THRIFT-5012 Centralize configuration aspects into a commonly used configuration object [ci skip]
Client: Delphi
Patch: Jens Geyer

This closes #1955
diff --git a/lib/delphi/src/Thrift.Configuration.pas b/lib/delphi/src/Thrift.Configuration.pas
new file mode 100644
index 0000000..0cb11af
--- /dev/null
+++ b/lib/delphi/src/Thrift.Configuration.pas
@@ -0,0 +1,121 @@
+(*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *)
+
+unit Thrift.Configuration;
+
+interface
+
+uses
+  SysUtils, Generics.Collections, Generics.Defaults;
+
+const
+  DEFAULT_RECURSION_LIMIT  = 64;
+  DEFAULT_MAX_MESSAGE_SIZE = 100 * 1024 * 1024; // 100 MB
+  DEFAULT_MAX_FRAME_SIZE   = 16384000;      // this value is used consistently across all Thrift libraries
+
+  DEFAULT_THRIFT_TIMEOUT = 5 * 1000; // ms
+
+type
+  IThriftConfiguration = interface
+    ['{ADD75449-1A67-4B78-9B75-502A1E338CFC}']
+    function  GetRecursionLimit : Cardinal;
+    procedure SetRecursionLimit( const value : Cardinal);
+    function  GetMaxFrameSize : Cardinal;
+    procedure SetMaxFrameSize( const value : Cardinal);
+    function  GetMaxMessageSize : Cardinal;
+    procedure SetMaxMessageSize( const value : Cardinal);
+
+    property  RecursionLimit : Cardinal read GetRecursionLimit write SetRecursionLimit;
+    property  MaxFrameSize : Cardinal   read GetMaxFrameSize   write SetMaxFrameSize;
+    property  MaxMessageSize : Cardinal read GetMaxMessageSize write SetMaxMessageSize;
+  end;
+
+
+  TThriftConfigurationImpl = class( TInterfacedObject, IThriftConfiguration)
+  strict protected
+    FRecursionLimit : Cardinal;
+    FMaxFrameSize   : Cardinal;
+    FMaxMessageSize : Cardinal;
+
+    // IThriftConfiguration
+    function  GetRecursionLimit : Cardinal;
+    procedure SetRecursionLimit( const value : Cardinal);
+    function  GetMaxFrameSize : Cardinal;
+    procedure SetMaxFrameSize( const value : Cardinal);
+    function  GetMaxMessageSize : Cardinal;
+    procedure SetMaxMessageSize( const value : Cardinal);
+
+  public
+    constructor Create;
+  end;
+
+
+implementation
+
+
+{ TThriftConfigurationImpl }
+
+
+constructor TThriftConfigurationImpl.Create;
+begin
+  inherited Create;
+
+  FRecursionLimit := DEFAULT_RECURSION_LIMIT;
+  FMaxFrameSize   := DEFAULT_MAX_FRAME_SIZE;
+  FMaxMessageSize := DEFAULT_MAX_MESSAGE_SIZE;
+end;
+
+
+function TThriftConfigurationImpl.GetRecursionLimit: Cardinal;
+begin
+  result := FRecursionLimit;
+end;
+
+
+procedure TThriftConfigurationImpl.SetRecursionLimit(const value: Cardinal);
+begin
+  FRecursionLimit := value;
+end;
+
+
+function TThriftConfigurationImpl.GetMaxFrameSize: Cardinal;
+begin
+  result := FMaxFrameSize;
+end;
+
+
+procedure TThriftConfigurationImpl.SetMaxFrameSize(const value: Cardinal);
+begin
+  FMaxFrameSize := value;
+end;
+
+
+function TThriftConfigurationImpl.GetMaxMessageSize: Cardinal;
+begin
+  result := FMaxMessageSize;
+end;
+
+
+procedure TThriftConfigurationImpl.SetMaxMessageSize(const value: Cardinal);
+begin
+  FMaxMessageSize := value;
+end;
+
+
+end.