1 /* 2 * Copyright (C) 2008 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 android.net.http; 18 19 import android.content.Context; 20 import android.os.SystemClock; 21 22 import org.apache.http.HttpHost; 23 24 import java.lang.Thread; 25 26 /** 27 * {@hide} 28 */ 29 class ConnectionThread extends Thread { 30 31 static final int WAIT_TIMEOUT = 5000; 32 static final int WAIT_TICK = 1000; 33 34 // Performance probe 35 long mCurrentThreadTime; 36 long mTotalThreadTime; 37 38 private boolean mWaiting; 39 private volatile boolean mRunning = true; 40 private Context mContext; 41 private RequestQueue.ConnectionManager mConnectionManager; 42 private RequestFeeder mRequestFeeder; 43 44 private int mId; 45 Connection mConnection; 46 ConnectionThread(Context context, int id, RequestQueue.ConnectionManager connectionManager, RequestFeeder requestFeeder)47 ConnectionThread(Context context, 48 int id, 49 RequestQueue.ConnectionManager connectionManager, 50 RequestFeeder requestFeeder) { 51 super(); 52 mContext = context; 53 setName("http" + id); 54 mId = id; 55 mConnectionManager = connectionManager; 56 mRequestFeeder = requestFeeder; 57 } 58 requestStop()59 void requestStop() { 60 synchronized (mRequestFeeder) { 61 mRunning = false; 62 mRequestFeeder.notify(); 63 } 64 } 65 66 /** 67 * Loop until app shutdown. Runs connections in priority 68 * order. 69 */ run()70 public void run() { 71 android.os.Process.setThreadPriority( 72 android.os.Process.THREAD_PRIORITY_DEFAULT + 73 android.os.Process.THREAD_PRIORITY_LESS_FAVORABLE); 74 75 // these are used to get performance data. When it is not in the timing, 76 // mCurrentThreadTime is 0. When it starts timing, mCurrentThreadTime is 77 // first set to -1, it will be set to the current thread time when the 78 // next request starts. 79 mCurrentThreadTime = 0; 80 mTotalThreadTime = 0; 81 82 while (mRunning) { 83 if (mCurrentThreadTime == -1) { 84 mCurrentThreadTime = SystemClock.currentThreadTimeMillis(); 85 } 86 87 Request request; 88 89 /* Get a request to process */ 90 request = mRequestFeeder.getRequest(); 91 92 /* wait for work */ 93 if (request == null) { 94 synchronized(mRequestFeeder) { 95 if (HttpLog.LOGV) HttpLog.v("ConnectionThread: Waiting for work"); 96 mWaiting = true; 97 try { 98 mRequestFeeder.wait(); 99 } catch (InterruptedException e) { 100 } 101 mWaiting = false; 102 if (mCurrentThreadTime != 0) { 103 mCurrentThreadTime = SystemClock 104 .currentThreadTimeMillis(); 105 } 106 } 107 } else { 108 if (HttpLog.LOGV) HttpLog.v("ConnectionThread: new request " + 109 request.mHost + " " + request ); 110 111 HttpHost proxy = mConnectionManager.getProxyHost(); 112 113 HttpHost host; 114 if (false) { 115 // Allow https proxy 116 host = proxy == null ? request.mHost : proxy; 117 } else { 118 // Disallow https proxy -- tmob proxy server 119 // serves a request loop for https reqs 120 host = (proxy == null || 121 request.mHost.getSchemeName().equals("https")) ? 122 request.mHost : proxy; 123 } 124 mConnection = mConnectionManager.getConnection(mContext, host); 125 mConnection.processRequests(request); 126 if (mConnection.getCanPersist()) { 127 if (!mConnectionManager.recycleConnection(host, 128 mConnection)) { 129 mConnection.closeConnection(); 130 } 131 } else { 132 mConnection.closeConnection(); 133 } 134 mConnection = null; 135 136 if (mCurrentThreadTime > 0) { 137 long start = mCurrentThreadTime; 138 mCurrentThreadTime = SystemClock.currentThreadTimeMillis(); 139 mTotalThreadTime += mCurrentThreadTime - start; 140 } 141 } 142 143 } 144 } 145 toString()146 public synchronized String toString() { 147 String con = mConnection == null ? "" : mConnection.toString(); 148 String active = mWaiting ? "w" : "a"; 149 return "cid " + mId + " " + active + " " + con; 150 } 151 152 } 153