apache/cloudstack
1
0
Fork 0
mirror of https://github.com/apache/cloudstack.git synced 2025-11-02 20:02:29 +01:00
Code Issues Packages Projects Releases Wiki Activity

Work around an issue in using IPC callback for

Browse Source 
HypervisorTemplateAdapter.
This commit is contained in:
Min Chen 2013-05-06 15:10:31 -07:00
parent 2e28515624
commit db65dfbb12
1 changed files with 34 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
framework/ipc/src/org/apache/cloudstack/framework/async/AsyncCallbackDispatcher.java
View File

@ -22,6 +22,8 @@ package org.apache.cloudstack.framework.async;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.log4j.Logger;
import net.sf.cglib.proxy.CallbackFilter;
import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.Enhancer;
@ -30,32 +32,40 @@ import net.sf.cglib.proxy.MethodProxy;
@SuppressWarnings("rawtypes")
public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
private Method _callbackMethod;
private static final Logger s_logger = Logger.getLogger(AsyncCallbackDispatcher.class);
private Method _callbackMethod;
private T _targetObject;
private Object _contextObject;
private Object _resultObject;
private AsyncCallbackDriver _driver = new InplaceAsyncCallbackDriver();
private AsyncCallbackDriver _driver = new InplaceAsyncCallbackDriver();
private AsyncCallbackDispatcher(T target) {
assert(target != null);
_targetObject = target;
}
public AsyncCallbackDispatcher<T, R> attachDriver(AsyncCallbackDriver driver) {
assert(driver != null);
_driver = driver;
return this;
}
public Method getCallbackMethod() {
return _callbackMethod;
}
@SuppressWarnings("unchecked")
public T getTarget() {
Enhancer en = new Enhancer();
en.setSuperclass(_targetObject.getClass());
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,
@ -64,7 +74,7 @@ public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
_callbackMethod.setAccessible(true);
return null;
}
},
},
new MethodInterceptor() {
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2,
@ -81,23 +91,30 @@ public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
return 0;
}}
);
return (T)en.create();
try {
return (T)en.create();
} catch(Throwable e) {
s_logger.error("Unexpected exception", e);
}
return null;
}
public AsyncCallbackDispatcher<T, R> setCallback(Object useless) {
return this;
}
public AsyncCallbackDispatcher<T, R> setContext(Object context) {
_contextObject = context;
return this;
}
@SuppressWarnings("unchecked")
public <P> P getContext() {
return (P)_contextObject;
}
public void complete(Object resultObject) {
_resultObject = resultObject;
_driver.performCompletionCallback(this);
@ -112,15 +129,15 @@ public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
Object getTargetObject() {
return _targetObject;
}
public static <P, R> AsyncCallbackDispatcher<P, R> create(P target) {
return new AsyncCallbackDispatcher<P, R>(target);
}
public static boolean dispatch(Object target, AsyncCallbackDispatcher callback) {
assert(callback != null);
assert(target != null);
try {
callback.getCallbackMethod().invoke(target, callback, callback.getContext());
} catch (IllegalArgumentException e) {
@ -130,7 +147,7 @@ public class AsyncCallbackDispatcher<T, R> implements AsyncCompletionCallback {
} catch (InvocationTargetException e) {
throw new RuntimeException("InvocationTargetException when invoking RPC callback for command: " + callback.getCallbackMethod().getName(), e);
}
return true;
}
}