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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. | |
4 | |
5 part of application; | |
6 | |
7 typedef Object ServiceFactory(core.MojoMessagePipeEndpoint endpoint); | |
8 typedef void FallbackServiceFactory( | |
9 String interfaceName, core.MojoMessagePipeEndpoint endpoint); | |
10 | |
11 class LocalServiceProvider implements ServiceProvider { | |
12 final ApplicationConnection connection; | |
13 ServiceProviderStub _stub; | |
14 | |
15 LocalServiceProvider(this.connection, this._stub) { | |
16 assert(_stub.isOpen); | |
17 _stub.impl = this; | |
18 } | |
19 | |
20 set onError(Function f) { | |
21 _stub.onError = f; | |
22 } | |
23 | |
24 Future close({bool immediate: false}) => _stub.close(immediate: immediate); | |
25 | |
26 void connectToService( | |
27 String interfaceName, core.MojoMessagePipeEndpoint pipe) { | |
28 if (connection._nameToServiceFactory.containsKey(interfaceName)) { | |
29 connection._nameToServiceFactory[interfaceName](pipe); | |
30 return; | |
31 } | |
32 if (connection.fallbackServiceFactory != null) { | |
33 connection.fallbackServiceFactory(interfaceName, pipe); | |
34 return; | |
35 } | |
36 // The specified interface isn't provided. Close the pipe so the | |
37 // remote endpoint sees that we don't support this interface. | |
38 pipe.close(); | |
39 } | |
40 } | |
41 | |
42 // Encapsulates a pair of ServiceProviders that enable services (interface | |
43 // implementations) to be provided to a remote application as well as exposing | |
44 // services provided by a remote application. ApplicationConnection | |
45 // objects are returned by the Application ConnectToApplication() method | |
46 // and they're passed to the Application AcceptConnection() method. | |
47 // | |
48 // To request a service from the remote application: | |
49 // var proxy = applicationConnection.requestService(ViewManagerClientName); | |
50 // | |
51 // To provide a service to the remote application, specify a function that | |
52 // returns a service. For example: | |
53 // applicationConnection.provideService(ViewManagerClientName, (pipe) => | |
54 // new ViewManagerClientImpl(pipe)); | |
55 // | |
56 // To handle requests for any interface, set fallbackServiceFactory to a | |
57 // function that takes ownership of the incoming message pipe endpoint. If the | |
58 // fallbackServiceFactory function doesn't bind the pipe, it should close it. | |
59 // | |
60 // The fallbackServiceFactory is only used if a service wasn't specified | |
61 // with provideService(). | |
62 | |
63 class ApplicationConnection { | |
64 ServiceProviderProxy remoteServiceProvider; | |
65 LocalServiceProvider _localServiceProvider; | |
66 final _nameToServiceFactory = new Map<String, ServiceFactory>(); | |
67 FallbackServiceFactory _fallbackServiceFactory; | |
68 core.ErrorHandler onError; | |
69 | |
70 ApplicationConnection(ServiceProviderStub stub, this.remoteServiceProvider) { | |
71 if (stub != null) { | |
72 _localServiceProvider = new LocalServiceProvider(this, stub); | |
73 _localServiceProvider.onError = _errorHandler; | |
74 } | |
75 } | |
76 | |
77 FallbackServiceFactory get fallbackServiceFactory => _fallbackServiceFactory; | |
78 set fallbackServiceFactory(FallbackServiceFactory f) { | |
79 assert(_localServiceProvider != null); | |
80 _fallbackServiceFactory = f; | |
81 } | |
82 | |
83 bindings.ProxyBase requestService(bindings.ProxyBase proxy) { | |
84 assert(!proxy.impl.isBound && | |
85 (remoteServiceProvider != null) && | |
86 remoteServiceProvider.impl.isBound); | |
87 var pipe = new core.MojoMessagePipe(); | |
88 proxy.impl.bind(pipe.endpoints[0]); | |
89 remoteServiceProvider.ptr.connectToService(proxy.name, pipe.endpoints[1]); | |
90 return proxy; | |
91 } | |
92 | |
93 void provideService(String interfaceName, ServiceFactory factory) { | |
94 assert(_localServiceProvider != null); | |
95 _nameToServiceFactory[interfaceName] = factory; | |
96 } | |
97 | |
98 void _errorHandler() { | |
99 close().then((_) { | |
100 if (onError != null) onError(); | |
101 }); | |
102 } | |
103 | |
104 Future close({bool immediate: false}) { | |
105 var rspCloseFuture; | |
106 var lspCloseFuture; | |
107 if (remoteServiceProvider != null) { | |
108 rspCloseFuture = remoteServiceProvider.close(); | |
109 remoteServiceProvider = null; | |
110 } else { | |
111 rspCloseFuture = new Future.value(null); | |
112 } | |
113 if (_localServiceProvider != null) { | |
114 lspCloseFuture = _localServiceProvider.close(immediate: immediate); | |
115 _localServiceProvider = null; | |
116 } else { | |
117 lspCloseFuture = new Future.value(null); | |
118 } | |
119 return rspCloseFuture.then((_) => lspCloseFuture); | |
120 } | |
121 } | |
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