/*
* 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.runners.core;
import java.io.Serializable;
import org.apache.beam.sdk.annotations.Experimental;
import org.apache.beam.sdk.annotations.Experimental.Kind;
/**
* A factory for providing {@link TimerInternals} for a particular key.
*
* <p>Because it will generally be embedded in a {@link org.apache.beam.sdk.transforms.DoFn DoFn},
* albeit at execution time, it is marked {@link Serializable}.
*/
@Experimental(Kind.STATE)
public interface TimerInternalsFactory<K> {
/** Returns {@link TimerInternals} for the provided key. */
TimerInternals timerInternalsForKey(K key);
}