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.command.coord;
019    
020    import org.apache.oozie.CoordinatorJobBean;
021    import org.apache.oozie.client.CoordinatorJob;
022    import org.apache.oozie.client.Job;
023    import org.apache.oozie.command.CommandException;
024    import org.apache.oozie.command.PauseTransitionXCommand;
025    import org.apache.oozie.command.PreconditionException;
026    import org.apache.oozie.command.bundle.BundleStatusUpdateXCommand;
027    import org.apache.oozie.executor.jpa.CoordJobUpdateJPAExecutor;
028    import org.apache.oozie.executor.jpa.JPAExecutorException;
029    import org.apache.oozie.service.JPAService;
030    import org.apache.oozie.service.Services;
031    import org.apache.oozie.util.LogUtils;
032    
033    public class CoordPauseXCommand extends PauseTransitionXCommand {
034        private final JPAService jpaService = Services.get().get(JPAService.class);
035        private final CoordinatorJobBean coordJob;
036        private CoordinatorJob.Status prevStatus = null;
037    
038        public CoordPauseXCommand(CoordinatorJobBean coordJob) {
039            super("coord_pause", "coord_pause", 1);
040            this.coordJob = coordJob;
041        }
042    
043        /* (non-Javadoc)
044         * @see org.apache.oozie.command.XCommand#getEntityKey()
045         */
046        @Override
047        public String getEntityKey() {
048            return coordJob.getId();
049        }
050    
051        /* (non-Javadoc)
052         * @see org.apache.oozie.command.XCommand#isLockRequired()
053         */
054        @Override
055        protected boolean isLockRequired() {
056            return true;
057        }
058    
059        /* (non-Javadoc)
060         * @see org.apache.oozie.command.XCommand#loadState()
061         */
062        @Override
063        public void loadState() throws CommandException {
064            prevStatus = coordJob.getStatus();
065            LogUtils.setLogInfo(coordJob, logInfo);
066        }
067    
068        /* (non-Javadoc)
069         * @see org.apache.oozie.command.XCommand#verifyPrecondition()
070         */
071        @Override
072        protected void verifyPrecondition() throws CommandException, PreconditionException {
073        }
074    
075        /* (non-Javadoc)
076         * @see org.apache.oozie.command.TransitionXCommand#notifyParent()
077         */
078        @Override
079        public void notifyParent() throws CommandException {
080            // update bundle action
081            if (coordJob.getBundleId() != null) {
082                BundleStatusUpdateXCommand bundleStatusUpdate = new BundleStatusUpdateXCommand(coordJob, prevStatus);
083                bundleStatusUpdate.call();
084            }
085        }
086    
087        /* (non-Javadoc)
088         * @see org.apache.oozie.command.TransitionXCommand#getJob()
089         */
090        @Override
091        public Job getJob() {
092            return coordJob;
093        }
094    
095        /* (non-Javadoc)
096         * @see org.apache.oozie.command.TransitionXCommand#updateJob()
097         */
098        @Override
099        public void updateJob() throws CommandException {
100            try {
101                jpaService.execute(new CoordJobUpdateJPAExecutor(coordJob));
102            }
103            catch (JPAExecutorException e) {
104                throw new CommandException(e);
105            }
106        }
107    
108        @Override
109        public void pauseChildren() throws CommandException {
110            // TODO - need revisit when revisiting coord job status redesign;
111    
112        }
113    
114        @Override
115        public void performWrites() throws CommandException {
116        }
117    
118    }