//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server;
import java.io.IOException;
import java.util.Arrays;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.annotation.ManagedOperation;
import org.eclipse.jetty.util.component.AbstractLifeCycle;
import org.eclipse.jetty.util.component.Container;
import org.eclipse.jetty.util.component.ContainerLifeCycle;
import org.eclipse.jetty.util.component.Dumpable;
import org.eclipse.jetty.util.statistic.CounterStatistic;
import org.eclipse.jetty.util.statistic.SampleStatistic;
/* ------------------------------------------------------------ */
/** A Connector.Listener that gathers Connector and Connections Statistics.
* Adding an instance of this class as with {@link AbstractConnector#addBean(Object)}
* will register the listener with all connections accepted by that connector.
*/
@ManagedObject("Connector Statistics")
public class ConnectorStatistics extends AbstractLifeCycle implements Dumpable, Connection.Listener
{
private final static Sample ZERO=new Sample();
private final AtomicLong _startMillis = new AtomicLong(-1L);
private final CounterStatistic _connectionStats = new CounterStatistic();
private final SampleStatistic _messagesIn = new SampleStatistic();
private final SampleStatistic _messagesOut = new SampleStatistic();
private final SampleStatistic _connectionDurationStats = new SampleStatistic();
private final ConcurrentMap<Connection, Sample> _samples = new ConcurrentHashMap<>();
private final AtomicInteger _closedIn = new AtomicInteger();
private final AtomicInteger _closedOut = new AtomicInteger();
private AtomicLong _nanoStamp=new AtomicLong();
private volatile int _messagesInPerSecond;
private volatile int _messagesOutPerSecond;
@Override
public void onOpened(Connection connection)
{
if (isStarted())
{
_connectionStats.increment();
_samples.put(connection,ZERO);
}
}
@Override
public void onClosed(Connection connection)
{
if (isStarted())
{
int msgsIn=connection.getMessagesIn();
int msgsOut=connection.getMessagesOut();
_messagesIn.set(msgsIn);
_messagesOut.set(msgsOut);
_connectionStats.decrement();
_connectionDurationStats.set(System.currentTimeMillis()-connection.getCreatedTimeStamp());
Sample sample=_samples.remove(connection);
if (sample!=null)
{
_closedIn.addAndGet(msgsIn-sample._messagesIn);
_closedOut.addAndGet(msgsOut-sample._messagesOut);
}
}
}
@ManagedAttribute("Total number of bytes received by this connector")
public int getBytesIn()
{
// TODO
return -1;
}
@ManagedAttribute("Total number of bytes sent by this connector")
public int getBytesOut()
{
// TODO
return -1;
}
@ManagedAttribute("Total number of connections seen by this connector")
public int getConnections()
{
return (int)_connectionStats.getTotal();
}
@ManagedAttribute("Connection duration maximum in ms")
public long getConnectionDurationMax()
{
return _connectionDurationStats.getMax();
}
@ManagedAttribute("Connection duration mean in ms")
public double getConnectionDurationMean()
{
return _connectionDurationStats.getMean();
}
@ManagedAttribute("Connection duration standard deviation")
public double getConnectionDurationStdDev()
{
return _connectionDurationStats.getStdDev();
}
@ManagedAttribute("Messages In for all connections")
public int getMessagesIn()
{
return (int)_messagesIn.getTotal();
}
@ManagedAttribute("Messages In per connection maximum")
public int getMessagesInPerConnectionMax()
{
return (int)_messagesIn.getMax();
}
@ManagedAttribute("Messages In per connection mean")
public double getMessagesInPerConnectionMean()
{
return _messagesIn.getMean();
}
@ManagedAttribute("Messages In per connection standard deviation")
public double getMessagesInPerConnectionStdDev()
{
return _messagesIn.getStdDev();
}
@ManagedAttribute("Connections open")
public int getConnectionsOpen()
{
return (int)_connectionStats.getCurrent();
}
@ManagedAttribute("Connections open maximum")
public int getConnectionsOpenMax()
{
return (int)_connectionStats.getMax();
}
@ManagedAttribute("Messages Out for all connections")
public int getMessagesOut()
{
return (int)_messagesIn.getTotal();
}
@ManagedAttribute("Messages In per connection maximum")
public int getMessagesOutPerConnectionMax()
{
return (int)_messagesIn.getMax();
}
@ManagedAttribute("Messages In per connection mean")
public double getMessagesOutPerConnectionMean()
{
return _messagesIn.getMean();
}
@ManagedAttribute("Messages In per connection standard deviation")
public double getMessagesOutPerConnectionStdDev()
{
return _messagesIn.getStdDev();
}
@ManagedAttribute("Connection statistics started ms since epoch")
public long getStartedMillis()
{
long start = _startMillis.get();
return start < 0 ? 0 : System.currentTimeMillis() - start;
}
@ManagedAttribute("Messages in per second calculated over period since last called")
public int getMessagesInPerSecond()
{
update();
return _messagesInPerSecond;
}
@ManagedAttribute("Messages out per second calculated over period since last called")
public int getMessagesOutPerSecond()
{
update();
return _messagesOutPerSecond;
}
@Override
public void doStart()
{
reset();
}
@Override
public void doStop()
{
_samples.clear();
}
@ManagedOperation("Reset the statistics")
public void reset()
{
_startMillis.set(System.currentTimeMillis());
_messagesIn.reset();
_messagesOut.reset();
_connectionStats.reset();
_connectionDurationStats.reset();
_samples.clear();
}
@Override
@ManagedOperation("dump thread state")
public String dump()
{
return ContainerLifeCycle.dump(this);
}
@Override
public void dump(Appendable out, String indent) throws IOException
{
ContainerLifeCycle.dumpObject(out,this);
ContainerLifeCycle.dump(out,indent,Arrays.asList(new String[]{"connections="+_connectionStats,"duration="+_connectionDurationStats,"in="+_messagesIn,"out="+_messagesOut}));
}
public static void addToAllConnectors(Server server)
{
for (Connector connector : server.getConnectors())
{
if (connector instanceof Container)
((Container)connector).addBean(new ConnectorStatistics());
}
}
private static final long SECOND_NANOS=TimeUnit.SECONDS.toNanos(1);
private synchronized void update()
{
long now=System.nanoTime();
long then=_nanoStamp.get();
long duration=now-then;
if (duration>SECOND_NANOS/2)
{
if (_nanoStamp.compareAndSet(then,now))
{
long msgsIn=_closedIn.getAndSet(0);
long msgsOut=_closedOut.getAndSet(0);
for (Map.Entry<Connection, Sample> entry : _samples.entrySet())
{
Connection connection=entry.getKey();
Sample sample = entry.getValue();
Sample next = new Sample(connection);
if (_samples.replace(connection,sample,next))
{
msgsIn+=next._messagesIn-sample._messagesIn;
msgsOut+=next._messagesOut-sample._messagesOut;
}
}
_messagesInPerSecond=(int)(msgsIn*SECOND_NANOS/duration);
_messagesOutPerSecond=(int)(msgsOut*SECOND_NANOS/duration);
}
}
}
private static class Sample
{
Sample()
{
_messagesIn=0;
_messagesOut=0;
}
Sample(Connection connection)
{
_messagesIn=connection.getMessagesIn();
_messagesOut=connection.getMessagesOut();
}
final int _messagesIn;
final int _messagesOut;
}
}