/* * 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.listener; import java.util.List; import com.alibaba.dubbo.common.URL; import com.alibaba.dubbo.common.logger.Logger; import com.alibaba.dubbo.common.logger.LoggerFactory; import com.alibaba.dubbo.rpc.Invoker; import com.alibaba.dubbo.rpc.InvokerListener; import com.alibaba.dubbo.rpc.RpcException; import com.alibaba.dubbo.rpc.Invocation; import com.alibaba.dubbo.rpc.Result; /** * ListenerInvoker * * @author william.liangf */ public class ListenerInvokerWrapper<T> implements Invoker<T> { private static final Logger logger = LoggerFactory.getLogger(ListenerInvokerWrapper.class); private final Invoker<T> invoker; private final List<InvokerListener> listeners; public ListenerInvokerWrapper(Invoker<T> invoker, List<InvokerListener> listeners){ if (invoker == null) { throw new IllegalArgumentException("invoker == null"); } this.invoker = invoker; this.listeners = listeners; if (listeners != null && listeners.size() > 0) { for (InvokerListener listener : listeners) { if (listener != null) { try { listener.referred(invoker); } catch (Throwable t) { logger.error(t.getMessage(), t); } } } } } public Class<T> getInterface() { return invoker.getInterface(); } public URL getUrl() { return invoker.getUrl(); } public boolean isAvailable() { return invoker.isAvailable(); } public Result invoke(Invocation invocation) throws RpcException { return invoker.invoke(invocation); } @Override public String toString() { return getInterface() + " -> " + getUrl()==null?" ":getUrl().toString(); } public void destroy() { try { invoker.destroy(); } finally { if (listeners != null && listeners.size() > 0) { for (InvokerListener listener : listeners) { if (listener != null) { try { listener.destroyed(invoker); } catch (Throwable t) { logger.error(t.getMessage(), t); } } } } } } }