org.apache.flink.streaming.connectors.pulsar.table.PulsarSinkSemantic Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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 org.apache.flink.streaming.connectors.pulsar.table;
import org.apache.flink.annotation.Internal;
/**
* Pulsar sink semantic Enum.
* */
@Internal
public enum PulsarSinkSemantic {
/**
* Semantic.EXACTLY_ONCE the Flink producer will write all messages in a Pulsar transaction that will be
* committed to Pulsar on a checkpoint.
*/
EXACTLY_ONCE,
/**
* Semantic.AT_LEAST_ONCE the Flink producer will wait for all outstanding messages in the Pulsar buffers
* to be acknowledged by the Pulsar producer on a checkpoint.
*/
AT_LEAST_ONCE,
/**
* Semantic.NONE means that nothing will be guaranteed. Messages can be lost and/or duplicated in case
* of failure.
*/
NONE
}