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// 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 <memory>
#include <set>
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "content/browser/service_worker/service_worker_lifetime_tracker.h"
#include "content/common/content_export.h"
#include "content/common/service_worker/service_worker_status_code.h"
namespace IPC {
class Message;
}
namespace content {
class EmbeddedWorkerInstance;
class ServiceWorkerContextCore;
class ServiceWorkerVersion;
// 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 CONTENT_EXPORT EmbeddedWorkerRegistry
: public base::RefCounted<EmbeddedWorkerRegistry> {
public:
static scoped_refptr<EmbeddedWorkerRegistry> Create(
const base::WeakPtr<ServiceWorkerContextCore>& context);
// Used for DeleteAndStartOver. Creates a new registry which takes over
// |next_embedded_worker_id_| and |process_sender_map_| from |old_registry|.
static scoped_refptr<EmbeddedWorkerRegistry> Create(
const base::WeakPtr<ServiceWorkerContextCore>& context,
EmbeddedWorkerRegistry* old_registry);
bool OnMessageReceived(const IPC::Message& message, int process_id);
// Creates and removes a new worker instance entry for bookkeeping.
// This doesn't actually start or stop the worker.
std::unique_ptr<EmbeddedWorkerInstance> CreateWorker(
ServiceWorkerVersion* owner_version);
// Stop all running workers, even if they're handling events.
void Shutdown();
// Called by EmbeddedWorkerInstance when it starts or stops. This registry
// keeps track of running workers.
bool OnWorkerStarted(int process_id, int embedded_worker_id);
void OnWorkerStopped(int process_id, int embedded_worker_id);
// Called by EmbeddedWorkerInstance when it learns DevTools has attached to
// it.
void OnDevToolsAttached(int embedded_worker_id);
// Returns an embedded worker instance for given |embedded_worker_id|.
EmbeddedWorkerInstance* GetWorker(int embedded_worker_id);
// Returns true if |embedded_worker_id| is managed by this registry.
bool CanHandle(int embedded_worker_id) const;
private:
friend class base::RefCounted<EmbeddedWorkerRegistry>;
friend class MojoEmbeddedWorkerInstanceTest;
friend class EmbeddedWorkerInstance;
friend class EmbeddedWorkerInstanceTest;
FRIEND_TEST_ALL_PREFIXES(EmbeddedWorkerInstanceTest,
RemoveWorkerInSharedProcess);
using WorkerInstanceMap = std::map<int, EmbeddedWorkerInstance*>;
EmbeddedWorkerRegistry(
const base::WeakPtr<ServiceWorkerContextCore>& context,
int initial_embedded_worker_id);
~EmbeddedWorkerRegistry();
// Called when EmbeddedWorkerInstance is ready for IPC. This function
// prepares a route to the child worker thread.
// TODO(shimazu): Remove this function once mojofication is completed.
void BindWorkerToProcess(int process_id, int embedded_worker_id);
// RemoveWorker is called when EmbeddedWorkerInstance is destructed.
// |process_id| could be invalid (i.e. ChildProcessHost::kInvalidUniqueID)
// if it's not running.
void RemoveWorker(int process_id, int embedded_worker_id);
// Removes the bookkeeping that binds the worker to the process. This is
// called instead of WorkerStopped() in cases when the worker could not be
// cleanly stopped, e.g., because connection with the renderer was lost.
void DetachWorker(int process_id, int embedded_worker_id);
EmbeddedWorkerInstance* GetWorkerForMessage(int process_id,
int embedded_worker_id);
base::WeakPtr<ServiceWorkerContextCore> context_;
WorkerInstanceMap worker_map_;
// Map from process_id to embedded_worker_id.
// This map only contains starting and running workers.
std::map<int, std::set<int> > worker_process_map_;
int next_embedded_worker_id_;
const int initial_embedded_worker_id_;
ServiceWorkerLifetimeTracker lifetime_tracker_;
DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerRegistry);
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_REGISTRY_H_
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