net/proxy/mojo_proxy_resolver_v8_tracing_bindings.h

   1 // Copyright 2015 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 #ifndef NET_PROXY_MOJO_PROXY_RESOLVER_V8_TRACING_BINDINGS_H_
   6 #define NET_PROXY_MOJO_PROXY_RESOLVER_V8_TRACING_BINDINGS_H_
   7
   8 #include "base/threading/thread_checker.h"
   9 #include "mojo/common/common_type_converters.h"
  10 #include "net/dns/host_resolver_mojo.h"
  11 #include "net/interfaces/proxy_resolver_service.mojom.h"
  12 #include "net/proxy/proxy_resolver_v8_tracing.h"
  13
  14 namespace net {
  15
  16 // An implementation of ProxyResolverV8Tracing::Bindings that forwards requests
  17 // onto a Client mojo interface. Alert() and OnError() may be called from any
  18 // thread; when they are called from another thread, the calls are proxied to
  19 // the origin task runner. GetHostResolver() and GetBoundNetLog() may only be
  20 // called from the origin task runner.
  21 template <typename Client>
  22 class MojoProxyResolverV8TracingBindings
  23     : public ProxyResolverV8Tracing::Bindings,
  24       public HostResolverMojo::Impl {
  25  public:
  26   explicit MojoProxyResolverV8TracingBindings(Client* client)
  27       : client_(client), host_resolver_(this) {
  28     DCHECK(client_);
  29   }
  30
  31   // ProxyResolverV8Tracing::Bindings overrides.
  32   void Alert(const base::string16& message) override {
  33     DCHECK(thread_checker_.CalledOnValidThread());
  34     client_->Alert(mojo::String::From(message));
  35   }
  36
  37   void OnError(int line_number, const base::string16& message) override {
  38     DCHECK(thread_checker_.CalledOnValidThread());
  39     client_->OnError(line_number, mojo::String::From(message));
  40   }
  41
  42   HostResolver* GetHostResolver() override {
  43     DCHECK(thread_checker_.CalledOnValidThread());
  44     return &host_resolver_;
  45   }
  46
  47   BoundNetLog GetBoundNetLog() override {
  48     DCHECK(thread_checker_.CalledOnValidThread());
  49     return BoundNetLog();
  50   }
  51
  52  private:
  53   // HostResolverMojo::Impl override.
  54   void ResolveDns(interfaces::HostResolverRequestInfoPtr request_info,
  55                   interfaces::HostResolverRequestClientPtr client) {
  56     DCHECK(thread_checker_.CalledOnValidThread());
  57     client_->ResolveDns(request_info.Pass(), client.Pass());
  58   }
  59
  60   base::ThreadChecker thread_checker_;
  61   Client* client_;
  62   HostResolverMojo host_resolver_;
  63 };
  64
  65 }  // namespace net
  66
  67 #endif  // NET_PROXY_MOJO_PROXY_RESOLVER_V8_TRACING_BINDINGS_H_