new feature: disable plugins

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

README.md

@@ -1,4 +1,4 @@
-# ja-netfilter v2.2.1
+# ja-netfilter v2.2.2
 
 ### A javaagent framework
 
@@ -62,4 +62,5 @@ EQUAL,somedomain
     * download the jar file of the plugin
     * put it in the subdirectory called `plugins` where the ja-netfilter.jar file is located
     * enjoy the new capabilities brought by the plugin
+    * if the file suffix is `.disabled.jar`, the plugin will be disabled
    

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.ja-netfilter</groupId>
     <artifactId>ja-netfilter</artifactId>
-    <version>2.2.1</version>
+    <version>2.2.2</version>
 
     <name>ja-netfilter</name>
     <description>A javaagent framework</description>

src/main/java/com/janetfilter/core/Environment.java

@@ -15,6 +15,7 @@ public final class Environment {
     private final File pluginsDir;
     private final File logsDir;
     private final String nativePrefix;
+    private final String disabledPluginSuffix;
 
     public Environment(File agentFile) {
         this(agentFile, null);
@@ -39,6 +40,7 @@ public final class Environment {
         pid = ProcessUtils.currentId();
         version = Launcher.VERSION;
         nativePrefix = StringUtils.randomMethodName(15) + "_";
+        disabledPluginSuffix = ".disabled.jar";
     }
 
     public String getPid() {
@@ -77,6 +79,10 @@ public final class Environment {
         return nativePrefix;
     }
 
+    public String getDisabledPluginSuffix() {
+        return disabledPluginSuffix;
+    }
+
     @Override
     public String toString() {
         return "Environment: {" +
@@ -89,6 +95,7 @@ public final class Environment {
                 ", \n\tpluginsDir = " + pluginsDir +
                 ", \n\tlogsDir = " + logsDir +
                 ", \n\tnativePrefix = " + nativePrefix +
+                ", \n\tdisabledPluginSuffix = " + disabledPluginSuffix +
                 "\n}";
     }
 }

src/main/java/com/janetfilter/core/Launcher.java

@@ -12,7 +12,7 @@ import java.util.jar.JarFile;
 
 public class Launcher {
     public static final String ATTACH_ARG = "--attach";
-    public static final String VERSION = "v2.2.1";
+    public static final String VERSION = "v2.2.2";
 
     private static boolean loaded = false;
 

src/main/java/com/janetfilter/core/plugin/PluginManager.java

@@ -68,6 +68,11 @@ public final class PluginManager {
         @Override
         public void run() {
             try {
+                if (pluginFile.getName().endsWith(environment.getDisabledPluginSuffix())) {
+                    DebugInfo.debug("Disabled plugin: " + pluginFile + ", ignored.");
+                    return;
+                }
+
                 JarFile jarFile = new JarFile(pluginFile);
                 Manifest manifest = jarFile.getManifest();
                 String entryClass = manifest.getMainAttributes().getValue(ENTRY_NAME);