1 /* 2 * Copyright (C) 2010 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; 18 19 import java.util.Map; 20 21 /** 22 * Interface used to get feedback about a {@link android.net.LinkSocket}. Instance is optionally 23 * passed when a LinkSocket is constructed. Multiple LinkSockets may use the same notifier. 24 * @hide 25 */ 26 public interface LinkSocketNotifier { 27 /** 28 * This callback function will be called if a better link 29 * becomes available. 30 * TODO - this shouldn't be checked for all cases - what's the conditional 31 * flag? 32 * If the duplicate socket is accepted, the original will be marked invalid 33 * and additional use will throw exceptions. 34 * @param original the original LinkSocket 35 * @param duplicate the new LinkSocket that better meets the application 36 * requirements 37 * @return {@code true} if the application intends to use this link 38 * 39 * REM 40 * TODO - how agressive should we be? 41 * At a minimum CS tracks which LS have this turned on and tracks the requirements 42 * When a new link becomes available, automatically check if any of the LinkSockets 43 * will care. 44 * If found, grab a refcount on the link so it doesn't go away and send notification 45 * Optionally, periodically setup connection on available networks to check for better links 46 * Maybe pass this info into the LinkFactories so condition changes can be acted on more quickly 47 */ 48 public boolean onBetterLinkAvailable(LinkSocket original, LinkSocket duplicate); 49 50 /** 51 * This callback function will be called when a LinkSocket no longer has 52 * an active link. 53 * @param socket the LinkSocket that lost its link 54 * 55 * REM 56 * NetworkStateTracker tells us it is disconnected 57 * CS checks the table for LS on that link 58 * CS calls each callback (need to work out p2p cross process callback) 59 */ 60 public void onLinkLost(LinkSocket socket); 61 62 /** 63 * This callback function will be called when an application calls 64 * requestNewLink on a LinkSocket but the LinkSocket is unable to find 65 * a suitable new link. 66 * @param socket the LinkSocket for which a new link was not found 67 * TODO - why the diff between initial request (sync) and requestNewLink? 68 * 69 * REM 70 * CS process of trying to find a new link must track the LS that started it 71 * on failure, call callback 72 */ 73 public void onNewLinkUnavailable(LinkSocket socket); 74 75 /** 76 * This callback function will be called when any of the notification-marked 77 * capabilities of the LinkSocket (e.g. upstream bandwidth) have changed. 78 * @param socket the linkSocet for which capabilities have changed 79 * @param changedCapabilities the set of capabilities that the application 80 * is interested in and have changed (with new values) 81 * 82 * REM 83 * Maybe pass the interesting capabilities into the Links. 84 * Get notified of every capability change 85 * check for LinkSockets on that Link that are interested in that Capability - call them 86 */ 87 public void onCapabilitiesChanged(LinkSocket socket, LinkCapabilities changedCapabilities); 88 } 89
