Add feature to alert in case of agent reconnected.

README.md

@@ -7,7 +7,8 @@
 	- Agent의 Memory (warning / fatal)
 	- Agent의 Disk (warning / fatal)
 	- 신규 Agent 연결
-	- Agent의 연결 해제 (연결 해제된 Agent의 재접속은 Scouter Server 내부 이슈로 지연)
+	- Agent의 연결 해제
+	- Agent의 재접속
 
 ### Properties (스카우터 서버 설치 경로 하위의 conf/scouter.conf)
 * **_ext\_plugin\_email\_send_alert_** : Email 발송 여부 (true / false) - 기본 값은 false
@@ -38,7 +39,7 @@ ext_plugin_email_to_address=receiver1@scouter.com,receiver2@scouter.com
 ext_plugin_email_cc_address=ccreceiver@yopmail.com
 ```
 
-### dependencies
+### Dependencies
 * Project
     - scouter.common
     - scouter.server

src/scouter/plugin/server/alert/email/EmailPlugin.java

@@ -138,34 +138,35 @@ public void run() {
 
 	@ServerPlugin(PluginConstants.PLUGIN_SERVER_OBJECT)
 	public void object(ObjectPack pack) {
-		if (pack.version != null && pack.version.length() > 0) {
-			AlertPack p = null;
-			if (pack.wakeup == 0L) {
+    	if (pack.version != null && pack.version.length() > 0) {
+			AlertPack ap = null;
+			ObjectPack op = AgentManager.getAgent(pack.objHash);
+
+			if (op == null && pack.wakeup == 0L) {
 				// in case of new agent connected
-				p = new AlertPack();
-		        p.level = AlertLevel.INFO;
-		        p.objHash = pack.objHash;
-		        p.title = "An object has been activated.";
-		        p.message = pack.objName + " is connected.";
-		        p.time = System.currentTimeMillis();
-		        p.objType = "scouter";
+				ap = new AlertPack();
+		        ap.level = AlertLevel.INFO;
+		        ap.objHash = pack.objHash;
+		        ap.title = "An object has been activated.";
+		        ap.message = pack.objName + " is connected.";
+		        ap.time = System.currentTimeMillis();
+		        ap.objType = "scouter";
 
-		        alert(p);
-			} else if (pack.alive == false) {
+		        alert(ap);
+	    	} else if (op.alive == false) {
 				// in case of agent reconnected
-				p = new AlertPack();
-		        p.level = AlertLevel.INFO;
-		        p.objHash = pack.objHash;
-		        p.title = "An object has been activated.";
-		        p.message = pack.objName + " is reconnected.";
-		        p.time = System.currentTimeMillis();
-		        p.objType = "scouter";
+				ap = new AlertPack();
+		        ap.level = AlertLevel.INFO;
+		        ap.objHash = pack.objHash;
+		        ap.title = "An object has been activated.";
+		        ap.message = pack.objName + " is reconnected.";
+		        ap.time = System.currentTimeMillis();
+		        ap.objType = "scouter";
 
-		        alert(p);
-			}
-
+		        alert(ap);
+	    	}
 			// inactive state can be handled in alert() method.
-		}
+    	}
 	}
 
     private void println(Object o) {