| package org.apache.helix.webapp.resources; |
| |
| /* |
| * 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. |
| */ |
| |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.HelixProperty; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.zookeeper.datamodel.ZNRecord; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| import org.apache.helix.task.JobContext; |
| import org.apache.helix.task.TaskDriver; |
| import org.apache.helix.task.TaskUtil; |
| import org.restlet.data.MediaType; |
| import org.restlet.data.Status; |
| import org.restlet.representation.Representation; |
| import org.restlet.representation.StringRepresentation; |
| import org.restlet.representation.Variant; |
| import org.restlet.resource.ServerResource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Class for server-side resource at <code>"/clusters/{clusterName}/jobQueues/{jobQueue}/{job}" |
| * <p> |
| * <li>GET list job info |
| */ |
| public class JobResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(JobResource.class); |
| |
| public JobResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| /** |
| * List job info |
| * <p> |
| * Usage: <code>curl http://{host:port}/clusters/{clusterName}/jobQueues/{jobQueue}/{job} |
| */ |
| @Override |
| public Representation get() { |
| StringRepresentation presentation; |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| String jobQueueName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.JOB_QUEUE); |
| String jobName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.JOB); |
| |
| try { |
| presentation = getHostedEntitiesRepresentation(clusterName, jobQueueName, jobName); |
| } catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| presentation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("Fail to get job: " + jobName, e); |
| } |
| return presentation; |
| } |
| |
| |
| @Override |
| public Representation delete() { |
| StringRepresentation representation = null; |
| |
| String clusterName = ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| String jobQueueName = ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.JOB_QUEUE); |
| String jobName = ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.JOB); |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| |
| TaskDriver driver = new TaskDriver(zkClient, clusterName); |
| |
| try { |
| driver.deleteJob(jobQueueName, jobName); |
| getResponse().setStatus(Status.SUCCESS_NO_CONTENT); |
| } catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| representation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("Fail to delete job: " + jobName, e); |
| } |
| |
| return representation; |
| } |
| |
| StringRepresentation getHostedEntitiesRepresentation(String clusterName, String jobQueueName, |
| String jobName) throws Exception { |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| HelixDataAccessor accessor = |
| ClusterRepresentationUtil.getClusterDataAccessor(zkClient, clusterName); |
| PropertyKey.Builder keyBuilder = accessor.keyBuilder(); |
| |
| // Get job queue config |
| String namespacedJobName = TaskUtil.getNamespacedJobName(jobQueueName, jobName); |
| HelixProperty jobConfig = accessor.getProperty(keyBuilder.resourceConfig(namespacedJobName)); |
| |
| TaskDriver taskDriver = new TaskDriver(zkClient, clusterName); |
| |
| // Get job queue context |
| JobContext ctx = taskDriver.getJobContext(namespacedJobName); |
| |
| // Create the result |
| ZNRecord hostedEntitiesRecord = new ZNRecord(namespacedJobName); |
| if (jobConfig != null) { |
| hostedEntitiesRecord.merge(jobConfig.getRecord()); |
| } |
| if (ctx != null) { |
| hostedEntitiesRecord.merge(ctx.getRecord()); |
| } |
| |
| StringRepresentation representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(hostedEntitiesRecord), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| } |