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.wf;
019    
020    import org.apache.oozie.ErrorCode;
021    import org.apache.oozie.XException;
022    import org.apache.oozie.service.JPAService;
023    import org.apache.oozie.service.Services;
024    import org.apache.oozie.util.ParamChecker;
025    import org.apache.oozie.command.CommandException;
026    import org.apache.oozie.command.PreconditionException;
027    import org.apache.oozie.executor.jpa.WorkflowIdGetForExternalIdJPAExecutor;
028    
029    public class ExternalIdXCommand extends WorkflowXCommand<String> {
030        private String externalId;
031    
032        public ExternalIdXCommand(String externalId) {
033            super("externalId", "externalId", 1);
034            this.externalId = ParamChecker.notEmpty(externalId, "externalId");
035        }
036    
037        @Override
038        protected boolean isLockRequired() {
039            return false;
040        }
041    
042        @Override
043        public String getEntityKey() {
044            return this.externalId;
045        }
046    
047        @Override
048        protected void loadState() throws CommandException {
049        }
050    
051        @Override
052        protected void verifyPrecondition() throws CommandException, PreconditionException {
053        }
054    
055        @Override
056        protected String execute() throws CommandException {
057            try {
058                JPAService jpaService = Services.get().get(JPAService.class);
059                String wfId = null;
060                if (jpaService != null) {
061                    wfId = jpaService.execute(new WorkflowIdGetForExternalIdJPAExecutor(externalId));
062                }
063                else {
064                    LOG.error(ErrorCode.E0610);
065                }
066                return wfId;
067            }
068            catch (XException ex) {
069                throw new CommandException(ex);
070            }
071        }
072    
073    }