From ae52867be48d864e4641a61e50799588ac427f4e Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@cloud.com>
Date: Thu, 29 Sep 2011 12:17:45 -0700
Subject: [PATCH] Add no-args constructor for
 ClusterSyncCommand/ClusterSyncAnswer

Otherwise they can't be deserialized.

Fix the following exception on KVM host:

ERROR [agent.transport.Request] (Agent-Handler-2:null)
Caught problem with
[{"ClusterSyncCommand":{"_interval":60,"_skipSteps":20,"_steps":0,"_clusterId":2,"contextMap":{},"wait":0}}]
com.google.gson.JsonParseException: The JsonDeserializer
com.cloud.agent.transport.ArrayTypeAdaptor@44ed904 failed to deserialized json
object
[{"ClusterSyncCommand":{"_interval":60,"_skipSteps":20,"_steps":0,"_clusterId":2,"contextMap":{},"wait":0}}]
given the type class [Lcom.cloud.agent.api.Command;
...
Caused by: java.lang.RuntimeException: No-args constructor for class
com.cloud.agent.api.ClusterSyncCommand does not exist. Register an
InstanceCreator with Gson for this type to fix this problem.
        at
com.google.gson.MappedObjectConstructor.constructWithNoArgConstructor(MappedObjectConstructor.java:64)
...
---
 api/src/com/cloud/agent/api/ClusterSyncAnswer.java  | 2 ++
 api/src/com/cloud/agent/api/ClusterSyncCommand.java | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/api/src/com/cloud/agent/api/ClusterSyncAnswer.java b/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
index c39927668da..927f857e5db 100644
--- a/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
+++ b/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
@@ -31,6 +31,8 @@ public class ClusterSyncAnswer extends Answer {
     public static final int FULL_SYNC=0;
     public static final int DELTA_SYNC=1;
     
+    public ClusterSyncAnswer() {
+    }
     
     public ClusterSyncAnswer(long clusterId, HashMap<String, Pair<String, State>> newStates, int type){
         _clusterId = clusterId;
diff --git a/api/src/com/cloud/agent/api/ClusterSyncCommand.java b/api/src/com/cloud/agent/api/ClusterSyncCommand.java
index 17b66d1a9e4..9a6b009cc0a 100644
--- a/api/src/com/cloud/agent/api/ClusterSyncCommand.java
+++ b/api/src/com/cloud/agent/api/ClusterSyncCommand.java
@@ -28,6 +28,8 @@ public class ClusterSyncCommand extends Command implements CronCommand {
 
     long _clusterId;
     
+    public ClusterSyncCommand() {
+    }
     
     public ClusterSyncCommand(int interval, int skipSteps, long clusterId){
         _interval = interval;