Package io.microraft.exception

Class LaggingCommitIndexException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

io.microraft.exception.RaftException

io.microraft.exception.LaggingCommitIndexException

All Implemented Interfaces:

Serializable

public class LaggingCommitIndexException
extends RaftException

Thrown when a Raft node's current commit index is smaller than the commit index specified in a RaftNode.query(Object, QueryPolicy, Optional, Optional) call. This exception means that the Raft node instance cannot execute the given query by preserving the monotonicity of the observed state. Please see the Section: 6.4 Processing read-only queries more efficiently of the Raft dissertation for more details.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
LaggingCommitIndexException(long commitIndex, long expectedCommitIndex, RaftEndpoint leader)	Creates an instance of this exception.

Method Summary

Modifier and Type	Method	Description
String	toString()

Methods inherited from class io.microraft.exception.RaftException

getLeader

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace

Methods inherited from class java.lang.Object

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

Constructor Details

LaggingCommitIndexException

public LaggingCommitIndexException(long commitIndex,
 long expectedCommitIndex,
 RaftEndpoint leader)

Creates an instance of this exception.

Parameters:

commitIndex - the current commit index of the RaftNode which throws this exception

expectedCommitIndex - the commit index expected by the caller

leader - the leader endpoint if it is known, null otherwise

Method Details

toString

public String toString()

Overrides:

toString in class RaftException