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.dependency.hcat; 019 020 import java.util.List; 021 import java.util.Map; 022 023 import javax.jms.Message; 024 025 import org.apache.hcatalog.messaging.AddPartitionMessage; 026 import org.apache.hcatalog.messaging.HCatEventMessage; 027 import org.apache.hcatalog.messaging.jms.MessagingUtils; 028 import org.apache.oozie.jms.MessageHandler; 029 import org.apache.oozie.service.PartitionDependencyManagerService; 030 import org.apache.oozie.service.Services; 031 import org.apache.oozie.util.XLog; 032 033 public class HCatMessageHandler implements MessageHandler { 034 035 private static XLog LOG = XLog.getLog(HCatMessageHandler.class); 036 037 private final String server; 038 private final PartitionDependencyManagerService pdmService; 039 040 public HCatMessageHandler(String server) { 041 this.server = server; 042 this.pdmService = Services.get().get(PartitionDependencyManagerService.class); 043 } 044 045 /** 046 * Process JMS message produced by HCat. 047 * 048 * @param msg : to be processed 049 */ 050 @Override 051 public void process(Message msg) { 052 try { 053 HCatEventMessage hcatMsg = MessagingUtils.getMessage(msg); 054 if (hcatMsg.getEventType().equals(HCatEventMessage.EventType.ADD_PARTITION)) { 055 // Parse msg components 056 AddPartitionMessage partMsg = (AddPartitionMessage) hcatMsg; 057 String db = partMsg.getDB(); 058 String table = partMsg.getTable(); 059 LOG.info("Partition available event: db [{0}] table [{1}] partitions [{2}]", db, table, 060 partMsg.getPartitions()); 061 List<Map<String, String>> partitions = partMsg.getPartitions(); 062 for (int i = 0; i < partitions.size(); i++) { 063 pdmService.partitionAvailable(this.server, db, table, partitions.get(i)); 064 } 065 } 066 else { 067 LOG.debug("Ignoring message of event type [{0}] ", hcatMsg.getEventType()); 068 } 069 } 070 catch (Exception e) { 071 LOG.warn("Error processing JMS message", e); 072 } 073 } 074 075 }