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    import java.util.Map;
022    
023    import org.apache.oozie.ErrorCode;
024    import org.apache.oozie.SLAEventBean;
025    import org.apache.oozie.XException;
026    import org.apache.oozie.command.CommandException;
027    import org.apache.oozie.command.PreconditionException;
028    import org.apache.oozie.command.XCommand;
029    import org.apache.oozie.executor.jpa.SLAEventsGetForFilterJPAExecutor;
030    import org.apache.oozie.service.JPAService;
031    import org.apache.oozie.service.Service;
032    import org.apache.oozie.service.Services;
033    
034    /**
035     * The command to get a list of SLAEvents which are greater than given seqId.
036     *
037     */
038    @SuppressWarnings("deprecation")
039    public class SLAEventsXCommand extends XCommand<List<SLAEventBean>> {
040    
041        private long seqId = 0;
042        private int maxNoEvents = 100; // Default
043        private long lastSeqId = -1;
044        private final Map<String, List<String>> filter;
045    
046        public static final String SLA_DEFAULT_MAXEVENTS = Service.CONF_PREFIX + "sla.default.maxevents";
047    
048        public SLAEventsXCommand(long seqId, int maxNoEvnts, Map<String, List<String>> filter) {
049            super("SLAEventsXCommand", "SLAEventsXCommand", 1);
050            this.seqId = seqId;
051            int sysMax = Services.get().getConf().getInt(SLA_DEFAULT_MAXEVENTS, 1000);
052            this.maxNoEvents = maxNoEvnts > sysMax ? sysMax : maxNoEvnts;
053            this.filter = filter;
054        }
055    
056        @Override
057        protected boolean isLockRequired() {
058            return false;
059        }
060    
061        @Override
062        public String getEntityKey() {
063            return Long.toString(seqId);
064        }
065    
066        @Override
067        protected void loadState() throws CommandException {
068        }
069    
070        @Override
071        protected void verifyPrecondition() throws CommandException, PreconditionException {
072        }
073    
074        @Override
075        protected List<SLAEventBean> execute() throws CommandException {
076            try {
077                JPAService jpaService = Services.get().get(JPAService.class);
078                List<SLAEventBean> slaEventList = null;
079                long lastSeqId[] = new long[1];
080                if (jpaService != null) {
081                    slaEventList = jpaService.execute(new SLAEventsGetForFilterJPAExecutor(seqId, maxNoEvents, filter, lastSeqId));
082                }
083                else {
084                    LOG.error(ErrorCode.E0610);
085                }
086                setLastSeqId(lastSeqId[0]);
087                return slaEventList;
088            }
089            catch (XException ex) {
090                throw new CommandException(ex);
091            }
092        }
093    
094        /**
095         * Set lastSeqId
096         *
097         * @param lastSeqId
098         */
099        public void setLastSeqId(long lastSeqId) {
100            this.lastSeqId = lastSeqId;
101        }
102    
103        /**
104         * Get lastSeqId
105         *
106         * @return lastSeqId
107         */
108        public long getLastSeqId() {
109            return lastSeqId;
110        }
111    
112    }