| /** |
| * 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.yarn.server.nodemanager.amrmproxy; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import com.google.common.base.Preconditions; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.server.api.protocolrecords.DistributedSchedulingAllocateRequest; |
| import org.apache.hadoop.yarn.server.api.protocolrecords.DistributedSchedulingAllocateResponse; |
| import org.apache.hadoop.yarn.server.api.protocolrecords.RegisterDistributedSchedulingAMResponse; |
| import org.apache.hadoop.yarn.server.nodemanager.recovery.NMStateStoreService; |
| |
| /** |
| * Implements the RequestInterceptor interface and provides common functionality |
| * which can can be used and/or extended by other concrete intercepter classes. |
| * |
| */ |
| public abstract class AbstractRequestInterceptor implements |
| RequestInterceptor { |
| private Configuration conf; |
| private AMRMProxyApplicationContext appContext; |
| private RequestInterceptor nextInterceptor; |
| |
| /** |
| * Sets the {@link RequestInterceptor} in the chain. |
| */ |
| @Override |
| public void setNextInterceptor(RequestInterceptor nextInterceptor) { |
| this.nextInterceptor = nextInterceptor; |
| } |
| |
| /** |
| * Sets the {@link Configuration}. |
| */ |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.setConf(conf); |
| } |
| } |
| |
| /** |
| * Gets the {@link Configuration}. |
| */ |
| @Override |
| public Configuration getConf() { |
| return this.conf; |
| } |
| |
| /** |
| * Initializes the {@link RequestInterceptor}. |
| */ |
| @Override |
| public void init(AMRMProxyApplicationContext appContext) { |
| Preconditions.checkState(this.appContext == null, |
| "init is called multiple times on this interceptor: " |
| + this.getClass().getName()); |
| this.appContext = appContext; |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.init(appContext); |
| } |
| } |
| |
| /** |
| * Recover {@link RequestInterceptor} state from store. |
| */ |
| @Override |
| public void recover(Map<String, byte[]> recoveredDataMap) { |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.recover(recoveredDataMap); |
| } |
| } |
| |
| /** |
| * Disposes the {@link RequestInterceptor}. |
| */ |
| @Override |
| public void shutdown() { |
| if (this.nextInterceptor != null) { |
| this.nextInterceptor.shutdown(); |
| } |
| } |
| |
| /** |
| * Gets the next {@link RequestInterceptor} in the chain. |
| */ |
| @Override |
| public RequestInterceptor getNextInterceptor() { |
| return this.nextInterceptor; |
| } |
| |
| /** |
| * Gets the {@link AMRMProxyApplicationContext}. |
| */ |
| public AMRMProxyApplicationContext getApplicationContext() { |
| return this.appContext; |
| } |
| |
| /** |
| * Default implementation that invokes the distributed scheduling version |
| * of the register method. |
| * |
| * @param request ApplicationMaster allocate request |
| * @return Distribtued Scheduler Allocate Response |
| * @throws YarnException if fails |
| * @throws IOException if fails |
| */ |
| @Override |
| public DistributedSchedulingAllocateResponse allocateForDistributedScheduling( |
| DistributedSchedulingAllocateRequest request) |
| throws YarnException, IOException { |
| return (this.nextInterceptor != null) ? |
| this.nextInterceptor.allocateForDistributedScheduling(request) : null; |
| } |
| |
| /** |
| * Default implementation that invokes the distributed scheduling version |
| * of the allocate method. |
| * |
| * @param request ApplicationMaster registration request |
| * @return Distributed Scheduler Register Response |
| * @throws YarnException if fails |
| * @throws IOException if fails |
| */ |
| @Override |
| public RegisterDistributedSchedulingAMResponse |
| registerApplicationMasterForDistributedScheduling( |
| RegisterApplicationMasterRequest request) |
| throws YarnException, IOException { |
| return (this.nextInterceptor != null) ? this.nextInterceptor |
| .registerApplicationMasterForDistributedScheduling(request) : null; |
| } |
| |
| /** |
| * A helper method for getting NM state store. |
| * |
| * @return the NMSS instance |
| */ |
| public NMStateStoreService getNMStateStore() { |
| if (this.appContext == null || this.appContext.getNMCotext() == null) { |
| return null; |
| } |
| return this.appContext.getNMCotext().getNMStateStore(); |
| } |
| } |