diff --git a/pom.xml b/pom.xml
index 20c365378..510ec8fa4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,7 +13,7 @@
         <module>skywalking-webui</module>
         <module>skywalking-sniffer</module>
         <module>skywalking-storage-center</module>
-        <module>skywalking-opentracing-kit</module>
+        <module>skywalking-application-toolkit</module>
     </modules>
     <packaging>pom</packaging>
 
diff --git a/skywalking-application-toolkit/pom.xml b/skywalking-application-toolkit/pom.xml
new file mode 100644
index 000000000..a45435903
--- /dev/null
+++ b/skywalking-application-toolkit/pom.xml
@@ -0,0 +1,27 @@
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
+    <parent>
+        <artifactId>skywalking</artifactId>
+        <groupId>com.a.eye</groupId>
+        <version>2.0-2016</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>skywalking-application-toolkit</artifactId>
+    <packaging>jar</packaging>
+
+    <properties>
+        <compiler.version>1.6</compiler.version>
+    </properties>
+
+    <modules>
+        <module>skywalking-toolkit-log4j-1.x</module>
+    </modules>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.a.eye</groupId>
+            <artifactId>skywalking-toolkit-log4j-1.x</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/pom.xml b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/pom.xml
new file mode 100644
index 000000000..35a9fe189
--- /dev/null
+++ b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/pom.xml
@@ -0,0 +1,23 @@
+<?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">
+    <parent>
+        <artifactId>skywalking-application-toolkit</artifactId>
+        <groupId>com.a.eye</groupId>
+        <version>2.0-2016</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>skywalking-toolkit-log4j-1.x</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <version>1.2.17</version>
+            <scope>compile</scope>
+        </dependency>s
+    </dependencies>
+
+</project>
diff --git a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternConverter.java b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternConverter.java
new file mode 100644
index 000000000..bccbd64ed
--- /dev/null
+++ b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternConverter.java
@@ -0,0 +1,15 @@
+package com.a.eye.skywalking.plugin.log.log4j.v1.x;
+
+import org.apache.log4j.helpers.PatternConverter;
+import org.apache.log4j.spi.LoggingEvent;
+
+/**
+ * Created by wusheng on 2016/12/7.
+ */
+
+public class TraceIdPatternConverter extends PatternConverter {
+    @Override
+    protected String convert(LoggingEvent loggingEvent) {
+        return "TID: N/A";
+    }
+}
diff --git a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternLayout.java b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternLayout.java
new file mode 100644
index 000000000..2d38762f5
--- /dev/null
+++ b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternLayout.java
@@ -0,0 +1,15 @@
+package com.a.eye.skywalking.plugin.log.log4j.v1.x;
+
+
+import org.apache.log4j.PatternLayout;
+import org.apache.log4j.helpers.PatternParser;
+
+/**
+ * Created by wusheng on 2016/12/7.
+ */
+public class TraceIdPatternLayout extends PatternLayout {
+    @Override
+    protected PatternParser createPatternParser(String pattern) {
+        return new TraceIdPatternParser(pattern);
+    }
+}
diff --git a/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternParser.java b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternParser.java
new file mode 100644
index 000000000..58b7a083d
--- /dev/null
+++ b/skywalking-application-toolkit/skywalking-toolkit-log4j-1.x/src/main/java/com/a/eye/skywalking/plugin/log/log4j/v1/x/TraceIdPatternParser.java
@@ -0,0 +1,22 @@
+package com.a.eye.skywalking.plugin.log.log4j.v1.x;
+
+import org.apache.log4j.helpers.PatternParser;
+
+/**
+ * Created by wusheng on 2016/12/7.
+ */
+
+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);
+        }
+    }
+}
diff --git a/skywalking-opentracing-kit/pom.xml b/skywalking-opentracing-kit/pom.xml
deleted file mode 100644
index 151ca96aa..000000000
--- a/skywalking-opentracing-kit/pom.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
-    <parent>
-        <artifactId>skywalking</artifactId>
-        <groupId>com.a.eye</groupId>
-        <version>2.0-2016</version>
-    </parent>
-    <modelVersion>4.0.0</modelVersion>
-    <artifactId>skywalking-opentracing-kit</artifactId>
-    <packaging>jar</packaging>
-</project>
diff --git a/skywalking-sniffer/pom.xml b/skywalking-sniffer/pom.xml
index 0a2db3b37..a7484b0bb 100644
--- a/skywalking-sniffer/pom.xml
+++ b/skywalking-sniffer/pom.xml
@@ -16,6 +16,7 @@
         <module>skywalking-agent</module>
         <module>skywalking-api</module>
         <module>skywalking-sdk-plugin</module>
+        <module>skywalking-toolkit-activation</module>
     </modules>
 
     <properties>
diff --git a/skywalking-sniffer/skywalking-agent/pom.xml b/skywalking-sniffer/skywalking-agent/pom.xml
index 666c2beb0..67b424178 100644
--- a/skywalking-sniffer/skywalking-agent/pom.xml
+++ b/skywalking-sniffer/skywalking-agent/pom.xml
@@ -26,6 +26,7 @@
     </properties>
 
     <dependencies>
+        <!-- plugin -->
         <dependency>
             <groupId>com.a.eye</groupId>
             <artifactId>skywalking-jedis-2.x-plugin</artifactId>
@@ -56,6 +57,13 @@
             <artifactId>motan-plugin</artifactId>
             <version>${project.version}</version>
         </dependency>
+
+        <!-- activation -->
+        <dependency>
+            <groupId>com.a.eye</groupId>
+            <artifactId>skywalking-toolkit-log4j-1.x-activation</artifactId>
+            <version>${project.version}</version>
+        </dependency>
     </dependencies>
     <build>
         <finalName>${artifactId}</finalName>
diff --git a/skywalking-sniffer/skywalking-sdk-plugin/pom.xml b/skywalking-sniffer/skywalking-sdk-plugin/pom.xml
index 0965cde9d..e47c91342 100644
--- a/skywalking-sniffer/skywalking-sdk-plugin/pom.xml
+++ b/skywalking-sniffer/skywalking-sdk-plugin/pom.xml
@@ -28,11 +28,10 @@
 	</properties>
 
 	<dependencies>
-
 		<dependency>
 			<groupId>com.a.eye</groupId>
 			<artifactId>skywalking-api</artifactId>
-			<version>2.0-2016</version>
+			<version>${project.version}</version>
 		</dependency>
 	</dependencies>
 
diff --git a/skywalking-sniffer/skywalking-toolkit-activation/pom.xml b/skywalking-sniffer/skywalking-toolkit-activation/pom.xml
new file mode 100644
index 000000000..92f8471e7
--- /dev/null
+++ b/skywalking-sniffer/skywalking-toolkit-activation/pom.xml
@@ -0,0 +1,25 @@
+<?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">
+    <parent>
+        <artifactId>skywalking-sniffer</artifactId>
+        <groupId>com.a.eye</groupId>
+        <version>2.0-2016</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <packaging>pom</packaging>
+    <modules>
+        <module>skywalking-toolkit-log4j-1.x-activation</module>
+    </modules>
+
+    <artifactId>skywalking-toolkit-activation</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.a.eye</groupId>
+            <artifactId>skywalking-api</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/pom.xml b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/pom.xml
new file mode 100644
index 000000000..f139d0faa
--- /dev/null
+++ b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/pom.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>skywalking-toolkit-activation</artifactId>
+        <groupId>com.a.eye</groupId>
+        <version>2.0-2016</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>skywalking-toolkit-log4j-1.x-activation</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.a.eye</groupId>
+            <artifactId>skywalking-toolkit-log4j-1.x</artifactId>
+            <version>${project.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/PrintTraceIdInterceptor.java b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/PrintTraceIdInterceptor.java
new file mode 100644
index 000000000..cd0228ec0
--- /dev/null
+++ b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/PrintTraceIdInterceptor.java
@@ -0,0 +1,27 @@
+package com.a.eye.skywalking.toolkit.activation.log4j.v1.x;
+
+import com.a.eye.skywalking.api.Tracing;
+import com.a.eye.skywalking.plugin.interceptor.EnhancedClassInstanceContext;
+import com.a.eye.skywalking.plugin.interceptor.enhance.InstanceMethodInvokeContext;
+import com.a.eye.skywalking.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
+import com.a.eye.skywalking.plugin.interceptor.enhance.MethodInterceptResult;
+
+/**
+ * Created by wusheng on 2016/12/7.
+ */
+public class PrintTraceIdInterceptor implements InstanceMethodsAroundInterceptor {
+    @Override
+    public void beforeMethod(EnhancedClassInstanceContext context, InstanceMethodInvokeContext interceptorContext, MethodInterceptResult result) {
+
+    }
+
+    @Override
+    public Object afterMethod(EnhancedClassInstanceContext context, InstanceMethodInvokeContext interceptorContext, Object ret) {
+        return "TID:" + Tracing.getTraceId();
+    }
+
+    @Override
+    public void handleMethodException(Throwable t, EnhancedClassInstanceContext context, InstanceMethodInvokeContext interceptorContext) {
+
+    }
+}
diff --git a/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/TraceIdPatternConverterActivation.java b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/TraceIdPatternConverterActivation.java
new file mode 100644
index 000000000..865f68899
--- /dev/null
+++ b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log4j/v1/x/TraceIdPatternConverterActivation.java
@@ -0,0 +1,37 @@
+package com.a.eye.skywalking.toolkit.activation.log4j.v1.x;
+
+import com.a.eye.skywalking.plugin.interceptor.ConstructorInterceptPoint;
+import com.a.eye.skywalking.plugin.interceptor.InstanceMethodsInterceptPoint;
+import com.a.eye.skywalking.plugin.interceptor.MethodMatcher;
+import com.a.eye.skywalking.plugin.interceptor.enhance.ClassInstanceMethodsEnhancePluginDefine;
+import com.a.eye.skywalking.plugin.interceptor.matcher.SimpleMethodMatcher;
+
+/**
+ * Created by wusheng on 2016/12/7.
+ */
+public class TraceIdPatternConverterActivation extends ClassInstanceMethodsEnhancePluginDefine {
+    @Override
+    protected String enhanceClassName() {
+        return "com.a.eye.skywalking.plugin.log.log4j.v1.x.TraceIdPatternConverter";
+    }
+
+    @Override
+    protected ConstructorInterceptPoint[] getConstructorsInterceptPoints() {
+        return null;
+    }
+
+    @Override
+    protected InstanceMethodsInterceptPoint[] getInstanceMethodsInterceptPoints() {
+        return new InstanceMethodsInterceptPoint[]{new InstanceMethodsInterceptPoint() {
+            @Override
+            public MethodMatcher[] getMethodsMatchers() {
+                return new MethodMatcher[]{new SimpleMethodMatcher("convert")};
+            }
+
+            @Override
+            public String getMethodsInterceptor() {
+                return "com.a.eye.skywalking.toolkit.activation.log4j.v1.x.PrintTraceIdInterceptor";
+            }
+        }};
+    }
+}
diff --git a/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/resources/skywalking-plugin.def b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/resources/skywalking-plugin.def
new file mode 100644
index 000000000..d4dd98271
--- /dev/null
+++ b/skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-log4j-1.x-activation/src/main/resources/skywalking-plugin.def
@@ -0,0 +1 @@
+com.a.eye.skywalking.toolkit.activation.log4j.v1.x.TraceIdPatternConverterActivation