kafka.controller

PartitionStateMachine

class PartitionStateMachine extends Logging

This class represents the state machine for partitions. It defines the states that a partition can be in, and transitions to move the partition to another legal state. The different states that a partition can be in are - 1. NonExistentPartition: This state indicates that the partition was either never created or was created and then deleted. Valid previous state, if one exists, is OfflinePartition 2. NewPartition : After creation, the partition is in the NewPartition state. In this state, the partition should have replicas assigned to it, but no leader/isr yet. Valid previous states are NonExistentPartition 3. OnlinePartition : Once a leader is elected for a partition, it is in the OnlinePartition state. Valid previous states are NewPartition/OfflinePartition 4. OfflinePartition : If, after successful leader election, the leader for partition dies, then the partition moves to the OfflinePartition state. Valid previous states are NewPartition/OnlinePartition

Inherited
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  1. Logging
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Visibility
  1. Public
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Instance constructors

  1. new PartitionStateMachine(controller: KafkaController)

Type Members

  1. class AddPartitionsListener extends IZkDataListener with Logging

  2. class DeleteTopicsListener extends IZkChildListener with Logging

    Delete topics includes the following operations - 1.

  3. class TopicChangeListener extends IZkChildListener with Logging

    This is the zookeeper listener that triggers all the state transitions for a partition

Value Members

  1. def !=(arg0: AnyRef): Boolean

    attributes: final
    definition classes: AnyRef
  2. def !=(arg0: Any): Boolean

    o != arg0 is the same as !(o == (arg0)).

    o != arg0 is the same as !(o == (arg0)).

    arg0

    the object to compare against this object for dis-equality.

    returns

    false if the receiver object is equivalent to the argument; true otherwise.

    attributes: final
    definition classes: Any
  3. def ##(): Int

    attributes: final
    definition classes: AnyRef → Any
  4. def $asInstanceOf[T0](): T0

    attributes: final
    definition classes: AnyRef
  5. def $isInstanceOf[T0](): Boolean

    attributes: final
    definition classes: AnyRef
  6. def ==(arg0: AnyRef): Boolean

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: AnyRef
  7. def ==(arg0: Any): Boolean

    o == arg0 is the same as o.equals(arg0).

    o == arg0 is the same as o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: Any
  8. def asInstanceOf[T0]: T0

    This method is used to cast the receiver object to be of type T0.

    This method is used to cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    the receiver object.

    attributes: final
    definition classes: Any
  9. val brokerRequestBatch: ControllerBrokerRequestBatch

  10. def clone(): AnyRef

    This method creates and returns a copy of the receiver object.

    This method creates and returns a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    attributes: protected
    definition classes: AnyRef
  11. def debug(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  12. def debug(e: ⇒ Throwable): Any

    definition classes: Logging
  13. def debug(msg: ⇒ String): Unit

    definition classes: Logging
  14. def deregisterPartitionChangeListener(topic: String): Unit

  15. def electLeaderForPartition(topic: String, partition: Int, leaderSelector: PartitionLeaderSelector): Unit

    Invoked on the OfflinePartition,OnlinePartition->OnlinePartition state change.

    Invoked on the OfflinePartition,OnlinePartition->OnlinePartition state change. It invokes the leader election API to elect a leader for the input offline partition

    topic

    The topic of the offline partition

    partition

    The offline partition

    leaderSelector

    Specific leader selector (e.g., offline/reassigned/etc.)

  16. def eq(arg0: AnyRef): Boolean

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

    Additionally, the eq method has three other properties. * It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false. * For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. * null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    arg0

    the object to compare against this object for reference equality.

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    attributes: final
    definition classes: AnyRef
  17. def equals(arg0: Any): Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]: * It is reflexive: for any instance x of type Any, x.equals(x) should return true. * It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true. * It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same scala.Int (o1.hashCode.equals(o2.hashCode)).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    definition classes: AnyRef → Any
  18. def error(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  19. def error(e: ⇒ Throwable): Any

    definition classes: Logging
  20. def error(msg: ⇒ String): Unit

    definition classes: Logging
  21. def fatal(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  22. def fatal(e: ⇒ Throwable): Any

    definition classes: Logging
  23. def fatal(msg: ⇒ String): Unit

    definition classes: Logging
  24. def finalize(): Unit

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

    attributes: protected
    definition classes: AnyRef
  25. def getClass(): java.lang.Class[_]

    Returns a representation that corresponds to the dynamic class of the receiver object.

    Returns a representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    attributes: final
    definition classes: AnyRef
  26. def handleStateChanges(partitions: Set[TopicAndPartition], targetState: PartitionState, leaderSelector: PartitionLeaderSelector = PartitionStateMachine.this.noOpPartitionLeaderSelector, callbacks: Callbacks = new kafka.controller.Callbacks.CallbackBuilder().build): Unit

    This API is invoked by the partition change zookeeper listener

    This API is invoked by the partition change zookeeper listener

    partitions

    The list of partitions that need to be transitioned to the target state

    targetState

    The state that the partitions should be moved to

  27. def hashCode(): Int

    Returns a hash code value for the object.

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    returns

    the hash code value for the object.

    definition classes: AnyRef → Any
  28. def info(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  29. def info(e: ⇒ Throwable): Any

    definition classes: Logging
  30. def info(msg: ⇒ String): Unit

    definition classes: Logging
  31. def isInstanceOf[T0]: Boolean

    This method is used to test whether the dynamic type of the receiver object is T0.

    This method is used to test whether the dynamic type of the receiver object is T0.

    Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    attributes: final
    definition classes: Any
  32. var logIdent: String

    attributes: protected
    definition classes: Logging
  33. lazy val logger: Logger

    definition classes: Logging
  34. val loggerName: String

    definition classes: Logging
  35. def ne(arg0: AnyRef): Boolean

    o.ne(arg0) is the same as !(o.eq(arg0)).

    o.ne(arg0) is the same as !(o.eq(arg0)).

    arg0

    the object to compare against this object for reference dis-equality.

    returns

    false if the argument is not a reference to the receiver object; true otherwise.

    attributes: final
    definition classes: AnyRef
  36. def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    attributes: final
    definition classes: AnyRef
  37. def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    attributes: final
    definition classes: AnyRef
  38. var partitionState: Map[TopicAndPartition, PartitionState]

  39. def partitionsInState(state: PartitionState): Set[TopicAndPartition]

  40. def registerListeners(): Unit

  41. def registerPartitionChangeListener(topic: String): Unit

  42. def shutdown(): Unit

    Invoked on controller shutdown.

    Invoked on controller shutdown.

  43. def startup(): Unit

    Invoked on successful controller election.

    Invoked on successful controller election. First registers a topic change listener since that triggers all state transitions for partitions. Initializes the state of partitions by reading from zookeeper. Then triggers the OnlinePartition state change for all new or offline partitions.

  44. def swallow(action: ⇒ Unit): Unit

    definition classes: Logging
  45. def swallowDebug(action: ⇒ Unit): Unit

    definition classes: Logging
  46. def swallowError(action: ⇒ Unit): Unit

    definition classes: Logging
  47. def swallowInfo(action: ⇒ Unit): Unit

    definition classes: Logging
  48. def swallowTrace(action: ⇒ Unit): Unit

    definition classes: Logging
  49. def swallowWarn(action: ⇒ Unit): Unit

    definition classes: Logging
  50. def synchronized[T0](arg0: T0): T0

    attributes: final
    definition classes: AnyRef
  51. def toString(): String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    definition classes: AnyRef → Any
  52. def trace(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  53. def trace(e: ⇒ Throwable): Any

    definition classes: Logging
  54. def trace(msg: ⇒ String): Unit

    definition classes: Logging
  55. def triggerOnlinePartitionStateChange(): Unit

    This API invokes the OnlinePartition state change on all partitions in either the NewPartition or OfflinePartition state.

    This API invokes the OnlinePartition state change on all partitions in either the NewPartition or OfflinePartition state. This is called on a successful controller election and on broker changes

  56. def wait(): Unit

    attributes: final
    definition classes: AnyRef
  57. def wait(arg0: Long, arg1: Int): Unit

    attributes: final
    definition classes: AnyRef
  58. def wait(arg0: Long): Unit

    attributes: final
    definition classes: AnyRef
  59. def warn(msg: ⇒ String, e: ⇒ Throwable): Unit

    definition classes: Logging
  60. def warn(e: ⇒ Throwable): Any

    definition classes: Logging
  61. def warn(msg: ⇒ String): Unit

    definition classes: Logging