/* | |
* Copyright 1999-2011 Alibaba Group. | |
* | |
* Licensed 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.protocol; | |
import java.util.ArrayList; | |
import java.util.Collections; | |
import java.util.List; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.ExtensionLoader; | |
import com.alibaba.dubbo.common.URL; | |
import com.alibaba.dubbo.common.utils.ConfigUtils; | |
import com.alibaba.dubbo.rpc.Exporter; | |
import com.alibaba.dubbo.rpc.ExporterListener; | |
import com.alibaba.dubbo.rpc.Filter; | |
import com.alibaba.dubbo.rpc.Invoker; | |
import com.alibaba.dubbo.rpc.InvokerListener; | |
import com.alibaba.dubbo.rpc.Protocol; | |
import com.alibaba.dubbo.rpc.RpcConstants; | |
import com.alibaba.dubbo.rpc.RpcException; | |
import com.alibaba.dubbo.rpc.listener.ListenerExporterWrapper; | |
import com.alibaba.dubbo.rpc.listener.ListenerInvokerWrapper; | |
/** | |
* ListenerProtocol | |
* | |
* @author william.liangf | |
*/ | |
public class ProtocolListenerWrapper implements Protocol { | |
private final Protocol protocol; | |
public ProtocolListenerWrapper(Protocol protocol){ | |
if (protocol == null) { | |
throw new IllegalArgumentException("protocol == null"); | |
} | |
this.protocol = protocol; | |
} | |
public int getDefaultPort() { | |
return protocol.getDefaultPort(); | |
} | |
public <T> Exporter<T> export(Invoker<T> invoker) throws RpcException { | |
if (Constants.REGISTRY_PROTOCOL.equals(invoker.getUrl().getProtocol())) { | |
return protocol.export(invoker); | |
} | |
return new ListenerExporterWrapper<T>(protocol.export(invoker), | |
buildServiceListeners(invoker.getUrl().getParameter(Constants.EXPORTER_LISTENER_KEY), RpcConstants.DEFAULT_EXPORTER_LISTENERS)); | |
} | |
public <T> Invoker<T> refer(Class<T> type, URL url) throws RpcException { | |
if (Constants.REGISTRY_PROTOCOL.equals(url.getProtocol())) { | |
return protocol.refer(type, url); | |
} | |
return new ListenerInvokerWrapper<T>(protocol.refer(type, url), | |
buildReferenceListeners(url.getParameter(Constants.INVOKER_LISTENER_KEY), RpcConstants.DEFAULT_INVOKER_LISTENERS)); | |
} | |
public void destroy() { | |
protocol.destroy(); | |
} | |
private static List<ExporterListener> buildServiceListeners(String config, List<String> defaults) { | |
List<String> names = ConfigUtils.mergeValues(Filter.class, config, defaults); | |
List<ExporterListener> listeners = new ArrayList<ExporterListener>(); | |
if (names.size() > 0) { | |
for (String name : names) { | |
listeners.add(ExtensionLoader.getExtensionLoader(ExporterListener.class).getExtension(name)); | |
} | |
} | |
return Collections.unmodifiableList(listeners); | |
} | |
private static List<InvokerListener> buildReferenceListeners(String config, List<String> defaults) { | |
List<String> names = ConfigUtils.mergeValues(Filter.class, config, defaults); | |
List<InvokerListener> listeners = new ArrayList<InvokerListener>(); | |
if (names.size() > 0) { | |
for (String name : names) { | |
listeners.add(ExtensionLoader.getExtensionLoader(InvokerListener.class).getExtension(name)); | |
} | |
} | |
return Collections.unmodifiableList(listeners); | |
} | |
} |