72 lines
2.1 KiB
Java
72 lines
2.1 KiB
Java
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/**
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* Copyright 2013 Netflix, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package rx.concurrency;
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import java.util.LinkedList;
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import java.util.Queue;
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import java.util.concurrent.TimeUnit;
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import rx.Subscription;
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import rx.util.functions.Func0;
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/**
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* Schedules work on the current thread but does not execute immediately. Work is put in a queue and executed after the current unit of work is completed.
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*/
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public class CurrentThreadScheduler extends AbstractScheduler {
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private static final CurrentThreadScheduler INSTANCE = new CurrentThreadScheduler();
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public static CurrentThreadScheduler getInstance() {
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return INSTANCE;
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}
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private static final ThreadLocal<Queue<DiscardableAction>> QUEUE = new ThreadLocal<>();
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private CurrentThreadScheduler() {
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}
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@Override
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public Subscription schedule(Func0<Subscription> action) {
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DiscardableAction discardableAction = new DiscardableAction(action);
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enqueue(discardableAction);
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return discardableAction;
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}
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@Override
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public Subscription schedule(Func0<Subscription> action, long dueTime, TimeUnit unit) {
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return schedule(new SleepingAction(action, this, dueTime, unit));
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}
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private void enqueue(DiscardableAction action) {
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Queue<DiscardableAction> queue = QUEUE.get();
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boolean exec = queue == null;
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if (exec) {
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queue = new LinkedList<>();
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QUEUE.set(queue);
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}
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queue.add(action);
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if (exec) {
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while (!queue.isEmpty()) {
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queue.poll().call();
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}
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QUEUE.set(null);
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}
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}
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}
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