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

log4j/pom.xml

@@ -9,12 +9,23 @@
     <version>1.0-SNAPSHOT</version>
 
 	<dependencies>
-        <!--log4j dependencies-->
+		<!--log4j dependencies -->
 		<dependency>
 			<groupId>log4j</groupId>
 			<artifactId>log4j</artifactId>
 			<version>${log4j.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>log4j</groupId>
+			<artifactId>apache-log4j-extras</artifactId>
+			<version>${log4j.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>log4j</groupId>
+			<artifactId>apache-log4j-extras</artifactId>
+			<version>${log4j.version}</version>
+		</dependency>
 
         <!--log4j2 dependencies-->
         <dependency>

log4j/src/main/java/com/baeldung/log4j/Log4jRollingExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.log4j;
+
+import java.util.stream.IntStream;
+
+import org.apache.log4j.Logger;
+
+public class Log4jRollingExample {
+
+    private final static Logger logger = Logger.getLogger(Log4jRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the " + i + " time I say 'Hello World'.");
+            Thread.sleep(100);
+        }
+    }
+
+}

log4j/src/main/java/com/baeldung/log4j2/Log4j2RollingExample.java

@@ -0,0 +1,19 @@
+package com.baeldung.log4j2;
+
+import java.util.stream.IntStream;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class Log4j2RollingExample {
+
+    private static final Logger logger = LogManager.getLogger(Log4j2RollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+    }
+
+}

log4j/src/main/java/com/baeldung/logback/LogbackRollingExample.java

@@ -0,0 +1,19 @@
+package com.baeldung.logback;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.stream.IntStream;
+
+public class LogbackRollingExample {
+
+    private static final Logger logger = LoggerFactory.getLogger(LogbackRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+    }
+
+}

log4j/src/main/java/com/baeldung/slf4j/Slf4jRollingExample.java

@@ -0,0 +1,19 @@
+package com.baeldung.slf4j;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.stream.IntStream;
+
+public class Slf4jRollingExample {
+
+    private static Logger logger = LoggerFactory.getLogger(Slf4jRollingExample.class);
+
+    public static void main(String[] args) throws InterruptedException {
+        for(int i = 0; i<2000; i++){
+            logger.info("This is the {} time I say 'Hello World'.", i);
+            Thread.sleep(100);
+        }
+    }
+
+}

log4j/src/main/resources/log4j.xml

@@ -1,28 +1,95 @@
 <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd" >
 <log4j:configuration debug="false">
 
-    <!--Console appender-->
+    <!--Console appender -->
     <appender name="stdout" class="org.apache.log4j.ConsoleAppender">
         <layout class="org.apache.log4j.PatternLayout">
             <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %p %m%n"/>
         </layout>
     </appender>
 
-    <!-- File appender-->
+    <!-- File appender -->
     <appender name="fout" class="org.apache.log4j.FileAppender">
         <param name="file" value="log4j/target/baeldung-log4j.log"/>
         <param name="append" value="false"/>
         <layout class="org.apache.log4j.PatternLayout">
             <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n"/>
-            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %p %m%n"/>
         </layout>
     </appender>
 
-    <!--Override log level for specified package-->
+    <!-- Rolling appenders -->
+    <appender name="roll-by-size" class="org.apache.log4j.RollingFileAppender">
+        <param name="file" value="target/log4j/roll-by-size/app.log"/>
+        <param name="MaxFileSize" value="5KB"/>
+        <param name="MaxBackupIndex" value="2"/> <!-- It's one by default. -->
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n"/>
+        </layout>
+    </appender>
+    <appender name="roll-by-size-2" class="org.apache.log4j.RollingFileAppender">
+        <param name="file" value="target/log4j/roll-by-size-2/app.log"/>
+        <param name="MaxFileSize" value="5KB"/>
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n"/>
+        </layout>
+    </appender>
+    <appender name="roll-by-window"
+        class="org.apache.log4j.rolling.RollingFileAppender">
+        <rollingPolicy
+            class="org.apache.log4j.rolling.FixedWindowRollingPolicy">
+            <param name="ActiveFileName" value="target/log4j/roll-by-window/app.log"/>
+            <param name="FileNamePattern"
+                value="target/log4j/roll-by-window/app.%i.log.gz"/>
+            <param name="MinIndex" value="7"/>
+            <param name="MaxIndex" value="17"/>
+        </rollingPolicy>
+        <triggeringPolicy
+            class="org.apache.log4j.rolling.SizeBasedTriggeringPolicy">
+            <param name="MaxFileSize" value="50000"/>
+        </triggeringPolicy>
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %m%n"/>
+        </layout>
+    </appender>
+    <appender name="roll-by-time"
+        class="org.apache.log4j.rolling.RollingFileAppender">
+        <rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
+            <param name="FileNamePattern"
+                value="target/log4j/roll-by-time/app.%d{HH-mm}.log.gz"/>
+        </rollingPolicy>
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p - %m%n"/>
+        </layout>
+    </appender>
+    <appender name="roll-by-time-and-size"
+        class="org.apache.log4j.rolling.RollingFileAppender">
+        <rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
+            <param name="FileNamePattern"
+                value="target/log4j/roll-by-time-and-size/app.%d{HH-mm}.%i.log.gz"/>
+        </rollingPolicy>
+        <triggeringPolicy
+            class="org.apache.log4j.rolling.SizeBasedTriggeringPolicy">
+            <param name="MaxFileSize" value="50000"/>
+        </triggeringPolicy>
+        <layout class="org.apache.log4j.PatternLayout">
+            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p - %m%n"/>
+        </layout>
+    </appender>
+
+    <!--Override log level for specified package -->
     <category name="com.baeldung.log4j">
         <priority value="TRACE"/>
     </category>
 
+    <category name="com.baeldung.log4j.Log4jRollingExample">
+        <priority value="TRACE"/>
+        <appender-ref ref="roll-by-size"/>
+        <appender-ref ref="roll-by-size-2"/>
+        <appender-ref ref="roll-by-window"/>
+        <appender-ref ref="roll-by-time"/>
+        <appender-ref ref="roll-by-time-and-size"/>
+    </category>
+
     <root>
         <level value="DEBUG"/>
         <appender-ref ref="stdout"/>

log4j/src/main/resources/log4j2.xml

@@ -8,16 +8,70 @@
         </Console>
 
         # File appender
-        <File name="fout" fileName="log4j/target/baeldung-log4j2.log" immediateFlush="false" append="false">
+        <File name="fout" fileName="log4j/target/baeldung-log4j2.log"
+            immediateFlush="false" append="false">
             # Pattern of log message for file appender
             <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} %p %m%n"/>
         </File>
+
+        # Rolling appender
+        <RollingFile name="roll-by-size"
+            fileName="target/log4j2/roll-by-size/app.log" filePattern="target/log4j2/roll-by-size/app.%i.log.gz"
+            ignoreExceptions="false">
+            <PatternLayout>
+                <Pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</Pattern>
+            </PatternLayout>
+            <Policies>
+                <OnStartupTriggeringPolicy/>
+                <SizeBasedTriggeringPolicy
+                    size="5 KB"/>
+            </Policies>
+        </RollingFile>
+
+        <RollingFile name="roll-by-time"
+            fileName="target/log4j2/roll-by-time/app.log"
+            filePattern="target/log4j2/roll-by-time/app.%d{MM-dd-yyyy-HH-mm}.log.gz"
+            ignoreExceptions="false">
+            <PatternLayout>
+                <Pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</Pattern>
+            </PatternLayout>
+            <TimeBasedTriggeringPolicy/>
+        </RollingFile>
+
+        <RollingFile name="roll-by-time-and-size"
+            fileName="target/log4j2/roll-by-time-and-size/app.log"
+            filePattern="target/log4j2/roll-by-time-and-size/app.%d{MM-dd-yyyy-HH-mm}.%i.log.gz"
+            ignoreExceptions="false">
+            <PatternLayout>
+                <Pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</Pattern>
+            </PatternLayout>
+            <Policies>
+                <OnStartupTriggeringPolicy/>
+                <SizeBasedTriggeringPolicy
+                    size="5 KB"/>
+                <TimeBasedTriggeringPolicy/>
+            </Policies>
+            <DefaultRolloverStrategy>
+                <Delete basePath="${baseDir}" maxDepth="2">
+                    <IfFileName
+                        glob="target/log4j2/roll-by-time-and-size/app.*.log.gz"/>
+                    <IfLastModified age="20s"/>
+                </Delete>
+            </DefaultRolloverStrategy>
+        </RollingFile>
     </Appenders>
 
     <Loggers>
         # Override log level for specified package
         <Logger name="com.baeldung.log4j2" level="TRACE"/>
 
+        <Logger name="com.baeldung.log4j2.Log4j2RollingExample"
+            level="TRACE">
+            <AppenderRef ref="roll-by-size"/>
+            <AppenderRef ref="roll-by-time"/>
+            <AppenderRef ref="roll-by-time-and-size"/>
+        </Logger>
+
         <AsyncRoot level="DEBUG">
             <AppenderRef ref="stdout"/>
             <AppenderRef ref="fout"/>

log4j/src/main/resources/logback.xml

@@ -18,8 +18,65 @@
         </encoder>
     </appender>
 
+    # Rolling appenders
+    <appender name="roll-by-size"
+        class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>target/slf4j/roll-by-size/app.log</file>
+        <rollingPolicy
+            class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
+            <fileNamePattern>target/slf4j/roll-by-size/app.%i.log.zip
+            </fileNamePattern>
+            <minIndex>1</minIndex>
+            <maxIndex>3</maxIndex>
+            <totalSizeCap>1MB</totalSizeCap>
+        </rollingPolicy>
+        <triggeringPolicy
+            class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
+            <maxFileSize>5KB</maxFileSize>
+        </triggeringPolicy>
+        <encoder>
+            <pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <appender name="roll-by-time"
+        class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>target/slf4j/roll-by-time/app.log</file>
+        <rollingPolicy
+            class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
+            <fileNamePattern>target/slf4j/roll-by-time/app.%d{yyyy-MM-dd-HH-mm}.log.zip
+            </fileNamePattern>
+            <maxHistory>20</maxHistory>
+            <totalSizeCap>1MB</totalSizeCap>
+        </rollingPolicy>
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="roll-by-time-and-size"
+        class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>target/slf4j/roll-by-time-and-size/app.log</file>
+        <rollingPolicy
+            class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
+            <fileNamePattern>target/slf4j/roll-by-time-and-size/app.%d{yyyy-MM-dd-mm}.%i.log.zip
+            </fileNamePattern>
+            <maxFileSize>5KB</maxFileSize>
+            <maxHistory>20</maxHistory>
+            <totalSizeCap>1MB</totalSizeCap>
+        </rollingPolicy>
+        <encoder>
+            <pattern>%d{yyyy-MM-dd HH:mm:ss} %p %m%n</pattern>
+        </encoder>
+    </appender>
+
     # Override log level for specified package
-    <logger name="com.baeldung.logback" level="TRACE"/>
+    <logger name="com.baeldung.slf4j.Slf4jRollingExample" level="TRACE">
+        <appender-ref ref="roll-by-size"/>
+        <appender-ref ref="roll-by-time"/>
+        <appender-ref ref="roll-by-time-and-size"/>
+    </logger>
 
     <root level="DEBUG">
         <appender-ref ref="stdout"/>