001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.apache.oozie.servlet;
019
020 import java.io.IOException;
021 import java.util.List;
022
023 import javax.servlet.http.HttpServletRequest;
024 import javax.servlet.http.HttpServletResponse;
025
026 import org.apache.hadoop.conf.Configuration;
027 import org.apache.oozie.DagEngine;
028 import org.apache.oozie.DagEngineException;
029 import org.apache.oozie.ErrorCode;
030 import org.apache.oozie.WorkflowJobBean;
031 import org.apache.oozie.WorkflowsInfo;
032 import org.apache.oozie.client.OozieClient;
033 import org.apache.oozie.client.rest.JsonTags;
034 import org.apache.oozie.client.rest.RestConstants;
035 import org.apache.oozie.service.DagEngineService;
036 import org.apache.oozie.service.Services;
037 import org.json.simple.JSONObject;
038
039 public class V0JobsServlet extends BaseJobsServlet {
040
041 private static final String INSTRUMENTATION_NAME = "v0jobs";
042
043 public V0JobsServlet() {
044 super(INSTRUMENTATION_NAME);
045 }
046
047
048 /**
049 * v0 service implementation to submit a workflow job
050 */
051 @Override
052 protected JSONObject submitJob(HttpServletRequest request, Configuration conf) throws XServletException, IOException {
053
054 JSONObject json = new JSONObject();
055
056 try {
057 String action = request.getParameter(RestConstants.ACTION_PARAM);
058 if (action != null && !action.equals(RestConstants.JOB_ACTION_START)) {
059 throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ErrorCode.E0303, RestConstants.ACTION_PARAM, action);
060 }
061 boolean startJob = (action != null);
062 String user = conf.get(OozieClient.USER_NAME);
063 DagEngine dagEngine = Services.get().get(DagEngineService.class).getDagEngine(user);
064 String id = dagEngine.submitJob(conf, startJob);
065 json.put(JsonTags.JOB_ID, id);
066 }
067 catch (DagEngineException ex) {
068 throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ex);
069 }
070
071 return json;
072 }
073
074 /**
075 * v0 service implementation to get a JSONObject representation of a job from its external ID
076 */
077 @Override
078 protected JSONObject getJobIdForExternalId(HttpServletRequest request, String externalId) throws XServletException, IOException {
079 JSONObject json = new JSONObject();
080 try {
081 DagEngine dagEngine = Services.get().get(DagEngineService.class)
082 .getDagEngine(getUser(request));
083 String jobId = dagEngine.getJobIdForExternalId(externalId);
084 json.put(JsonTags.JOB_ID, jobId);
085 }
086 catch (DagEngineException ex) {
087 throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ex);
088 }
089 return json;
090 }
091
092 /**
093 * v0 service implementation to get a list of workflows, with filtering or interested windows embedded in the
094 * request object
095 */
096 @Override
097 protected JSONObject getJobs(HttpServletRequest request) throws XServletException, IOException {
098 JSONObject json = new JSONObject();
099 try {
100 String filter = request.getParameter(RestConstants.JOBS_FILTER_PARAM);
101 String startStr = request.getParameter(RestConstants.OFFSET_PARAM);
102 String lenStr = request.getParameter(RestConstants.LEN_PARAM);
103 int start = (startStr != null) ? Integer.parseInt(startStr) : 1;
104 start = (start < 1) ? 1 : start;
105 int len = (lenStr != null) ? Integer.parseInt(lenStr) : 50;
106 len = (len < 1) ? 50 : len;
107 DagEngine dagEngine = Services.get().get(DagEngineService.class)
108 .getDagEngine(getUser(request));
109 WorkflowsInfo jobs = dagEngine.getJobs(filter, start, len);
110 List<WorkflowJobBean> jsonWorkflows = jobs.getWorkflows();
111 json.put(JsonTags.WORKFLOWS_JOBS, WorkflowJobBean.toJSONArray(jsonWorkflows, "GMT"));
112 json.put(JsonTags.WORKFLOWS_TOTAL, jobs.getTotal());
113 json.put(JsonTags.WORKFLOWS_OFFSET, jobs.getStart());
114 json.put(JsonTags.WORKFLOWS_LEN, jobs.getLen());
115
116 }
117 catch (DagEngineException ex) {
118 throw new XServletException(HttpServletResponse.SC_BAD_REQUEST, ex);
119 }
120
121 return json;
122 }
123 }