Enum Constant Detail

• ADD_LEARNER

  public static final MembershipChangeMode ADD_LEARNER

  Denotes that a new Raft endpoint will be added to the Raft group as a RaftRole.LEARNER. The quorum size of the Raft group will not change after the new Raft endpoint is added, since the number of voting members stays the same. Once the new Raft endpoint catches up with the leader, it can be promoted to the voting member role via ADD_OR_PROMOTE_TO_FOLLOWER.

• ADD_OR_PROMOTE_TO_FOLLOWER

  public static final MembershipChangeMode ADD_OR_PROMOTE_TO_FOLLOWER

  Denotes that either a new Raft endpoint will be added to the Raft group as a RaftRole.FOLLOWER, or an existing (i.e., RaftRole.LEARNER Raft endpoint in the Raft group will be promoted to the RaftRole.FOLLOWER role. The quorum size of the Raft group is re-calculated based on the new number of voting members.

• REMOVE_MEMBER

  public static final MembershipChangeMode REMOVE_MEMBER

  Denotes that a Raft endpoint will be removed from the Raft group.

Method Detail

• values

  public static MembershipChangeMode[] values()

  Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

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

  Returns:

  an array containing the constants of this enum type, in the order they are declared

• valueOf

  public static MembershipChangeMode valueOf​(String name)

  Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

  Parameters:

  name - the name of the enum constant to be returned.

  Returns:

  the enum constant with the specified name

  Throws:

  IllegalArgumentException - if this enum type has no constant with the specified name

  NullPointerException - if the argument is null