/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.instrument;
import java.util.Arrays;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import javax.management.DynamicMBean;
import javax.management.MBeanServer;
import org.smallmind.instrument.context.NamedMetricFactory;
import org.smallmind.instrument.context.TracingOptions;
import org.smallmind.instrument.event.MetricEvent;
import org.smallmind.instrument.event.MetricEventListener;
import org.smallmind.instrument.jmx.ChronometerMonitor;
import org.smallmind.instrument.jmx.DefaultJMXNamingPolicy;
import org.smallmind.instrument.jmx.HistogramMonitor;
import org.smallmind.instrument.jmx.JMXNamingPolicy;
import org.smallmind.instrument.jmx.GaugeMonitor;
import org.smallmind.instrument.jmx.SpeedometerMonitor;
import org.smallmind.instrument.jmx.TallyMonitor;
import org.smallmind.nutsnbolts.lang.UnknownSwitchCaseException;
public class MetricRegistry {
private final ConcurrentHashMap<MetricKey, Metric<?>> metricMap = new ConcurrentHashMap<MetricKey, Metric<?>>();
private MBeanServer server;
private JMXNamingPolicy jmxNamingPolicy = new DefaultJMXNamingPolicy();
private TracingOptions tracingOptions;
private ConcurrentLinkedQueue<MetricEventListener> metricEventListenerQueue = new ConcurrentLinkedQueue<>();
public MBeanServer getServer () {
return server;
}
public void setServer (MBeanServer server) {
this.server = server;
}
public void setJmxNamingPolicy (JMXNamingPolicy jmxNamingPolicy) {
this.jmxNamingPolicy = jmxNamingPolicy;
}
public TracingOptions getTracingOptions () {
return tracingOptions;
}
public void setTracingOptions (TracingOptions tracingOptions) {
this.tracingOptions = tracingOptions;
}
public void setMetricEventListeners (MetricEventListener[] metricEventListeners) {
metricEventListenerQueue.addAll(Arrays.asList(metricEventListeners));
}
public void register () {
InstrumentationManager.register(this);
}
public void addMetricEventListener (MetricEventListener metricEventListener) {
metricEventListenerQueue.add(metricEventListener);
}
public void removeMetricEventListener (MetricEventListener metricEventListener) {
metricEventListenerQueue.remove(metricEventListener);
}
public void fireMetricEvent (MetricEvent metricEvent) {
if (!metricEventListenerQueue.isEmpty()) {
for (MetricEventListener metricEventListener : metricEventListenerQueue) {
metricEventListener.metricTriggered(metricEvent);
}
}
}
public <M extends Metric<M>> M instrument (Metrics.MetricBuilder<M> builder, String domain, MetricProperty... properties) {
M metric;
MetricKey metricKey = new MetricKey(builder.getType(), domain, properties);
if ((metric = builder.getMetricClass().cast(metricMap.get(metricKey))) == null) {
synchronized (metricMap) {
if ((metric = builder.getMetricClass().cast(metricMap.get(metricKey))) == null) {
metricMap.put(metricKey, metric = (tracingOptions != null) ? builder.getMetricClass().cast(NamedMetricFactory.createNamedMetric(builder.getType(), builder.construct(), domain, properties).getProxy()) : builder.construct());
if (server != null) {
DynamicMBean mBean;
switch (builder.getType()) {
case TALLY:
mBean = new TallyMonitor((Tally)metric);
break;
case METER:
mBean = new GaugeMonitor((Gauge)metric);
break;
case HISTOGRAM:
mBean = new HistogramMonitor((Histogram)metric);
break;
case SPEEDOMETER:
mBean = new SpeedometerMonitor((Speedometer)metric);
break;
case CHRONOMETER:
mBean = new ChronometerMonitor((Chronometer)metric);
break;
default:
throw new UnknownSwitchCaseException(builder.getType().name());
}
try {
server.registerMBean(mBean, jmxNamingPolicy.createObjectName(builder.getType(), domain, properties));
}
catch (Exception exception) {
throw new InstrumentationException(exception);
}
}
}
}
}
return metric;
}
}