Create an API around WorkerService that chrome consumes. Rename the existing WorkerService to Wor...

content/browser/worker_host/worker_service_impl.cc

 // Copyright (c) 2011 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/worker_host/worker_service.h"
+#include "content/browser/worker_host/worker_service_impl.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/sys_info.h"
 #include "base/threading/thread.h"
 #include "content/browser/resource_context.h"
 #include "content/browser/worker_host/worker_message_filter.h"
 #include "content/browser/worker_host/worker_process_host.h"
-#include "content/browser/worker_host/worker_service_observer.h"
 #include "content/common/view_messages.h"
 #include "content/common/worker_messages.h"
+#include "content/public/browser/worker_service_observer.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/process_type.h"
 #include "net/base/registry_controlled_domain.h"
 
-using content::BrowserThread;
+namespace content {
 
-const int WorkerService::kMaxWorkerProcessesWhenSharing = 10;
-const int WorkerService::kMaxWorkersWhenSeparate = 64;
-const int WorkerService::kMaxWorkersPerTabWhenSeparate = 16;
+const int WorkerServiceImpl::kMaxWorkerProcessesWhenSharing = 10;
+const int WorkerServiceImpl::kMaxWorkersWhenSeparate = 64;
+const int WorkerServiceImpl::kMaxWorkersPerTabWhenSeparate = 16;
 
 WorkerService* WorkerService::GetInstance() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  return Singleton<WorkerService>::get();
+  return WorkerServiceImpl::GetInstance();
 }
 
-WorkerService::WorkerService() : next_worker_route_id_(0) {
+WorkerServiceImpl* WorkerServiceImpl::GetInstance() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  return Singleton<WorkerServiceImpl>::get();
 }
 
-WorkerService::~WorkerService() {
+WorkerServiceImpl::WorkerServiceImpl() : next_worker_route_id_(0) {
+}
+
+WorkerServiceImpl::~WorkerServiceImpl() {
   // The observers in observers_ can't be used here because they might be
   // gone already.
 }
 
-void WorkerService::OnWorkerMessageFilterClosing(WorkerMessageFilter* filter) {
+void WorkerServiceImpl::OnWorkerMessageFilterClosing(
+    WorkerMessageFilter* filter) {
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
      !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     worker->FilterShutdown(filter);
   }
 
   // See if that process had any queued workers.
   for (WorkerProcessHost::Instances::iterator i = queued_workers_.begin();
        i != queued_workers_.end();) {
     i->RemoveFilters(filter);
@@ skipping 16 matching lines @@
     }
   }
 
   // Either a worker proceess has shut down, in which case we can start one of
   // the queued workers, or a renderer has shut down, in which case it doesn't
   // affect anything.  We call this function in both scenarios because then we
   // don't have to keep track which filters are from worker processes.
   TryStartingQueuedWorker();
 }
 
-void WorkerService::CreateWorker(
+void WorkerServiceImpl::CreateWorker(
     const ViewHostMsg_CreateWorker_Params& params,
     int route_id,
     WorkerMessageFilter* filter,
     const content::ResourceContext& resource_context) {
   // Generate a unique route id for the browser-worker communication that's
   // unique among all worker processes.  That way when the worker process sends
   // a wrapped IPC message through us, we know which WorkerProcessHost to give
   // it to.
   WorkerProcessHost::WorkerInstance instance(
       params.url,
       params.name,
       next_worker_route_id(),
       0,
       params.script_resource_appcache_id,
       &resource_context);
   instance.AddFilter(filter, route_id);
   instance.worker_document_set()->Add(
       filter, params.document_id, filter->render_process_id(),
       params.render_view_route_id);
 
   CreateWorkerFromInstance(instance);
 }
 
-void WorkerService::LookupSharedWorker(
+void WorkerServiceImpl::LookupSharedWorker(
     const ViewHostMsg_CreateWorker_Params& params,
     int route_id,
     WorkerMessageFilter* filter,
     const content::ResourceContext* resource_context,
     bool* exists,
     bool* url_mismatch) {
   *exists = true;
   WorkerProcessHost::WorkerInstance* instance = FindSharedWorkerInstance(
       params.url, params.name, resource_context);
 
@@ skipping 21 matching lines @@
     // TODO(atwilson): This won't work if the message is from a worker process.
     // We don't support that yet though (this message is only sent from
     // renderers) but when we do, we'll need to add code to pass in the current
     // worker's document set for nested workers.
     instance->worker_document_set()->Add(
         filter, params.document_id, filter->render_process_id(),
         params.render_view_route_id);
   }
 }
 
-void WorkerService::CancelCreateDedicatedWorker(
+void WorkerServiceImpl::CancelCreateDedicatedWorker(
     int route_id,
     WorkerMessageFilter* filter) {
 
   NOTREACHED();
 }
 
-void WorkerService::ForwardToWorker(const IPC::Message& message,
-                                    WorkerMessageFilter* filter) {
+void WorkerServiceImpl::ForwardToWorker(const IPC::Message& message,
+                                        WorkerMessageFilter* filter) {
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     if (worker->FilterMessage(message, filter))
       return;
   }
 
   // TODO(jabdelmalek): tell filter that callee is gone
 }
 
-void WorkerService::DocumentDetached(unsigned long long document_id,
-                                     WorkerMessageFilter* filter) {
+void WorkerServiceImpl::DocumentDetached(unsigned long long document_id,
+                                         WorkerMessageFilter* filter) {
   // Any associated shared workers can be shut down.
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     worker->DocumentDetached(filter, document_id);
   }
 
   // Remove any queued shared workers for this document.
   for (WorkerProcessHost::Instances::iterator iter = queued_workers_.begin();
        iter != queued_workers_.end();) {
@@ skipping 12 matching lines @@
        iter != pending_shared_workers_.end(); ) {
     iter->worker_document_set()->Remove(filter, document_id);
     if (iter->worker_document_set()->IsEmpty()) {
       iter = pending_shared_workers_.erase(iter);
     } else {
       ++iter;
     }
   }
 }
 
-bool WorkerService::CreateWorkerFromInstance(
+bool WorkerServiceImpl::CreateWorkerFromInstance(
     WorkerProcessHost::WorkerInstance instance) {
   // TODO(michaeln): We need to ensure that a process is working
   // on behalf of a single browser context. The process sharing logic below
   // does not ensure that. Consider making WorkerService a per browser context
   // object to help with this.
   WorkerProcessHost* worker = NULL;
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kWebWorkerProcessPerCore)) {
     worker = GetProcessToFillUpCores();
   } else if (CommandLine::ForCurrentProcess()->HasSwitch(
@@ skipping 86 matching lines @@
   // TODO(michaeln): As written, test can fail per my earlier comment in
   // this method, but that's a bug.
   // DCHECK(worker->request_context() == instance.request_context());
 
   worker->CreateWorker(instance);
   FOR_EACH_OBSERVER(WorkerServiceObserver, observers_,
                     WorkerCreated(worker, instance));
   return true;
 }
 
-WorkerProcessHost* WorkerService::GetProcessForDomain(const GURL& url) {
+WorkerProcessHost* WorkerServiceImpl::GetProcessForDomain(const GURL& url) {
   int num_processes = 0;
   std::string domain =
       net::RegistryControlledDomainService::GetDomainAndRegistry(url);
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     num_processes++;
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     for (WorkerProcessHost::Instances::const_iterator instance =
              worker->instances().begin();
          instance != worker->instances().end(); ++instance) {
       if (net::RegistryControlledDomainService::GetDomainAndRegistry(
               instance->url()) == domain) {
         return worker;
       }
     }
   }
 
   if (num_processes >= kMaxWorkerProcessesWhenSharing)
     return GetLeastLoadedWorker();
 
   return NULL;
 }
 
-WorkerProcessHost* WorkerService::GetProcessToFillUpCores() {
+WorkerProcessHost* WorkerServiceImpl::GetProcessToFillUpCores() {
   int num_processes = 0;
   BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
   for (; !iter.Done(); ++iter)
     num_processes++;
 
   if (num_processes >= base::SysInfo::NumberOfProcessors())
     return GetLeastLoadedWorker();
 
   return NULL;
 }
 
-WorkerProcessHost* WorkerService::GetLeastLoadedWorker() {
+WorkerProcessHost* WorkerServiceImpl::GetLeastLoadedWorker() {
   WorkerProcessHost* smallest = NULL;
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     if (!smallest || worker->instances().size() < smallest->instances().size())
       smallest = worker;
   }
 
   return smallest;
 }
 
-bool WorkerService::CanCreateWorkerProcess(
+bool WorkerServiceImpl::CanCreateWorkerProcess(
     const WorkerProcessHost::WorkerInstance& instance) {
   // Worker can be fired off if *any* parent has room.
   const WorkerDocumentSet::DocumentInfoSet& parents =
         instance.worker_document_set()->documents();
 
   for (WorkerDocumentSet::DocumentInfoSet::const_iterator parent_iter =
            parents.begin();
        parent_iter != parents.end(); ++parent_iter) {
     bool hit_total_worker_limit = false;
     if (TabCanCreateWorkerProcess(parent_iter->render_process_id(),
                                   parent_iter->render_view_id(),
                                   &hit_total_worker_limit)) {
       return true;
     }
     // Return false if already at the global worker limit (no need to continue
     // checking parent tabs).
     if (hit_total_worker_limit)
       return false;
   }
   // If we've reached here, none of the parent tabs is allowed to create an
   // instance.
   return false;
 }
 
-bool WorkerService::TabCanCreateWorkerProcess(int render_process_id,
-                                              int render_view_id,
-                                              bool* hit_total_worker_limit) {
+bool WorkerServiceImpl::TabCanCreateWorkerProcess(
+    int render_process_id,
+    int render_view_id,
+    bool* hit_total_worker_limit) {
   int total_workers = 0;
   int workers_per_tab = 0;
   *hit_total_worker_limit = false;
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     for (WorkerProcessHost::Instances::const_iterator cur_instance =
              worker->instances().begin();
          cur_instance != worker->instances().end(); ++cur_instance) {
       total_workers++;
       if (total_workers >= kMaxWorkersWhenSeparate) {
         *hit_total_worker_limit = true;
         return false;
       }
       if (cur_instance->RendererIsParent(render_process_id, render_view_id)) {
         workers_per_tab++;
         if (workers_per_tab >= kMaxWorkersPerTabWhenSeparate)
           return false;
       }
     }
   }
 
   return true;
 }
 
-void WorkerService::TryStartingQueuedWorker() {
+void WorkerServiceImpl::TryStartingQueuedWorker() {
   if (queued_workers_.empty())
     return;
 
   for (WorkerProcessHost::Instances::iterator i = queued_workers_.begin();
        i != queued_workers_.end();) {
     if (CanCreateWorkerProcess(*i)) {
       WorkerProcessHost::WorkerInstance instance = *i;
       queued_workers_.erase(i);
       CreateWorkerFromInstance(instance);
 
       // CreateWorkerFromInstance can modify the queued_workers_ list when it
       // coalesces queued instances after starting a shared worker, so we
       // have to rescan the list from the beginning (our iterator is now
       // invalid). This is not a big deal as having any queued workers will be
       // rare in practice so the list will be small.
       i = queued_workers_.begin();
     } else {
       ++i;
     }
   }
 }
 
-bool WorkerService::GetRendererForWorker(int worker_process_id,
-                                         int* render_process_id,
-                                         int* render_view_id) const {
+bool WorkerServiceImpl::GetRendererForWorker(int worker_process_id,
+                                             int* render_process_id,
+                                             int* render_view_id) const {
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     if (iter->id() != worker_process_id)
         continue;
 
     // This code assumes one worker per process, see function comment in header!
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     WorkerProcessHost::Instances::const_iterator first_instance =
         worker->instances().begin();
     if (first_instance == worker->instances().end())
       return false;
 
     WorkerDocumentSet::DocumentInfoSet::const_iterator info =
         first_instance->worker_document_set()->documents().begin();
     *render_process_id = info->render_process_id();
     *render_view_id = info->render_view_id();
     return true;
   }
   return false;
 }
 
-const WorkerProcessHost::WorkerInstance* WorkerService::FindWorkerInstance(
+const WorkerProcessHost::WorkerInstance* WorkerServiceImpl::FindWorkerInstance(
       int worker_process_id) {
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     if (iter->id() != worker_process_id)
         continue;
 
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     WorkerProcessHost::Instances::const_iterator instance =
         worker->instances().begin();
     return instance == worker->instances().end() ? NULL : &*instance;
   }
   return NULL;
 }
 
-void WorkerService::AddObserver(WorkerServiceObserver* observer) {
+void WorkerServiceImpl::AddObserver(WorkerServiceObserver* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   observers_.AddObserver(observer);
 }
 
-void WorkerService::RemoveObserver(WorkerServiceObserver* observer) {
+void WorkerServiceImpl::RemoveObserver(WorkerServiceObserver* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   observers_.RemoveObserver(observer);
 }
 
-void WorkerService::NotifyWorkerDestroyed(
+void WorkerServiceImpl::NotifyWorkerDestroyed(
     WorkerProcessHost* process,
     int worker_route_id) {
   FOR_EACH_OBSERVER(WorkerServiceObserver, observers_,
                     WorkerDestroyed(process, worker_route_id));
 }
 
-void WorkerService::NotifyWorkerContextStarted(WorkerProcessHost* process,
-                                               int worker_route_id) {
+void WorkerServiceImpl::NotifyWorkerContextStarted(WorkerProcessHost* process,
+                                                   int worker_route_id) {
   FOR_EACH_OBSERVER(WorkerServiceObserver, observers_,
                     WorkerContextStarted(process, worker_route_id));
 }
 
-WorkerProcessHost::WorkerInstance*
-WorkerService::FindSharedWorkerInstance(
+WorkerProcessHost::WorkerInstance* WorkerServiceImpl::FindSharedWorkerInstance(
     const GURL& url,
     const string16& name,
     const content::ResourceContext* resource_context) {
   for (BrowserChildProcessHost::Iterator iter(content::PROCESS_TYPE_WORKER);
        !iter.Done(); ++iter) {
     WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
     for (WorkerProcessHost::Instances::iterator instance_iter =
              worker->mutable_instances().begin();
          instance_iter != worker->mutable_instances().end();
          ++instance_iter) {
       if (instance_iter->Matches(url, name, resource_context))
         return &(*instance_iter);
     }
   }
   return NULL;
 }
 
-WorkerProcessHost::WorkerInstance*
-WorkerService::FindPendingInstance(
+WorkerProcessHost::WorkerInstance* WorkerServiceImpl::FindPendingInstance(
     const GURL& url,
     const string16& name,
     const content::ResourceContext* resource_context) {
   // Walk the pending instances looking for a matching pending worker.
   for (WorkerProcessHost::Instances::iterator iter =
            pending_shared_workers_.begin();
        iter != pending_shared_workers_.end();
        ++iter) {
     if (iter->Matches(url, name, resource_context)) {
       return &(*iter);
     }
   }
   return NULL;
 }
 
 
-void WorkerService::RemovePendingInstances(
+void WorkerServiceImpl::RemovePendingInstances(
     const GURL& url,
     const string16& name,
     const content::ResourceContext* resource_context) {
   // Walk the pending instances looking for a matching pending worker.
   for (WorkerProcessHost::Instances::iterator iter =
            pending_shared_workers_.begin();
        iter != pending_shared_workers_.end(); ) {
     if (iter->Matches(url, name, resource_context)) {
       iter = pending_shared_workers_.erase(iter);
     } else {
       ++iter;
     }
   }
 }
 
-WorkerProcessHost::WorkerInstance*
-WorkerService::CreatePendingInstance(
+WorkerProcessHost::WorkerInstance* WorkerServiceImpl::CreatePendingInstance(
     const GURL& url,
     const string16& name,
     const content::ResourceContext* resource_context) {
   // Look for an existing pending shared worker.
   WorkerProcessHost::WorkerInstance* instance =
       FindPendingInstance(url, name, resource_context);
   if (instance)
     return instance;
 
   // No existing pending worker - create a new one.
   WorkerProcessHost::WorkerInstance pending(url, true, name, resource_context);
   pending_shared_workers_.push_back(pending);
   return &pending_shared_workers_.back();
 }
+
+}  // namespace content