| /* |
| * Copyright (C) 2007 Esmertec AG. |
| * Copyright (C) 2007 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.im.imps; |
| |
| import com.android.im.engine.ImException; |
| |
| /** |
| * The protocol binding in data channel might be WSP, HTTP and HTTPS which are |
| * asymmetric. In this case when the server needs to start transaction, it has |
| * to send a communication initiation request message through the CIR channel to |
| * the client in order to request an immediate PollingRequest message from the |
| * client to the server on the data channel. |
| */ |
| abstract class CirChannel { |
| protected ImpsConnection mConnection; |
| |
| protected CirChannel(ImpsConnection connection) { |
| mConnection = connection; |
| } |
| |
| /** |
| * Establishes the connection to the server if the protocol is connection |
| * oriented (e.g. as TCP)and starts to listen to CIR requests from the |
| * server. |
| * @throws Exception |
| */ |
| public abstract void connect() throws ImException; |
| |
| /** |
| * Re-establish the connection and drop the old one. |
| */ |
| public void reconnect(){ |
| } |
| |
| /** |
| * Tells if the CIR has been shutdown or not. |
| */ |
| public abstract boolean isShutdown(); |
| |
| /** |
| * Shutdown the CIR channel, stops to listen to CIR requests from the server. |
| * |
| */ |
| public abstract void shutdown(); |
| } |