mirror of https://github.com/NekoX-Dev/NekoX.git
153 lines
5.9 KiB
Java
153 lines
5.9 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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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 org.telegram.android.volley;
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import android.annotation.TargetApi;
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import android.net.TrafficStats;
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import android.os.Build;
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import android.os.Process;
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import android.os.SystemClock;
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import java.util.concurrent.BlockingQueue;
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/**
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* Provides a thread for performing network dispatch from a queue of requests.
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*
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* Requests added to the specified queue are processed from the network via a
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* specified {@link org.telegram.android.volley.Network} interface. Responses are committed to cache, if
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* eligible, using a specified {@link org.telegram.android.volley.Cache} interface. Valid responses and
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* errors are posted back to the caller via a {@link org.telegram.android.volley.ResponseDelivery}.
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*/
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public class NetworkDispatcher extends Thread {
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/** The queue of requests to service. */
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private final BlockingQueue<Request<?>> mQueue;
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/** The network interface for processing requests. */
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private final Network mNetwork;
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/** The cache to write to. */
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private final Cache mCache;
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/** For posting responses and errors. */
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private final ResponseDelivery mDelivery;
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/** Used for telling us to die. */
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private volatile boolean mQuit = false;
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/**
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* Creates a new network dispatcher thread. You must call {@link #start()}
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* in order to begin processing.
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*
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* @param queue Queue of incoming requests for triage
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* @param network Network interface to use for performing requests
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* @param cache Cache interface to use for writing responses to cache
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* @param delivery Delivery interface to use for posting responses
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*/
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public NetworkDispatcher(BlockingQueue<Request<?>> queue,
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Network network, Cache cache,
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ResponseDelivery delivery) {
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mQueue = queue;
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mNetwork = network;
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mCache = cache;
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mDelivery = delivery;
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}
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/**
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* Forces this dispatcher to quit immediately. If any requests are still in
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* the queue, they are not guaranteed to be processed.
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*/
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public void quit() {
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mQuit = true;
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interrupt();
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}
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@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
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private void addTrafficStatsTag(Request<?> request) {
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// Tag the request (if API >= 14)
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
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TrafficStats.setThreadStatsTag(request.getTrafficStatsTag());
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}
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}
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@Override
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public void run() {
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Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
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while (true) {
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long startTimeMs = SystemClock.elapsedRealtime();
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Request<?> request;
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try {
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// Take a request from the queue.
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request = mQueue.take();
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} catch (InterruptedException e) {
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// We may have been interrupted because it was time to quit.
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if (mQuit) {
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return;
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}
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continue;
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}
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try {
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request.addMarker("network-queue-take");
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// If the request was cancelled already, do not perform the
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// network request.
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if (request.isCanceled()) {
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request.finish("network-discard-cancelled");
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continue;
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}
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addTrafficStatsTag(request);
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// Perform the network request.
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NetworkResponse networkResponse = mNetwork.performRequest(request);
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request.addMarker("network-http-complete");
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// If the server returned 304 AND we delivered a response already,
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// we're done -- don't deliver a second identical response.
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if (networkResponse.notModified && request.hasHadResponseDelivered()) {
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request.finish("not-modified");
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continue;
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}
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// Parse the response here on the worker thread.
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Response<?> response = request.parseNetworkResponse(networkResponse);
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request.addMarker("network-parse-complete");
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// Write to cache if applicable.
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// TODO: Only update cache metadata instead of entire record for 304s.
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if (request.shouldCache() && response.cacheEntry != null) {
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mCache.put(request.getCacheKey(), response.cacheEntry);
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request.addMarker("network-cache-written");
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}
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// Post the response back.
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request.markDelivered();
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mDelivery.postResponse(request, response);
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} catch (VolleyError volleyError) {
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volleyError.setNetworkTimeMs(SystemClock.elapsedRealtime() - startTimeMs);
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parseAndDeliverNetworkError(request, volleyError);
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} catch (Exception e) {
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VolleyLog.e(e, "Unhandled exception %s", e.toString());
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VolleyError volleyError = new VolleyError(e);
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volleyError.setNetworkTimeMs(SystemClock.elapsedRealtime() - startTimeMs);
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mDelivery.postError(request, volleyError);
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}
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}
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}
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private void parseAndDeliverNetworkError(Request<?> request, VolleyError error) {
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error = request.parseNetworkError(error);
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mDelivery.postError(request, error);
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}
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}
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