| /* |
| * 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); |
| } |