/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.oozie.dependency.hcat;
import java.util.List;
import java.util.Map;
import javax.jms.Message;
import org.apache.hcatalog.messaging.AddPartitionMessage;
import org.apache.hcatalog.messaging.HCatEventMessage;
import org.apache.hcatalog.messaging.jms.MessagingUtils;
import org.apache.oozie.jms.MessageHandler;
import org.apache.oozie.service.PartitionDependencyManagerService;
import org.apache.oozie.service.Services;
import org.apache.oozie.util.XLog;
public class HCatMessageHandler implements MessageHandler {
private static XLog LOG = XLog.getLog(HCatMessageHandler.class);
private final String server;
private final PartitionDependencyManagerService pdmService;
public HCatMessageHandler(String server) {
this.server = server;
this.pdmService = Services.get().get(PartitionDependencyManagerService.class);
}
/**
* Process JMS message produced by HCat.
*
* @param msg : to be processed
*/
@Override
public void process(Message msg) {
try {
HCatEventMessage hcatMsg = MessagingUtils.getMessage(msg);
if (hcatMsg.getEventType().equals(HCatEventMessage.EventType.ADD_PARTITION)) {
// Parse msg components
AddPartitionMessage partMsg = (AddPartitionMessage) hcatMsg;
String db = partMsg.getDB();
String table = partMsg.getTable();
LOG.info("Partition available event: db [{0}] table [{1}] partitions [{2}]", db, table,
partMsg.getPartitions());
List<Map<String, String>> partitions = partMsg.getPartitions();
for (int i = 0; i < partitions.size(); i++) {
pdmService.partitionAvailable(this.server, db, table, partitions.get(i));
}
}
else {
LOG.debug("Ignoring message of event type [{0}] ", hcatMsg.getEventType());
}
}
catch (Exception e) {
LOG.warn("Error processing JMS message", e);
}
}
}