io.netty.handler.traffic.TrafficCounter Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.handler.traffic;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static io.netty.util.internal.ObjectUtil.checkNotNullWithIAE;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
/**
* Counts the number of read and written bytes for rate-limiting traffic.
*
* It computes the statistics for both inbound and outbound traffic periodically at the given
* {@code checkInterval}, and calls the {@link AbstractTrafficShapingHandler#doAccounting(TrafficCounter)} method back.
* If the {@code checkInterval} is {@code 0}, no accounting will be done and statistics will only be computed at each
* receive or write operation.
*
*/
public class TrafficCounter {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(TrafficCounter.class);
/**
* @return the time in ms using nanoTime, so not real EPOCH time but elapsed time in ms.
*/
public static long milliSecondFromNano() {
return System.nanoTime() / 1000000;
}
/**
* Current written bytes
*/
private final AtomicLong currentWrittenBytes = new AtomicLong();
/**
* Current read bytes
*/
private final AtomicLong currentReadBytes = new AtomicLong();
/**
* Last writing time during current check interval
*/
private long writingTime;
/**
* Last reading delay during current check interval
*/
private long readingTime;
/**
* Long life written bytes
*/
private final AtomicLong cumulativeWrittenBytes = new AtomicLong();
/**
* Long life read bytes
*/
private final AtomicLong cumulativeReadBytes = new AtomicLong();
/**
* Last Time where cumulative bytes where reset to zero: this time is a real EPOC time (informative only)
*/
private long lastCumulativeTime;
/**
* Last writing bandwidth
*/
private long lastWriteThroughput;
/**
* Last reading bandwidth
*/
private long lastReadThroughput;
/**
* Last Time Check taken
*/
final AtomicLong lastTime = new AtomicLong();
/**
* Last written bytes number during last check interval
*/
private volatile long lastWrittenBytes;
/**
* Last read bytes number during last check interval
*/
private volatile long lastReadBytes;
/**
* Last future writing time during last check interval
*/
private volatile long lastWritingTime;
/**
* Last reading time during last check interval
*/
private volatile long lastReadingTime;
/**
* Real written bytes
*/
private final AtomicLong realWrittenBytes = new AtomicLong();
/**
* Real writing bandwidth
*/
private long realWriteThroughput;
/**
* Delay between two captures
*/
final AtomicLong checkInterval = new AtomicLong(
AbstractTrafficShapingHandler.DEFAULT_CHECK_INTERVAL);
// default 1 s
/**
* Name of this Monitor
*/
final String name;
/**
* The associated TrafficShapingHandler
*/
final AbstractTrafficShapingHandler trafficShapingHandler;
/**
* Executor that will run the monitor
*/
final ScheduledExecutorService executor;
/**
* Monitor created once in start()
*/
Runnable monitor;
/**
* used in stop() to cancel the timer
*/
volatile ScheduledFuture scheduledFuture;
/**
* Is Monitor active
*/
volatile boolean monitorActive;
/**
* Class to implement monitoring at fix delay
*
*/
private final class TrafficMonitoringTask implements Runnable {
@Override
public void run() {
if (!monitorActive) {
return;
}
resetAccounting(milliSecondFromNano());
if (trafficShapingHandler != null) {
trafficShapingHandler.doAccounting(TrafficCounter.this);
}
}
}
/**
* Start the monitoring process.
*/
public synchronized void start() {
if (monitorActive) {
return;
}
lastTime.set(milliSecondFromNano());
long localCheckInterval = checkInterval.get();
// if executor is null, it means it is piloted by a GlobalChannelTrafficCounter, so no executor
if (localCheckInterval > 0 && executor != null) {
monitorActive = true;
monitor = new TrafficMonitoringTask();
scheduledFuture =
executor.scheduleAtFixedRate(monitor, 0, localCheckInterval, TimeUnit.MILLISECONDS);
}
}
/**
* Stop the monitoring process.
*/
public synchronized void stop() {
if (!monitorActive) {
return;
}
monitorActive = false;
resetAccounting(milliSecondFromNano());
if (trafficShapingHandler != null) {
trafficShapingHandler.doAccounting(this);
}
if (scheduledFuture != null) {
scheduledFuture.cancel(true);
}
}
/**
* Reset the accounting on Read and Write.
*
* @param newLastTime the milliseconds unix timestamp that we should be considered up-to-date for.
*/
synchronized void resetAccounting(long newLastTime) {
long interval = newLastTime - lastTime.getAndSet(newLastTime);
if (interval == 0) {
// nothing to do
return;
}
if (logger.isDebugEnabled() && interval > checkInterval() << 1) {
logger.debug("Acct schedule not ok: " + interval + " > 2*" + checkInterval() + " from " + name);
}
lastReadBytes = currentReadBytes.getAndSet(0);
lastWrittenBytes = currentWrittenBytes.getAndSet(0);
lastReadThroughput = lastReadBytes * 1000 / interval;
// nb byte / checkInterval in ms * 1000 (1s)
lastWriteThroughput = lastWrittenBytes * 1000 / interval;
// nb byte / checkInterval in ms * 1000 (1s)
realWriteThroughput = realWrittenBytes.getAndSet(0) * 1000 / interval;
lastWritingTime = Math.max(lastWritingTime, writingTime);
lastReadingTime = Math.max(lastReadingTime, readingTime);
}
/**
* Constructor with the {@link AbstractTrafficShapingHandler} that hosts it, the {@link ScheduledExecutorService}
* to use, its name, the checkInterval between two computations in milliseconds.
*
* @param executor
* the underlying executor service for scheduling checks, might be null when used
* from {@link GlobalChannelTrafficCounter}.
* @param name
* the name given to this monitor.
* @param checkInterval
* the checkInterval in millisecond between two computations.
*/
public TrafficCounter(ScheduledExecutorService executor, String name, long checkInterval) {
this.name = checkNotNull(name, "name");
trafficShapingHandler = null;
this.executor = executor;
init(checkInterval);
}
/**
* Constructor with the {@link AbstractTrafficShapingHandler} that hosts it, the Timer to use, its
* name, the checkInterval between two computations in millisecond.
*
* @param trafficShapingHandler
* the associated AbstractTrafficShapingHandler.
* @param executor
* the underlying executor service for scheduling checks, might be null when used
* from {@link GlobalChannelTrafficCounter}.
* @param name
* the name given to this monitor.
* @param checkInterval
* the checkInterval in millisecond between two computations.
*/
public TrafficCounter(
AbstractTrafficShapingHandler trafficShapingHandler, ScheduledExecutorService executor,
String name, long checkInterval) {
this.name = checkNotNull(name, "name");
this.trafficShapingHandler = checkNotNullWithIAE(trafficShapingHandler, "trafficShapingHandler");
this.executor = executor;
init(checkInterval);
}
private void init(long checkInterval) {
// absolute time: informative only
lastCumulativeTime = System.currentTimeMillis();
writingTime = milliSecondFromNano();
readingTime = writingTime;
lastWritingTime = writingTime;
lastReadingTime = writingTime;
configure(checkInterval);
}
/**
* Change checkInterval between two computations in millisecond.
*
* @param newCheckInterval The new check interval (in milliseconds)
*/
public void configure(long newCheckInterval) {
long newInterval = newCheckInterval / 10 * 10;
if (checkInterval.getAndSet(newInterval) != newInterval) {
if (newInterval <= 0) {
stop();
// No more active monitoring
lastTime.set(milliSecondFromNano());
} else {
// Restart
stop();
start();
}
}
}
/**
* Computes counters for Read.
*
* @param recv
* the size in bytes to read
*/
void bytesRecvFlowControl(long recv) {
currentReadBytes.addAndGet(recv);
cumulativeReadBytes.addAndGet(recv);
}
/**
* Computes counters for Write.
*
* @param write
* the size in bytes to write
*/
void bytesWriteFlowControl(long write) {
currentWrittenBytes.addAndGet(write);
cumulativeWrittenBytes.addAndGet(write);
}
/**
* Computes counters for Real Write.
*
* @param write
* the size in bytes to write
*/
void bytesRealWriteFlowControl(long write) {
realWrittenBytes.addAndGet(write);
}
/**
* @return the current checkInterval between two computations of traffic counter
* in millisecond.
*/
public long checkInterval() {
return checkInterval.get();
}
/**
* @return the Read Throughput in bytes/s computes in the last check interval.
*/
public long lastReadThroughput() {
return lastReadThroughput;
}
/**
* @return the Write Throughput in bytes/s computes in the last check interval.
*/
public long lastWriteThroughput() {
return lastWriteThroughput;
}
/**
* @return the number of bytes read during the last check Interval.
*/
public long lastReadBytes() {
return lastReadBytes;
}
/**
* @return the number of bytes written during the last check Interval.
*/
public long lastWrittenBytes() {
return lastWrittenBytes;
}
/**
* @return the current number of bytes read since the last checkInterval.
*/
public long currentReadBytes() {
return currentReadBytes.get();
}
/**
* @return the current number of bytes written since the last check Interval.
*/
public long currentWrittenBytes() {
return currentWrittenBytes.get();
}
/**
* @return the Time in millisecond of the last check as of System.currentTimeMillis().
*/
public long lastTime() {
return lastTime.get();
}
/**
* @return the cumulativeWrittenBytes
*/
public long cumulativeWrittenBytes() {
return cumulativeWrittenBytes.get();
}
/**
* @return the cumulativeReadBytes
*/
public long cumulativeReadBytes() {
return cumulativeReadBytes.get();
}
/**
* @return the lastCumulativeTime in millisecond as of System.currentTimeMillis()
* when the cumulative counters were reset to 0.
*/
public long lastCumulativeTime() {
return lastCumulativeTime;
}
/**
* @return the realWrittenBytes
*/
public AtomicLong getRealWrittenBytes() {
return realWrittenBytes;
}
/**
* @return the realWriteThroughput
*/
public long getRealWriteThroughput() {
return realWriteThroughput;
}
/**
* Reset both read and written cumulative bytes counters and the associated absolute time
* from System.currentTimeMillis().
*/
public void resetCumulativeTime() {
lastCumulativeTime = System.currentTimeMillis();
cumulativeReadBytes.set(0);
cumulativeWrittenBytes.set(0);
}
/**
* @return the name of this TrafficCounter.
*/
public String name() {
return name;
}
/**
* Returns the time to wait (if any) for the given length message, using the given limitTraffic and the max wait
* time.
*
* @param size
* the recv size
* @param limitTraffic
* the traffic limit in bytes per second.
* @param maxTime
* the max time in ms to wait in case of excess of traffic.
* @return the current time to wait (in ms) if needed for Read operation.
*/
@Deprecated
public long readTimeToWait(final long size, final long limitTraffic, final long maxTime) {
return readTimeToWait(size, limitTraffic, maxTime, milliSecondFromNano());
}
/**
* Returns the time to wait (if any) for the given length message, using the given limitTraffic and the max wait
* time.
*
* @param size
* the recv size
* @param limitTraffic
* the traffic limit in bytes per second
* @param maxTime
* the max time in ms to wait in case of excess of traffic.
* @param now the current time
* @return the current time to wait (in ms) if needed for Read operation.
*/
public long readTimeToWait(final long size, final long limitTraffic, final long maxTime, final long now) {
bytesRecvFlowControl(size);
if (size == 0 || limitTraffic == 0) {
return 0;
}
final long lastTimeCheck = lastTime.get();
long sum = currentReadBytes.get();
long localReadingTime = readingTime;
long lastRB = lastReadBytes;
final long interval = now - lastTimeCheck;
long pastDelay = Math.max(lastReadingTime - lastTimeCheck, 0);
if (interval > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
// Enough interval time to compute shaping
long time = sum * 1000 / limitTraffic - interval + pastDelay;
if (time > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
if (logger.isDebugEnabled()) {
logger.debug("Time: " + time + ':' + sum + ':' + interval + ':' + pastDelay);
}
if (time > maxTime && now + time - localReadingTime > maxTime) {
time = maxTime;
}
readingTime = Math.max(localReadingTime, now + time);
return time;
}
readingTime = Math.max(localReadingTime, now);
return 0;
}
// take the last read interval check to get enough interval time
long lastsum = sum + lastRB;
long lastinterval = interval + checkInterval.get();
long time = lastsum * 1000 / limitTraffic - lastinterval + pastDelay;
if (time > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
if (logger.isDebugEnabled()) {
logger.debug("Time: " + time + ':' + lastsum + ':' + lastinterval + ':' + pastDelay);
}
if (time > maxTime && now + time - localReadingTime > maxTime) {
time = maxTime;
}
readingTime = Math.max(localReadingTime, now + time);
return time;
}
readingTime = Math.max(localReadingTime, now);
return 0;
}
/**
* Returns the time to wait (if any) for the given length message, using the given limitTraffic and
* the max wait time.
*
* @param size
* the write size
* @param limitTraffic
* the traffic limit in bytes per second.
* @param maxTime
* the max time in ms to wait in case of excess of traffic.
* @return the current time to wait (in ms) if needed for Write operation.
*/
@Deprecated
public long writeTimeToWait(final long size, final long limitTraffic, final long maxTime) {
return writeTimeToWait(size, limitTraffic, maxTime, milliSecondFromNano());
}
/**
* Returns the time to wait (if any) for the given length message, using the given limitTraffic and
* the max wait time.
*
* @param size
* the write size
* @param limitTraffic
* the traffic limit in bytes per second.
* @param maxTime
* the max time in ms to wait in case of excess of traffic.
* @param now the current time
* @return the current time to wait (in ms) if needed for Write operation.
*/
public long writeTimeToWait(final long size, final long limitTraffic, final long maxTime, final long now) {
bytesWriteFlowControl(size);
if (size == 0 || limitTraffic == 0) {
return 0;
}
final long lastTimeCheck = lastTime.get();
long sum = currentWrittenBytes.get();
long lastWB = lastWrittenBytes;
long localWritingTime = writingTime;
long pastDelay = Math.max(lastWritingTime - lastTimeCheck, 0);
final long interval = now - lastTimeCheck;
if (interval > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
// Enough interval time to compute shaping
long time = sum * 1000 / limitTraffic - interval + pastDelay;
if (time > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
if (logger.isDebugEnabled()) {
logger.debug("Time: " + time + ':' + sum + ':' + interval + ':' + pastDelay);
}
if (time > maxTime && now + time - localWritingTime > maxTime) {
time = maxTime;
}
writingTime = Math.max(localWritingTime, now + time);
return time;
}
writingTime = Math.max(localWritingTime, now);
return 0;
}
// take the last write interval check to get enough interval time
long lastsum = sum + lastWB;
long lastinterval = interval + checkInterval.get();
long time = lastsum * 1000 / limitTraffic - lastinterval + pastDelay;
if (time > AbstractTrafficShapingHandler.MINIMAL_WAIT) {
if (logger.isDebugEnabled()) {
logger.debug("Time: " + time + ':' + lastsum + ':' + lastinterval + ':' + pastDelay);
}
if (time > maxTime && now + time - localWritingTime > maxTime) {
time = maxTime;
}
writingTime = Math.max(localWritingTime, now + time);
return time;
}
writingTime = Math.max(localWritingTime, now);
return 0;
}
@Override
public String toString() {
return new StringBuilder(165).append("Monitor ").append(name)
.append(" Current Speed Read: ").append(lastReadThroughput >> 10).append(" KB/s, ")
.append("Asked Write: ").append(lastWriteThroughput >> 10).append(" KB/s, ")
.append("Real Write: ").append(realWriteThroughput >> 10).append(" KB/s, ")
.append("Current Read: ").append(currentReadBytes.get() >> 10).append(" KB, ")
.append("Current asked Write: ").append(currentWrittenBytes.get() >> 10).append(" KB, ")
.append("Current real Write: ").append(realWrittenBytes.get() >> 10).append(" KB").toString();
}
}