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, getAuthToken(request));
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), getAuthToken(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), getAuthToken(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    }