1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_
6 #define SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_
10 #include "base/callback.h"
11 #include "google_apis/gcm/gcm_client.h"
13 class GoogleServiceAuthError;
17 // Delegate for GCMNetworkChannel.
18 // GCMNetworkChannel needs Register to register with GCM client and obtain gcm
19 // registration id. This id is used for building URL to cache invalidation
21 // It needs RequestToken and InvalidateToken to get access token to include it
22 // in HTTP message to server.
23 // GCMNetworkChannel lives on IO thread therefore calls will be made on IO
24 // thread and callbacks should be invoked there as well.
25 class GCMNetworkChannelDelegate {
27 typedef base::Callback<void(const GoogleServiceAuthError& error,
28 const std::string& token)> RequestTokenCallback;
29 typedef base::Callback<void(const std::string& registration_id,
30 gcm::GCMClient::Result result)> RegisterCallback;
31 typedef base::Callback<void(const std::string& message,
32 const std::string& echo_token)> MessageCallback;
34 virtual ~GCMNetworkChannelDelegate() {}
36 virtual void Initialize() = 0;
37 // Request access token. Callback should be called either with access token or
39 virtual void RequestToken(RequestTokenCallback callback) = 0;
40 // Invalidate access token that was rejected by server.
41 virtual void InvalidateToken(const std::string& token) = 0;
43 // Request registration_id from GCMService. Callback should be called with
44 // either registration id or error code.
45 virtual void Register(RegisterCallback callback) = 0;
46 // Provide callback for incoming messages from GCM.
47 virtual void SetMessageReceiver(MessageCallback callback) = 0;
51 #endif // SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_