DevTools: Merge WorkerInfo into EmbeddedWorkerDevToolsAgentHost

content/browser/devtools/embedded_worker_devtools_manager.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/devtools/embedded_worker_devtools_manager.h"
 
 #include "content/browser/devtools/devtools_manager_impl.h"
 #include "content/browser/devtools/devtools_protocol.h"
 #include "content/browser/devtools/devtools_protocol_constants.h"
 #include "content/browser/devtools/ipc_devtools_agent_host.h"
@@ skipping 23 matching lines @@
   RenderProcessHost* host = RenderProcessHost::FromID(worker_id.first);
   if (!host) {
     delete message;
     return false;
   }
   message->set_routing_id(worker_id.second);
   host->Send(message);
   return true;
 }
 
+enum WorkerState {
+  WORKER_UNINSPECTED,
+  WORKER_INSPECTED,
+  WORKER_TERMINATED,
+  WORKER_PAUSED_FOR_DEBUG_ON_START,
+  WORKER_PAUSED_FOR_REATTACH,
+};
+
 }  // namespace
 
 EmbeddedWorkerDevToolsManager::ServiceWorkerIdentifier::ServiceWorkerIdentifier(
     const ServiceWorkerContextCore* const service_worker_context,
     int64 service_worker_version_id)
     : service_worker_context_(service_worker_context),
       service_worker_version_id_(service_worker_version_id) {
 }
 
 EmbeddedWorkerDevToolsManager::ServiceWorkerIdentifier::ServiceWorkerIdentifier(
     const ServiceWorkerIdentifier& other)
     : service_worker_context_(other.service_worker_context_),
       service_worker_version_id_(other.service_worker_version_id_) {
 }
 
 bool EmbeddedWorkerDevToolsManager::ServiceWorkerIdentifier::Matches(
     const ServiceWorkerIdentifier& other) const {
   return service_worker_context_ == other.service_worker_context_ &&
          service_worker_version_id_ == other.service_worker_version_id_;
 }
 
-EmbeddedWorkerDevToolsManager::WorkerInfo::WorkerInfo(
-    const SharedWorkerInstance& instance)
-    : shared_worker_instance_(new SharedWorkerInstance(instance)),
-      state_(WORKER_UNINSPECTED),
-      agent_host_(NULL) {
-}
-
-EmbeddedWorkerDevToolsManager::WorkerInfo::WorkerInfo(
-    const ServiceWorkerIdentifier& service_worker_id)
-    : service_worker_id_(new ServiceWorkerIdentifier(service_worker_id)),
-      state_(WORKER_UNINSPECTED),
-      agent_host_(NULL) {
-}
-
-bool EmbeddedWorkerDevToolsManager::WorkerInfo::Matches(
-    const SharedWorkerInstance& other) {
-  if (!shared_worker_instance_)
-    return false;
-  return shared_worker_instance_->Matches(other);
-}
-
-bool EmbeddedWorkerDevToolsManager::WorkerInfo::Matches(
-    const ServiceWorkerIdentifier& other) {
-  if (!service_worker_id_)
-    return false;
-  return service_worker_id_->Matches(other);
-}
-
-EmbeddedWorkerDevToolsManager::WorkerInfo::~WorkerInfo() {
-}
-
 class EmbeddedWorkerDevToolsManager::EmbeddedWorkerDevToolsAgentHost
     : public IPCDevToolsAgentHost,
       public IPC::Listener {
  public:
-  explicit EmbeddedWorkerDevToolsAgentHost(WorkerId worker_id)
-      : worker_id_(worker_id), worker_attached_(false) {
-    AttachToWorker();
+  EmbeddedWorkerDevToolsAgentHost(
+      WorkerId worker_id,
+      const SharedWorkerInstance& shared_worker)
+      : shared_worker_(new SharedWorkerInstance(shared_worker)),
+        state_(WORKER_UNINSPECTED),
+        worker_id_(worker_id) {
+    WorkerCreated();
+  }
+
+  EmbeddedWorkerDevToolsAgentHost(
+      WorkerId worker_id,
+      const ServiceWorkerIdentifier& service_worker,
+      bool debug_service_worker_on_start)
+      : service_worker_(new ServiceWorkerIdentifier(service_worker)),
+        state_(WORKER_UNINSPECTED),
+        worker_id_(worker_id) {
+    if (debug_service_worker_on_start)
+      state_ = WORKER_PAUSED_FOR_DEBUG_ON_START;
+    WorkerCreated();
   }
 
   // DevToolsAgentHost override.
   virtual bool IsWorker() const OVERRIDE { return true; }
 
   // IPCDevToolsAgentHost implementation.
   virtual void SendMessageToAgent(IPC::Message* message) OVERRIDE {
-    if (worker_attached_)
+    if (state_ == WORKER_INSPECTED)
       SendMessageToWorker(worker_id_, message);
     else
       delete message;
   }
+
   virtual void Attach() OVERRIDE {
-    AttachToWorker();
+    if (state_ != WORKER_INSPECTED) {
+      state_ = WORKER_INSPECTED;
+      AttachToWorker();
+    }
     IPCDevToolsAgentHost::Attach();
   }
+
   virtual void OnClientAttached() OVERRIDE {}
-  virtual void OnClientDetached() OVERRIDE { DetachFromWorker(); }
+
+  virtual void OnClientDetached() OVERRIDE {
+    if (state_ == WORKER_INSPECTED) {
+      state_ = WORKER_UNINSPECTED;
+      DetachFromWorker();
+    }
+  }
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerDevToolsAgentHost, msg)
     IPC_MESSAGE_HANDLER(DevToolsClientMsg_DispatchOnInspectorFrontend,
                         OnDispatchOnInspectorFrontend)
     IPC_MESSAGE_HANDLER(DevToolsHostMsg_SaveAgentRuntimeState,
                         OnSaveAgentRuntimeState)
     IPC_MESSAGE_UNHANDLED(handled = false)
     IPC_END_MESSAGE_MAP()
     return handled;
   }
 
-  void ReattachToWorker(WorkerId worker_id) {
-    CHECK(!worker_attached_);
+  void WorkerContextStarted() {
+    if (state_ == WORKER_PAUSED_FOR_DEBUG_ON_START) {
+      RenderProcessHost* rph = RenderProcessHost::FromID(worker_id_.first);
+      DevToolsManagerImpl::GetInstance()->Inspect(
+          rph->GetBrowserContext(), this);
+    } else if (state_ == WORKER_PAUSED_FOR_REATTACH && IsAttached()) {
+      state_ = WORKER_INSPECTED;
+      AttachToWorker();
+      Reattach(saved_agent_state_);
+    }
+  }
+
+  void WorkerRestarted(WorkerId worker_id) {
+    DCHECK_EQ(state_, WORKER_TERMINATED);

[dgozman, 2014/08/07 17:07:21]

DCHECK_EQ (as well as other comparison macros like EXPECT_NE) assume that first
parameter is expected to show nice message.

+    state_ = WORKER_PAUSED_FOR_REATTACH;
     worker_id_ = worker_id;
-    if (!IsAttached())
-      return;
-    AttachToWorker();
-    Reattach(state_);
+    WorkerCreated();
+  }
+
+  void WorkerDestroyed() {
+    DCHECK_NE(state_, WORKER_TERMINATED);
+    if (state_ == WORKER_INSPECTED) {
+      DCHECK(IsAttached());
+      // Client host is debugging this worker agent host.
+      std::string notification =
+          DevToolsProtocol::CreateNotification(
+              devtools::Worker::disconnectedFromWorker::kName, NULL)
+              ->Serialize();
+      DevToolsManagerImpl::GetInstance()->DispatchOnInspectorFrontend(
+          this, notification);
+      DetachFromWorker();
+    }
+    state_ = WORKER_TERMINATED;
+    Release();  // Balanced in WorkerCreated()
+  }
+
+  bool Matches(const SharedWorkerInstance& other) {
+    return shared_worker_ && shared_worker_->Matches(other);
+  }
+
+  bool Matches(const ServiceWorkerIdentifier& other) {
+    return service_worker_ && service_worker_->Matches(other);
+  }
+
+ private:
+  virtual ~EmbeddedWorkerDevToolsAgentHost() {
+    CHECK_EQ(state_, WORKER_TERMINATED);

[dgozman, 2014/08/07 17:07:21]

DCHECK_EQ

+    EmbeddedWorkerDevToolsManager::GetInstance()->RemoveInspectedWorkerData(
+        worker_id_);
+  }
+
+  void AttachToWorker() {
+    if (RenderProcessHost* host = RenderProcessHost::FromID(worker_id_.first))
+      host->AddRoute(worker_id_.second, this);
   }
 
   void DetachFromWorker() {
-    if (!worker_attached_)
-      return;
-    worker_attached_ = false;
     if (RenderProcessHost* host = RenderProcessHost::FromID(worker_id_.first))
       host->RemoveRoute(worker_id_.second);
-    Release();
   }
 
-  WorkerId worker_id() const { return worker_id_; }
-
- private:
-  virtual ~EmbeddedWorkerDevToolsAgentHost() {
-    CHECK(!worker_attached_);
-    EmbeddedWorkerDevToolsManager::GetInstance()->RemoveInspectedWorkerData(
-        this);
+  void WorkerCreated() {
+    AddRef();  // Balanced in WorkerDestroyed()
   }
 
   void OnDispatchOnInspectorFrontend(const std::string& message) {
     DevToolsManagerImpl::GetInstance()->DispatchOnInspectorFrontend(this,
                                                                     message);
   }
 
-  void OnSaveAgentRuntimeState(const std::string& state) { state_ = state; }
-
-  void AttachToWorker() {
-    if (worker_attached_)
-      return;
-    worker_attached_ = true;
-    AddRef();
-    if (RenderProcessHost* host = RenderProcessHost::FromID(worker_id_.first))
-      host->AddRoute(worker_id_.second, this);
+  void OnSaveAgentRuntimeState(const std::string& state) {
+    saved_agent_state_ = state;
   }
 
+  scoped_ptr<SharedWorkerInstance> shared_worker_;
+  scoped_ptr<ServiceWorkerIdentifier> service_worker_;
+  WorkerState state_;
   WorkerId worker_id_;
-  bool worker_attached_;
-  std::string state_;
+  std::string saved_agent_state_;
   DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerDevToolsAgentHost);
 };
 
 // static
 EmbeddedWorkerDevToolsManager* EmbeddedWorkerDevToolsManager::GetInstance() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return Singleton<EmbeddedWorkerDevToolsManager>::get();
 }
 
 DevToolsAgentHost* EmbeddedWorkerDevToolsManager::GetDevToolsAgentHostForWorker(
     int worker_process_id,
     int worker_route_id) {
-  WorkerId id(worker_process_id, worker_route_id);
-
-  WorkerInfoMap::iterator it = workers_.find(id);
-  if (it == workers_.end())
-    return NULL;
-
-  WorkerInfo* info = it->second;
-  if (info->state() != WORKER_UNINSPECTED &&
-      info->state() != WORKER_PAUSED_FOR_DEBUG_ON_START) {
-    return info->agent_host();
-  }
-
-  EmbeddedWorkerDevToolsAgentHost* agent_host =
-      new EmbeddedWorkerDevToolsAgentHost(id);
-  info->set_agent_host(agent_host);
-  info->set_state(WORKER_INSPECTED);
-  return agent_host;
+  AgentHostMap::iterator it = workers_.find(
+      WorkerId(worker_process_id, worker_route_id));
+  return it == workers_.end() ? NULL : it->second;
 }
 
 DevToolsAgentHost*
 EmbeddedWorkerDevToolsManager::GetDevToolsAgentHostForServiceWorker(
     const ServiceWorkerIdentifier& service_worker_id) {
-  WorkerInfoMap::iterator it = FindExistingServiceWorkerInfo(service_worker_id);
+  AgentHostMap::iterator it =
+      FindExistingServiceWorkerAgentHost(service_worker_id);
   if (it == workers_.end())
     return NULL;
   return GetDevToolsAgentHostForWorker(it->first.first, it->first.second);
 }
 
 EmbeddedWorkerDevToolsManager::EmbeddedWorkerDevToolsManager()
     : debug_service_worker_on_start_(false) {
 }
 
 EmbeddedWorkerDevToolsManager::~EmbeddedWorkerDevToolsManager() {
 }
 
 bool EmbeddedWorkerDevToolsManager::SharedWorkerCreated(
     int worker_process_id,
     int worker_route_id,
     const SharedWorkerInstance& instance) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   const WorkerId id(worker_process_id, worker_route_id);
-  WorkerInfoMap::iterator it = FindExistingSharedWorkerInfo(instance);
+  AgentHostMap::iterator it = FindExistingSharedWorkerAgentHost(instance);
   if (it == workers_.end()) {
-    scoped_ptr<WorkerInfo> info(new WorkerInfo(instance));
-    workers_.set(id, info.Pass());
+    workers_[id] = new EmbeddedWorkerDevToolsAgentHost(id, instance);
     return false;
   }
-  MoveToPausedState(id, it);
+  WorkerRestarted(id, it);
   return true;
 }
 
 bool EmbeddedWorkerDevToolsManager::ServiceWorkerCreated(
     int worker_process_id,
     int worker_route_id,
     const ServiceWorkerIdentifier& service_worker_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   const WorkerId id(worker_process_id, worker_route_id);
-  WorkerInfoMap::iterator it = FindExistingServiceWorkerInfo(service_worker_id);
+  AgentHostMap::iterator it =
+      FindExistingServiceWorkerAgentHost(service_worker_id);
   if (it == workers_.end()) {
-    scoped_ptr<WorkerInfo> info(new WorkerInfo(service_worker_id));
-    if (debug_service_worker_on_start_)
-      info->set_state(WORKER_PAUSED_FOR_DEBUG_ON_START);
-    workers_.set(id, info.Pass());
+    workers_[id] = new EmbeddedWorkerDevToolsAgentHost(
+        id, service_worker_id, debug_service_worker_on_start_);
     return debug_service_worker_on_start_;
   }
-  MoveToPausedState(id, it);
+  WorkerRestarted(id, it);
   return true;
 }
 
 void EmbeddedWorkerDevToolsManager::WorkerDestroyed(int worker_process_id,
                                                     int worker_route_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   const WorkerId id(worker_process_id, worker_route_id);
-  WorkerInfoMap::iterator it = workers_.find(id);
+  AgentHostMap::iterator it = workers_.find(id);
   DCHECK(it != workers_.end());
-  WorkerInfo* info = it->second;
-  switch (info->state()) {
-    case WORKER_UNINSPECTED:
-    case WORKER_PAUSED_FOR_DEBUG_ON_START:
-      workers_.erase(it);
-      break;
-    case WORKER_INSPECTED: {
-      EmbeddedWorkerDevToolsAgentHost* agent_host = info->agent_host();
-      info->set_state(WORKER_TERMINATED);
-      if (!agent_host->IsAttached()) {
-        agent_host->DetachFromWorker();
-        return;
-      }
-      // Client host is debugging this worker agent host.
-      std::string notification =
-          DevToolsProtocol::CreateNotification(
-              devtools::Worker::disconnectedFromWorker::kName, NULL)
-              ->Serialize();
-      DevToolsManagerImpl::GetInstance()->DispatchOnInspectorFrontend(
-          agent_host, notification);
-      agent_host->DetachFromWorker();
-      break;
-    }
-    case WORKER_TERMINATED:
-      NOTREACHED();
-      break;
-    case WORKER_PAUSED_FOR_REATTACH: {
-      scoped_ptr<WorkerInfo> worker_info = workers_.take_and_erase(it);
-      worker_info->set_state(WORKER_TERMINATED);
-      const WorkerId old_id = worker_info->agent_host()->worker_id();
-      workers_.set(old_id, worker_info.Pass());
-      break;
-    }
-  }
+  it->second->WorkerDestroyed();
 }
 
 void EmbeddedWorkerDevToolsManager::WorkerContextStarted(int worker_process_id,
                                                          int worker_route_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   const WorkerId id(worker_process_id, worker_route_id);
-  WorkerInfoMap::iterator it = workers_.find(id);
+  AgentHostMap::iterator it = workers_.find(id);
   DCHECK(it != workers_.end());
-  WorkerInfo* info = it->second;
-  if (info->state() == WORKER_PAUSED_FOR_DEBUG_ON_START) {
-    RenderProcessHost* rph = RenderProcessHost::FromID(worker_process_id);
-    scoped_refptr<DevToolsAgentHost> agent_host(
-        GetDevToolsAgentHostForWorker(worker_process_id, worker_route_id));
-    DevToolsManagerImpl::GetInstance()->Inspect(rph->GetBrowserContext(),
-                                                agent_host.get());
-  } else if (info->state() == WORKER_PAUSED_FOR_REATTACH) {
-    info->agent_host()->ReattachToWorker(id);
-    info->set_state(WORKER_INSPECTED);
-  }
+  it->second->WorkerContextStarted();
 }
 
-void EmbeddedWorkerDevToolsManager::RemoveInspectedWorkerData(
-    EmbeddedWorkerDevToolsAgentHost* agent_host) {
+void EmbeddedWorkerDevToolsManager::RemoveInspectedWorkerData(WorkerId id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  const WorkerId id(agent_host->worker_id());
-  scoped_ptr<WorkerInfo> worker_info = workers_.take_and_erase(id);
-  if (worker_info) {
-    DCHECK_EQ(worker_info->agent_host(), agent_host);
-    if (worker_info->state() == WORKER_TERMINATED)
-      return;
-    DCHECK_EQ(worker_info->state(), WORKER_INSPECTED);
-    worker_info->set_agent_host(NULL);
-    worker_info->set_state(WORKER_UNINSPECTED);
-    workers_.set(id, worker_info.Pass());
-    return;
-  }
-  for (WorkerInfoMap::iterator it = workers_.begin(); it != workers_.end();
-       ++it) {
-    if (it->second->agent_host() == agent_host) {
-      DCHECK_EQ(WORKER_PAUSED_FOR_REATTACH, it->second->state());
-      SendMessageToWorker(
-          it->first,
-          new DevToolsAgentMsg_ResumeWorkerContext(it->first.second));
-      it->second->set_agent_host(NULL);
-      it->second->set_state(WORKER_UNINSPECTED);
-      return;
-    }
-  }
+  workers_.erase(id);
 }
 
-EmbeddedWorkerDevToolsManager::WorkerInfoMap::iterator
-EmbeddedWorkerDevToolsManager::FindExistingSharedWorkerInfo(
+EmbeddedWorkerDevToolsManager::AgentHostMap::iterator
+EmbeddedWorkerDevToolsManager::FindExistingSharedWorkerAgentHost(
     const SharedWorkerInstance& instance) {
-  WorkerInfoMap::iterator it = workers_.begin();
+  AgentHostMap::iterator it = workers_.begin();
   for (; it != workers_.end(); ++it) {
     if (it->second->Matches(instance))
       break;
   }
   return it;
 }
 
-EmbeddedWorkerDevToolsManager::WorkerInfoMap::iterator
-EmbeddedWorkerDevToolsManager::FindExistingServiceWorkerInfo(
+EmbeddedWorkerDevToolsManager::AgentHostMap::iterator
+EmbeddedWorkerDevToolsManager::FindExistingServiceWorkerAgentHost(
     const ServiceWorkerIdentifier& service_worker_id) {
-  WorkerInfoMap::iterator it = workers_.begin();
+  AgentHostMap::iterator it = workers_.begin();
   for (; it != workers_.end(); ++it) {
     if (it->second->Matches(service_worker_id))
       break;
   }
   return it;
 }
 
-void EmbeddedWorkerDevToolsManager::MoveToPausedState(
+void EmbeddedWorkerDevToolsManager::WorkerRestarted(
     const WorkerId& id,
-    const WorkerInfoMap::iterator& it) {
-  DCHECK_EQ(WORKER_TERMINATED, it->second->state());
-  scoped_ptr<WorkerInfo> info = workers_.take_and_erase(it);
-  info->set_state(WORKER_PAUSED_FOR_REATTACH);
-  workers_.set(id, info.Pass());
+    const AgentHostMap::iterator& it) {
+  EmbeddedWorkerDevToolsAgentHost* agent_host = it->second;
+  agent_host->WorkerRestarted(id);
+  workers_.erase(it);
+  workers_[id] = agent_host;
 }
 
 void EmbeddedWorkerDevToolsManager::ResetForTesting() {
   workers_.clear();
 }
 
 }  // namespace content