1. update the version of ja-netfilter

2. add example of global transformer

Signed-off-by: pengzhile <pengzhile@gmail.com>

pom.xml

@@ -68,7 +68,7 @@
         <dependency>
             <groupId>com.ja-netfilter</groupId>
             <artifactId>ja-netfilter</artifactId>
-            <version>2.2.0</version>
+            <version>2.2.1</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>

src/main/java/my/sample/plugin/GlobalTransformer.java

@@ -0,0 +1,35 @@
+package my.sample.plugin;
+
+import com.janetfilter.core.commons.DebugInfo;
+import com.janetfilter.core.plugin.MyTransformer;
+
+public class GlobalTransformer implements MyTransformer {
+    @Override
+    public String getHookClassName() {
+        return null;
+    }
+
+    @Override
+    public void before(String className, byte[] classBytes) throws Exception {
+        DebugInfo.debug("before transform: " + className);
+    }
+
+    @Override
+    public byte[] preTransform(String className, byte[] classBytes, int order) throws Exception {
+        DebugInfo.debug("pre transform: " + className + ", order: " + order);
+
+        return classBytes;
+    }
+
+    @Override
+    public byte[] postTransform(String className, byte[] classBytes, int order) throws Exception {
+        DebugInfo.debug("post transform: " + className + ", order: " + order);
+
+        return classBytes;
+    }
+
+    @Override
+    public void after(String className, byte[] classBytes) throws Exception {
+        DebugInfo.debug("pre transform: " + className);
+    }
+}

src/main/java/my/sample/plugin/MyPluginEntry.java

@@ -11,6 +11,7 @@ public class MyPluginEntry implements PluginEntry {
 
     public MyPluginEntry() {
         transformers.add(new TestTransformer());
+        transformers.add(new GlobalTransformer());
     }
 
     @Override