kafka Scheduler 源码
kafka Scheduler 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/utils/Scheduler.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.common.utils;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
/**
* An interface for scheduling tasks for the future.
*
* Implementations of this class should be thread-safe.
*/
public interface Scheduler {
Scheduler SYSTEM = new SystemScheduler();
/**
* Get the timekeeper associated with this scheduler.
*/
Time time();
/**
* Schedule a callable to be executed in the future on a
* ScheduledExecutorService. Note that the Callable may not be queued on
* the executor until the designated time arrives.
*
* @param executor The executor to use.
* @param callable The callable to execute.
* @param delayMs The delay to use, in milliseconds.
* @param <T> The return type of the callable.
* @return A future which will complete when the callable is finished.
*/
<T> Future<T> schedule(final ScheduledExecutorService executor,
final Callable<T> callable, long delayMs);
}
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