net/dns/host_resolver_mojo.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_DNS_HOST_RESOLVER_MOJO_H_
   6 #define NET_DNS_HOST_RESOLVER_MOJO_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/threading/thread_checker.h"
  10 #include "net/dns/host_cache.h"
  11 #include "net/dns/host_resolver.h"
  12 #include "net/interfaces/host_resolver_service.mojom.h"
  13
  14 namespace net {
  15 class AddressList;
  16 class BoundNetLog;
  17
  18 // A HostResolver implementation that converts requests to mojo types and
  19 // forwards them to a mojo Impl interface.
  20 class HostResolverMojo : public HostResolver {
  21  public:
  22   class Impl {
  23    public:
  24     virtual ~Impl() = default;
  25     virtual void ResolveDns(interfaces::HostResolverRequestInfoPtr,
  26                             interfaces::HostResolverRequestClientPtr) = 0;
  27   };
  28
  29   // |impl| must outlive |this|.
  30   explicit HostResolverMojo(Impl* impl);
  31   ~HostResolverMojo() override;
  32
  33   // HostResolver overrides.
  34   int Resolve(const RequestInfo& info,
  35               RequestPriority priority,
  36               AddressList* addresses,
  37               const CompletionCallback& callback,
  38               RequestHandle* request_handle,
  39               const BoundNetLog& source_net_log) override;
  40   int ResolveFromCache(const RequestInfo& info,
  41                        AddressList* addresses,
  42                        const BoundNetLog& source_net_log) override;
  43   void CancelRequest(RequestHandle req) override;
  44   HostCache* GetHostCache() override;
  45
  46  private:
  47   class Job;
  48
  49   int ResolveFromCacheInternal(const RequestInfo& info,
  50                                const HostCache::Key& key,
  51                                AddressList* addresses);
  52
  53   Impl* const impl_;
  54
  55   scoped_ptr<HostCache> host_cache_;
  56   base::WeakPtrFactory<HostCache> host_cache_weak_factory_;
  57
  58   base::ThreadChecker thread_checker_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(HostResolverMojo);
  61 };
  62
  63 }  // namespace net
  64
  65 #endif  // NET_DNS_HOST_RESOLVER_MOJO_H_