| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_ |
| #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "content/common/content_export.h" |
| |
| class GURL; |
| |
| namespace content { |
| |
| class EmbeddedWorkerInstance; |
| class EmbeddedWorkerRegistry; |
| class ServiceWorkerProviderHost; |
| class ServiceWorkerRegistration; |
| |
| // This class corresponds to a specific version of a ServiceWorker |
| // script for a given pattern. When a script is upgraded, there may be |
| // more than one ServiceWorkerVersion "running" at a time, but only |
| // one of them is active. This class connects the actual script with a |
| // running worker. |
| // Instances of this class are in one of two install states: |
| // - Pending: The script is in the process of being installed. There |
| // may be another active script running. |
| // - Active: The script is the only worker handling requests for the |
| // registration's pattern. |
| // |
| // In addition, a version has a running state (this is a rough |
| // sketch). Since a service worker can be stopped and started at any |
| // time, it will transition among these states multiple times during |
| // its lifetime. |
| // - Stopped: The script is not running |
| // - Starting: A request to fire an event against the version has been |
| // queued, but the worker is not yet |
| // loaded/initialized/etc. |
| // - Started: The worker is ready to receive events |
| // - Stopping: The worker is returning to the stopped state. |
| // |
| // The worker can "run" in both the Pending and the Active |
| // install states above. During the Pending state, the worker is only |
| // started in order to fire the 'install' and 'activate' |
| // events. During the Active state, it can receive other events such |
| // as 'fetch'. |
| // |
| // And finally, is_shutdown_ is detects the live-ness of the object |
| // itself. If the object is shut down, then it is in the process of |
| // being deleted from memory. This happens when a version is replaced |
| // as well as at browser shutdown. |
| class CONTENT_EXPORT ServiceWorkerVersion |
| : NON_EXPORTED_BASE(public base::RefCounted<ServiceWorkerVersion>) { |
| public: |
| ServiceWorkerVersion( |
| ServiceWorkerRegistration* registration, |
| EmbeddedWorkerRegistry* worker_registry, |
| int64 version_id); |
| |
| int64 version_id() const { return version_id_; } |
| |
| void Shutdown(); |
| bool is_shutdown() const { return is_shutdown_; } |
| |
| // Starts and stops an embedded worker for this version. |
| void StartWorker(); |
| void StopWorker(); |
| |
| // Called when this version is associated to a provider host. |
| // Non-null |provider_host| must be given. |
| void OnAssociateProvider(ServiceWorkerProviderHost* provider_host); |
| void OnUnassociateProvider(ServiceWorkerProviderHost* provider_host); |
| |
| private: |
| friend class base::RefCounted<ServiceWorkerVersion>; |
| |
| ~ServiceWorkerVersion(); |
| |
| const int64 version_id_; |
| |
| bool is_shutdown_; |
| scoped_refptr<ServiceWorkerRegistration> registration_; |
| |
| scoped_ptr<EmbeddedWorkerInstance> embedded_worker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_ |