Package org.apache.druid.messages.client

Class MessageRelayClientImpl<MessageType>

java.lang.Object

org.apache.druid.messages.client.MessageRelayClientImpl<MessageType>

All Implemented Interfaces:

MessageRelayClient<MessageType>

public class MessageRelayClientImpl<MessageType>
extends Object
implements MessageRelayClient<MessageType>

Production implementation of MessageRelayClient.

Constructor Summary

Constructors

Constructor	Description
MessageRelayClientImpl(ServiceClient serviceClient, com.fasterxml.jackson.databind.ObjectMapper smileMapper, Class<MessageType> inMessageClass)

Method Summary

Modifier and Type	Method	Description
com.google.common.util.concurrent.ListenableFuture<MessageBatch<MessageType>>	getMessages(String clientHost, long epoch, long startWatermark)	Get the next batch of messages from an outbox.

Methods inherited from class java.lang.Object

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

Constructor Details

MessageRelayClientImpl

public MessageRelayClientImpl(ServiceClient serviceClient,
 com.fasterxml.jackson.databind.ObjectMapper smileMapper,
 Class<MessageType> inMessageClass)

Method Details

getMessages

public com.google.common.util.concurrent.ListenableFuture<MessageBatch<MessageType>> getMessages(String clientHost,
 long epoch,
 long startWatermark)

Description copied from interface: MessageRelayClient

Get the next batch of messages from an outbox.

Specified by:

getMessages in interface MessageRelayClient<MessageType>

Parameters:

clientHost - which outbox to retrieve messages from. Each clientHost has its own outbox.

epoch - outbox epoch, or MessageRelay.INIT if this is the first call from the collector.

startWatermark - outbox message watermark to retrieve from.

Returns:

future that resolves to the next batch of messages

See Also:

• http endpoint this method calls