Module org.jgroups.raft

Package org.jgroups.raft.util

Class Utils

java.lang.Object

org.jgroups.raft.util.Utils

public class Utils
extends Object

Since:

1.0.6

Author:

Bela Ban

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Utils.Majority

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static Utils.Majority	computeMajority(org.jgroups.View old, org.jgroups.View new_view, int majority, org.jgroups.Address leader)
static Utils.Majority	computeMajority(org.jgroups.View oldView, org.jgroups.View newView, RAFT raft)
static void	deleteLog(RAFT r)	Deprecated, for removal: This API element is subject to removal in a future version. Use RaftTestUtils.deleteRaftLog(RAFT) instead.
static String	extractRaftId(org.jgroups.Address address)
static boolean	isMajorityLost(Collection<String> oldMembers, Collection<String> newMembers, int majority)
static boolean	isMajorityReached(Collection<String> oldMembers, Collection<String> newMembers, int majority)
static boolean	isRaftMember(String raftId, Collection<String> raftMembers)	Verifies if the given raft ID belongs to the list of members.
static boolean	majorityLost(org.jgroups.View old, org.jgroups.View new_view, int majority)
static boolean	majorityReached(org.jgroups.View old, org.jgroups.View new_view, int majority)
static boolean	viewCoordinatorChanged(org.jgroups.View prev, org.jgroups.View curr)	Verify if the coordinator change between two views.

Methods inherited from class java.lang.Object

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

Constructor Details

Utils

public Utils()

Method Details

majorityReached

public static boolean majorityReached(org.jgroups.View old,
 org.jgroups.View new_view,
 int majority)

majorityLost

public static boolean majorityLost(org.jgroups.View old,
 org.jgroups.View new_view,
 int majority)

computeMajority

public static Utils.Majority computeMajority(org.jgroups.View old,
 org.jgroups.View new_view,
 int majority,
 org.jgroups.Address leader)

isMajorityReached

public static boolean isMajorityReached(Collection<String> oldMembers,
 Collection<String> newMembers,
 int majority)

isMajorityLost

public static boolean isMajorityLost(Collection<String> oldMembers,
 Collection<String> newMembers,
 int majority)

computeMajority

public static Utils.Majority computeMajority(org.jgroups.View oldView,
 org.jgroups.View newView,
 RAFT raft)

viewCoordinatorChanged

public static boolean viewCoordinatorChanged(org.jgroups.View prev,
 org.jgroups.View curr)

Verify if the coordinator change between two views.

Parameters:

prev - The old View, it can be null.

curr - The recent View.

Returns:

true if the coordinator changed, false, otherwise.

deleteLog

@Deprecated(since="1.0.13",
            forRemoval=true)
public static void deleteLog(RAFT r)
                      throws Exception

Deprecated, for removal: This API element is subject to removal in a future version.

Use RaftTestUtils.deleteRaftLog(RAFT) instead.

Deletes the log data for the given RAFT instance.

Warning: This should be used in tests only.

Parameters:

r - RAFT instance to delete the log contents.

Throws:

Exception - If an exception happens while deleting the log.

isRaftMember

public static boolean isRaftMember(String raftId,
 Collection<String> raftMembers)

Verifies if the given raft ID belongs to the list of members.

Parameters:

raftId - The member to verify.

raftMembers - The list of members.

Returns:

true if the member is a Raft member, false, otherwise.

extractRaftId

public static String extractRaftId(org.jgroups.Address address)