org.apache.cassandra.net

Class ForwardingInfo

java.lang.Object

org.apache.cassandra.net.ForwardingInfo

All Implemented Interfaces:

java.io.Serializable

public final class ForwardingInfo
extends java.lang.Object
implements java.io.Serializable

A container used to store a node -> message_id map for inter-DC write forwarding. We pick one node in each external DC to forward the message to its local peers. TODO: in the next protocol version only serialize peers, message id will become redundant once 3.0 is out of the picture

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ForwardingInfo(java.util.List<InetAddressAndPort> targets, long[] messageIds)

Method Summary

Modifier and Type	Method and Description
void	forEach(java.util.function.BiConsumer<java.lang.Long,InetAddressAndPort> biConsumer) Apply the provided consumer to all (host, message_id) pairs.
boolean	useSameMessageID()

Methods inherited from class java.lang.Object

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

Constructor Detail

ForwardingInfo

public ForwardingInfo(java.util.List<InetAddressAndPort> targets,
                      long[] messageIds)

Method Detail

useSameMessageID

public boolean useSameMessageID()

Returns:

true if all host are to use the same message id, false otherwise. Starting with 4.0 and above, we should be reusing the same id, always, but it won't always be true until 3.0/3.11 are phased out.

forEach

public void forEach(java.util.function.BiConsumer<java.lang.Long,InetAddressAndPort> biConsumer)

Apply the provided consumer to all (host, message_id) pairs.