/*
* Copyright 2014 NAVER Corp.
*
* Licensed 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 com.navercorp.pinpoint.web.dao.hbase;
import com.navercorp.pinpoint.common.hbase.HBaseTables;
import com.navercorp.pinpoint.common.hbase.HbaseOperations2;
import com.navercorp.pinpoint.common.server.util.RowKeyUtils;
import com.navercorp.pinpoint.common.util.TimeUtils;
import com.navercorp.pinpoint.web.dao.AgentInfoDao;
import com.navercorp.pinpoint.web.mapper.AgentInfoResultsExtractor;
import com.navercorp.pinpoint.web.vo.AgentInfo;
import org.apache.commons.collections.CollectionUtils;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @author emeroad
* @author HyunGil Jeong
*/
@Repository
public class HbaseAgentInfoDao implements AgentInfoDao {
private static final int SCANNER_CACHING = 1;
@Autowired
private HbaseOperations2 hbaseOperations2;
@Autowired
private AgentInfoResultsExtractor agentInfoResultsExtractor;
/**
* Returns the very first information of the agent
*
* @param agentId
*/
@Override
public AgentInfo getInitialAgentInfo(final String agentId) {
if (agentId == null) {
throw new NullPointerException("agentId must not be null");
}
Scan scan = createScanForInitialAgentInfo(agentId);
return this.hbaseOperations2.find(HBaseTables.AGENTINFO, scan, agentInfoResultsExtractor);
}
@Override
public List<AgentInfo> getInitialAgentInfos(List<String> agentIds) {
if (CollectionUtils.isEmpty(agentIds)) {
return Collections.emptyList();
}
List<Scan> scans = new ArrayList<>(agentIds.size());
for (String agentId : agentIds) {
scans.add(createScanForInitialAgentInfo(agentId));
}
return this.hbaseOperations2.find(HBaseTables.AGENTINFO, scans, agentInfoResultsExtractor);
}
private Scan createScanForInitialAgentInfo(String agentId) {
Scan scan = new Scan();
byte[] agentIdBytes = Bytes.toBytes(agentId);
byte[] reverseStartKey = RowKeyUtils.concatFixedByteAndLong(agentIdBytes, HBaseTables.AGENT_NAME_MAX_LEN, Long.MAX_VALUE);
scan.setStartRow(reverseStartKey);
scan.setReversed(true);
scan.setMaxVersions(1);
scan.setCaching(SCANNER_CACHING);
return scan;
}
/**
* Returns the information of the agent with its start time closest to the given timestamp
*
* @param agentId
* @param timestamp
* @return
*/
@Override
public AgentInfo getAgentInfo(final String agentId, final long timestamp) {
if (agentId == null) {
throw new NullPointerException("agentId must not be null");
}
Scan scan = createScan(agentId, timestamp);
return this.hbaseOperations2.find(HBaseTables.AGENTINFO, scan, agentInfoResultsExtractor);
}
@Override
public List<AgentInfo> getAgentInfos(List<String> agentIds, long timestamp) {
if (CollectionUtils.isEmpty(agentIds)) {
return Collections.emptyList();
}
List<Scan> scans = new ArrayList<>(agentIds.size());
for (String agentId : agentIds) {
scans.add(createScan(agentId, timestamp));
}
return this.hbaseOperations2.findParallel(HBaseTables.AGENTINFO, scans, agentInfoResultsExtractor);
}
private Scan createScan(String agentId, long currentTime) {
Scan scan = new Scan();
byte[] agentIdBytes = Bytes.toBytes(agentId);
long startTime = TimeUtils.reverseTimeMillis(currentTime);
byte[] startKeyBytes = RowKeyUtils.concatFixedByteAndLong(agentIdBytes, HBaseTables.AGENT_NAME_MAX_LEN, startTime);
byte[] endKeyBytes = RowKeyUtils.concatFixedByteAndLong(agentIdBytes, HBaseTables.AGENT_NAME_MAX_LEN, Long.MAX_VALUE);
scan.setStartRow(startKeyBytes);
scan.setStopRow(endKeyBytes);
scan.addFamily(HBaseTables.AGENTINFO_CF_INFO);
scan.setMaxVersions(1);
scan.setCaching(SCANNER_CACHING);
return scan;
}
}