ServiceWorker: add ServiceWorkerClients.claim() support (2/3).

content/browser/service_worker/service_worker_version.cc

 // 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.
 
 #include "content/browser/service_worker/service_worker_version.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/stl_util.h"
 #include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/message_port_service.h"
 #include "content/browser/service_worker/embedded_worker_instance.h"
 #include "content/browser/service_worker/embedded_worker_registry.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/browser/service_worker/service_worker_utils.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/content_switches.h"
@@ skipping 43 matching lines @@
 // (Note that if all references to the version is dropped the worker
 // is also stopped without delay)
 const int64 kStopWorkerDelay = 30;  // 30 secs.
 
 // Delay for attempting to stop a doomed worker with in-flight requests.
 const int64 kStopDoomedWorkerDelay = 5;  // 5 secs.
 
 // Default delay for scheduled update.
 const int kUpdateDelaySeconds = 1;
 
+const char kClaimClientsStateErrorMesage[] =
+    "Only active worker can claim clients.";

[falken, 2015/01/26 08:45:13]

s/Only active/Only the active/

[xiang, 2015/01/28 05:38:35]

Done.

+
+const char kClaimClientsShutdownErrorMesage[] =
+    "Failed to claim clients due to ServiceWorker system shutdown.";

[falken, 2015/01/26 08:45:13]

s/ServiceWorker/Service Worker/

[xiang, 2015/01/28 05:38:35]

Done.

+
 void RunSoon(const base::Closure& callback) {
   if (!callback.is_null())
     base::MessageLoop::current()->PostTask(FROM_HERE, callback);
 }
 
 template <typename CallbackArray, typename Arg>
 void RunCallbacks(ServiceWorkerVersion* version,
                   CallbackArray* callbacks_ptr,
                   const Arg& arg) {
   CallbackArray callbacks;
@@ skipping 709 matching lines @@
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_PostMessageToDocument,
                         OnPostMessageToDocument)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_FocusClient,
                         OnFocusClient)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_GetClientInfoSuccess,
                         OnGetClientInfoSuccess)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_GetClientInfoError,
                         OnGetClientInfoError)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_SkipWaiting,
                         OnSkipWaiting)
+    IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_ClaimClients,
+                        OnClaimClients)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ServiceWorkerVersion::OnStartMessageSent(
     ServiceWorkerStatusCode status) {
   if (status != SERVICE_WORKER_OK)
     RunCallbacks(this, &start_callbacks_, status);
 }
@@ skipping 285 matching lines @@
   pending_skip_waiting_requests_.push_back(request_id);
   if (pending_skip_waiting_requests_.size() == 1)
     registration->ActivateWaitingVersionWhenReady();
 }
 
 void ServiceWorkerVersion::DidSkipWaiting(int request_id) {
   if (running_status() == STARTING || running_status() == RUNNING)
     embedded_worker_->SendMessage(ServiceWorkerMsg_DidSkipWaiting(request_id));
 }
 
+void ServiceWorkerVersion::OnClaimClients(int request_id) {
+  if (status_ != ACTIVATING && status_ != ACTIVATED) {
+    embedded_worker_->SendMessage(ServiceWorkerMsg_ClaimClientsError(
+        request_id, blink::WebServiceWorkerError::ErrorTypeState,
+        base::ASCIIToUTF16(kClaimClientsStateErrorMesage)));
+    return;
+  }
+
+  ServiceWorkerRegistration* registration = NULL;
+  if (!context_ ||
+      !(registration = context_->GetLiveRegistration(registration_id_))) {
+    embedded_worker_->SendMessage(ServiceWorkerMsg_ClaimClientsError(
+        request_id, blink::WebServiceWorkerError::ErrorTypeAbort,
+        base::ASCIIToUTF16(kClaimClientsShutdownErrorMesage)));
+    return;
+  }

[falken, 2015/01/26 08:45:13]

maybe add DCHECK_EQ(this, registration->active_version()) here

[xiang, 2015/01/28 05:38:35]

Done.

+  registration->ClaimClients();
+  embedded_worker_->SendMessage(ServiceWorkerMsg_DidClaimClients(request_id));
+}
+
 void ServiceWorkerVersion::DidGetClientInfo(
     int client_id,
     scoped_refptr<GetClientDocumentsCallback> callback,
     ServiceWorkerStatusCode status,
     const ServiceWorkerClientInfo& info) {
   if (status == SERVICE_WORKER_OK)
     callback->AddClientInfo(client_id, info);
 }
 
 void ServiceWorkerVersion::ScheduleStopWorker() {
@@ skipping 54 matching lines @@
     int request_id) {
   callbacks->Remove(request_id);
   if (is_doomed_) {
     // The stop should be already scheduled, but try to stop immediately, in
     // order to release worker resources soon.
     StopWorkerIfIdle();
   }
 }
 
 }  // namespace content