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 java.util.List;
021    
022    import org.apache.oozie.CoordinatorActionBean;
023    import org.apache.oozie.CoordinatorJobBean;
024    import org.apache.oozie.ErrorCode;
025    import org.apache.oozie.client.CoordinatorAction;
026    import org.apache.oozie.client.Job;
027    import org.apache.oozie.command.CommandException;
028    import org.apache.oozie.command.PreconditionException;
029    import org.apache.oozie.executor.jpa.CoordJobGetReadyActionsJPAExecutor;
030    import org.apache.oozie.executor.jpa.CoordJobGetRunningActionsCountJPAExecutor;
031    import org.apache.oozie.executor.jpa.JPAExecutorException;
032    import org.apache.oozie.service.JPAService;
033    import org.apache.oozie.service.Services;
034    import org.apache.oozie.util.LogUtils;
035    import org.apache.oozie.util.XLog;
036    
037    public class CoordActionReadyXCommand extends CoordinatorXCommand<Void> {
038        private final String jobId;
039        private final XLog log = getLog();
040        private CoordinatorJobBean coordJob = null;
041        private JPAService jpaService = null;
042    
043        public CoordActionReadyXCommand(String id) {
044            super("coord_action_ready", "coord_action_ready", 1);
045            this.jobId = id;
046        }
047    
048        @Override
049        /**
050         * Check for READY actions and change state to SUBMITTED by a command to submit the job to WF engine.
051         * This method checks all the actions associated with a jobId to figure out which actions
052         * to start (based on concurrency and execution order [FIFO, LIFO, LAST_ONLY])
053         *
054         */
055        protected Void execute() throws CommandException {
056            // number of actions to start (-1 means start ALL)
057            int numActionsToStart = -1;
058    
059            // get execution setting for this job (FIFO, LIFO, LAST_ONLY)
060            String jobExecution = coordJob.getExecution();
061            // get concurrency setting for this job
062            int jobConcurrency = coordJob.getConcurrency();
063            // if less than 0, then UNLIMITED concurrency
064            if (jobConcurrency >= 0) {
065                // count number of actions that are already RUNNING or SUBMITTED
066                // subtract from CONCURRENCY to calculate number of actions to start
067                // in WF engine
068    
069                int numRunningJobs;
070                try {
071                    numRunningJobs = jpaService.execute(new CoordJobGetRunningActionsCountJPAExecutor(jobId));
072                }
073                catch (JPAExecutorException je) {
074                    throw new CommandException(je);
075                }
076    
077                numActionsToStart = jobConcurrency - numRunningJobs;
078                if (numActionsToStart < 0) {
079                    numActionsToStart = 0;
080                }
081                log.debug("concurrency=" + jobConcurrency + ", execution=" + jobExecution + ", numRunningJobs="
082                        + numRunningJobs + ", numLeftover=" + numActionsToStart);
083                // no actions to start
084                if (numActionsToStart == 0) {
085                    log.warn("No actions to start! for jobId=" + jobId);
086                    return null;
087                }
088            }
089            // get list of actions that are READY and fit in the concurrency and execution
090    
091            List<CoordinatorActionBean> actions;
092            try {
093                actions = jpaService.execute(new CoordJobGetReadyActionsJPAExecutor(jobId, numActionsToStart, jobExecution));
094            }
095            catch (JPAExecutorException je) {
096                throw new CommandException(je);
097            }
098            log.debug("Number of READY actions = " + actions.size());
099            String user = coordJob.getUser();
100            // make sure auth token is not null
101            // log.denug("user=" + user + ", token=" + authToken);
102            int counter = 0;
103            for (CoordinatorActionBean action : actions) {
104                // continue if numActionsToStart is negative (no limit on number of
105                // actions), or if the counter is less than numActionsToStart
106                if ((numActionsToStart < 0) || (counter < numActionsToStart)) {
107                    log.debug("Set status to SUBMITTED for id: " + action.getId());
108                    // change state of action to SUBMITTED
109                    action.setStatus(CoordinatorAction.Status.SUBMITTED);
110                    // queue action to start action
111                    queue(new CoordActionStartXCommand(action.getId(), user, coordJob.getAppName(),
112                            action.getJobId()), 100);
113                    try {
114                        jpaService.execute(new org.apache.oozie.executor.jpa.CoordActionUpdateStatusJPAExecutor(action));
115                    }
116                    catch (JPAExecutorException je) {
117                        throw new CommandException(je);
118                    }
119                }
120                else {
121                    break;
122                }
123                counter++;
124    
125            }
126            return null;
127        }
128    
129        @Override
130        public String getEntityKey() {
131            return jobId;
132        }
133    
134        @Override
135        public String getKey() {
136            return getName() + "_" + jobId;
137        }
138    
139        @Override
140        protected boolean isLockRequired() {
141            return true;
142        }
143    
144        @Override
145        protected void loadState() throws CommandException {
146            jpaService = Services.get().get(JPAService.class);
147            if (jpaService == null) {
148                throw new CommandException(ErrorCode.E0610);
149            }
150            try {
151                coordJob = jpaService.execute(new org.apache.oozie.executor.jpa.CoordJobGetJPAExecutor(jobId));
152            }
153            catch (JPAExecutorException e) {
154                throw new CommandException(e);
155            }
156            LogUtils.setLogInfo(coordJob, logInfo);
157        }
158    
159        @Override
160        protected void verifyPrecondition() throws CommandException, PreconditionException {
161            if (coordJob.getStatus() != Job.Status.RUNNING && coordJob.getStatus() != Job.Status.RUNNINGWITHERROR && coordJob.getStatus() != Job.Status.SUCCEEDED && coordJob.getStatus() != Job.Status.PAUSED && coordJob.getStatus() != Job.Status.PAUSEDWITHERROR) {
162                throw new PreconditionException(ErrorCode.E1100, "[" + jobId
163                        + "]::CoordActionReady:: Ignoring job. Coordinator job is not in RUNNING state, but state="
164                        + coordJob.getStatus());
165            }
166        }
167    }