package org.apache.helix.healthcheck;
/*
* 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.
*/
import java.util.LinkedList;
import java.util.Map;
import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.ZNRecord;
import org.apache.helix.alerts.StatsHolder;
import org.apache.helix.model.HealthStat;
import org.apache.log4j.Logger;
public class ParticipantHealthReportCollectorImpl implements ParticipantHealthReportCollector {
private final LinkedList<HealthReportProvider> _healthReportProviderList =
new LinkedList<HealthReportProvider>();
private static final Logger _logger = Logger
.getLogger(ParticipantHealthReportCollectorImpl.class);
private final HelixManager _helixManager;
String _instanceName;
public ParticipantHealthReportCollectorImpl(HelixManager helixManager, String instanceName) {
_helixManager = helixManager;
_instanceName = instanceName;
addDefaultHealthCheckInfoProvider();
}
private void addDefaultHealthCheckInfoProvider() {
addHealthReportProvider(new DefaultHealthReportProvider());
}
@Override
public void addHealthReportProvider(HealthReportProvider provider) {
try {
synchronized (_healthReportProviderList) {
if (!_healthReportProviderList.contains(provider)) {
_healthReportProviderList.add(provider);
} else {
_logger.warn("Skipping a duplicated HealthCheckInfoProvider");
}
}
} catch (Exception e) {
_logger.error(e);
}
}
@Override
public void removeHealthReportProvider(HealthReportProvider provider) {
synchronized (_healthReportProviderList) {
if (_healthReportProviderList.contains(provider)) {
_healthReportProviderList.remove(provider);
} else {
_logger.warn("Skip removing a non-exist HealthCheckInfoProvider");
}
}
}
@Override
public void reportHealthReportMessage(ZNRecord healthCheckInfoUpdate) {
HelixDataAccessor accessor = _helixManager.getHelixDataAccessor();
Builder keyBuilder = accessor.keyBuilder();
accessor.setProperty(keyBuilder.healthReport(_instanceName, healthCheckInfoUpdate.getId()),
new HealthStat(healthCheckInfoUpdate));
}
@Override
public synchronized void transmitHealthReports() {
synchronized (_healthReportProviderList) {
for (HealthReportProvider provider : _healthReportProviderList) {
try {
Map<String, String> report = provider.getRecentHealthReport();
Map<String, Map<String, String>> partitionReport =
provider.getRecentPartitionHealthReport();
ZNRecord record = new ZNRecord(provider.getReportName());
if (report != null) {
record.setSimpleFields(report);
}
if (partitionReport != null) {
record.setMapFields(partitionReport);
}
record.setSimpleField(StatsHolder.TIMESTAMP_NAME, "" + System.currentTimeMillis());
HelixDataAccessor accessor = _helixManager.getHelixDataAccessor();
Builder keyBuilder = accessor.keyBuilder();
accessor.setProperty(keyBuilder.healthReport(_instanceName, record.getId()),
new HealthStat(record));
provider.resetStats();
} catch (Exception e) {
_logger.error("fail to transmit health report", e);
}
}
}
}
}