| /*
|
| * 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.proxy; |
| |
| import java.lang.reflect.InvocationTargetException; |
| |
| import com.alibaba.dubbo.common.URL; |
| import com.alibaba.dubbo.rpc.Invoker; |
| import com.alibaba.dubbo.rpc.RpcException; |
| import com.alibaba.dubbo.rpc.Invocation; |
| import com.alibaba.dubbo.rpc.Result; |
| import com.alibaba.dubbo.rpc.RpcResult; |
| |
| /** |
| * InvokerWrapper |
| * |
| * @author william.liangf |
| */ |
| public abstract class AbstractProxyInvoker<T> implements Invoker<T> { |
| |
| private final T proxy; |
| |
| private final Class<T> type; |
| |
| private final URL url; |
| |
| public AbstractProxyInvoker(T proxy, Class<T> type, URL url){ |
| if (proxy == null) { |
| throw new IllegalArgumentException("proxy == null"); |
| } |
| if (type == null) { |
| throw new IllegalArgumentException("interface == null"); |
| } |
| if (! type.isInstance(proxy)) { |
| throw new IllegalArgumentException(proxy.getClass().getName() + " not implement interface " + type); |
| } |
| this.proxy = proxy; |
| this.type = type; |
| this.url = url; |
| } |
| |
| public Class<T> getInterface() { |
| return type; |
| } |
| |
| public URL getUrl() { |
| return url; |
| } |
| |
| public boolean isAvailable() { |
| return true; |
| } |
| |
| public void destroy() { |
| } |
| |
| public Result invoke(Invocation invocation) throws RpcException { |
| try { |
| return new RpcResult(doInvoke(proxy, invocation.getMethodName(), invocation.getParameterTypes(), invocation.getArguments())); |
| } catch (InvocationTargetException e) { |
| return new RpcResult(e.getTargetException()); |
| } catch (Throwable e) { |
| throw new RpcException("Failed to invoke remote proxy " + invocation + " to " + getUrl() + ", cause: " + e.getMessage(), e); |
| } |
| } |
| |
| protected abstract Object doInvoke(T proxy, String methodName, Class<?>[] parameterTypes, Object[] arguments) throws Throwable; |
| |
| @Override |
| public String toString() { |
| return getInterface() + " -> " + getUrl()==null?" ":getUrl().toString(); |
| } |
| |
| |
| } |