org.joyqueue.broker.kafka.coordinator.group.domain

枚举 GroupState

java.lang.Object

java.lang.Enum<GroupState>

org.joyqueue.broker.kafka.coordinator.group.domain.GroupState

所有已实现的接口:

Serializable, Comparable<GroupState>

public enum GroupState
extends Enum<GroupState>

Created by zhangkepeng on 17-2-13.

枚举常量概要

枚举常量

枚举常量和说明
AWAITINGSYNC Group is awaiting state assignment from the leader action: respond to heartbeats with REBALANCE_IN_PROGRESS respond to offset commits with REBALANCE_IN_PROGRESS park sync group requests from followers until transition to Stable allow offset fetch requests transition: sync group with state assignment received from leader => Stable join group from new member or existing member with updated metadata => PreparingRebalance leave group from existing member => PreparingRebalance member failure detected => PreparingRebalance
DEAD Group has no more members action: respond to join group with UNKNOWN_MEMBER_ID respond to sync group with UNKNOWN_MEMBER_ID respond to heartbeat with UNKNOWN_MEMBER_ID respond to leave group with UNKNOWN_MEMBER_ID respond to offset commit with UNKNOWN_MEMBER_ID allow offset fetch requests transition: Dead is a final state before group metadata is cleaned up, so there are no transitions
EMPTY Group has no more members, but lingers until all offsets have expired.
PREPARINGREBALANCE Group is preparing to rebalance action: respond to heartbeats with REBALANCE_IN_PROGRESS respond to sync group with REBALANCE_IN_PROGRESS remove member on leave group request park join group requests from new or existing members until all expected members have joined allow offset commits from previous generation allow offset fetch requests transition: some members have joined by the timeout => AwaitingSync all members have left the group => Dead
STABLE Group is stable action: respond to member heartbeats normally respond to sync group from any member with current assignment respond to join group from followers with matching metadata with current group metadata allow offset commits from member of current generation allow offset fetch requests transition: member failure detected via heartbeat => PreparingRebalance leave group from existing member => PreparingRebalance leader join-group received => PreparingRebalance follower join-group with new metadata => PreparingRebalance

方法概要

限定符和类型	方法和说明
byte	getState()
static GroupState	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static GroupState[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

EMPTY

public static final GroupState EMPTY

Group has no more members, but lingers until all offsets have expired. This state also represents groups which use Kafka only for offset commits and have no members. action: respond normally to join group from new members respond to sync group with UNKNOWN_MEMBER_ID respond to heartbeat with UNKNOWN_MEMBER_ID respond to leave group with UNKNOWN_MEMBER_ID respond to offset commit with UNKNOWN_MEMBER_ID allow offset fetch requests transition: last offsets removed in periodic expiration task => Dead join group from a new member => PreparingRebalance group is removed by partition emigration => Dead group is removed by expiration => Dead

PREPARINGREBALANCE

public static final GroupState PREPARINGREBALANCE

Group is preparing to rebalance action: respond to heartbeats with REBALANCE_IN_PROGRESS respond to sync group with REBALANCE_IN_PROGRESS remove member on leave group request park join group requests from new or existing members until all expected members have joined allow offset commits from previous generation allow offset fetch requests transition: some members have joined by the timeout => AwaitingSync all members have left the group => Dead

AWAITINGSYNC

public static final GroupState AWAITINGSYNC

Group is awaiting state assignment from the leader action: respond to heartbeats with REBALANCE_IN_PROGRESS respond to offset commits with REBALANCE_IN_PROGRESS park sync group requests from followers until transition to Stable allow offset fetch requests transition: sync group with state assignment received from leader => Stable join group from new member or existing member with updated metadata => PreparingRebalance leave group from existing member => PreparingRebalance member failure detected => PreparingRebalance

STABLE

public static final GroupState STABLE

Group is stable action: respond to member heartbeats normally respond to sync group from any member with current assignment respond to join group from followers with matching metadata with current group metadata allow offset commits from member of current generation allow offset fetch requests transition: member failure detected via heartbeat => PreparingRebalance leave group from existing member => PreparingRebalance leader join-group received => PreparingRebalance follower join-group with new metadata => PreparingRebalance

DEAD

public static final GroupState DEAD

Group has no more members action: respond to join group with UNKNOWN_MEMBER_ID respond to sync group with UNKNOWN_MEMBER_ID respond to heartbeat with UNKNOWN_MEMBER_ID respond to leave group with UNKNOWN_MEMBER_ID respond to offset commit with UNKNOWN_MEMBER_ID allow offset fetch requests transition: Dead is a final state before group metadata is cleaned up, so there are no transitions

方法详细资料

values

public static GroupState[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (GroupState c : GroupState.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static GroupState valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

getState

public byte getState()