Implement memory-persistent registration

content/browser/service_worker/service_worker_register_job.h

+// Copyright (c) 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_REGISTER_JOB_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTER_JOB_H_
+
+#include "base/memory/weak_ptr.h"
+#include "content/browser/service_worker/service_worker_registration_status.h"
+#include "content/browser/service_worker/service_worker_storage.h"
+
+namespace content {
+
+// A ServiceWorkerRegisterJob lives only for the lifetime of a single
+// registration or unregistration.
+class ServiceWorkerRegisterJob {
+ public:
+  typedef base::Callback<void(
+      ServiceWorkerRegisterJob* job,
+      ServiceWorkerRegistrationStatus status,
+      ServiceWorkerRegistration* registration)> RegistrationCompleteCallback;
+
+  // All type of jobs (Register and Unregister) complete through a
+  // single call to this callback on the IO thread.
+  ServiceWorkerRegisterJob(const base::WeakPtr<ServiceWorkerStorage>& storage,
+                           const RegistrationCompleteCallback& callback);
+  ~ServiceWorkerRegisterJob();
+
+  // The Registration flow includes most or all of the following,
+  // depending on what is already registered:
+  //  - creating a ServiceWorkerRegistration instance if there isn't
+  //    already something registered
+  //  - creating a ServiceWorkerVersion for the new registration instance.
+  //  - starting a worker for the ServiceWorkerVersion
+  //  - telling the Version to evaluate the script
+  //  - firing the 'install' event at the ServiceWorkerVersion
+  //  - firing the 'activate' event at the ServiceWorkerVersion
+  //  - Waiting for older ServiceWorkerVersions to deactivate
+  //  - designating the new version to be the 'active' version
+  // This method should be called once and only once per job.
+  void StartRegister(const GURL& pattern, const GURL& script_url);
+
+  // The Unregistration process is primarily cleanup, removing
+  // everything that was created during the Registration process,
+  // including the ServiceWorkerRegistration itself.
+  // This method should be called once and only once per job.
+  void StartUnregister(const GURL& pattern);
+
+ private:
+  // These are all steps in the registration and unregistration pipeline.
+  void RegisterPatternAndContinue(
+      const GURL& pattern,
+      const GURL& script_url,
+      const ServiceWorkerStorage::RegistrationCallback& callback,
+      ServiceWorkerRegistrationStatus previous_status);
+
+  void UnregisterPatternAndContinue(
+      const GURL& pattern,
+      const GURL& script_url,
+      const ServiceWorkerStorage::UnregistrationCallback& callback,
+      ServiceWorkerRegistrationStatus previous_status,
+      const scoped_refptr<ServiceWorkerRegistration>& previous_registration);
+
+  // These methods are the last internal callback in the callback
+  // chain, and ultimately call callback_.
+  void UnregisterComplete(ServiceWorkerRegistrationStatus status);
+  void RegisterComplete(
+      ServiceWorkerRegistrationStatus status,
+      const scoped_refptr<ServiceWorkerRegistration>& registration);
+
+  const base::WeakPtr<ServiceWorkerStorage> storage_;
+  const RegistrationCompleteCallback callback_;
+  base::WeakPtrFactory<ServiceWorkerRegisterJob> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegisterJob);
+};
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTER_JOB_H_