| /** |
| * 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.hadoop.ozone.client; |
| |
| import org.apache.hadoop.ozone.client.protocol.ClientProtocol; |
| import org.apache.hadoop.util.Time; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Invocation Handler for ozone client which dispatches the call to underlying |
| * ClientProtocol implementation. |
| */ |
| public class OzoneClientInvocationHandler implements InvocationHandler { |
| |
| |
| private static final Logger LOG = LoggerFactory.getLogger(OzoneClient.class); |
| private final ClientProtocol target; |
| |
| /** |
| * Constructs OzoneClientInvocationHandler with the proxy. |
| * @param target proxy to be used for method invocation. |
| */ |
| public OzoneClientInvocationHandler(ClientProtocol target) { |
| this.target = target; |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) |
| throws Throwable { |
| LOG.trace("Invoking method {} on proxy {}", method, proxy); |
| try { |
| long startTime = Time.monotonicNow(); |
| Object result = method.invoke(target, args); |
| LOG.debug("Call: {} took {} ms", method, |
| Time.monotonicNow() - startTime); |
| return result; |
| } catch(InvocationTargetException iEx) { |
| throw iEx.getCause(); |
| } |
| } |
| } |