1/* 2 * Copyright (C) 2015 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 */ 16package android.annotation; 17 18import java.lang.annotation.Retention; 19import java.lang.annotation.Target; 20 21import static java.lang.annotation.ElementType.CONSTRUCTOR; 22import static java.lang.annotation.ElementType.METHOD; 23import static java.lang.annotation.ElementType.PARAMETER; 24import static java.lang.annotation.ElementType.TYPE; 25import static java.lang.annotation.RetentionPolicy.SOURCE; 26 27/** 28 * Denotes that the annotated method should only be called on a worker thread. 29 * If the annotated element is a class, then all methods in the class should be 30 * called on a worker thread. 31 * <p> 32 * Example: 33 * 34 * <pre> 35 * <code> 36 * @WorkerThread 37 * protected abstract FilterResults performFiltering(CharSequence constraint); 38 * </code> 39 * </pre> 40 * 41 * @memberDoc This method may take several seconds to complete, so it should 42 * only be called from a worker thread. 43 * @hide 44 */ 45@Retention(SOURCE) 46@Target({METHOD,CONSTRUCTOR,TYPE,PARAMETER}) 47public @interface WorkerThread { 48} 49