| /* |
| * 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.hbase.thrift; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.thrift.generated.Hbase; |
| import org.apache.hadoop.hbase.thrift2.generated.THBaseService; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * Converts a Hbase.Iface using InvocationHandler so that it reports process time of each call to |
| * ThriftMetrics. |
| */ |
| @InterfaceAudience.Private |
| public final class HbaseHandlerMetricsProxy implements InvocationHandler { |
| |
| private final Object handler; |
| private final ThriftMetrics metrics; |
| |
| public static Hbase.Iface newInstance(Hbase.Iface handler, ThriftMetrics metrics, |
| Configuration conf) { |
| return (Hbase.Iface) Proxy.newProxyInstance(handler.getClass().getClassLoader(), |
| new Class[] { Hbase.Iface.class }, new HbaseHandlerMetricsProxy(handler, metrics, conf)); |
| } |
| |
| // for thrift 2 |
| public static THBaseService.Iface newInstance(THBaseService.Iface handler, ThriftMetrics metrics, |
| Configuration conf) { |
| return (THBaseService.Iface) Proxy.newProxyInstance(handler.getClass().getClassLoader(), |
| new Class[] { THBaseService.Iface.class }, |
| new HbaseHandlerMetricsProxy(handler, metrics, conf)); |
| } |
| |
| private HbaseHandlerMetricsProxy(Object handler, ThriftMetrics metrics, Configuration conf) { |
| this.handler = handler; |
| this.metrics = metrics; |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method m, Object[] args) throws Throwable { |
| Object result; |
| long start = now(); |
| try { |
| result = m.invoke(handler, args); |
| } catch (InvocationTargetException e) { |
| metrics.exception(e.getCause()); |
| throw e.getTargetException(); |
| } catch (Exception e) { |
| metrics.exception(e); |
| throw new RuntimeException("unexpected invocation exception: " + e.getMessage()); |
| } finally { |
| long processTime = now() - start; |
| metrics.incMethodTime(m.getName(), processTime); |
| } |
| return result; |
| } |
| |
| private static long now() { |
| return System.nanoTime(); |
| } |
| } |