org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
Show all versions of dubbo Show documentation
The all in one project of dubbo
/*
* 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.cluster.support.wrapper;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.rpc.AsyncRpcResult;
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.RpcInvocation;
import org.apache.dubbo.rpc.cluster.ClusterInvoker;
import org.apache.dubbo.rpc.cluster.Directory;
import org.apache.dubbo.rpc.support.MockInvoker;
import java.util.List;
import static org.apache.dubbo.rpc.Constants.MOCK_KEY;
import static org.apache.dubbo.rpc.cluster.Constants.INVOCATION_NEED_MOCK;
public class MockClusterInvoker implements ClusterInvoker {
private static final Logger logger = LoggerFactory.getLogger(MockClusterInvoker.class);
private final Directory directory;
private final Invoker invoker;
public MockClusterInvoker(Directory directory, Invoker invoker) {
this.directory = directory;
this.invoker = invoker;
}
@Override
public URL getUrl() {
return directory.getConsumerUrl();
}
public URL getRegistryUrl() {
return directory.getUrl();
}
@Override
public Directory getDirectory() {
return directory;
}
@Override
public boolean isDestroyed() {
return directory.isDestroyed();
}
@Override
public boolean isAvailable() {
return directory.isAvailable();
}
@Override
public void destroy() {
//directory need destroy, because do not have directory manager, so who get the directory need destroy
//directory need support destroy multi times
//other ClusterInvoker maybe also have directory, so it also destroy
this.directory.destroy();
this.invoker.destroy();
}
@Override
public Class getInterface() {
return directory.getInterface();
}
@Override
public Result invoke(Invocation invocation) throws RpcException {
Result result = null;
String value = getUrl().getMethodParameter(invocation.getMethodName(), MOCK_KEY, Boolean.FALSE.toString()).trim();
if (value.length() == 0 || "false".equalsIgnoreCase(value)) {
//no mock
result = this.invoker.invoke(invocation);
} else if (value.startsWith("force")) {
if (logger.isWarnEnabled()) {
logger.warn("force-mock: " + invocation.getMethodName() + " force-mock enabled , url : " + getUrl());
}
//force:direct mock
result = doMockInvoke(invocation, null);
} else {
//fail-mock
try {
result = this.invoker.invoke(invocation);
//fix:#4585
if(result.getException() instanceof RpcException){
RpcException rpcException= (RpcException)result.getException();
if(rpcException.isBiz()){
throw rpcException;
}else {
result = doMockInvoke(invocation, rpcException);
}
}
} catch (RpcException e) {
if (e.isBiz()) {
throw e;
}
if (logger.isWarnEnabled()) {
logger.warn("fail-mock: " + invocation.getMethodName() + " fail-mock enabled , url : " + getUrl(), e);
}
result = doMockInvoke(invocation, e);
}
}
return result;
}
@SuppressWarnings({"unchecked", "rawtypes"})
private Result doMockInvoke(Invocation invocation, RpcException e) {
Result result = null;
Invoker minvoker;
List> mockInvokers = selectMockInvoker(invocation);
if (CollectionUtils.isEmpty(mockInvokers)) {
minvoker = (Invoker) new MockInvoker(getUrl(), directory.getInterface());
} else {
minvoker = mockInvokers.get(0);
}
try {
result = minvoker.invoke(invocation);
} catch (RpcException me) {
if (me.isBiz()) {
result = AsyncRpcResult.newDefaultAsyncResult(me.getCause(), invocation);
} else {
throw new RpcException(me.getCode(), getMockExceptionMessage(e, me), me.getCause());
}
} catch (Throwable me) {
throw new RpcException(getMockExceptionMessage(e, me), me.getCause());
}
return result;
}
private String getMockExceptionMessage(Throwable t, Throwable mt) {
String msg = "mock error : " + mt.getMessage();
if (t != null) {
msg = msg + ", invoke error is :" + StringUtils.toString(t);
}
return msg;
}
/**
* Return MockInvoker
* Contract：
* directory.list() will return a list of normal invokers if Constants.INVOCATION_NEED_MOCK is absent or not true in invocation, otherwise, a list of mock invokers will return.
* if directory.list() returns more than one mock invoker, only one of them will be used.
*
* @param invocation
* @return
*/
private List> selectMockInvoker(Invocation invocation) {
List> invokers = null;
//TODO generic invoker？
if (invocation instanceof RpcInvocation) {
//Note the implicit contract (although the description is added to the interface declaration, but extensibility is a problem. The practice placed in the attachment needs to be improved)
((RpcInvocation) invocation).setAttachment(INVOCATION_NEED_MOCK, Boolean.TRUE.toString());
//directory will return a list of normal invokers if Constants.INVOCATION_NEED_MOCK is absent or not true in invocation, otherwise, a list of mock invokers will return.
try {
invokers = directory.list(invocation);
} catch (RpcException e) {
if (logger.isInfoEnabled()) {
logger.info("Exception when try to invoke mock. Get mock invokers error for service:"
+ getUrl().getServiceInterface() + ", method:" + invocation.getMethodName()
+ ", will construct a new mock with 'new MockInvoker()'.", e);
}
}
}
return invokers;
}
@Override
public String toString() {
return "invoker :" + this.invoker + ",directory: " + this.directory;
}
}