Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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 io.netty.util; import java.util.Set; import java.util.concurrent.RejectedExecutionException; import java.util.concurrent.TimeUnit; /** * Schedules {@link TimerTask}s for one-time future execution in a background * thread. */ public interface Timer { /** * Schedules the specified {@link TimerTask} for one-time execution after * the specified delay. * * @return a handle which is associated with the specified task * * @throws IllegalStateException if this timer has been {@linkplain #stop() stopped} already * @throws RejectedExecutionException if the pending timeouts are too many and creating new timeout * can cause instability in the system. */ Timeout newTimeout(TimerTask task, long delay, TimeUnit unit); /** * Releases all resources acquired by this {@link Timer} and cancels all * tasks which were scheduled but not executed yet. * * @return the handles associated with the tasks which were canceled by * this method */ Set<Timeout> stop(); }