flink-libraries/flink-state-processing-api/src/main/java/org/apache/flink/state/api/runtime/VoidTriggerable.java

/*
 * 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.state.api.runtime;

import org.apache.flink.annotation.Internal;
import org.apache.flink.streaming.api.operators.InternalTimer;
import org.apache.flink.streaming.api.operators.Triggerable;

/**
 * A {@link Triggerable} that does nothing.
 *
 * @param <K> Type of the keys to which timers are scoped.
 * @param <N> Type of the namespace to which timers are scoped.
 */
@Internal
public final class VoidTriggerable<K, N> implements Triggerable<K, N> {
    public static <K, N> VoidTriggerable<K, N> instance() {
        return new VoidTriggerable<>();
    }

    private VoidTriggerable() {}

    @Override
    public void onEventTime(InternalTimer<K, N> timer) {}

    @Override
    public void onProcessingTime(InternalTimer<K, N> timer) {}
}