com.amazonaws.services.kinesis.multilang.messages.CheckpointMessage Maven / Gradle / Ivy
/*
* Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Amazon Software License (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/asl/
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.services.kinesis.multilang.messages;
import lombok.Getter;
import lombok.Setter;
/**
* A checkpoint message is sent by the client's subprocess to indicate to the kcl processor that it should attempt to
* checkpoint. The processor sends back a checkpoint message as an acknowledgement that it attempted to checkpoint along
* with an error message which corresponds to the names of exceptions that a checkpointer can throw.
*/
@Getter
@Setter
public class CheckpointMessage extends Message {
/**
* The name used for the action field in {@link Message}.
*/
public static final String ACTION = "checkpoint";
/**
* The checkpoint this message is about.
*/
private String sequenceNumber;
private Long subSequenceNumber;
/**
* The name of an exception that occurred while attempting to checkpoint.
*/
private String error;
/**
* Default constructor.
*/
public CheckpointMessage() {
}
/**
* Convenience constructor.
*
* @param sequenceNumber
* The sequence number that this message is about.
* @param subSequenceNumber
* the sub sequence number for the checkpoint. This can be null.
* @param throwable
* When responding to a client's process, the record processor will add the name of the exception that
* occurred while attempting to checkpoint if one did occur.
*/
public CheckpointMessage(String sequenceNumber, Long subSequenceNumber, Throwable throwable) {
this.setSequenceNumber(sequenceNumber);
this.subSequenceNumber = subSequenceNumber;
if (throwable != null) {
this.setError(throwable.getClass().getSimpleName());
}
}
}