Dispatch push event to worker from PushServiceImpl#OnMessage.

content/browser/push_messaging_router.cc

+// Copyright 2014 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/push_messaging_router.h"
+
+#include "base/bind.h"
+#include "content/browser/service_worker/service_worker_context_wrapper.h"
+#include "content/browser/service_worker/service_worker_registration.h"
+#include "content/browser/service_worker/service_worker_storage.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/storage_partition.h"
+
+namespace content {
+
+// static
+void PushMessagingRouter::DeliverMessage(
+    BrowserContext* browser_context,
+    const GURL& origin,
+    int64 service_worker_registration_id,
+    const std::string& data,
+    const DeliverMessageCallback& deliver_message_callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  StoragePartition* partition =
+      BrowserContext::GetStoragePartitionForSite(browser_context, origin);
+  scoped_refptr<ServiceWorkerContextWrapper> service_worker_context =
+      static_cast<ServiceWorkerContextWrapper*>(
+          partition->GetServiceWorkerContext());
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&PushMessagingRouter::FindServiceWorkerRegistration,
+                 origin,
+                 service_worker_registration_id,
+                 data,
+                 deliver_message_callback,
+                 service_worker_context));
+}
+
+// static
+void PushMessagingRouter::FindServiceWorkerRegistration(
+    const GURL& origin,
+    int64 service_worker_registration_id,
+    const std::string& data,
+    const DeliverMessageCallback& deliver_message_callback,
+    scoped_refptr<ServiceWorkerContextWrapper> service_worker_context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  // Try to acquire the registration from storage. If it's already live we'll
+  // receive it right away. If not, it will be revived from storage.
+  service_worker_context->context()->storage()->FindRegistrationForId(
+      service_worker_registration_id,
+      origin,
+      base::Bind(&PushMessagingRouter::FindServiceWorkerRegistrationCallback,
+                 data,
+                 deliver_message_callback));
+}
+
+// static
+void PushMessagingRouter::FindServiceWorkerRegistrationCallback(
+    const std::string& data,
+    const DeliverMessageCallback& deliver_message_callback,
+    ServiceWorkerStatusCode service_worker_status,
+    const scoped_refptr<ServiceWorkerRegistration>&
+        service_worker_registration) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (service_worker_status == SERVICE_WORKER_OK) {
+    // Hold on to the service worker registration in the callback to keep it
+    // alive until the callback dies. Otherwise the registration could be
+    // released when this method returns - before the event is delivered to the
+    // service worker.
+    base::Callback<void(ServiceWorkerStatusCode)> dispatch_event_callback =
+        base::Bind(&PushMessagingRouter::DeliverMessageEnd,
+                   deliver_message_callback,
+                   service_worker_registration);
+    service_worker_registration->active_version()->DispatchPushEvent(
+        dispatch_event_callback, data);
+  } else {
+    // TODO(mvanouwerkerk): UMA logging.
+    BrowserThread::PostTask(
+        BrowserThread::UI,
+        FROM_HERE,
+        base::Bind(
+            deliver_message_callback,
+            PUSH_MESSAGING_STATUS_MESSAGE_DELIVERY_FAILED_NO_SERVICE_WORKER));
+  }
+}
+
+// static
+void PushMessagingRouter::DeliverMessageEnd(
+    const DeliverMessageCallback& deliver_message_callback,
+    const scoped_refptr<ServiceWorkerRegistration>& service_worker_registration,
+    ServiceWorkerStatusCode service_worker_status) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  // TODO(mvanouwerkerk): UMA logging.
+  PushMessagingStatus push_messaging_status =
+      service_worker_status == SERVICE_WORKER_OK
+          ? PUSH_MESSAGING_STATUS_OK
+          : PUSH_MESSAGING_STATUS_MESSAGE_DELIVERY_FAILED_SERVICE_WORKER_ERROR;
+  BrowserThread::PostTask(
+      BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(deliver_message_callback, push_messaging_status));
+}
+
+}  // namespace content