72 lines
2.2 KiB
Java
72 lines
2.2 KiB
Java
/*
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* Copyright (C) 2015 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.producers.monitoring;
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import static java.util.concurrent.TimeUnit.NANOSECONDS;
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import com.google.common.base.Stopwatch;
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import com.google.common.base.Ticker;
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/**
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* A monitor that measures the timing of the execution of a producer method, and logs those timings
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* with the given recorder.
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*/
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@SuppressWarnings("GoodTime") // should use java.time.Duration
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final class TimingProducerMonitor extends ProducerMonitor {
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private final ProducerTimingRecorder recorder;
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private final Stopwatch stopwatch;
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private final Stopwatch componentStopwatch;
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private long startNanos = -1;
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TimingProducerMonitor(
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ProducerTimingRecorder recorder, Ticker ticker, Stopwatch componentStopwatch) {
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this.recorder = recorder;
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this.stopwatch = Stopwatch.createUnstarted(ticker);
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this.componentStopwatch = componentStopwatch;
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}
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@Override
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public void methodStarting() {
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startNanos = componentStopwatch.elapsed(NANOSECONDS);
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stopwatch.start();
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}
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@Override
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public void methodFinished() {
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// TODO(beder): Is a system ticker the appropriate way to track CPU time? Should we use
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// ThreadCpuTicker instead?
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long durationNanos = stopwatch.elapsed(NANOSECONDS);
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recorder.recordMethod(startNanos, durationNanos);
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}
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@Override
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public void succeeded(Object o) {
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long latencyNanos = stopwatch.elapsed(NANOSECONDS);
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recorder.recordSuccess(latencyNanos);
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}
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@Override
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public void failed(Throwable t) {
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if (stopwatch.isRunning()) {
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long latencyNanos = stopwatch.elapsed(NANOSECONDS);
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recorder.recordFailure(t, latencyNanos);
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} else {
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recorder.recordSkip(t);
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}
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}
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}
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