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72
agent/src/main/java/io/pyroscope/javaagent/impl/SamplingProfilingScheduler.java
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| @@ -0,0 +1,72 @@ | ||
| package io.pyroscope.javaagent.impl; | ||
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| import static io.pyroscope.javaagent.DateUtils.truncate; | ||
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| import io.pyroscope.javaagent.Profiler; | ||
| import io.pyroscope.javaagent.Snapshot; | ||
| import io.pyroscope.javaagent.api.Exporter; | ||
| import io.pyroscope.javaagent.api.ProfilingScheduler; | ||
| import io.pyroscope.javaagent.config.Config; | ||
| import java.time.Duration; | ||
| import java.time.Instant; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * Schedule profiling in sampling mode. | ||
| * <p> | ||
| * WARNING: still experimental, may go away or behavior may change | ||
| */ | ||
| public class SamplingProfilingScheduler implements ProfilingScheduler { | ||
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| private final Config config; | ||
| private final Exporter exporter; | ||
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| private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(r -> { | ||
| Thread t = Executors.defaultThreadFactory().newThread(r); | ||
| t.setName("PyroscopeProfilingScheduler_Sampling"); | ||
| t.setDaemon(true); | ||
| return t; | ||
| }); | ||
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| public SamplingProfilingScheduler(Config config, Exporter exporter) { | ||
| this.config = config; | ||
| this.exporter = exporter; | ||
| } | ||
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| @Override | ||
| public void start(Profiler profiler) { | ||
| final long samplingDurationMillis = config.samplingDuration.toMillis(); | ||
| final Duration uploadInterval = config.uploadInterval; | ||
| final Runnable dumpProfile = () -> { | ||
| Instant profilingStartTime = Instant.now(); | ||
| profiler.start(); | ||
| try { | ||
| Thread.sleep(samplingDurationMillis); | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| } | ||
| profiler.stop(); | ||
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| Snapshot snapshot = profiler.dumpProfile(truncate(profilingStartTime, uploadInterval)); | ||
| exporter.export(snapshot); | ||
| }; | ||
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| Duration initialDelay = getInitialDelay(); | ||
| executor.scheduleAtFixedRate( | ||
| dumpProfile, | ||
| initialDelay.toMillis(), | ||
| config.uploadInterval.toMillis(), | ||
| TimeUnit.MILLISECONDS | ||
| ); | ||
| } | ||
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| private Duration getInitialDelay() { | ||
| Instant now = Instant.now(); | ||
| Instant prevUploadInterval = truncate(now, config.uploadInterval); | ||
| Instant nextUploadInterval = prevUploadInterval.plus(config.uploadInterval); | ||
| Duration initialDelay = Duration.between(now, nextUploadInterval); | ||
| return initialDelay; | ||
| } | ||
| } |