Package org.apache.druid.java.util.metrics

Interface Monitor

All Known Implementing Classes:
AbstractMonitor, CgroupCpuMonitor, CgroupCpuSetMonitor, CgroupDiskMonitor, CgroupMemoryMonitor, CgroupV2CpuMonitor, CgroupV2CpuSetMonitor, CgroupV2DiskMonitor, CgroupV2MemoryMonitor, CpuAcctDeltaMonitor, ExecutorServiceMonitor, FeedDefiningMonitor, HttpPostEmitterMonitor, JvmCpuMonitor, JvmMonitor, JvmThreadsMonitor, NoopOshiSysMonitor, NoopSysMonitor, OshiSysMonitor, ParametrizedUriEmitterMonitor, SysMonitor
public interface Monitor

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    monitor(ServiceEmitter emitter)
    Emit metrics using the given emitter.
    void
    start()
     
    void
    stop()
     

  • Method Details

    • start

      void start()

    • stop

      void stop()

    • monitor

      boolean monitor(ServiceEmitter emitter)
      Emit metrics using the given emitter. May be called from two separate threads: the scheduling thread and a lifecycle thread that is shutting down monitors. Therefore, this method must be thread-safe.
      Returns:
      true if this monitor needs to continue monitoring. False otherwise.