properties>
+
+</project>

guest/log4j2-example/src/main/java/com/stackify/models/User.java

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+package com.stackify.models;
+
+import java.time.LocalDate;
+
+public class User {
+    private String name;
+    private String email;
+    private LocalDate dateOfBirth;
+
+    public User() {
+    }
+
+    public User(String name, String email) {
+        super();
+        this.name = name;
+        this.email = email;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public LocalDate getDateOfBirth() {
+        return dateOfBirth;
+    }
+
+    public void setDateOfBirth(LocalDate dateOfBirth) {
+        this.dateOfBirth = dateOfBirth;
+    }
+
+}

guest/log4j2-example/src/main/java/com/stackify/services/MyService.java

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+package com.stackify.services;
+
+import java.time.LocalDate;
+import java.time.Period;
+
+import com.stackify.models.User;
+
+public class MyService {
+
+    public int calculateUserAge(User user) {
+        return Period.between(user.getDateOfBirth(), LocalDate.now()).getYears();
+    }
+
+}

guest/log4j2-example/src/main/resources/log4j2.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+	<CustomLevels>
+		<CustomLevel name="NEW_XML_LEVEL" intLevel="350" />
+	</CustomLevels>
+	<Filters>
+		<BurstFilter level="INFO" rate="10" maxBurst="100" />
+	</Filters>
+	<Appenders>
+		<Console name="ColoredConsole" target="SYSTEM_OUT">
+			<PatternLayout
+				pattern="%d{HH:mm:ss.SSS} [%t] %highlight{%level}{FATAL=bg_red, ERROR=red, WARN=yellow, INFO=green, DEBUG=blue, NEW_LEVEL=black, NEW_XML_LEVEL=black} - %msg%n" />
+		</Console>
+		<Console name="Console" target="SYSTEM_OUT">
+			<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %level - %msg%n" />
+		</Console>
+		<RollingFile name="RollingFileAppender" fileName="logs/app.log"
+			filePattern="logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz">
+			<JSONLayout complete="true" compact="false" />
+			<Policies>
+				<OnStartupTriggeringPolicy />
+				<TimeBasedTriggeringPolicy />
+				<SizeBasedTriggeringPolicy size="50 MB" />
+			</Policies>
+			<DefaultRolloverStrategy max="20" />
+		</RollingFile>
+		<!-- 
+		<JDBC name="JDBCAppender" tableName="logs">
+			<DataSource jndiName="java:/comp/env/jdbc/LoggingDataSource" />
+			<Column name="date" isEventTimestamp="true" />
+			<Column name="logger" pattern="%logger" />
+			<Column name="level" pattern="%level" />
+			<Column name="message" pattern="%message" />
+			<Column name="exception" pattern="%ex{full}" />
+		</JDBC>
+		
+		<Failover name="FailoverAppender" primary="JDBCAppender">
+			<Failovers>
+				<AppenderRef ref="RollingFileAppender" />
+				<AppenderRef ref="Console" />
+			</Failovers>
+		</Failover>
+		 -->
+	</Appenders>
+	<Loggers>
+		<Root level="debug">
+			<AppenderRef ref="ColoredConsole" />
+		</Root>
+		<Logger name="ConsoleLogger">
+			<AppenderRef ref="Console" />
+		</Logger>
+		<Logger name="RollingFileLogger">
+			<AppenderRef ref="RollingFileAppender" />
+		</Logger>
+		<!-- 
+		<Logger name="JDBCLogger">
+			<AppenderRef ref="JDBCAppender" />
+			<RegexFilter regex="*jdbc*" onMatch="ACCEPT" onMismatch="DENY" />
+		</Logger>
+		 -->
+	</Loggers>
+</Configuration>

guest/log4j2-example/src/test/java/com/stackify/services/MyServiceUnitTest.java

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+package com.stackify.services;
+
+import java.time.LocalDate;
+import java.time.Month;
+
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.core.Appender;
+import org.apache.logging.log4j.core.LoggerContext;
+import org.apache.logging.log4j.core.appender.FileAppender;
+import org.apache.logging.log4j.core.config.AppenderRef;
+import org.apache.logging.log4j.core.config.Configuration;
+import org.apache.logging.log4j.core.config.LoggerConfig;
+import org.apache.logging.log4j.core.layout.PatternLayout;
+import org.junit.Test;
+
+import com.stackify.models.User;
+import com.stackify.services.MyService;
+
+public class MyServiceUnitTest {
+
+    private static final Logger logger = LogManager.getLogger(MyServiceUnitTest.class);
+
+    @Test
+    public void testService() {
+        MyService myService = new MyService();
+        User user = new User("John", "john@yahoo.com");
+        user.setDateOfBirth(LocalDate.of(1980, Month.APRIL, 20));
+        logger.info("Age of user {} is {}", () -> user.getName(), () -> myService.calculateUserAge(user));
+    }
+
+    @Test
+    public void testColoredLogger() {
+        logger.fatal("Fatal level message");
+        logger.error("Error level message");
+        logger.warn("Warn level message");
+        logger.info("Info level message");
+        logger.debug("Debug level message");
+    }
+
+    @Test
+    public void testRollingFileAppender() {
+        Logger rfLogger = LogManager.getLogger("RollingFileLogger");
+        rfLogger.info("Json Message 1");
+        rfLogger.info("Json Message 2");
+    }
+
+    @Test
+    public void testProgrammaticConfig() {
+        LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
+        Configuration config = ctx.getConfiguration();
+
+        PatternLayout layout = PatternLayout.newBuilder().withConfiguration(config).withPattern("%d{HH:mm:ss.SSS} %level %msg%n").build();
+
+        Appender appender = FileAppender.newBuilder().setConfiguration(config).withName("programmaticFileAppender").withLayout(layout).withFileName("java.log").build();
+        appender.start();
+        config.addAppender(appender);
+        AppenderRef ref = AppenderRef.createAppenderRef("programmaticFileAppender", null, null);
+        AppenderRef[] refs = new AppenderRef[] { ref };
+
+        LoggerConfig loggerConfig = LoggerConfig.createLogger(false, Level.INFO, "programmaticLogger", "true", refs, null, config, null);
+
+        loggerConfig.addAppender(appender, null, null);
+        config.addLogger("programmaticLogger", loggerConfig);
+        ctx.updateLoggers();
+
+        Logger pLogger = LogManager.getLogger("programmaticLogger");
+        pLogger.info("Programmatic Logger Message");
+    }
+
+    @Test
+    public void testCustomLevel() {
+        Level myLevel = Level.forName("NEW_LEVEL", 350);
+        logger.log(myLevel, "Custom Level Message");
+
+        logger.log(Level.getLevel("NEW_XML_LEVEL"), "Custom XML Level Message");
+
+    }
+
+}