| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed 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 com.android.volley.mock; |
| |
| import com.android.volley.NetworkResponse; |
| import com.android.volley.Request; |
| import com.android.volley.Response; |
| |
| import java.util.concurrent.PriorityBlockingQueue; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| // TODO: the name of this class sucks |
| @SuppressWarnings("serial") |
| public class WaitableQueue extends PriorityBlockingQueue<Request<?>> { |
| private final Request<?> mStopRequest = new MagicStopRequest(); |
| private final Semaphore mStopEvent = new Semaphore(0); |
| |
| // TODO: this isn't really "until empty" it's "until next call to take() after empty" |
| public void waitUntilEmpty(long timeoutMillis) |
| throws TimeoutException, InterruptedException { |
| add(mStopRequest); |
| if (!mStopEvent.tryAcquire(timeoutMillis, TimeUnit.MILLISECONDS)) { |
| throw new TimeoutException(); |
| } |
| } |
| |
| @Override |
| public Request<?> take() throws InterruptedException { |
| Request<?> item = super.take(); |
| if (item == mStopRequest) { |
| mStopEvent.release(); |
| return take(); |
| } |
| return item; |
| } |
| |
| private static class MagicStopRequest extends Request<Object> { |
| public MagicStopRequest() { |
| super(Request.Method.GET, "", null); |
| } |
| |
| @Override |
| public Priority getPriority() { |
| return Priority.LOW; |
| } |
| |
| @Override |
| protected Response<Object> parseNetworkResponse(NetworkResponse response) { |
| return null; |
| } |
| |
| @Override |
| protected void deliverResponse(Object response) { |
| } |
| } |
| } |