improve ArthasAgent API. #1471

arthas-agent-attach/src/main/java/com/taobao/arthas/agent/attach/ArthasAgent.java

@@ -32,7 +32,15 @@ public class ArthasAgent {
     private Instrumentation instrumentation;
 
     public ArthasAgent() {
+        this(null, null, false, null);
+    }
+
+    public ArthasAgent(Map<String, String> configMap) {
+        this(configMap, null, false, null);
+    }
 
+    public ArthasAgent(String arthasHome) {
+        this(null, arthasHome, false, null);
     }
 
     public ArthasAgent(Map<String, String> configMap, String arthasHome, boolean slientInit,
@@ -47,6 +55,22 @@ public class ArthasAgent {
         new ArthasAgent().init();
     }
 
+    /**
+     * @see https://arthas.aliyun.com/doc/arthas-properties.html
+     * @param configMap
+     */
+    public static void attach(Map<String, String> configMap) {
+        new ArthasAgent(configMap).init();
+    }
+
+    /**
+     * use the specified arthas
+     * @param arthasHome arthas directory
+     */
+    public static void attach(String arthasHome) {
+        new ArthasAgent().init();
+    }
+
     public void init() throws IllegalStateException {
         // 尝试判断arthas是否已在运行，如果是的话，直接就退出
         try {