content/worker/worker_thread.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/worker/worker_thread.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/threading/thread_local.h"
  10 #include "content/child/appcache_dispatcher.h"
  11 #include "content/child/indexed_db/indexed_db_message_filter.h"
  12 #include "content/child/runtime_features.h"
  13 #include "content/child/web_database_observer_impl.h"
  14 #include "content/common/db_message_filter.h"
  15 #include "content/common/worker_messages.h"
  16 #include "content/public/common/content_switches.h"
  17 #include "content/worker/websharedworker_stub.h"
  18 #include "content/worker/worker_webkitplatformsupport_impl.h"
  19 #include "ipc/ipc_sync_channel.h"
  20 #include "third_party/WebKit/public/web/WebDatabase.h"
  21 #include "third_party/WebKit/public/web/WebKit.h"
  22 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  23 #include "third_party/WebKit/public/platform/WebBlobRegistry.h"
  24 #include "webkit/glue/webkit_glue.h"
  25 #include "webkit/renderer/appcache/appcache_frontend_impl.h"
  26
  27 using WebKit::WebRuntimeFeatures;
  28
  29 namespace content {
  30
  31 static base::LazyInstance<base::ThreadLocalPointer<WorkerThread> > lazy_tls =
  32     LAZY_INSTANCE_INITIALIZER;
  33
  34 WorkerThread::WorkerThread() {
  35   lazy_tls.Pointer()->Set(this);
  36   webkit_platform_support_.reset(new WorkerWebKitPlatformSupportImpl(
  37       thread_safe_sender(), sync_message_filter()));
  38   WebKit::initialize(webkit_platform_support_.get());
  39
  40   appcache_dispatcher_.reset(
  41       new AppCacheDispatcher(this, new appcache::AppCacheFrontendImpl()));
  42
  43   web_database_observer_impl_.reset(
  44       new WebDatabaseObserverImpl(sync_message_filter()));
  45   WebKit::WebDatabase::setObserver(web_database_observer_impl_.get());
  46   db_message_filter_ = new DBMessageFilter();
  47   channel()->AddFilter(db_message_filter_.get());
  48
  49   indexed_db_message_filter_ = new IndexedDBMessageFilter(
  50       thread_safe_sender());
  51   channel()->AddFilter(indexed_db_message_filter_.get());
  52
  53   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  54   SetRuntimeFeaturesDefaultsAndUpdateFromArgs(command_line);
  55 }
  56
  57 WorkerThread::~WorkerThread() {
  58 }
  59
  60 void WorkerThread::Shutdown() {
  61   // Shutdown in reverse of the initialization order.
  62   channel()->RemoveFilter(indexed_db_message_filter_.get());
  63   indexed_db_message_filter_ = NULL;
  64
  65   channel()->RemoveFilter(db_message_filter_.get());
  66   db_message_filter_ = NULL;
  67
  68   WebKit::shutdown();
  69   lazy_tls.Pointer()->Set(NULL);
  70 }
  71
  72 WorkerThread* WorkerThread::current() {
  73   return lazy_tls.Pointer()->Get();
  74 }
  75
  76 bool WorkerThread::OnControlMessageReceived(const IPC::Message& msg) {
  77   // Appcache messages are handled by a delegate.
  78   if (appcache_dispatcher_->OnMessageReceived(msg))
  79     return true;
  80
  81   bool handled = true;
  82   IPC_BEGIN_MESSAGE_MAP(WorkerThread, msg)
  83     IPC_MESSAGE_HANDLER(WorkerProcessMsg_CreateWorker, OnCreateWorker)
  84     IPC_MESSAGE_UNHANDLED(handled = false)
  85   IPC_END_MESSAGE_MAP()
  86   return handled;
  87 }
  88
  89 void WorkerThread::OnCreateWorker(
  90     const WorkerProcessMsg_CreateWorker_Params& params) {
  91   WorkerAppCacheInitInfo appcache_init_info(
  92       params.creator_process_id,
  93       params.shared_worker_appcache_id);
  94
  95   // WebSharedWorkerStub own themselves.
  96   new WebSharedWorkerStub(params.name, params.route_id, appcache_init_info);
  97 }
  98
  99 // The browser process is likely dead. Terminate all workers.
 100 void WorkerThread::OnChannelError() {
 101   set_on_channel_error_called(true);
 102
 103   for (WorkerStubsList::iterator it = worker_stubs_.begin();
 104        it != worker_stubs_.end(); ++it) {
 105     (*it)->OnChannelError();
 106   }
 107 }
 108
 109 void WorkerThread::RemoveWorkerStub(WebSharedWorkerStub* stub) {
 110   worker_stubs_.erase(stub);
 111 }
 112
 113 void WorkerThread::AddWorkerStub(WebSharedWorkerStub* stub) {
 114   worker_stubs_.insert(stub);
 115 }
 116
 117 }  // namespace content