This converts the Shill clients to allow propagation of shill errors

chromeos/dbus/shill_client_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/dbus/shill_client_helper.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "dbus/message.h"
 #include "dbus/object_proxy.h"
 #include "dbus/values_util.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
+namespace {
+
+const char kInvalidResponseErrorName[] = "";  // No error name.
+const char kInvalidResponseErrorMessage[] = "Invalid response.";
+
+}  // namespace
+
 ShillClientHelper::ShillClientHelper(dbus::Bus* bus,
                                            dbus::ObjectProxy* proxy)
     : blocking_method_caller_(bus, proxy),
       proxy_(proxy),
       weak_ptr_factory_(this) {
 }
 
 ShillClientHelper::~ShillClientHelper() {
 }
 
@@ skipping 29 matching lines @@
 
 void ShillClientHelper::CallObjectPathMethod(
     dbus::MethodCall* method_call,
     const ObjectPathDBusMethodCallback& callback) {
   proxy_->CallMethod(method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
                      base::Bind(&ShillClientHelper::OnObjectPathMethod,
                                 weak_ptr_factory_.GetWeakPtr(),
                                 callback));
 }
 
+void ShillClientHelper::CallObjectPathMethodWithErrorCallback(
+    dbus::MethodCall* method_call,
+    const ObjectPathCallback& callback,
+    const ErrorCallback& error_callback) {
+  proxy_->CallMethodWithErrorCallback(
+      method_call,
+      dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+      base::Bind(&ShillClientHelper::OnObjectPathMethodWithoutStatus,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 callback,
+                 error_callback),
+      base::Bind(&ShillClientHelper::OnError,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 error_callback));
+}
+
 void ShillClientHelper::CallDictionaryValueMethod(
     dbus::MethodCall* method_call,
     const DictionaryValueCallback& callback) {
   proxy_->CallMethod(method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
                      base::Bind(&ShillClientHelper::OnDictionaryValueMethod,
                                 weak_ptr_factory_.GetWeakPtr(),
                                 callback));
 }
 
 void ShillClientHelper::CallVoidMethodWithErrorCallback(
@@ skipping 148 matching lines @@
   }
   dbus::MessageReader reader(response);
   dbus::ObjectPath result;
   if (!reader.PopObjectPath(&result)) {
     callback.Run(DBUS_METHOD_CALL_FAILURE, dbus::ObjectPath());
     return;
   }
   callback.Run(DBUS_METHOD_CALL_SUCCESS, result);
 }
 
+void ShillClientHelper::OnObjectPathMethodWithoutStatus(
+    const ObjectPathCallback& callback,
+    const ErrorCallback& error_callback,
+    dbus::Response* response) {
+  if (!response) {
+    error_callback.Run(kInvalidResponseErrorName, kInvalidResponseErrorMessage);
+    return;
+  }
+  dbus::MessageReader reader(response);
+  dbus::ObjectPath result;
+  if (!reader.PopObjectPath(&result)) {
+    error_callback.Run(kInvalidResponseErrorName, kInvalidResponseErrorMessage);
+    return;
+  }
+  callback.Run(result);
+}
+
 void ShillClientHelper::OnDictionaryValueMethod(
     const DictionaryValueCallback& callback,
     dbus::Response* response) {
   if (!response) {
     base::DictionaryValue result;
     callback.Run(DBUS_METHOD_CALL_FAILURE, result);
     return;
   }
   dbus::MessageReader reader(response);
   scoped_ptr<base::Value> value(dbus::PopDataAsValue(&reader));
@@ skipping 13 matching lines @@
 }
 
 void ShillClientHelper::OnDictionaryValueMethodWithErrorCallback(
     const DictionaryValueCallbackWithoutStatus& callback,
     const ErrorCallback& error_callback,
     dbus::Response* response) {
   dbus::MessageReader reader(response);
   scoped_ptr<base::Value> value(dbus::PopDataAsValue(&reader));
   base::DictionaryValue* result = NULL;
   if (!value.get() || !value->GetAsDictionary(&result)) {
-    const std::string error_name;  // No error name.
-    const std::string error_message = "Invalid response.";
-    error_callback.Run(error_name, error_message);
+    error_callback.Run(kInvalidResponseErrorName, kInvalidResponseErrorMessage);
     return;
   }
   callback.Run(*result);
 }
 
 void ShillClientHelper::OnError(const ErrorCallback& error_callback,
                                    dbus::ErrorResponse* response) {
   std::string error_name;
   std::string error_message;
   if (response) {
     // Error message may contain the error message as string.
     dbus::MessageReader reader(response);
     error_name = response->GetErrorName();
     reader.PopString(&error_message);
   }
   error_callback.Run(error_name, error_message);
 }
 
 }  // namespace chromeos