| 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.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.HelixException; |
| import org.apache.helix.HelixManager; |
| import org.apache.helix.HelixManagerFactory; |
| import org.apache.helix.HelixProperty; |
| import org.apache.helix.InstanceType; |
| 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.TaskDriver; |
| import org.apache.helix.task.Workflow; |
| import org.apache.helix.task.WorkflowConfig; |
| import org.apache.helix.webapp.RestAdminApplication; |
| 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.Parameter; |
| 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; |
| |
| public class WorkflowsResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(WorkflowsResource.class); |
| |
| public WorkflowsResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| @Override |
| public Representation get() { |
| StringRepresentation presentation = null; |
| try { |
| String clusterName = (String) getRequest().getAttributes().get("clusterName"); |
| presentation = getHostedEntitiesRepresentation(clusterName); |
| } |
| |
| catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| presentation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("", e); |
| } |
| return presentation; |
| } |
| |
| StringRepresentation getHostedEntitiesRepresentation(String clusterName) |
| throws JsonGenerationException, JsonMappingException, IOException { |
| // Get all resources |
| ZkClient zkClient = (ZkClient) getContext().getAttributes().get(RestAdminApplication.ZKCLIENT); |
| HelixDataAccessor accessor = |
| ClusterRepresentationUtil.getClusterDataAccessor(zkClient, clusterName); |
| PropertyKey.Builder keyBuilder = accessor.keyBuilder(); |
| Map<String, HelixProperty> resourceConfigMap = |
| accessor.getChildValuesMap(keyBuilder.resourceConfigs()); |
| |
| // Create the result |
| ZNRecord hostedEntitiesRecord = new ZNRecord("Workflows"); |
| |
| // Filter out non-workflow resources |
| Iterator<Map.Entry<String, HelixProperty>> it = resourceConfigMap.entrySet().iterator(); |
| while (it.hasNext()) { |
| Map.Entry<String, HelixProperty> e = it.next(); |
| HelixProperty resource = e.getValue(); |
| Map<String, String> simpleFields = resource.getRecord().getSimpleFields(); |
| if (!simpleFields.containsKey(WorkflowConfig.WorkflowConfigProperty.TargetState.name()) |
| || !simpleFields.containsKey(WorkflowConfig.WorkflowConfigProperty.Dag.name())) { |
| it.remove(); |
| } |
| } |
| |
| // Populate the result |
| List<String> allResources = Lists.newArrayList(resourceConfigMap.keySet()); |
| hostedEntitiesRecord.setListField("WorkflowList", allResources); |
| |
| StringRepresentation representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(hostedEntitiesRecord), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| @Override |
| public Representation post(Representation entity) { |
| try { |
| String clusterName = (String) getRequest().getAttributes().get("clusterName"); |
| Form form = new Form(entity); |
| |
| // Get the workflow and submit it |
| if (form.size() < 1) { |
| throw new HelixException("yaml workflow is required!"); |
| } |
| Parameter payload = form.get(0); |
| String yamlPayload = payload.getName(); |
| if (yamlPayload == null) { |
| throw new HelixException("yaml workflow is required!"); |
| } |
| String zkAddr = |
| (String) getContext().getAttributes().get(RestAdminApplication.ZKSERVERADDRESS); |
| HelixManager manager = |
| HelixManagerFactory.getZKHelixManager(clusterName, null, InstanceType.ADMINISTRATOR, |
| zkAddr); |
| manager.connect(); |
| try { |
| Workflow workflow = Workflow.parse(yamlPayload); |
| TaskDriver driver = new TaskDriver(manager); |
| driver.start(workflow); |
| } finally { |
| manager.disconnect(); |
| } |
| |
| getResponse().setEntity(getHostedEntitiesRepresentation(clusterName)); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } |
| |
| catch (Exception e) { |
| getResponse().setEntity(ClusterRepresentationUtil.getErrorAsJsonStringFromException(e), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| LOG.error("Error in posting " + entity, e); |
| } |
| return null; |
| } |
| } |