com.fr.third.jgroups.blocks

类 PartitionedHashMap.ConsistentHashFunction<K>

java.lang.Object

com.fr.third.jgroups.blocks.PartitionedHashMap.ConsistentHashFunction<K>

所有已实现的接口:

PartitionedHashMap.HashFunction<K>, MembershipListener

封闭类:

PartitionedHashMap<K,V>

public static class PartitionedHashMap.ConsistentHashFunction<K>
extends java.lang.Object
implements MembershipListener, PartitionedHashMap.HashFunction<K>

构造器概要

构造器

构造器和说明
PartitionedHashMap.ConsistentHashFunction()

方法概要

方法

限定符和类型	方法和说明
void	block() Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages.
Address	hash(K key, java.util.List<Address> members) Defines a hash function to pick the right node from the list of cluster nodes.
void	suspect(Address suspected_mbr) Called whenever a member is suspected of having crashed, but has not yet been excluded.
void	unblock() Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again.
void	viewAccepted(View new_view) Called when a change in membership has occurred.

从类继承的方法 java.lang.Object

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

构造器详细资料

PartitionedHashMap.ConsistentHashFunction

public PartitionedHashMap.ConsistentHashFunction()

方法详细资料

hash

public Address hash(K key,
           java.util.List<Address> members)

从接口复制的说明: PartitionedHashMap.HashFunction

Defines a hash function to pick the right node from the list of cluster nodes. Ideally, this function uses consistent hashing, so that the same key maps to the same node despite cluster view changes. If a view change causes all keys to hash to different nodes, then PartitionedHashMap will redirect requests to different nodes and this causes unnecessary overhead.

指定者:

hash 在接口中 PartitionedHashMap.HashFunction<K>

参数:

key - The object to be hashed

members - The membership. This value can be ignored for example if the hash function keeps track of the membership itself, e.g. by registering as a membership listener (PartitionedHashMap.addMembershipListener(MembershipListener) )

返回:

viewAccepted

public void viewAccepted(View new_view)

从接口复制的说明: MembershipListener

Called when a change in membership has occurred. No long running actions, sending of messages or anything that could block should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread.

Note that on reception of the first view (a new member just joined), the channel will not yet be in the connected state. This only happens when Channel.connect(String) returns.

指定者:

viewAccepted 在接口中 MembershipListener

suspect

public void suspect(Address suspected_mbr)

从接口复制的说明: MembershipListener

Called whenever a member is suspected of having crashed, but has not yet been excluded.

指定者:

suspect 在接口中 MembershipListener

block

public void block()

从接口复制的说明: MembershipListener

Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages. Any messages sent after returning from this callback might get blocked by the FLUSH protocol. When the FLUSH protocol is done, and messages can be sent again, the FLUSH protocol will simply unblock all pending messages. If a callback for unblocking is desired, implement MembershipListener.unblock(). Note that block() is the equivalent of reception of a BlockEvent in the pull mode.

指定者:

block 在接口中 MembershipListener

unblock

public void unblock()

从接口复制的说明: MembershipListener

Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again. This callback only needs to be implemented if we require a notification of that.

Note that during new view installation we provide guarantee that unblock invocation strictly follows view installation at some node A belonging to that view . However, some other message M may squeeze in between view and unblock callbacks.

For more details see https://jira.jboss.org/jira/browse/JGRP-986

指定者:

unblock 在接口中 MembershipListener