org.apache.cassandra.locator

Class ReplicaPlan.ForWrite

java.lang.Object

org.apache.cassandra.locator.ReplicaPlan.AbstractReplicaPlan<EndpointsForToken,ReplicaPlan.ForWrite>

org.apache.cassandra.locator.ReplicaPlan.ForWrite

All Implemented Interfaces:

ReplicaPlan<EndpointsForToken,ReplicaPlan.ForWrite>

Direct Known Subclasses:

ReplicaPlan.ForPaxosWrite

Enclosing interface:

ReplicaPlan<E extends Endpoints<E>,P extends ReplicaPlan<E,P>>

public static class ReplicaPlan.ForWrite
extends ReplicaPlan.AbstractReplicaPlan<EndpointsForToken,ReplicaPlan.ForWrite>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.locator.ReplicaPlan

ReplicaPlan.AbstractForRead<E extends Endpoints<E>,P extends ReplicaPlan.ForRead<E,P>>, ReplicaPlan.AbstractReplicaPlan<E extends Endpoints<E>,P extends ReplicaPlan<E,P>>, ReplicaPlan.ForPaxosWrite, ReplicaPlan.ForRangeRead, ReplicaPlan.ForRead<E extends Endpoints<E>,P extends ReplicaPlan.ForRead<E,P>>, ReplicaPlan.ForTokenRead, ReplicaPlan.ForWrite, ReplicaPlan.Shared<E extends Endpoints<E>,P extends ReplicaPlan<E,P>>, ReplicaPlan.SharedForRangeRead, ReplicaPlan.SharedForTokenRead

Field Summary

Fields inherited from class org.apache.cassandra.locator.ReplicaPlan.AbstractReplicaPlan

consistencyLevel, keyspace, replicationStrategy

Constructor Summary

Constructors

Constructor and Description
ForWrite(Keyspace keyspace, AbstractReplicationStrategy replicationStrategy, ConsistencyLevel consistencyLevel, EndpointsForToken pending, EndpointsForToken liveAndDown, EndpointsForToken live, EndpointsForToken contact)

Method Summary

Modifier and Type	Method and Description
boolean	isAlive(Replica replica) Test liveness, consistent with the upfront analysis done for this operation (i.e.
EndpointsForToken	live() The live replicas present in liveAndDown, usually derived from FailureDetector.isReplicaAlive
EndpointsForToken	liveAndDown() Replicas that can participate in the write - this always includes all nodes (pending and natural) in all DCs, except for paxos LOCAL_QUORUM (which is local DC only)
EndpointsForToken	liveUncontacted() Calculate which live endpoints we could have contacted, but chose not to
Replica	lookup(InetAddressAndPort endpoint)
EndpointsForToken	pending() Replicas that a region of the ring is moving to; not yet ready to serve reads, but should receive writes
java.lang.String	toString()
ReplicaPlan.ForWrite	withContacts(EndpointsForToken newContact)
int	writeQuorum()

Methods inherited from class org.apache.cassandra.locator.ReplicaPlan.AbstractReplicaPlan

consistencyLevel, contacts, keyspace, replicationStrategy

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.locator.ReplicaPlan

shared, shared

Constructor Detail

ForWrite

public ForWrite(Keyspace keyspace,
                AbstractReplicationStrategy replicationStrategy,
                ConsistencyLevel consistencyLevel,
                EndpointsForToken pending,
                EndpointsForToken liveAndDown,
                EndpointsForToken live,
                EndpointsForToken contact)

Method Detail

writeQuorum

public int writeQuorum()

pending

public EndpointsForToken pending()

Replicas that a region of the ring is moving to; not yet ready to serve reads, but should receive writes

liveAndDown

public EndpointsForToken liveAndDown()

Replicas that can participate in the write - this always includes all nodes (pending and natural) in all DCs, except for paxos LOCAL_QUORUM (which is local DC only)

live

public EndpointsForToken live()

The live replicas present in liveAndDown, usually derived from FailureDetector.isReplicaAlive

liveUncontacted

public EndpointsForToken liveUncontacted()

Calculate which live endpoints we could have contacted, but chose not to

isAlive

public boolean isAlive(Replica replica)

Test liveness, consistent with the upfront analysis done for this operation (i.e. test membership of live())

lookup

public Replica lookup(InetAddressAndPort endpoint)

withContacts

public ReplicaPlan.ForWrite withContacts(EndpointsForToken newContact)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object