| /** |
| * 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.hadoop.yarn.server.timelineservice.storage; |
| |
| |
| import java.io.IOException; |
| import java.util.Set; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.ConnectionFactory; |
| import org.apache.hadoop.service.AbstractService; |
| import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity; |
| import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineDataToRetrieve; |
| import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineEntityFilters; |
| import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderContext; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.reader.TimelineEntityReader; |
| import org.apache.hadoop.yarn.server.timelineservice.storage.reader.TimelineEntityReaderFactory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * HBase based implementation for {@link TimelineReader}. |
| */ |
| public class HBaseTimelineReaderImpl |
| extends AbstractService implements TimelineReader { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(HBaseTimelineReaderImpl.class); |
| |
| private Configuration hbaseConf = null; |
| private Connection conn; |
| |
| public HBaseTimelineReaderImpl() { |
| super(HBaseTimelineReaderImpl.class.getName()); |
| } |
| |
| @Override |
| public void serviceInit(Configuration conf) throws Exception { |
| super.serviceInit(conf); |
| hbaseConf = HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(conf); |
| conn = ConnectionFactory.createConnection(hbaseConf); |
| } |
| |
| @Override |
| protected void serviceStop() throws Exception { |
| if (conn != null) { |
| LOG.info("closing the hbase Connection"); |
| conn.close(); |
| } |
| super.serviceStop(); |
| } |
| |
| @Override |
| public TimelineEntity getEntity(TimelineReaderContext context, |
| TimelineDataToRetrieve dataToRetrieve) throws IOException { |
| TimelineEntityReader reader = |
| TimelineEntityReaderFactory.createSingleEntityReader(context, |
| dataToRetrieve); |
| return reader.readEntity(hbaseConf, conn); |
| } |
| |
| @Override |
| public Set<TimelineEntity> getEntities(TimelineReaderContext context, |
| TimelineEntityFilters filters, TimelineDataToRetrieve dataToRetrieve) |
| throws IOException { |
| TimelineEntityReader reader = |
| TimelineEntityReaderFactory.createMultipleEntitiesReader(context, |
| filters, dataToRetrieve); |
| return reader.readEntities(hbaseConf, conn); |
| } |
| |
| @Override |
| public Set<String> getEntityTypes(TimelineReaderContext context) |
| throws IOException { |
| EntityTypeReader reader = new EntityTypeReader(context); |
| return reader.readEntityTypes(hbaseConf, conn); |
| } |
| } |