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CLOUDSTACK-6859:Management Server PermGen run out of memory after some 

time due to class leak.

(cherry picked from commit 25580c7cd1)
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	framework/ipc/src/org/apache/cloudstack/framework/async/AsyncCallbackDispatcher.java
This commit is contained in:
Min Chen 2014-06-06 23:44:30 -07:00 committed by Rohit Yadav
parent 122332b326
commit 4e3ac55a0e
1 changed files with 60 additions and 40 deletions
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100
framework/ipc/src/org/apache/cloudstack/framework/async/AsyncCallbackDispatcher.java
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@ -21,10 +21,11 @@ package org.apache.cloudstack.framework.async;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.CallbackFilter;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.Factory;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
@ -35,53 +36,72 @@ public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
private static final Logger s_logger = Logger.getLogger(AsyncCallbackDispatcher.class);
private Method _callbackMethod;
private final T _targetObject;
private Object _contextObject;
private Object _resultObject;
private AsyncCallbackDriver _driver = new InplaceAsyncCallbackDriver();
private final T _targetObject;
private Object _contextObject;
private Object _resultObject;
private AsyncCallbackDriver _driver = new InplaceAsyncCallbackDriver();
private static Map<Class, Enhancer> enMap = new HashMap<Class, Enhancer>();
private AsyncCallbackDispatcher(T target) {
assert(target != null);
_targetObject = target;
}
private AsyncCallbackDispatcher(T target) {
assert (target != null);
_targetObject = target;
}
public AsyncCallbackDispatcher<T, R> attachDriver(AsyncCallbackDriver driver) {
assert(driver != null);
_driver = driver;
public AsyncCallbackDispatcher<T, R> attachDriver(AsyncCallbackDriver driver) {
assert (driver != null);
_driver = driver;
return this;
}
return this;
}
public Method getCallbackMethod() {
return _callbackMethod;
}
public Method getCallbackMethod() {
return _callbackMethod;
}
@SuppressWarnings("unchecked")
public T getTarget() {
Enhancer en = new Enhancer();
@SuppressWarnings("unchecked")
public T getTarget() {
Class<?> clz = _targetObject.getClass();
String clzName = clz.getName();
if (clzName.contains("EnhancerByCloudStack"))
clz = clz.getSuperclass();
Class<?> clz = _targetObject.getClass();
String clzName = clz.getName();
if(clzName.contains("EnhancerByCloudStack"))
clz = clz.getSuperclass();
en.setSuperclass(clz);
en.setCallbacks(new Callback[]{new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2,
MethodProxy arg3) throws Throwable {
_callbackMethod = arg1;
_callbackMethod.setAccessible(true);
return null;
}
},
new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2,
MethodProxy arg3) throws Throwable {
return null;
Enhancer en = null;
synchronized (enMap) {
en = enMap.get(clz);
if (en == null) {
en = new Enhancer();
en.setSuperclass(clz);
en.setCallback(new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2, MethodProxy arg3) throws Throwable {
return null;
}
});
enMap.put(clz, en);
}
}
try {
T t = (T)en.create();
Factory factory = (Factory)t;
factory.setCallback(0, new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2, MethodProxy arg3) throws Throwable {
if (arg1.getParameterTypes().length == 0 && arg1.getName().equals("finalize")) {
return null;
} else {
_callbackMethod = arg1;
_callbackMethod.setAccessible(true);
return null;
}
}
});
return t;
} catch (Throwable e) {
s_logger.error("Unexpected exception", e);
}
});
en.setCallbackFilter(new CallbackFilter() {
@Override