| /* |
| * 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.hive.metastore; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.lang.reflect.UndeclaredThrowableException; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.commons.lang3.ClassUtils; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.metastore.api.MetaException; |
| import org.apache.hadoop.hive.metastore.conf.MetastoreConf; |
| import org.apache.hadoop.hive.metastore.utils.JavaUtils; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class RawStoreProxy implements InvocationHandler { |
| |
| private final RawStore base; |
| private final MetaStoreInit.MetaStoreInitData metaStoreInitData = |
| new MetaStoreInit.MetaStoreInitData(); |
| private final Configuration hiveConf; |
| private final Configuration conf; // thread local conf from HMS |
| private final long socketTimeout; |
| |
| protected RawStoreProxy(Configuration hiveConf, Configuration conf, |
| Class<? extends RawStore> rawStoreClass, int id) throws MetaException { |
| this.conf = conf; |
| this.hiveConf = hiveConf; |
| this.socketTimeout = MetastoreConf.getTimeVar(hiveConf, |
| MetastoreConf.ConfVars.CLIENT_SOCKET_TIMEOUT, TimeUnit.MILLISECONDS); |
| |
| // This has to be called before initializing the instance of RawStore |
| init(); |
| |
| this.base = ReflectionUtils.newInstance(rawStoreClass, conf); |
| } |
| |
| public static RawStore getProxy(Configuration hiveConf, Configuration conf, String rawStoreClassName, |
| int id) throws MetaException { |
| |
| Class<? extends RawStore> baseClass = JavaUtils.getClass(rawStoreClassName, RawStore.class); |
| |
| RawStoreProxy handler = new RawStoreProxy(hiveConf, conf, baseClass, id); |
| |
| // Look for interfaces on both the class and all base classes. |
| return (RawStore) Proxy.newProxyInstance(RawStoreProxy.class.getClassLoader(), |
| getAllInterfaces(baseClass), handler); |
| } |
| |
| private static Class<?>[] getAllInterfaces(Class<?> baseClass) { |
| List interfaces = ClassUtils.getAllInterfaces(baseClass); |
| Class<?>[] result = new Class<?>[interfaces.size()]; |
| int i = 0; |
| for (Object o : interfaces) { |
| result[i++] = (Class<?>)o; |
| } |
| return result; |
| } |
| |
| private void init() throws MetaException { |
| // Using the hook on startup ensures that the hook always has priority |
| // over settings in *.xml. The thread local conf needs to be used because at this point |
| // it has already been initialized using conf. |
| MetaStoreInit.updateConnectionURL(hiveConf, getConf(), null, metaStoreInitData); |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| try { |
| Deadline.registerIfNot(socketTimeout); |
| boolean isTimerStarted = Deadline.startTimer(method.getName()); |
| try { |
| return method.invoke(base, args); |
| } finally { |
| if (isTimerStarted) { |
| Deadline.stopTimer(); |
| } |
| } |
| } catch (UndeclaredThrowableException e) { |
| throw e.getCause(); |
| } catch (InvocationTargetException e) { |
| throw e.getCause(); |
| } |
| } |
| |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| } |