1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.quicksearchbox.util; 18 19 /** 20 * Runs tasks that have a name tag. 21 */ 22 public interface NamedTaskExecutor { 23 24 /** 25 * Schedules a task for execution. Implementations should not throw 26 * {@link java.util.concurrent.RejectedExecutionException} if the task 27 * cannot be run. They should drop it silently instead. 28 */ execute(NamedTask task)29 void execute(NamedTask task); 30 31 /** 32 * Stops any unstarted tasks from running. Implementations of this method must be 33 * idempotent. 34 */ cancelPendingTasks()35 void cancelPendingTasks(); 36 37 /** 38 * Shuts down this executor, freeing any resources that it owns. The executor 39 * may not be used after calling this method. Implementations of this method must be 40 * idempotent. 41 */ close()42 void close(); 43 44 } 45