org.apache.storm.scheduler.blacklist

## Class BlacklistScheduler

- java.lang.Object
- - org.apache.storm.scheduler.blacklist.BlacklistScheduler

- All Implemented Interfaces:
    IScheduler

      public class BlacklistScheduler
      extends Object
      implements IScheduler

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected org.apache.storm.shade.com.google.common.collect.EvictingQueue<HashMap<String,Set<Integer>>>` | `badSupervisorsToleranceSlidingWindow`
    `protected Set<String>` | `blacklistHost`
    `protected IBlacklistStrategy` | `blacklistStrategy`
    `protected Map<String,Set<Integer>>` | `cachedSupervisors`
    `static int` | `DEFAULT_BLACKLIST_SCHEDULER_RESUME_TIME`
    `static int` | `DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_COUNT`
    `static int` | `DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_TIME`
    `protected int` | `nimbusMonitorFreqSecs`
    `protected IReporter` | `reporter`
    `protected int` | `resumeTime`
    `protected int` | `toleranceCount`
    `protected int` | `toleranceTime`
    `protected int` | `windowSize`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `BlacklistScheduler(IScheduler underlyingScheduler, StormMetricsRegistry metricsRegistry)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `cleanup()` called once when the system is shutting down, should be idempotent.
    `Map<String,Map<String,Double>>` | `config()` This function returns the scheduler’s configuration.
    `void` | `prepare(Map<String,Object> conf)`
    `void` | `schedule(Topologies topologies, Cluster cluster)` Set assignments for the topologies which needs scheduling.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### DEFAULT_BLACKLIST_SCHEDULER_RESUME_TIME

          public static final int DEFAULT_BLACKLIST_SCHEDULER_RESUME_TIME

      See Also:
        Constant Field Values

    - #### DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_COUNT

          public static final int DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_COUNT

      See Also:
        Constant Field Values

    - #### DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_TIME

          public static final int DEFAULT_BLACKLIST_SCHEDULER_TOLERANCE_TIME

      See Also:
        Constant Field Values

    - #### toleranceTime

          protected int toleranceTime

    - #### toleranceCount

          protected int toleranceCount

    - #### resumeTime

          protected int resumeTime

    - #### reporter

          protected IReporter reporter

    - #### blacklistStrategy

          protected IBlacklistStrategy blacklistStrategy

    - #### nimbusMonitorFreqSecs

          protected int nimbusMonitorFreqSecs

    - #### cachedSupervisors

          protected Map<String,Set<Integer>> cachedSupervisors

    - #### badSupervisorsToleranceSlidingWindow

          protected org.apache.storm.shade.com.google.common.collect.EvictingQueue<HashMap<String,Set<Integer>>> badSupervisorsToleranceSlidingWindow

    - #### windowSize

          protected int windowSize

    - #### blacklistHost

          protected Set<String> blacklistHost

  - ### Constructor Detail

    - #### BlacklistScheduler

          public BlacklistScheduler(IScheduler underlyingScheduler,
                                    StormMetricsRegistry metricsRegistry)

  - ### Method Detail

    - #### prepare

          public void prepare(Map<String,Object> conf)

      Specified by:
        `prepare` in interface `IScheduler`

    - #### cleanup

          public void cleanup()

      Description copied from interface: `IScheduler`

      called once when the system is shutting down, should be idempotent.

      Specified by:
        `cleanup` in interface `IScheduler`

    - #### schedule

          public void schedule(Topologies topologies,
                               Cluster cluster)

      Description copied from interface: `IScheduler`

      Set assignments for the topologies which needs scheduling. The new assignments is available through `cluster.getAssignments()`

      Specified by:
        `schedule` in interface `IScheduler`
      Parameters:
        `topologies` - all the topologies in the cluster, some of them need schedule. Topologies object here only contain static information about topologies. Information like assignments, slots are all in the `cluster` object.
        `cluster` - the cluster these topologies are running in. `cluster` contains everything user need to develop a new scheduling logic. e.g. supervisors information, available slots, current assignments for all the topologies etc. User can set the new assignment for topologies using cluster.setAssignmentById()`

    - #### config

          public Map<String,Map<String,Double>> config()

      Description copied from interface: `IScheduler`

      This function returns the scheduler’s configuration.

      Specified by:
        `config` in interface `IScheduler`
      Returns:
        The scheduler’s configuration.

Copyright © 2019 The Apache Software Foundation. All rights reserved.