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.CoordinatorActionBean;
021    import org.apache.oozie.ErrorCode;
022    import org.apache.oozie.command.CommandException;
023    import org.apache.oozie.command.PreconditionException;
024    import org.apache.oozie.executor.jpa.CoordActionGetJPAExecutor;
025    import org.apache.oozie.executor.jpa.JPAExecutorException;
026    import org.apache.oozie.service.JPAService;
027    import org.apache.oozie.service.Services;
028    import org.apache.oozie.util.ParamChecker;
029    
030    public class CoordActionInfoXCommand extends CoordinatorXCommand<CoordinatorActionBean> {
031        /**
032         * This class gets the Coordinator action info based on coordinator action id.
033         */
034        private final String id;
035    
036        public CoordActionInfoXCommand(String id) {
037            super("action.info", "action.info", 1);
038            this.id = ParamChecker.notEmpty(id, "id");
039        }
040    
041        /* (non-Javadoc)
042         * @see org.apache.oozie.command.XCommand#execute()
043         */
044        @Override
045        protected CoordinatorActionBean execute() throws CommandException {
046            JPAService jpaService = Services.get().get(JPAService.class);
047            if (jpaService != null) {
048                CoordinatorActionBean action;
049                try {
050                    action = jpaService.execute(new CoordActionGetJPAExecutor(this.id));
051                }
052                catch (JPAExecutorException e) {
053                    throw new CommandException(e);
054                }
055                return action;
056            }
057            else {
058                LOG.error(ErrorCode.E0610);
059                return null;
060            }
061        }
062    
063        /* (non-Javadoc)
064         * @see org.apache.oozie.command.XCommand#getEntityKey()
065         */
066        @Override
067        protected String getEntityKey() {
068            return null;
069        }
070    
071        /* (non-Javadoc)
072         * @see org.apache.oozie.command.XCommand#loadState()
073         */
074        @Override
075        protected void loadState() throws CommandException {
076        }
077    
078        /* (non-Javadoc)
079         * @see org.apache.oozie.command.XCommand#verifyPrecondition()
080         */
081        @Override
082        protected void verifyPrecondition() throws CommandException, PreconditionException {
083        }
084    
085        /* (non-Javadoc)
086         * @see org.apache.oozie.command.XCommand#isLockRequired()
087         */
088        @Override
089        protected boolean isLockRequired() {
090            return false;
091        }
092    }