org.apache.nifi.cluster.protocol

Interface ProtocolHandler

public interface ProtocolHandler

A handler for processing protocol messages.

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(ProtocolMessage msg)
ProtocolMessage	handle(ProtocolMessage msg, Set<String> nodeIdentities) Handles the given protocol message or throws an exception if it cannot handle the message.

Method Detail

handle

ProtocolMessage handle(ProtocolMessage msg,
                       Set<String> nodeIdentities)
                throws ProtocolException

Handles the given protocol message or throws an exception if it cannot handle the message. If no response is needed by the protocol, then null should be returned.

Parameters:

msg - a message

nodeIdentities - the set of identities for this node

Returns:

a response or null, if no response is necessary

Throws:

ProtocolException - if the message could not be processed

canHandle

boolean canHandle(ProtocolMessage msg)

Parameters:

msg - a message

Returns:

true if the handler can process the given message; false otherwise