| 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 java.io.IOException; |
| import java.net.InetAddress; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.UUID; |
| |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.HelixException; |
| import org.apache.helix.InstanceType; |
| import org.apache.helix.PropertyPathBuilder; |
| import org.apache.helix.PropertyType; |
| import org.apache.helix.manager.zk.DefaultSchedulerMessageHandlerFactory; |
| import org.apache.helix.manager.zk.ZkClient; |
| import org.apache.helix.model.LiveInstance; |
| import org.apache.helix.model.Message; |
| import org.apache.helix.model.Message.MessageType; |
| import org.apache.helix.tools.ClusterSetup; |
| import org.apache.helix.webapp.RestAdminApplication; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.codehaus.jackson.JsonGenerationException; |
| import org.codehaus.jackson.map.JsonMappingException; |
| import org.restlet.data.Form; |
| 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; |
| |
| /** |
| * This resource can be used to send scheduler tasks to the controller. |
| */ |
| public class SchedulerTasksResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(SchedulerTasksResource.class); |
| |
| public static String CRITERIA = "Criteria"; |
| public static String MESSAGETEMPLATE = "MessageTemplate"; |
| public static String TASKQUEUENAME = "TaskQueueName"; |
| |
| public SchedulerTasksResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| @Override |
| public Representation get() { |
| StringRepresentation presentation = null; |
| try { |
| presentation = getSchedulerTasksRepresentation(); |
| } |
| |
| catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| presentation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("", e); |
| } |
| return presentation; |
| } |
| |
| StringRepresentation getSchedulerTasksRepresentation() throws JsonGenerationException, |
| JsonMappingException, IOException { |
| String clusterName = (String) getRequest().getAttributes().get("clusterName"); |
| String instanceName = (String) getRequest().getAttributes().get("instanceName"); |
| ZkClient zkClient = (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkClient); |
| List<String> instances = |
| setupTool.getClusterManagementTool().getInstancesInCluster(clusterName); |
| |
| HelixDataAccessor accessor = |
| ClusterRepresentationUtil.getClusterDataAccessor(zkClient, clusterName); |
| LiveInstance liveInstance = |
| accessor.getProperty(accessor.keyBuilder().liveInstance(instanceName)); |
| String sessionId = liveInstance.getEphemeralOwner(); |
| |
| StringRepresentation representation = new StringRepresentation("");// (ClusterRepresentationUtil.ObjectToJson(instanceConfigs), |
| // MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| @Override |
| public Representation post(Representation entity) { |
| try { |
| String clusterName = (String) getRequest().getAttributes().get("clusterName"); |
| Form form = new Form(entity); |
| ZkClient zkClient = |
| (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT); |
| |
| String msgTemplateString = |
| ClusterRepresentationUtil.getFormJsonParameterString(form, MESSAGETEMPLATE); |
| if (msgTemplateString == null) { |
| throw new HelixException("SchedulerTasksResource need to have MessageTemplate specified."); |
| } |
| Map<String, String> messageTemplate = |
| ClusterRepresentationUtil.getFormJsonParameters(form, MESSAGETEMPLATE); |
| |
| String criteriaString = ClusterRepresentationUtil.getFormJsonParameterString(form, CRITERIA); |
| if (criteriaString == null) { |
| throw new HelixException("SchedulerTasksResource need to have Criteria specified."); |
| } |
| HelixDataAccessor accessor = |
| ClusterRepresentationUtil.getClusterDataAccessor(zkClient, clusterName); |
| LiveInstance leader = accessor.getProperty(accessor.keyBuilder().controllerLeader()); |
| if (leader == null) { |
| throw new HelixException("There is no leader for the cluster " + clusterName); |
| } |
| |
| Message schedulerMessage = |
| new Message(MessageType.SCHEDULER_MSG, UUID.randomUUID().toString()); |
| schedulerMessage.getRecord().getSimpleFields().put(CRITERIA, criteriaString); |
| |
| schedulerMessage.getRecord().getMapFields().put(MESSAGETEMPLATE, messageTemplate); |
| |
| schedulerMessage.setTgtSessionId(leader.getEphemeralOwner()); |
| schedulerMessage.setTgtName("CONTROLLER"); |
| schedulerMessage.setSrcInstanceType(InstanceType.CONTROLLER); |
| String taskQueueName = |
| ClusterRepresentationUtil.getFormJsonParameterString(form, TASKQUEUENAME); |
| if (taskQueueName != null && taskQueueName.length() > 0) { |
| schedulerMessage.getRecord().setSimpleField( |
| DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE, taskQueueName); |
| } |
| accessor.setProperty(accessor.keyBuilder().controllerMessage(schedulerMessage.getMsgId()), |
| schedulerMessage); |
| |
| Map<String, String> resultMap = new HashMap<String, String>(); |
| resultMap.put("StatusUpdatePath", PropertyPathBuilder.controllerStatusUpdate( |
| clusterName, MessageType.SCHEDULER_MSG.name(), schedulerMessage.getMsgId())); |
| resultMap.put("MessageType", Message.MessageType.SCHEDULER_MSG.name()); |
| resultMap.put("MsgId", schedulerMessage.getMsgId()); |
| |
| // Assemble the rest URL for task status update |
| String ipAddress = InetAddress.getLocalHost().getCanonicalHostName(); |
| String url = |
| "http://" + ipAddress + ":" + getContext().getAttributes().get(RestAdminApplication.PORT) |
| + "/clusters/" + clusterName + "/Controller/statusUpdates/SCHEDULER_MSG/" |
| + schedulerMessage.getMsgId(); |
| resultMap.put("statusUpdateUrl", url); |
| |
| getResponse().setEntity(ClusterRepresentationUtil.ObjectToJson(resultMap), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } catch (Exception e) { |
| getResponse().setEntity(ClusterRepresentationUtil.getErrorAsJsonStringFromException(e), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| LOG.error("", e); |
| } |
| return null; |
| } |
| } |