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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.dubbo.rpc.protocol.dubbo.filter;
import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.cluster.filter.ClusterFilter;
import org.apache.dubbo.rpc.model.AsyncMethodInfo;
import org.apache.dubbo.rpc.model.ConsumerModel;
import org.apache.dubbo.rpc.model.ServiceModel;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import static org.apache.dubbo.common.constants.CommonConstants.$INVOKE;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROTOCOL_FAILED_REQUEST;
import static org.apache.dubbo.rpc.protocol.dubbo.Constants.ASYNC_METHOD_INFO;
/**
* EventFilter
*/
@Activate(group = CommonConstants.CONSUMER)
public class FutureFilter implements ClusterFilter, ClusterFilter.Listener {
protected static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(FutureFilter.class);
@Override
public Result invoke(final Invoker invoker, final Invocation invocation) throws RpcException {
fireInvokeCallback(invoker, invocation);
// need to configure if there's return value before the invocation in order to help invoker to judge if it's
// necessary to return future.
return invoker.invoke(invocation);
}
@Override
public void onResponse(Result result, Invoker invoker, Invocation invocation) {
if (result.hasException()) {
fireThrowCallback(invoker, invocation, result.getException());
} else {
fireReturnCallback(invoker, invocation, result.getValue());
}
}
@Override
public void onError(Throwable t, Invoker invoker, Invocation invocation) {
fireThrowCallback(invoker, invocation, t);
}
private void fireInvokeCallback(final Invoker invoker, final Invocation invocation) {
final AsyncMethodInfo asyncMethodInfo = getAsyncMethodInfo(invoker, invocation);
if (asyncMethodInfo == null) {
return;
}
final Method onInvokeMethod = asyncMethodInfo.getOninvokeMethod();
final Object onInvokeInst = asyncMethodInfo.getOninvokeInstance();
if (onInvokeMethod == null && onInvokeInst == null) {
return;
}
if (onInvokeMethod == null || onInvokeInst == null) {
throw new IllegalStateException("service:" + invoker.getUrl().getServiceKey() + " has a oninvoke callback config , but no such " + (onInvokeMethod == null ? "method" : "instance") + " found. url:" + invoker.getUrl());
}
if (!onInvokeMethod.isAccessible()) {
onInvokeMethod.setAccessible(true);
}
Object[] params = invocation.getArguments();
try {
onInvokeMethod.invoke(onInvokeInst, params);
} catch (InvocationTargetException e) {
fireThrowCallback(invoker, invocation, e.getTargetException());
} catch (Throwable e) {
fireThrowCallback(invoker, invocation, e);
}
}
private void fireReturnCallback(final Invoker invoker, final Invocation invocation, final Object result) {
final AsyncMethodInfo asyncMethodInfo = getAsyncMethodInfo(invoker, invocation);
if (asyncMethodInfo == null) {
return;
}
final Method onReturnMethod = asyncMethodInfo.getOnreturnMethod();
final Object onReturnInst = asyncMethodInfo.getOnreturnInstance();
//not set onreturn callback
if (onReturnMethod == null && onReturnInst == null) {
return;
}
if (onReturnMethod == null || onReturnInst == null) {
throw new IllegalStateException("service:" + invoker.getUrl().getServiceKey() + " has a onreturn callback config , but no such " + (onReturnMethod == null ? "method" : "instance") + " found. url:" + invoker.getUrl());
}
if (!onReturnMethod.isAccessible()) {
onReturnMethod.setAccessible(true);
}
Object[] args = invocation.getArguments();
Object[] params;
Class[] rParaTypes = onReturnMethod.getParameterTypes();
if (rParaTypes.length > 1) {
if (rParaTypes.length == 2 && rParaTypes[1].isAssignableFrom(Object[].class)) {
params = new Object[2];
params[0] = result;
params[1] = args;
} else {
params = new Object[args.length + 1];
params[0] = result;
System.arraycopy(args, 0, params, 1, args.length);
}
} else {
params = new Object[]{result};
}
try {
onReturnMethod.invoke(onReturnInst, params);
} catch (InvocationTargetException e) {
fireThrowCallback(invoker, invocation, e.getTargetException());
} catch (Throwable e) {
fireThrowCallback(invoker, invocation, e);
}
}
private void fireThrowCallback(final Invoker invoker, final Invocation invocation, final Throwable exception) {
final AsyncMethodInfo asyncMethodInfo = getAsyncMethodInfo(invoker, invocation);
if (asyncMethodInfo == null) {
return;
}
final Method onthrowMethod = asyncMethodInfo.getOnthrowMethod();
final Object onthrowInst = asyncMethodInfo.getOnthrowInstance();
//onthrow callback not configured
if (onthrowMethod == null && onthrowInst == null) {
return;
}
if (onthrowMethod == null || onthrowInst == null) {
throw new IllegalStateException("service:" + invoker.getUrl().getServiceKey() + " has a onthrow callback config , but no such " + (onthrowMethod == null ? "method" : "instance") + " found. url:" + invoker.getUrl());
}
if (!onthrowMethod.isAccessible()) {
onthrowMethod.setAccessible(true);
}
Class[] rParaTypes = onthrowMethod.getParameterTypes();
if (rParaTypes[0].isAssignableFrom(exception.getClass())) {
try {
Object[] args = invocation.getArguments();
Object[] params;
if (rParaTypes.length > 1) {
if (rParaTypes.length == 2 && rParaTypes[1].isAssignableFrom(Object[].class)) {
params = new Object[2];
params[0] = exception;
params[1] = args;
} else {
params = new Object[args.length + 1];
params[0] = exception;
System.arraycopy(args, 0, params, 1, args.length);
}
} else {
params = new Object[]{exception};
}
onthrowMethod.invoke(onthrowInst, params);
} catch (Throwable e) {
logger.error(PROTOCOL_FAILED_REQUEST, "", "", invocation.getMethodName() + ".call back method invoke error . callback method :" + onthrowMethod + ", url:" + invoker.getUrl(), e);
}
} else {
logger.error(PROTOCOL_FAILED_REQUEST, "", "", invocation.getMethodName() + ".call back method invoke error . callback method :" + onthrowMethod + ", url:" + invoker.getUrl(), exception);
}
}
private AsyncMethodInfo getAsyncMethodInfo(Invoker invoker, Invocation invocation) {
AsyncMethodInfo asyncMethodInfo = (AsyncMethodInfo) invocation.get(ASYNC_METHOD_INFO);
if (asyncMethodInfo != null) {
return asyncMethodInfo;
}
ServiceModel serviceModel = invocation.getServiceModel();
if (!(serviceModel instanceof ConsumerModel)) {
return null;
}
String methodName = invocation.getMethodName();
if (methodName.equals($INVOKE)) {
methodName = (String) invocation.getArguments()[0];
}
return ((ConsumerModel) serviceModel).getAsyncInfo(methodName);
}
}