org.apache.flink.table.runtime.window.aligned.AlignedWindowTrigger Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.table.runtime.window.aligned;
import org.apache.flink.table.api.window.TimeWindow;
import java.io.Serializable;
/**
* A {@link AlignedWindowTrigger} determines the when is the next trigger time and
* which next window should be triggered.
*/
public interface AlignedWindowTrigger extends Serializable {
/**
* Returns what's the next trigger time after this clock time.
* @param clockTime a clock time is the watermark or processing time
* which tracks the current time of the operator.
*/
long nextTriggerTime(long clockTime);
/**
* Returns what's the next trigger window after this clock time.
* @param clockTime a clock time is the watermark or processing time
* which tracks the current time of the operator.
*/
TimeWindow nextTriggerWindow(long clockTime);
}