content/renderer/service_worker/embedded_worker_dispatcher.cc

   1 // Copyright 2013 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/renderer/service_worker/embedded_worker_dispatcher.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/metrics/histogram_macros.h"
   9 #include "base/strings/string16.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "content/child/child_process.h"
  12 #include "content/child/scoped_child_process_reference.h"
  13 #include "content/child/thread_safe_sender.h"
  14 #include "content/child/worker_task_runner.h"
  15 #include "content/common/devtools_messages.h"
  16 #include "content/common/service_worker/embedded_worker_messages.h"
  17 #include "content/public/common/content_client.h"
  18 #include "content/renderer/render_thread_impl.h"
  19 #include "content/renderer/service_worker/embedded_worker_devtools_agent.h"
  20 #include "content/renderer/service_worker/service_worker_context_client.h"
  21 #include "third_party/WebKit/public/platform/WebString.h"
  22 #include "third_party/WebKit/public/platform/WebURL.h"
  23 #include "third_party/WebKit/public/web/WebEmbeddedWorker.h"
  24 #include "third_party/WebKit/public/web/WebEmbeddedWorkerStartData.h"
  25
  26 namespace content {
  27
  28 // A thin wrapper of WebEmbeddedWorker which also adds and releases process
  29 // references automatically.
  30 class EmbeddedWorkerDispatcher::WorkerWrapper {
  31  public:
  32   WorkerWrapper(blink::WebEmbeddedWorker* worker, int devtools_agent_route_id)
  33       : worker_(worker),
  34         dev_tools_agent_(
  35             new EmbeddedWorkerDevToolsAgent(worker, devtools_agent_route_id)) {}
  36   ~WorkerWrapper() {}
  37
  38   blink::WebEmbeddedWorker* worker() { return worker_.get(); }
  39
  40  private:
  41   ScopedChildProcessReference process_ref_;
  42   scoped_ptr<blink::WebEmbeddedWorker> worker_;
  43   scoped_ptr<EmbeddedWorkerDevToolsAgent> dev_tools_agent_;
  44 };
  45
  46 EmbeddedWorkerDispatcher::EmbeddedWorkerDispatcher() : weak_factory_(this) {}
  47
  48 EmbeddedWorkerDispatcher::~EmbeddedWorkerDispatcher() {}
  49
  50 bool EmbeddedWorkerDispatcher::OnMessageReceived(
  51     const IPC::Message& message) {
  52   bool handled = true;
  53   IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerDispatcher, message)
  54     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StartWorker, OnStartWorker)
  55     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StopWorker, OnStopWorker)
  56     IPC_MESSAGE_UNHANDLED(handled = false)
  57   IPC_END_MESSAGE_MAP()
  58   return handled;
  59 }
  60
  61 void EmbeddedWorkerDispatcher::WorkerContextDestroyed(
  62     int embedded_worker_id) {
  63   if (ContainsKey(stop_worker_times_, embedded_worker_id)) {
  64     base::TimeTicks stop_time = stop_worker_times_[embedded_worker_id];
  65     UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.TerminateThread.Time",
  66                                base::TimeTicks::Now() - stop_time);
  67     stop_worker_times_.erase(embedded_worker_id);
  68   }
  69
  70   RenderThreadImpl::current()->thread_safe_sender()->Send(
  71       new EmbeddedWorkerHostMsg_WorkerStopped(embedded_worker_id));
  72   workers_.Remove(embedded_worker_id);
  73 }
  74
  75 void EmbeddedWorkerDispatcher::OnStartWorker(
  76     const EmbeddedWorkerMsg_StartWorker_Params& params) {
  77   DCHECK(!workers_.Lookup(params.embedded_worker_id));
  78   TRACE_EVENT0("ServiceWorker", "EmbeddedWorkerDispatcher::OnStartWorker");
  79   RenderThread::Get()->EnsureWebKitInitialized();
  80   scoped_ptr<WorkerWrapper> wrapper(
  81       new WorkerWrapper(blink::WebEmbeddedWorker::create(
  82                             new ServiceWorkerContextClient(
  83                                 params.embedded_worker_id,
  84                                 params.service_worker_version_id,
  85                                 params.scope,
  86                                 params.script_url,
  87                                 params.worker_devtools_agent_route_id),
  88                             NULL),
  89                         params.worker_devtools_agent_route_id));
  90
  91   blink::WebEmbeddedWorkerStartData start_data;
  92   start_data.scriptURL = params.script_url;
  93   start_data.userAgent = base::UTF8ToUTF16(GetContentClient()->GetUserAgent());
  94   start_data.waitForDebuggerMode =
  95       params.wait_for_debugger ?
  96           blink::WebEmbeddedWorkerStartData::WaitForDebugger :
  97           blink::WebEmbeddedWorkerStartData::DontWaitForDebugger;
  98   start_data.v8CacheOptions =
  99       static_cast<blink::WebSettings::V8CacheOptions>(params.v8_cache_options);
 100
 101   wrapper->worker()->startWorkerContext(start_data);
 102   workers_.AddWithID(wrapper.release(), params.embedded_worker_id);
 103 }
 104
 105 void EmbeddedWorkerDispatcher::OnStopWorker(int embedded_worker_id) {
 106   TRACE_EVENT0("ServiceWorker", "EmbeddedWorkerDispatcher::OnStopWorker");
 107   WorkerWrapper* wrapper = workers_.Lookup(embedded_worker_id);
 108   if (!wrapper) {
 109     LOG(WARNING) << "Got OnStopWorker for nonexistent worker";
 110     return;
 111   }
 112
 113   // This should eventually call WorkerContextDestroyed. (We may need to post
 114   // a delayed task to forcibly abort the worker context if we find it
 115   // necessary)
 116   stop_worker_times_[embedded_worker_id] = base::TimeTicks::Now();
 117   wrapper->worker()->terminateWorkerContext();
 118 }
 119
 120 }  // namespace content