kafka WindowKeyQuery 源码
kafka WindowKeyQuery 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/query/WindowKeyQuery.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.kafka.streams.query;
import org.apache.kafka.common.annotation.InterfaceStability.Evolving;
import org.apache.kafka.streams.state.WindowStoreIterator;
import java.time.Instant;
import java.util.Optional;
@Evolving
public class WindowKeyQuery<K, V> implements Query<WindowStoreIterator<V>> {
private final K key;
private final Optional<Instant> timeFrom;
private final Optional<Instant> timeTo;
private WindowKeyQuery(final K key,
final Optional<Instant> timeTo,
final Optional<Instant> timeFrom) {
this.key = key;
this.timeFrom = timeFrom;
this.timeTo = timeTo;
}
public static <K, V> WindowKeyQuery<K, V> withKeyAndWindowStartRange(final K key,
final Instant timeFrom,
final Instant timeTo) {
return new WindowKeyQuery<>(key, Optional.of(timeFrom), Optional.of(timeTo));
}
public K getKey() {
return key;
}
public Optional<Instant> getTimeFrom() {
return timeFrom;
}
public Optional<Instant> getTimeTo() {
return timeTo;
}
@Override
public String toString() {
return "WindowKeyQuery{" +
"key=" + key +
", timeFrom=" + timeFrom +
", timeTo=" + timeTo +
'}';
}
}
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