/* | |
* 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 com.alibaba.dubbo.rpc.cluster.router; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.URL; | |
import com.alibaba.dubbo.rpc.Invocation; | |
import com.alibaba.dubbo.rpc.Invoker; | |
import com.alibaba.dubbo.rpc.RpcException; | |
import com.alibaba.dubbo.rpc.cluster.Router; | |
import java.util.ArrayList; | |
import java.util.List; | |
/** | |
* A specific Router designed to realize mock feature. | |
* If a request is configured to use mock, then this router guarantees that only the invokers with protocol MOCK appear in final the invoker list, all other invokers will be excluded. | |
* | |
*/ | |
public class MockInvokersSelector implements Router { | |
@Override | |
public <T> List<Invoker<T>> route(final List<Invoker<T>> invokers, | |
URL url, final Invocation invocation) throws RpcException { | |
if (invocation.getAttachments() == null) { | |
return getNormalInvokers(invokers); | |
} else { | |
String value = invocation.getAttachments().get(Constants.INVOCATION_NEED_MOCK); | |
if (value == null) | |
return getNormalInvokers(invokers); | |
else if (Boolean.TRUE.toString().equalsIgnoreCase(value)) { | |
return getMockedInvokers(invokers); | |
} | |
} | |
return invokers; | |
} | |
private <T> List<Invoker<T>> getMockedInvokers(final List<Invoker<T>> invokers) { | |
if (!hasMockProviders(invokers)) { | |
return null; | |
} | |
List<Invoker<T>> sInvokers = new ArrayList<Invoker<T>>(1); | |
for (Invoker<T> invoker : invokers) { | |
if (invoker.getUrl().getProtocol().equals(Constants.MOCK_PROTOCOL)) { | |
sInvokers.add(invoker); | |
} | |
} | |
return sInvokers; | |
} | |
private <T> List<Invoker<T>> getNormalInvokers(final List<Invoker<T>> invokers) { | |
if (!hasMockProviders(invokers)) { | |
return invokers; | |
} else { | |
List<Invoker<T>> sInvokers = new ArrayList<Invoker<T>>(invokers.size()); | |
for (Invoker<T> invoker : invokers) { | |
if (!invoker.getUrl().getProtocol().equals(Constants.MOCK_PROTOCOL)) { | |
sInvokers.add(invoker); | |
} | |
} | |
return sInvokers; | |
} | |
} | |
private <T> boolean hasMockProviders(final List<Invoker<T>> invokers) { | |
boolean hasMockProvider = false; | |
for (Invoker<T> invoker : invokers) { | |
if (invoker.getUrl().getProtocol().equals(Constants.MOCK_PROTOCOL)) { | |
hasMockProvider = true; | |
break; | |
} | |
} | |
return hasMockProvider; | |
} | |
@Override | |
public URL getUrl() { | |
return null; | |
} | |
@Override | |
public int compareTo(Router o) { | |
return 1; | |
} | |
} |