Incorporate Liam code review

[policy/engine.git] / PolicyEngineAPI / src / main / java / org / onap / policy / std / AutoClientEnd.java

diff --git a/PolicyEngineAPI/src/main/java/org/onap/policy/std/AutoClientEnd.java b/PolicyEngineAPI/src/main/java/org/onap/policy/std/AutoClientEnd.java
index 9f9dc37..00c8c5f 100644 (file)
--- a/PolicyEngineAPI/src/main/java/org/onap/policy/std/AutoClientEnd.java
+++ b/PolicyEngineAPI/src/main/java/org/onap/policy/std/AutoClientEnd.java
@@ -21,7 +21,9 @@
 package org.onap.policy.std;
 
 import java.net.URI;
-import javax.websocket.ClientEndpoint;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
 import org.java_websocket.client.WebSocketClient;
 import org.java_websocket.handshake.ServerHandshake;
 import org.onap.policy.api.NotificationHandler;
@@ -32,7 +34,6 @@ import org.onap.policy.common.logging.flexlogger.FlexLogger;
 import org.onap.policy.common.logging.flexlogger.Logger;
 import org.onap.policy.xacml.api.XACMLErrorConstants;
 
-@ClientEndpoint
 public class AutoClientEnd extends WebSocketClient {
     private static StdPDPNotification notification = null;
     private static StdPDPNotification oldNotification = null;
@@ -42,8 +43,9 @@ public class AutoClientEnd extends WebSocketClient {
     private static String url = null;
     private static boolean status = false;
     private static boolean stop = false;
-    private static boolean message = false;
     private static boolean error = false;
+    private static boolean restartNeeded = false;
+    private static ScheduledExecutorService restartExecutorService = null;
     private static Logger logger = FlexLogger.getLogger(AutoClientEnd.class.getName());
 
     private AutoClientEnd(URI serverUri) {
@@ -53,7 +55,6 @@ public class AutoClientEnd extends WebSocketClient {
     @Override
     public void onMessage(String msg) {
         logger.info("Received Auto Notification from : " + getURI() + ", Notification: " + msg);
-        AutoClientEnd.message = true;
         try {
             AutoClientEnd.notification = NotificationUnMarshal.notificationJSON(msg);
         } catch (Exception e) {
@@ -68,45 +69,38 @@ public class AutoClientEnd extends WebSocketClient {
             AutoClientEnd.oldNotification = AutoClientEnd.notification;
             callHandler();
         }
-
-        AutoClientEnd.message = false;
     }
 
     @Override
     public void onClose(int code, String reason, boolean remote) {
         logger.info("AutoClientEnd disconnected from: " + getURI() + "; Code: " + code + ", reason :  " + reason);
-        if (!AutoClientEnd.stop && !AutoClientEnd.message) {
-            // This Block of code is executed if there is any Network Failure or
-            // if the Notification is Down.
-            logger.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + "Disconnected from Notification Server");
-            AutoClientEnd.client = null;
-            AutoClientEnd.status = false;
-            // Try to connect Back to available PDP.
-            AutoClientEnd.error = true;
-            start(url);
-        }
-        AutoClientEnd.message = false;
+        AutoClientEnd.restartNeeded = true;
     }
 
     @Override
     public void onError(Exception ex) {
         logger.error("XACMLErrorConstants.ERROR_PROCESS_FLOW + Error connecting to: " + getURI()
                 + ", Exception occured ...\n" + ex);
-        // trying to Restart by self.
-        stop();
-        if (AutoClientEnd.url != null) {
-            AutoClientEnd.client = null;
-            AutoClientEnd.status = false;
-            AutoClientEnd.error = true;
-            AutoClientEnd.start(AutoClientEnd.url);
-        }
+        AutoClientEnd.restartNeeded = true;
     }
 
     @Override
     public void onOpen(ServerHandshake arg0) {
+        restartNeeded = false;
         logger.info("Auto Notification Session Started... " + getURI());
     }
 
+    private static void restart() {
+        try {
+            if (client != null && restartNeeded && !stop) {
+                logger.info("Auto Notification Session Restarting ... " + getUrl());
+                client.reconnect();
+            }
+        } catch (Exception e) {
+            logger.info("Auto Notification Session Error Started... " + getUrl());
+        }
+    }
+
     /**
      * Sets the auto.
      *
@@ -156,6 +150,10 @@ public class AutoClientEnd extends WebSocketClient {
             client = new AutoClientEnd(new URI(url + "notifications"));
             client.connect();
             status = true;
+            restartExecutorService = Executors.newSingleThreadScheduledExecutor();
+            Runnable task = AutoClientEnd::restart;
+            restartExecutorService.scheduleAtFixedRate(task, 60, 60, TimeUnit.SECONDS);
+
             if (error) {
                 // will not trigger. leave it in to later add checks
                 // The URL's will be in Sync according to design Spec.
@@ -171,7 +169,6 @@ public class AutoClientEnd extends WebSocketClient {
             }
         } catch (Exception e) {
             logger.error(XACMLErrorConstants.ERROR_SYSTEM_ERROR + e);
-            client = null;
             status = false;
             changeUrl();
         }
@@ -179,6 +176,7 @@ public class AutoClientEnd extends WebSocketClient {
 
     private static void changeUrl() {
         // Change the PDP if it is not Up.
+        stop();
         StdPolicyEngine.rotatePDPList();
         start(StdPolicyEngine.getPDPURL());
     }
@@ -192,15 +190,25 @@ public class AutoClientEnd extends WebSocketClient {
         }
         logger.info("\n Closing Auto Notification WebSocket Connection.. ");
         stop = true;
+        // first stop the restart service
+        try {
+            restartExecutorService.shutdown();
+        } catch (Exception e1) {
+            logger.info("\n AutoClientEnd: Error stoppping the restart Scheduler ");
+        }
+
+        // close the connection
         try {
             client.closeBlocking();
-        } catch (InterruptedException e) {
-            logger.info("\n Error Closing Auto Notification WebSocket Connection.. InterruptedException");
+        } catch (Exception e) {
+            logger.error("\n ERROR Closing Auto Notification WebSocket Connection.. ");
         }
+
         logger.info("\n Closed the Auto Notification WebSocket Connection.. ");
         client = null;
         status = false;
         stop = false;
+        restartNeeded = false;
     }
 
     private static void callHandler() {