kafka WindowRangeQuery 源码
kafka WindowRangeQuery 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/query/WindowRangeQuery.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.streams.kstream.Windowed;
import org.apache.kafka.streams.state.KeyValueIterator;
import java.time.Instant;
import java.util.Optional;
public class WindowRangeQuery<K, V> implements Query<KeyValueIterator<Windowed<K>, V>> {
private final Optional<K> key;
private final Optional<Instant> timeFrom;
private final Optional<Instant> timeTo;
private WindowRangeQuery(final Optional<K> key,
final Optional<Instant> timeFrom,
final Optional<Instant> timeTo) {
this.key = key;
this.timeFrom = timeFrom;
this.timeTo = timeTo;
}
public static <K, V> WindowRangeQuery<K, V> withKey(final K key) {
return new WindowRangeQuery<>(Optional.of(key), Optional.empty(), Optional.empty());
}
public static <K, V> WindowRangeQuery<K, V> withWindowStartRange(final Instant timeFrom,
final Instant timeTo) {
return new WindowRangeQuery<>(Optional.empty(), Optional.of(timeFrom), Optional.of(timeTo));
}
public Optional<K> getKey() {
return key;
}
public Optional<Instant> getTimeFrom() {
return timeFrom;
}
public Optional<Instant> getTimeTo() {
return timeTo;
}
@Override
public String toString() {
return "WindowRangeQuery{" +
"key=" + key +
", timeFrom=" + timeFrom +
", timeTo=" + timeTo +
'}';
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦