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Clay Reimann
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Jan 26, 2017
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64 changes: 64 additions & 0 deletions
64
fili-core/src/main/java/com/yahoo/bard/webservice/logging/TimedPhase.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| /* | ||
| * Copyright 2017 Yahoo Inc. All rights reserved. | ||
| */ | ||
| package com.yahoo.bard.webservice.logging; | ||
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| import com.yahoo.bard.webservice.application.MetricRegistryFactory; | ||
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| import com.codahale.metrics.MetricRegistry; | ||
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * Represents a phase that is timed. | ||
| * TimedPhase is used to associate a Timer located in the registry with the exact duration of such a phase for a | ||
| * specific request. | ||
| */ | ||
| public class TimedPhase { | ||
| private static final MetricRegistry REGISTRY = MetricRegistryFactory.getRegistry(); | ||
| private static final Logger LOG = LoggerFactory.getLogger(RequestLog.class); | ||
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| protected final String name; | ||
| protected long start; | ||
| protected long duration; | ||
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| /** | ||
| * Constructor. | ||
| * | ||
| * @param name Name of the phase | ||
| */ | ||
| protected TimedPhase(String name) { | ||
| this.name = name; | ||
| } | ||
|
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| /** | ||
| * Start the phase. | ||
| */ | ||
| protected void start() { | ||
| if (start != 0) { | ||
| LOG.warn("Tried to start timer that is already running: {}", name); | ||
| return; | ||
| } | ||
| start = System.nanoTime(); | ||
| } | ||
|
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| /** | ||
| * Stop the phase. | ||
| */ | ||
| protected void stop() { | ||
| if (start == 0) { | ||
| LOG.warn("Tried to stop timer that has not been started: {}", name); | ||
| return; | ||
| } | ||
| duration += System.nanoTime() - start; | ||
| REGISTRY.timer(name).update(duration, TimeUnit.NANOSECONDS); | ||
| start = 0; | ||
| } | ||
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| protected boolean isRunning() { | ||
| return start != 0; | ||
| } | ||
| } |
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