content/common/message_router.cc

   1 // Copyright (c) 2011 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/common/message_router.h"
   6
   7 #include "ipc/ipc_message.h"
   8
   9 namespace content {
  10
  11 MessageRouter::MessageRouter() {
  12 }
  13
  14 MessageRouter::~MessageRouter() {
  15 }
  16
  17 bool MessageRouter::OnControlMessageReceived(const IPC::Message& msg) {
  18   NOTREACHED() <<
  19       "should override in subclass if you care about control messages";
  20   return false;
  21 }
  22
  23 bool MessageRouter::Send(IPC::Message* msg) {
  24   NOTREACHED() <<
  25       "should override in subclass if you care about sending messages";
  26   return false;
  27 }
  28
  29 bool MessageRouter::AddRoute(int32 routing_id, IPC::Listener* listener) {
  30   if (routes_.Lookup(routing_id)) {
  31     DLOG(ERROR) << "duplicate routing ID";
  32     return false;
  33   }
  34   routes_.AddWithID(listener, routing_id);
  35   return true;
  36 }
  37
  38 void MessageRouter::RemoveRoute(int32 routing_id) {
  39   routes_.Remove(routing_id);
  40 }
  41
  42 bool MessageRouter::OnMessageReceived(const IPC::Message& msg) {
  43   if (msg.routing_id() == MSG_ROUTING_CONTROL)
  44     return OnControlMessageReceived(msg);
  45
  46   return RouteMessage(msg);
  47 }
  48
  49 bool MessageRouter::RouteMessage(const IPC::Message& msg) {
  50   IPC::Listener* listener = routes_.Lookup(msg.routing_id());
  51   if (!listener)
  52     return false;
  53
  54   listener->OnMessageReceived(msg);
  55   return true;
  56 }
  57
  58 }  // namespace content