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Side by Side Diff: content/common/mojo/embedded_application_runner.h

Issue 1882423004: Move shell service to toplevel shell namespace (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: rebase Created 4 years, 8 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_ 5 #ifndef CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_
6 #define CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_ 6 #define CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_
7 7
8 #include <memory> 8 #include <memory>
9 9
10 #include "base/callback.h" 10 #include "base/callback.h"
11 #include "base/macros.h" 11 #include "base/macros.h"
12 #include "base/memory/ref_counted.h" 12 #include "base/memory/ref_counted.h"
13 #include "base/single_thread_task_runner.h" 13 #include "base/single_thread_task_runner.h"
14 #include "services/shell/public/cpp/shell_client.h" 14 #include "services/shell/public/cpp/shell_client.h"
15 #include "services/shell/public/interfaces/shell_client.mojom.h" 15 #include "services/shell/public/interfaces/shell_client.mojom.h"
16 16
17 namespace content { 17 namespace content {
18 18
19 // Hosts an in-process application instance that supports multiple ShellClient 19 // Hosts an in-process application instance that supports multiple ShellClient
20 // connections. The first incoming connection will invoke a provided factory 20 // connections. The first incoming connection will invoke a provided factory
21 // function to instantiate the application, and the application will 21 // function to instantiate the application, and the application will
22 // automatically be torn down when its last connection is lost. The application 22 // automatically be torn down when its last connection is lost. The application
23 // may be launched and torn down multiple times by a single 23 // may be launched and torn down multiple times by a single
24 // EmbeddedApplicationRunner instance. 24 // EmbeddedApplicationRunner instance.
25 class EmbeddedApplicationRunner { 25 class EmbeddedApplicationRunner {
26 public: 26 public:
27 using FactoryCallback = 27 using FactoryCallback = base::Callback<std::unique_ptr<shell::ShellClient>()>;
28 base::Callback<std::unique_ptr<mojo::ShellClient>()>;
29 28
30 // Constructs a runner which hosts the application on |task_runner|'s thread. 29 // Constructs a runner which hosts the application on |task_runner|'s thread.
31 // If an existing instance of the app is not running when an incoming 30 // If an existing instance of the app is not running when an incoming
32 // connection is made, |callback| will be run on |task_runner|'s thread to 31 // connection is made, |callback| will be run on |task_runner|'s thread to
33 // create a new instance which will live on that thread. 32 // create a new instance which will live on that thread.
34 EmbeddedApplicationRunner( 33 EmbeddedApplicationRunner(
35 const FactoryCallback& callback, 34 const FactoryCallback& callback,
36 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner); 35 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
37 36
38 ~EmbeddedApplicationRunner(); 37 ~EmbeddedApplicationRunner();
39 38
40 // Binds an incoming ShellClientRequest for this application. If the 39 // Binds an incoming ShellClientRequest for this application. If the
41 // application isn't already running, it's started. Otherwise the request is 40 // application isn't already running, it's started. Otherwise the request is
42 // bound to the running instance. 41 // bound to the running instance.
43 void BindShellClientRequest(mojo::shell::mojom::ShellClientRequest request); 42 void BindShellClientRequest(shell::mojom::ShellClientRequest request);
44 43
45 private: 44 private:
46 class Instance; 45 class Instance;
47 46
48 // The TaskRunner on which the factory callback will be run. The 47 // The TaskRunner on which the factory callback will be run. The
49 // mojo::ShellClient it returns will live and die on this TaskRunner's thread. 48 // shell::ShellClient it returns will live and die on this TaskRunner's
49 // thread.
50 const scoped_refptr<base::SingleThreadTaskRunner> application_task_runner_; 50 const scoped_refptr<base::SingleThreadTaskRunner> application_task_runner_;
51 51
52 // A reference to the application instance which may operate on the 52 // A reference to the application instance which may operate on the
53 // |application_task_runner_|'s thread. 53 // |application_task_runner_|'s thread.
54 scoped_refptr<Instance> instance_; 54 scoped_refptr<Instance> instance_;
55 55
56 DISALLOW_COPY_AND_ASSIGN(EmbeddedApplicationRunner); 56 DISALLOW_COPY_AND_ASSIGN(EmbeddedApplicationRunner);
57 }; 57 };
58 58
59 } // namespace content 59 } // namespace content
60 60
61 #endif // CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_ 61 #endif // CONTENT_COMMON_MOJO_EMBEDDED_APPLICATION_RUNNER_H_
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