/*
* 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.beam.sdk.state;
import org.apache.beam.sdk.annotations.Experimental;
import org.apache.beam.sdk.annotations.Internal;
/**
* {@link TimeDomain} specifies whether an operation is based on timestamps of elements or current
* "real-world" time as reported while processing.
*/
@Experimental(Experimental.Kind.TIMERS)
public enum TimeDomain {
/**
* The {@link #EVENT_TIME} domain corresponds to the timestamps on the elements. Time advances on
* the system watermark advances.
*/
EVENT_TIME,
/**
* The {@link #PROCESSING_TIME} domain corresponds to the current to the current (system) time.
* This is advanced during execution of the pipeline.
*/
PROCESSING_TIME,
/**
* <b>For internal use only; no backwards compatibility guarantees.</b>
*
* <p>Same as the {@link #PROCESSING_TIME} domain, except it won't fire a timer set for time
* <i>t</i> until all timers from earlier stages set for a time earlier than <i>t</i> have fired.
*/
@Internal
SYNCHRONIZED_PROCESSING_TIME
}