19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Hangs onto idle live connections for a little while 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.net.http; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport org.apache.http.HttpHost; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemClock; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectclass IdleCache { 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project class Entry { 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpHost mHost; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Connection mConnection; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long mTimeout; 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int IDLE_CACHE_MAX = 8; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Allow five consecutive empty queue checks before shutdown */ 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int EMPTY_CHECK_MAX = 5; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* six second timeout for connections */ 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int TIMEOUT = 6 * 1000; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final static int CHECK_INTERVAL = 2 * 1000; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Entry[] mEntries = new Entry[IDLE_CACHE_MAX]; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mCount = 0; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private IdleReaper mThread = null; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* stats */ 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mCached = 0; 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mReused = 0; 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project IdleCache() { 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < IDLE_CACHE_MAX; i++) { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEntries[i] = new Entry(); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Caches connection, if there is room. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return true if connection cached 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized boolean cacheConnection( 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpHost host, Connection connection) { 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean ret = false; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (HttpLog.LOGV) { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpLog.v("IdleCache size " + mCount + " host " + host); 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCount < IDLE_CACHE_MAX) { 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long time = SystemClock.uptimeMillis(); 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < IDLE_CACHE_MAX; i++) { 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Entry entry = mEntries[i]; 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entry.mHost == null) { 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mHost = host; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection = connection; 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mTimeout = time + TIMEOUT; 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCount++; 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (HttpLog.LOGV) mCached++; 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ret = true; 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mThread == null) { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mThread = new IdleReaper(); 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mThread.start(); 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return ret; 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized Connection getConnection(HttpHost host) { 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Connection ret = null; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCount > 0) { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < IDLE_CACHE_MAX; i++) { 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Entry entry = mEntries[i]; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpHost eHost = entry.mHost; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (eHost != null && eHost.equals(host)) { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ret = entry.mConnection; 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mHost = null; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection = null; 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCount--; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (HttpLog.LOGV) mReused++; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return ret; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized void clear() { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; mCount > 0 && i < IDLE_CACHE_MAX; i++) { 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Entry entry = mEntries[i]; 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entry.mHost != null) { 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mHost = null; 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection.closeConnection(); 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection = null; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCount--; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private synchronized void clearIdle() { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCount > 0) { 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long time = SystemClock.uptimeMillis(); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < IDLE_CACHE_MAX; i++) { 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Entry entry = mEntries[i]; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (entry.mHost != null && time > entry.mTimeout) { 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mHost = null; 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection.closeConnection(); 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project entry.mConnection = null; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCount--; 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private class IdleReaper extends Thread { 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int check = 0; 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setName("IdleReaper"); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project android.os.Process.setThreadPriority( 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project android.os.Process.THREAD_PRIORITY_BACKGROUND); 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (IdleCache.this) { 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (check < EMPTY_CHECK_MAX) { 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project IdleCache.this.wait(CHECK_INTERVAL); 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (InterruptedException ex) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mCount == 0) { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project check++; 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project check = 0; 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project clearIdle(); 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mThread = null; 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (HttpLog.LOGV) { 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project HttpLog.v("IdleCache IdleReaper shutdown: cached " + mCached + 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project " reused " + mReused); 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mCached = 0; 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReused = 0; 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 176