Github user codymarcel commented on a diff in the pull request: https://github.com/apache/phoenix/pull/41#discussion_r26243169 --- Diff: phoenix-pherf/src/main/java/org/apache/phoenix/pherf/jmx/MonitorManager.java --- @@ -0,0 +1,174 @@ +/* + * 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.phoenix.pherf.jmx; + +import org.apache.phoenix.pherf.PherfConstants; +import org.apache.phoenix.pherf.exception.FileLoaderRuntimeException; +import org.apache.phoenix.pherf.jmx.monitors.Monitor; +import org.apache.phoenix.pherf.result.file.ResultFileDetails; +import org.apache.phoenix.pherf.result.impl.CSVResultHandler; +import org.apache.phoenix.pherf.result.Result; +import org.apache.phoenix.pherf.result.ResultHandler; +import org.apache.phoenix.util.DateUtil; + +import javax.management.*; +import java.io.IOException; +import java.lang.management.ManagementFactory; +import java.util.*; + +/** + * This class starts JMX stats for the configured monitors. Monitors should be configured in MonitorDetails Enum. + * Each stat implements {@link org.apache.phoenix.pherf.jmx.monitors.Monitor}. + * + * For the duration of any Pherf run, when the configured {@link org.apache.phoenix.pherf.PherfConstants#MONITOR_FREQUENCY} + * is reached a snapshot of each monitor is taken and dumped out to a log file. + */ +public class MonitorManager implements Runnable { + // List of MonitorDetails for all the running monitors. + private static final List<MonitorDetails> MONITOR_DETAILS_LIST; + private final ResultHandler resultHandler; + private final long monitorFrequency; + private volatile long rowCount; + private volatile boolean shouldStop = false; + private volatile boolean isRunning = false; + + static { + // TODO Move this out to config. Possible use Guice and use IOC to inject it in. + MONITOR_DETAILS_LIST = Arrays.asList(MonitorDetails.values()); + } + + public MonitorManager() throws Exception { + this(PherfConstants.MONITOR_FREQUENCY); + } + + /** + * + * @param monitorFrequency Frequency at which monitor stats are written to a log file. + * @throws Exception + */ + public MonitorManager(long monitorFrequency) throws Exception { + this.monitorFrequency = monitorFrequency; + MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); + + // Register all the monitors to JMX + for (MonitorDetails monitorDetails : MONITOR_DETAILS_LIST) { + StandardMBean bean = new StandardMBean(monitorDetails.getMonitor(), Monitor.class); + ObjectName monitorThreadStatName = new ObjectName(monitorDetails.toString()); + try { + mbs.registerMBean(bean, monitorThreadStatName); + } catch (InstanceAlreadyExistsException e) { + mbs.unregisterMBean(monitorThreadStatName); + mbs.registerMBean(bean, monitorThreadStatName); + } + } + this.rowCount = 0; + this.resultHandler = new CSVResultHandler(PherfConstants.MONITOR_FILE_NAME, ResultFileDetails.CSV); + } + + @Override + public void run() { + try { + while (!shouldStop()) { + isRunning = true; + List rowValues = new ArrayList<String>(); + synchronized (resultHandler) { + for (MonitorDetails monitorDetails : MONITOR_DETAILS_LIST) { + rowValues.clear(); + try { + StandardMBean bean = new StandardMBean(monitorDetails.getMonitor(), Monitor.class); + + Calendar calendar = new GregorianCalendar(); + rowValues.add(monitorDetails); + + rowValues.add(((Monitor) bean.getImplementation()).getStat()); + rowValues.add(DateUtil.DEFAULT_MS_DATE_FORMATTER.format(calendar.getTime())); + Result + result = new Result(ResultFileDetails.CSV, ResultFileDetails.CSV_MONITOR.getHeader().toString(), rowValues); + resultHandler.write(result); + } catch (Exception e) { + throw new FileLoaderRuntimeException("Could not log monitor result.", e); + } + rowCount++; + } + try { + Thread.sleep(getMonitorFrequency()); + } catch (InterruptedException e) { + e.printStackTrace(); --- End diff -- Added
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