| /** |
| * 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.router.clientrm; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.Collections; |
| import java.util.Map; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeysPublic; |
| import org.apache.hadoop.ipc.Server; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.authorize.PolicyProvider; |
| import org.apache.hadoop.service.AbstractService; |
| import org.apache.hadoop.yarn.api.ApplicationClientProtocol; |
| import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.FailApplicationAttemptRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.FailApplicationAttemptResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceProfilesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceProfilesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceTypeInfoRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAllResourceTypeInfoResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptReportRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptReportResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptsResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAttributesToNodesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetAttributesToNodesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterMetricsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterMetricsResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeAttributesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeAttributesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeLabelsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodeLabelsResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetClusterNodesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetContainerReportRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetContainerReportResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetContainersRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetContainersResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetLabelsToNodesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetLabelsToNodesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNewReservationRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNewReservationResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToAttributesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToAttributesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToLabelsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetNodesToLabelsResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetQueueInfoRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetQueueInfoResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetQueueUserAclsInfoRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetQueueUserAclsInfoResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetResourceProfileRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetResourceProfileResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationDeleteRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationDeleteResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationListRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationListResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationSubmissionResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.ReservationUpdateResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.SignalContainerRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.SignalContainerResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationPriorityResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationTimeoutsRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.UpdateApplicationTimeoutsResponse; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.ipc.YarnRPC; |
| import org.apache.hadoop.yarn.server.router.RouterServerUtil; |
| import org.apache.hadoop.yarn.server.router.security.authorize.RouterPolicyProvider; |
| import org.apache.hadoop.yarn.util.LRUCacheHashMap; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.classification.VisibleForTesting; |
| |
| /** |
| * RouterClientRMService is a service that runs on each router that can be used |
| * to intercept and inspect {@link ApplicationClientProtocol} messages from |
| * client to the cluster resource manager. It listens |
| * {@link ApplicationClientProtocol} messages from the client and creates a |
| * request intercepting pipeline instance for each client. The pipeline is a |
| * chain of {@link ClientRequestInterceptor} instances that can inspect and |
| * modify the request/response as needed. The main difference with |
| * AMRMProxyService is the protocol they implement. |
| */ |
| public class RouterClientRMService extends AbstractService |
| implements ApplicationClientProtocol { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(RouterClientRMService.class); |
| |
| private Server server; |
| private InetSocketAddress listenerEndpoint; |
| |
| // For each user we store an interceptors' pipeline. |
| // For performance issue we use LRU cache to keep in memory the newest ones |
| // and remove the oldest used ones. |
| private Map<String, RequestInterceptorChainWrapper> userPipelineMap; |
| |
| public RouterClientRMService() { |
| super(RouterClientRMService.class.getName()); |
| } |
| |
| @Override |
| protected void serviceStart() throws Exception { |
| LOG.info("Starting Router ClientRMService."); |
| Configuration conf = getConfig(); |
| YarnRPC rpc = YarnRPC.create(conf); |
| UserGroupInformation.setConfiguration(conf); |
| |
| this.listenerEndpoint = |
| conf.getSocketAddr(YarnConfiguration.ROUTER_BIND_HOST, |
| YarnConfiguration.ROUTER_CLIENTRM_ADDRESS, |
| YarnConfiguration.DEFAULT_ROUTER_CLIENTRM_ADDRESS, |
| YarnConfiguration.DEFAULT_ROUTER_CLIENTRM_PORT); |
| |
| int maxCacheSize = |
| conf.getInt(YarnConfiguration.ROUTER_PIPELINE_CACHE_MAX_SIZE, |
| YarnConfiguration.DEFAULT_ROUTER_PIPELINE_CACHE_MAX_SIZE); |
| this.userPipelineMap = Collections.synchronizedMap(new LRUCacheHashMap<>(maxCacheSize, true)); |
| |
| Configuration serverConf = new Configuration(conf); |
| |
| int numWorkerThreads = |
| serverConf.getInt(YarnConfiguration.RM_CLIENT_THREAD_COUNT, |
| YarnConfiguration.DEFAULT_RM_CLIENT_THREAD_COUNT); |
| |
| this.server = rpc.getServer(ApplicationClientProtocol.class, this, |
| listenerEndpoint, serverConf, null, numWorkerThreads); |
| |
| // Enable service authorization? |
| if (conf.getBoolean( |
| CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHORIZATION, false)) { |
| refreshServiceAcls(conf, RouterPolicyProvider.getInstance()); |
| } |
| |
| this.server.start(); |
| LOG.info("Router ClientRMService listening on address: {}.", this.server.getListenerAddress()); |
| super.serviceStart(); |
| } |
| |
| @Override |
| protected void serviceStop() throws Exception { |
| LOG.info("Stopping Router ClientRMService."); |
| if (this.server != null) { |
| this.server.stop(); |
| } |
| userPipelineMap.clear(); |
| super.serviceStop(); |
| } |
| |
| @VisibleForTesting |
| public Server getServer() { |
| return this.server; |
| } |
| |
| @Override |
| public GetNewApplicationResponse getNewApplication( |
| GetNewApplicationRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getNewApplication(request); |
| } |
| |
| @Override |
| public SubmitApplicationResponse submitApplication( |
| SubmitApplicationRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().submitApplication(request); |
| } |
| |
| @Override |
| public KillApplicationResponse forceKillApplication( |
| KillApplicationRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().forceKillApplication(request); |
| } |
| |
| @Override |
| public GetClusterMetricsResponse getClusterMetrics( |
| GetClusterMetricsRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getClusterMetrics(request); |
| } |
| |
| @Override |
| public GetClusterNodesResponse getClusterNodes(GetClusterNodesRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getClusterNodes(request); |
| } |
| |
| @Override |
| public GetQueueInfoResponse getQueueInfo(GetQueueInfoRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getQueueInfo(request); |
| } |
| |
| @Override |
| public GetQueueUserAclsInfoResponse getQueueUserAcls( |
| GetQueueUserAclsInfoRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getQueueUserAcls(request); |
| } |
| |
| @Override |
| public MoveApplicationAcrossQueuesResponse moveApplicationAcrossQueues( |
| MoveApplicationAcrossQueuesRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().moveApplicationAcrossQueues(request); |
| } |
| |
| @Override |
| public GetNewReservationResponse getNewReservation( |
| GetNewReservationRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getNewReservation(request); |
| } |
| |
| @Override |
| public ReservationSubmissionResponse submitReservation( |
| ReservationSubmissionRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().submitReservation(request); |
| } |
| |
| @Override |
| public ReservationListResponse listReservations( |
| ReservationListRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().listReservations(request); |
| } |
| |
| @Override |
| public ReservationUpdateResponse updateReservation( |
| ReservationUpdateRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().updateReservation(request); |
| } |
| |
| @Override |
| public ReservationDeleteResponse deleteReservation( |
| ReservationDeleteRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().deleteReservation(request); |
| } |
| |
| @Override |
| public GetNodesToLabelsResponse getNodeToLabels( |
| GetNodesToLabelsRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getNodeToLabels(request); |
| } |
| |
| @Override |
| public GetLabelsToNodesResponse getLabelsToNodes( |
| GetLabelsToNodesRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getLabelsToNodes(request); |
| } |
| |
| @Override |
| public GetClusterNodeLabelsResponse getClusterNodeLabels( |
| GetClusterNodeLabelsRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getClusterNodeLabels(request); |
| } |
| |
| @Override |
| public GetApplicationReportResponse getApplicationReport( |
| GetApplicationReportRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getApplicationReport(request); |
| } |
| |
| @Override |
| public GetApplicationsResponse getApplications(GetApplicationsRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getApplications(request); |
| } |
| |
| @Override |
| public GetApplicationAttemptReportResponse getApplicationAttemptReport( |
| GetApplicationAttemptReportRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getApplicationAttemptReport(request); |
| } |
| |
| @Override |
| public GetApplicationAttemptsResponse getApplicationAttempts( |
| GetApplicationAttemptsRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getApplicationAttempts(request); |
| } |
| |
| @Override |
| public GetContainerReportResponse getContainerReport( |
| GetContainerReportRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getContainerReport(request); |
| } |
| |
| @Override |
| public GetContainersResponse getContainers(GetContainersRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getContainers(request); |
| } |
| |
| @Override |
| public GetDelegationTokenResponse getDelegationToken( |
| GetDelegationTokenRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getDelegationToken(request); |
| } |
| |
| @Override |
| public RenewDelegationTokenResponse renewDelegationToken( |
| RenewDelegationTokenRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().renewDelegationToken(request); |
| } |
| |
| @Override |
| public CancelDelegationTokenResponse cancelDelegationToken( |
| CancelDelegationTokenRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().cancelDelegationToken(request); |
| } |
| |
| @Override |
| public FailApplicationAttemptResponse failApplicationAttempt( |
| FailApplicationAttemptRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().failApplicationAttempt(request); |
| } |
| |
| @Override |
| public UpdateApplicationPriorityResponse updateApplicationPriority( |
| UpdateApplicationPriorityRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().updateApplicationPriority(request); |
| } |
| |
| @Override |
| public SignalContainerResponse signalToContainer( |
| SignalContainerRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().signalToContainer(request); |
| } |
| |
| @Override |
| public UpdateApplicationTimeoutsResponse updateApplicationTimeouts( |
| UpdateApplicationTimeoutsRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().updateApplicationTimeouts(request); |
| } |
| |
| @Override |
| public GetAllResourceProfilesResponse getResourceProfiles( |
| GetAllResourceProfilesRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getResourceProfiles(request); |
| } |
| |
| @Override |
| public GetResourceProfileResponse getResourceProfile( |
| GetResourceProfileRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getResourceProfile(request); |
| } |
| |
| @Override |
| public GetAllResourceTypeInfoResponse getResourceTypeInfo( |
| GetAllResourceTypeInfoRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getResourceTypeInfo(request); |
| } |
| |
| @Override |
| public GetAttributesToNodesResponse getAttributesToNodes( |
| GetAttributesToNodesRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getAttributesToNodes(request); |
| } |
| |
| @Override |
| public GetClusterNodeAttributesResponse getClusterNodeAttributes( |
| GetClusterNodeAttributesRequest request) |
| throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getClusterNodeAttributes(request); |
| } |
| |
| @Override |
| public GetNodesToAttributesResponse getNodesToAttributes( |
| GetNodesToAttributesRequest request) throws YarnException, IOException { |
| RequestInterceptorChainWrapper pipeline = getInterceptorChain(); |
| return pipeline.getRootInterceptor().getNodesToAttributes(request); |
| } |
| |
| @VisibleForTesting |
| public RequestInterceptorChainWrapper getInterceptorChain() |
| throws IOException { |
| String user = UserGroupInformation.getCurrentUser().getUserName(); |
| RequestInterceptorChainWrapper chain = userPipelineMap.get(user); |
| if (chain != null && chain.getRootInterceptor() != null) { |
| return chain; |
| } |
| return initializePipeline(user); |
| } |
| |
| void refreshServiceAcls(Configuration configuration, |
| PolicyProvider policyProvider) { |
| this.server.refreshServiceAcl(configuration, policyProvider); |
| } |
| |
| /** |
| * Gets the Request interceptor chains for all the users. |
| * |
| * @return the request interceptor chains. |
| */ |
| @VisibleForTesting |
| protected Map<String, RequestInterceptorChainWrapper> getPipelines() { |
| return this.userPipelineMap; |
| } |
| |
| /** |
| * This method creates and returns reference of the first interceptor in the |
| * chain of request interceptor instances. |
| * |
| * @return the reference of the first interceptor in the chain |
| */ |
| @VisibleForTesting |
| protected ClientRequestInterceptor createRequestInterceptorChain() { |
| Configuration conf = getConfig(); |
| return RouterServerUtil.createRequestInterceptorChain(conf, |
| YarnConfiguration.ROUTER_CLIENTRM_INTERCEPTOR_CLASS_PIPELINE, |
| YarnConfiguration.DEFAULT_ROUTER_CLIENTRM_INTERCEPTOR_CLASS, |
| ClientRequestInterceptor.class); |
| } |
| |
| /** |
| * Initializes the request interceptor pipeline for the specified application. |
| * |
| * @param user |
| */ |
| private RequestInterceptorChainWrapper initializePipeline(String user) { |
| synchronized (this.userPipelineMap) { |
| if (this.userPipelineMap.containsKey(user)) { |
| LOG.info("Request to start an already existing user: {}" |
| + " was received, so ignoring.", user); |
| return userPipelineMap.get(user); |
| } |
| |
| RequestInterceptorChainWrapper chainWrapper = |
| new RequestInterceptorChainWrapper(); |
| try { |
| // We should init the pipeline instance after it is created and then |
| // add to the map, to ensure thread safe. |
| LOG.info("Initializing request processing pipeline for application for the user: {}.", |
| user); |
| |
| ClientRequestInterceptor interceptorChain = |
| this.createRequestInterceptorChain(); |
| interceptorChain.init(user); |
| chainWrapper.init(interceptorChain); |
| } catch (Exception e) { |
| LOG.error("Init ClientRequestInterceptor error for user: {}.", user, e); |
| throw e; |
| } |
| |
| this.userPipelineMap.put(user, chainWrapper); |
| return chainWrapper; |
| } |
| } |
| |
| /** |
| * Private structure for encapsulating RequestInterceptor and user instances. |
| * |
| */ |
| @Private |
| public static class RequestInterceptorChainWrapper { |
| private ClientRequestInterceptor rootInterceptor; |
| |
| /** |
| * Initializes the wrapper with the specified parameters. |
| * |
| * @param interceptor the first interceptor in the pipeline |
| */ |
| public synchronized void init(ClientRequestInterceptor interceptor) { |
| this.rootInterceptor = interceptor; |
| } |
| |
| /** |
| * Gets the root request interceptor. |
| * |
| * @return the root request interceptor |
| */ |
| public synchronized ClientRequestInterceptor getRootInterceptor() { |
| return rootInterceptor; |
| } |
| |
| /** |
| * Shutdown the chain of interceptors when the object is destroyed. |
| */ |
| @Override |
| protected void finalize() { |
| rootInterceptor.shutdown(); |
| } |
| } |
| |
| @VisibleForTesting |
| public Map<String, RequestInterceptorChainWrapper> getUserPipelineMap() { |
| return userPipelineMap; |
| } |
| } |