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This artifact is for use with the JVM Runtime Metrics features. It is a lightweight Java agent that uses a Prometheus Java client to report metrics.

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package com.heroku.agent.metrics.detector;

import java.lang.instrument.Instrumentation;

public interface ServerDetector {

  boolean detect();

  /**
   * Notify detector that the JVM is about to start. A detector can, if needed, block and wait for
   * some condition but should ultimately return at some point or throw an exception. This
   * notification is executed in a very early stage (premain of the JVM agent) before the main class
   * of the Server is executed.
   *
   * @param instrumentation the Instrumentation implementation
   */
  void jvmAgentStartup(Instrumentation instrumentation);
}