EmbeddedWorker, browser side code

content/browser/service_worker/embedded_worker_registry.h

+// 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_EMBEDDED_WORKER_REGISTRY_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_REGISTRY_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+
+class GURL;
+
+namespace IPC {
+class Message;
+class Sender;
+}
+
+namespace content {
+
+class EmbeddedWorkerInstance;
+class ServiceWorkerContextCore;
+
+// Acts as a thin stub between MessageFilter and each EmbeddedWorkerInstance,
+// which sends/receives messages to/from each EmbeddedWorker in child process.
+//
+// Hangs off ServiceWorkerContextCore (its reference is also held by each
+// EmbeddedWorkerInstance).  Operated only on IO thread.
+class EmbeddedWorkerRegistry
+    : public base::RefCounted<EmbeddedWorkerRegistry> {
+ public:
+  explicit EmbeddedWorkerRegistry(
+      base::WeakPtr<ServiceWorkerContextCore> context);
+
+  // Creates and removes a new worker instance entry for bookkeeping.
+  // This doesn't actually start or stop the worker.
+  scoped_ptr<EmbeddedWorkerInstance> CreateWorker();
+  void RemoveWorker(int embedded_worker_id);
+
+  // Called from EmbeddedWorkerInstance, relayed to the child process.
+  bool StartWorker(int process_id,
+                   int embedded_worker_id,
+                   int64 service_worker_version_id,
+                   const GURL& script_url);
+  bool StopWorker(int process_id,
+                  int embedded_worker_id);
+
+  // Keeps a map from process_id to sender information.
+  void AddChildProcessSender(int process_id, IPC::Sender* sender);
+  void RemoveChildProcessSender(int process_id);
+
+ private:
+  friend class RefCounted<EmbeddedWorkerRegistry>;
+
+  ~EmbeddedWorkerRegistry();
+  bool Send(int process_id, IPC::Message* message);
+
+  typedef std::map<int, EmbeddedWorkerInstance*> WorkerInstanceMap;
+  typedef std::map<int, IPC::Sender*> ProcessToSenderMap;
+
+  base::WeakPtr<ServiceWorkerContextCore> context_;
+
+  WorkerInstanceMap worker_map_;
+  ProcessToSenderMap process_sender_map_;
+
+  int next_embedded_worker_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerRegistry);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_REGISTRY_H_