Method Detail

• getFollowers

  public List<Follower> getFollowers()

  Get this leader's known followers.

  The returned list is a copy; changes have no effect on this instance.

  Returns:

  this leader's followers

• getLeaseTimeout

  public Timestamp getLeaseTimeout()

  Get this leader's "lease timeout".

  This is the earliest possible time at which some other, new leader could be elected in a new term. Consequently, it is the earliest possible time at which any entry that this leader is unaware of could be appended to the Raft log.

  Normally, if followers are responding to AppendRequests properly, this should be a value in the (near) future. This allows the leader to make the assumption, up until that point in time, that its log is fully up-to-date.

  Until it hears from a majority of followers, a leader will not have a lease timeout established yet. In that case this method returns null.

  This method may also return null if a previous lease timeout has gotten very stale (e.g., isolated leader).

  Returns:

  this leader's lease timeout, or null if none is established yet

• stepDown

  public void stepDown()

  Force this leader to step down.

  Throws:

  IllegalStateException - if this role is no longer active or election timer is not running

• toString

  public String toString()

  Specified by:

  toString in class Role