/*
* Copyright (C) 2013 Facebook, Inc.
*
* Licensed 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 com.facebook.swift.service;
import com.facebook.nifty.core.NiftyRequestContext;
import com.facebook.nifty.core.RequestContext;
import io.airlift.units.Duration;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.TimeUnit;
import static io.airlift.units.Duration.nanosSince;
import static java.lang.System.nanoTime;
public class ThriftServiceStatsHandler extends ThriftEventHandler
{
private final ConcurrentHashMap<String, ThriftMethodStats> stats = new ConcurrentHashMap<>();
private static class PerCallMethodStats
{
public final RequestContext requestContext;
public boolean success = true;
public long startTime = nanoTime();
public long preReadTime;
public long postReadTime;
public long preWriteTime;
public PerCallMethodStats(RequestContext requestContext)
{
this.requestContext = requestContext;
}
}
private static Duration nanosBetween(long start, long end)
{
return new Duration(end - start, TimeUnit.NANOSECONDS);
}
public ConcurrentMap<String, ThriftMethodStats> getStats()
{
return stats;
}
@Override
public Object getContext(String methodName, RequestContext requestContext)
{
stats.putIfAbsent(methodName, new ThriftMethodStats());
return new PerCallMethodStats(requestContext);
}
@Override
public void preRead(Object context, String methodName)
{
((PerCallMethodStats)context).preReadTime = nanoTime();
}
@Override
public void postRead(Object context, String methodName, Object[] args)
{
long now = nanoTime();
PerCallMethodStats ctx = (PerCallMethodStats)context;
ctx.postReadTime = now;
stats.get(methodName).addReadTime(nanosBetween(ctx.preReadTime, now));
stats.get(methodName).addReadByteCount(getBytesRead(ctx));
}
@Override
public void preWrite(Object context, String methodName, Object result)
{
long now = nanoTime();
PerCallMethodStats ctx = (PerCallMethodStats)context;
ctx.preWriteTime = now;
stats.get(methodName).addInvokeTime(nanosBetween(ctx.postReadTime, now));
}
@Override
public void preWriteException(Object context, String methodName, Throwable t)
{
preWrite(context, methodName, null);
((PerCallMethodStats)context).success = false;
}
@Override
public void postWrite(Object context, String methodName, Object result)
{
PerCallMethodStats ctx = (PerCallMethodStats) context;
stats.get(methodName).addWriteTime(nanosSince(ctx.preWriteTime));
stats.get(methodName).addWriteByteCount(getBytesWritten(ctx));
}
@Override
public void postWriteException(Object context, String methodName, Throwable t)
{
postWrite(context, methodName, null);
}
@Override
public void done(Object context, String methodName)
{
PerCallMethodStats ctx = (PerCallMethodStats)context;
Duration duration = nanosSince(ctx.startTime);
if (ctx.success) {
stats.get(methodName).addSuccessTime(duration);
} else {
stats.get(methodName).addErrorTime(duration);
}
}
private int getBytesRead(PerCallMethodStats ctx)
{
if (!(ctx.requestContext instanceof NiftyRequestContext)) {
return 0;
}
NiftyRequestContext requestContext = (NiftyRequestContext) ctx.requestContext;
return requestContext.getNiftyTransport().getReadByteCount();
}
private int getBytesWritten(PerCallMethodStats ctx)
{
if (!(ctx.requestContext instanceof NiftyRequestContext)) {
// Standard TTransport interface doesn't give us a way to determine how many bytes
// were read
return 0;
}
NiftyRequestContext requestContext = (NiftyRequestContext) ctx.requestContext;
return requestContext.getNiftyTransport().getWrittenByteCount();
}
}