完成skywalking的日志插件并且提交example工程

skywalking-log/example/pom.xml

+<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">
+    <parent>
+        <artifactId>skywalking-log</artifactId>
+        <groupId>com.ai.cloud</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>example</artifactId>
+    <packaging>jar</packaging>
+
+    <name>example</name>
+    <url>http://maven.apache.org</url>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>3.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>1.2.17</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.4.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.ai.cloud</groupId>
+            <artifactId>skywalking-log4j-2.x-plugin</artifactId>
+            <version>1.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>com.ai.cloud</groupId>
+            <artifactId>skywalking-log4j-1.x-plugin</artifactId>
+            <version>1.0-SNAPSHOT</version>
+        </dependency>
+    </dependencies>
+</project>

skywalking-log/example/src/test/java/com/ai/cloud/log/test/TestA.java

+package com.ai.cloud.log.test;
+
+import org.apache.log4j.Logger;
+
+public class TestA {
+
+    private Logger logger = Logger.getLogger(TestA.class);
+
+    public void logHelloWorld() {
+        logger.info("Hello World");
+        new TestB().log2jHelloWorld();
+    }
+
+    public static void main(String[] args) {
+        new TestA().logHelloWorld();
+    }
+}

skywalking-log/example/src/test/java/com/ai/cloud/log/test/TestB.java

+package com.ai.cloud.log.test;
+
+
+import org.apache.logging.log4j.LogManager;
+
+public class TestB {
+
+    private org.apache.logging.log4j.Logger logger = LogManager.getLogger(TestB.class);
+
+    public void log2jHelloWorld() {
+        logger.info("{}", "Hello World");
+    }
+}

skywalking-log/example/src/test/resources/log4j.properties

+log4j.rootLogger=INFO, A1
+#log4j.appender.A1=org.apache.log4j.FileAppender 
+#log4j.appender.A1.File=${catalina.base}/logs/mvno_crm_all.log
+#log4j.appender.A1.layout=org.apache.log4j.PatternLayout 
+#log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss.SSS} %c %n[%p] %n%m%n  
+
+log4j.appender.A1=org.apache.log4j.ConsoleAppender 
+#log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout=com.ai.cloud.skywalking.plugin.log.log4j.v1.x.TraceIdPatternLayout
+log4j.appender.A1.layout.ConversionPattern=[%x] %-d{yyyy-MM-dd HH:mm:ss.SSS} %c %n[%p] %n%m%n
+ 
+log4j.logger.com.ailk=DEBUG
+log4j.logger.org.springframework=DEBUG
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skywalking-log/example/src/test/resources/log4j2.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="debug">
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout  pattern="%d{HH:mm:ss.SSS} [%tid] [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="debug">
+            <AppenderRef ref="Console"/>
+        </Root>
+    </Loggers>
+</Configuration>
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skywalking-log/log4j-1.x-plugin/src/main/java/com/ai/cloud/skywalking/plugin/log/log4j/v1/x/TraceIdPatternConverter.java

+package com.ai.cloud.skywalking.plugin.log.log4j.v1.x;
+
+import com.ai.cloud.skywalking.api.Tracing;
+import org.apache.log4j.helpers.PatternConverter;
+import org.apache.log4j.spi.LoggingEvent;
+
+public class TraceIdPatternConverter extends PatternConverter {
+    @Override
+    protected String convert(LoggingEvent loggingEvent) {
+        return "TID:" + Tracing.getTraceId();
+    }
+}

skywalking-log/log4j-1.x-plugin/src/main/java/com/ai/cloud/skywalking/plugin/log/log4j/v1/x/TraceIdPatternLayout.java

+package com.ai.cloud.skywalking.plugin.log.log4j.v1.x;
+
+
+import org.apache.log4j.PatternLayout;
+import org.apache.log4j.helpers.PatternParser;
+
+public class TraceIdPatternLayout extends PatternLayout {
+    @Override
+    protected PatternParser createPatternParser(String pattern) {
+        return new TraceIdPatternParser(pattern);
+    }
+}

skywalking-log/log4j-1.x-plugin/src/main/java/com/ai/cloud/skywalking/plugin/log/log4j/v1/x/TraceIdPatternParser.java

+package com.ai.cloud.skywalking.plugin.log.log4j.v1.x;
+
+import org.apache.log4j.helpers.PatternParser;
+
+/**
+ * Created by astraea on 2015/12/31.
+ */
+public class TraceIdPatternParser extends PatternParser {
+    public TraceIdPatternParser(String pattern) {
+        super(pattern);
+    }
+
+    @Override
+    protected void finalizeConverter(char c) {
+        if ('x' == c) {
+            addConverter(new TraceIdPatternConverter());
+        } else {
+            super.finalizeConverter(c);
+        }
+    }
+}

skywalking-log/log4j-2.x-plugin/src/main/java/com/ai/cloud/skywalking/plugin/log/log4j/v2/x/TraceIdConverter.java

+package com.ai.cloud.skywalking.plugin.log.log4j.v2.x;
+
+import com.ai.cloud.skywalking.api.Tracing;
+import org.apache.logging.log4j.core.LogEvent;
+import org.apache.logging.log4j.core.config.plugins.Plugin;
+import org.apache.logging.log4j.core.pattern.ConverterKeys;
+import org.apache.logging.log4j.core.pattern.LogEventPatternConverter;
+
+@Plugin(name = "TraceIdConverter", category = "Converter")
+@ConverterKeys({"tid"})
+public class TraceIdConverter extends LogEventPatternConverter {
+
+    /**
+     * Constructs an instance of LoggingEventPatternConverter.
+     *
+     * @param name  name of converter.
+     * @param style CSS style for output.
+     */
+    protected TraceIdConverter(String name, String style) {
+        super(name, style);
+    }
+
+    public static TraceIdConverter newInstance(String[] options) {
+        return new TraceIdConverter("tid", "tid");
+    }
+
+    @Override
+    public void format(LogEvent event, StringBuilder toAppendTo) {
+        toAppendTo.append("TId:" + Tracing.getTraceId());
+    }
+}

skywalking-log/log4j-2.x-plugin/src/test/java/TestLog.java

+import org.apache.logging.log4j.LogManager;
+
+/**
+ * Created by astraea on 2015/12/31.
+ */
+public class TestLog {
+    public static void main(String[] args) {
+        org.apache.logging.log4j.Logger logger = LogManager.getLogger(TestLog.class);
+        logger.info("{}","Hello World");
+    }
+}

skywalking-log/log4j-2.x-plugin/src/test/resources/log4j2.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="debug">
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout  pattern="%d{HH:mm:ss.SSS} [%tid] [%t] %-5level %logger{36} - %msg%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="debug">
+            <AppenderRef ref="Console"/>
+        </Root>
+    </Loggers>
+</Configuration>
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