org.apache.beam.sdk.io.jms

Class JmsCheckpointMark

java.lang.Object

org.apache.beam.sdk.io.jms.JmsCheckpointMark

All Implemented Interfaces:

UnboundedSource.CheckpointMark

@DefaultCoder(value=AvroCoder.class)
public class JmsCheckpointMark
extends java.lang.Object
implements UnboundedSource.CheckpointMark

Checkpoint for an unbounded JmsIO.Read. Consists of JMS destination name, and the latest message ID consumed so far.

Constructor Summary

Constructors

Constructor and Description
JmsCheckpointMark()

Method Summary

Modifier and Type	Method and Description
protected void	addMessage(javax.jms.Message message)
void	finalizeCheckpoint() Acknowledge all outstanding message.
protected java.util.List<javax.jms.Message>	getMessages()
protected Instant	getOldestPendingTimestamp()

Methods inherited from class java.lang.Object

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

Constructor Detail

JmsCheckpointMark

public JmsCheckpointMark()

Method Detail

getMessages

protected java.util.List<javax.jms.Message> getMessages()

addMessage

protected void addMessage(javax.jms.Message message)
                   throws java.lang.Exception

Throws:

java.lang.Exception

getOldestPendingTimestamp

protected Instant getOldestPendingTimestamp()

finalizeCheckpoint

public void finalizeCheckpoint()

Acknowledge all outstanding message. Since we believe that messages will be delivered in timestamp order, and acknowledged messages will not be retried, the newest message in this batch is a good bound for future messages.

Specified by:

finalizeCheckpoint in interface UnboundedSource.CheckpointMark