Delphi ORM SOA MVC SQL NoSQL JSON REST mORMot

mORMot & Friends
Arnaud Bouchez

Great times for us
Delphi is Hype
Delphi + Pascal > Ruby
If you say Delphi is dead,
YOU are dead!

Two Languages In One
Application Language
like Java C#
System Language
like C C++

Dual Memory Management
Automatic Memory Management
COW and refcount
Manual Memory Management
Uses much less CPU/RAM
Server stability

Dual Memory Management
Automatic Memory Management
COW and refcount
Manual Memory Management
Uses much less CPU/RAM
Server stability
ARC?

New opportunities
New platforms
New compilers
Great communities
Third parties
Open Source

Unleash your power
Decades of experience
Business knowledge
Productive tools

Unleash your power
Decades of experience
Business knowledge
Productive tools
Innovative concepts

mORMot & Friends
Open Source
Architecture & Design
Cross-Cutting features
DB Layer
ORM/ODM/SOA/MVC
Cross platform
Q&A

Open Source
Started in 2008
3520 checkins since 2010
56 COCOMO years

Open Source
Started in 2008
3520 checkins since 2010
56 COCOMO years
http://synopse.info/fossil
http://github.com/synopse/mORMot
http://openhub.net/p/mormot

LOC
Code 213,000
Comments 50,000
Blanks 21,000
Total 284,000
http://synopse.info/fossil
http://github.com/synopse/mORMot
http://openhub.net/p/mormot

Doc as Specs
Exhaustive
Maintained
Open Source
http://synopse.info/files/html
1800 pages of pdf
SynProject powered

Test Driven
17,599,266 tests
Write the test
Fail the test
Write the implementation
Pass the test

Test Driven
17,599,266 tests
Regression
Performance
Thread safety
Cross platform – Cross compiler

http://synopse.info/forum
Feedback and support
Topics 2,200
Posts 13,500
Registered users 1,100

Hall of fame
Alexander (sha)
Alfred Glaenzer (alf)
Arnaud Bouchez
Aweste
Cheemeng
CoMPi
Damien (ddemars)
David Mead (MDW)
Delphinium
DigDiver
EMartin
Eric Grange
Esmond
Joe (jokusoft)
Jordi Tudela
Mario Moretti
Martin Suer
MChaos
Ondrej (reddwarf)
Pavel (mpv)
Pierre le Riche
RalfS
Sabbiolina
Sanyin
Sinisa (sinisav)
Sllimr7139
Vadim Orel
Win2014
Wolfgang Ehrhardt (via MPL)

Hall of fame
Alexander (sha)
Alfred Glaenzer (alf)
Arnaud Bouchez
Aweste
Cheemeng
CoMPi
Damien (ddemars)
David Mead (MDW)
Delphinium
DigDiver
EMartin
Eric Grange
Esmond
Joe (jokusoft)
Jordi Tudela
Mario Moretti
Martin Suer
MChaos
Ondrej (reddwarf)
Pavel (mpv)
Pierre le Riche
RalfS
Sabbiolina
Sanyin
Sinisa (sinisav)
Sllimr7139
Vadim Orel
Win2014
Wolfgang Ehrhardt (via MPL)
… YOU ?

Architecture Switch
BBM → Clean
nTier → SOA
SOAP → REST
RAD → MVC/MVVM
SQL → ORM
NoSQL → ODM
OOP → SOLID

BBM → Clean
Architecture?
BBM
Clean & Agile

Architecture
Premature architecture
may be the root of all evil
Not looking at the big picture
is WORSE

Prevalent Architecture
Big Ball Of Mud

Multi-Tier
Three-tier architecture

Multi-Tier
Four-tier architecture

Multi-Tier
Logical vs Physical

Service-Oriented Architecture (SOA)

Flexible set
of design principles
Inter-operable
producer/consumer services

Inter-operable
producer/consumer services

Service Composition

Loosely coupled
systems and domains
Mostly stateless
MicroServices

Implementation Independence
Platform
Location
Availability
Versions

SOAP
Simple Object Access Protocol
XML WSDL
Standard
Proven

SOAP
Simple? Object Access Protocol
XML WSDL
Standard?
Proven

REST
Brother of HTTP
Same Father, Roy Fielding

REST
Brother of HTTP
Resource based
Using identifiers
Uniform interface
Transmission by representation
Stateless

REST
Brother of HTTP
http://www.mysite.com/pictures/logo.png
Image Resource

REST
Brother of HTTP
http://www.mysite.com/index.html
Static Resource

REST
Brother of HTTP
http://www.mysite.com/Customer/1001
Dynamic Resource returning XML or JSON content

REST
Brother of HTTP
http://www.mysite.com/Customer/1001/Picture
Dynamic Resource returning an image

REST
Brother of HTTP
http://www.mysite.com/pictures/logo.png
Image Resource
http://www.mysite.com/index.html
Static Resource
http://www.mysite.com/Customer/1001
Dynamic Resource returning XML or JSON content
http://www.mysite.com/Customer/1001/Picture
Dynamic Resource returning an image

REST
Brother of HTTP
But
REST <> HTTP
REST over any message protocol
even stand-alone REST

REST Interfaces
HTTP Verbs
GET
POST
PUT
DELETE
CRUD Operations
READ
CREATE
UPDATE
DELETE

REST Interfaces
HTTP Verbs
GET
POST
PUT
DELETE
SQL Statements
SELECT
INSERT
UPDATE
DELETE

REST Interfaces
Verbs + URI vs
GET customer/123
POST customer
PUT order/456
DELETE order/456
Methods
GetCustomer
NewCustomer
ModifyOrder
DeleteOrder

REST Content
Transmitted
by representation
XML
<Customer>
<ID>1234</ID>
<Name>Dupond</Name>
<Address>Tree street
</Address>
</Customer>
JSON
{"Customer":
{"ID":1234,
"Name":"Dupond",
"Address":"Tree street"
}
}

REST Content Troll
XML vs
Type safe
SOAP standard
Binary (CDATA)
Validation (XSDL)
JSON
Truly human-readable
Native AJAX / JavaScript
Compact (UTF-8 friendly)
Simple to implement

RAD → MVC / MVVM
RAD
MVC & MVVM
SOA

RAD
Mixes UI and logic
→ Maintenance
Evolution
Test
Multi-platform
Nightmare

MVC
Isolate domain logic from UI
Model
View
Controller – View Model

MVC & SOA
View
Controller
Model

MVC & Web
View
Controllers
Model

SQL/NoSQL→ ORM/ODM
SQL
NoSQL
ORM
ODM

SQL
De facto Standard
ACID by transactions
Relational (RDBMS)

NoSQL
Not Only SQL
Graphs
Aggregates

NoSQL
Aggregate = all data in a given context
(boundaries for ACID)

SQL / NoSQL
SQL
Normalization
Consistency
Transactions
Vertical scaling
NoSQL
Denormalization
Duplicated data
Document ACID
Horizontal scaling

SQL
De facto Standard?
ACID by transactions
Relational? (RDBMS)

ORM
Object Relational Mapping
CRUD on objects
vs
SQL on relational tables

ORM
Object Relational Mapping
By convention
By configuration
Database-First / Code-First

ORM
In practice
myObject.Value := 10;
myContext.Update(myObject);
UPDATE OBJTABLE SET …
01010101001110011111

ORM
Benefits
Stay at OOP level
Manage SQL flavors
Persistence Ignorance
Optimize SQL
Cache

ORM
No magic bullet
Hard task
Hidden process
Legacy (tuned) SQL
Performance

NoSQL
Aggregate = all data in a given context
These documents map our objects!

ODM
Object Document Mapping
Aggregate = Object
Flexible Schema
Denormalized

OOP → SOLID
Interfaces
SOLID
Just because you can doesn’t mean you should

Interfaces
What, not how
A type that comprises
abstract virtual methods
Rely on abstraction
rather than implementation

Interfaces
Abstraction is your health
Publish classes as services
Test, mock
Write SOLID code

Interfaces
Test, mock
Write SOLID code
and manage memory for you

Interfaces
Test, mock
Write SOLID code
and manage memory for you
unless zeroing weak pointers

SOLID Principles
Single responsibility
Open/closed
Liskov substitution
Interface segregation
Dependency inversion
.. unleash interfaces!

Cross Cutting Features
UTF-8 JSON
TDynArray
TDocVariant
Logging
Testing
Compression
Crypto
PDF
Mustache
SpiderMonkey
Uncoupled features: could be used
without the ORM/SOA/MVC framework

SynCommons
UTF-8 JSON
From the ground up
With objects, records,
dynamic arrays, variants, any value
Performance and integration

SynCommons
TDynArray
Wrapper to an existing dynamic array
TList<> on steroids
e.g. sorting, search,
binary or JSON serialization
using enhanced RTTI if available

SynCommons
TDynArray
In conjunction with records and variants:
value objects
data transfer objects (DTO)

SynCommons
TDocVariant
Stores documents
objects, arrays, variants
with low overhead
natively JSON
with late-binding support

SynCommons
TDocVariant
var V: variant; // stored as any variant
...
TDocVariant.New(V);
// or slightly slower V := TDocVariant.New;
V.name := 'John';
// property accessed via late-binding
V.year := 1972;
// now V contains {"name":"john","year":1972}

SynCommons
TDocVariant
V.name := 'Mark'; // overwrite a property value
writeln(V.name); // will write 'Mark'
V.age := 12; // add a property to the object
writeln(V.age); // will write '12'
writeln(V); // implicit conversion to JSON string
// i.e. '{"name":"Mark","age":12}'
writeln(VariantSaveJSON(V1)); // as RawUTF8

SynCommons
TDocVariant + mORMot.pas
TSQLRecordData = class(TSQLRecord)
private
fName: RawUTF8;
fData: variant;
public
published
property Name: RawUTF8 read fTest write fTest
stored AS_UNIQUE;
property Data: variant read fData write fData;
end;

We store a TDocVariant in Data
to mutate a SQL database
into a NoSQL engine

var aRec: TSQLRecordData;
aID: integer;
begin
// initialization of one record
aRec := TSQLRecordData.Create;
aRec.Name := 'Joe’;
// create a TDocVariant
aRec.data := _JSONFast('{name:"Joe",age:30}');
// or we can use this overloaded constructor
aRec := TSQLRecordData.Create(
['Joe',_ObjFast(['name','Joe','age',30])]);

// now we can play with the data, e.g. via late-binding:
writeln(aRec.Name); // will write 'Joe'
writeln(aRec.Data); // write '{"name":"Joe","age":30}
// one year older
aRec.Data.age := aRec.Data.age+1;
// add a property to the schema
aRec.Data.interests := 'football';
aID := aClient.Add(aRec);
// we stored {"name":"Joe","age":31,"interests":"footbal"}
aRec.Free;
// now we can retrieve the data e.g. via aID
end;

Data will be stored as TEXT
in the underlying RDBMS

Data will be stored as TEXT
in the underlying RDBMS
Of course, if the database is a MongoDB engine,
the data will be stored as a true BSON document

SynCommons
Logging
Low overhead
Local or remote
Fast viewer tool
Exception catch, stack trace
Used by the whole framework

SynCommons
Testing
Light and cross-platform
Convention over configuration
Stubs and mocks

Compression
SynZip
faster unzip
SynLZO
SynLZ
speed symmetric

SynCrtSock
Cross-platform Network library
Socket WinHTTP WinINet clients
Optimized HTTP server
IOCP driven
http.sys kernel-mode

SynCrypto
SHA 1
SHA 256
AES 128
AES 192
AES 256
MD5
Pascal or optimized asm

SynPDF
From TCanvas to PDF
Unicode
Font embedding
Encryption

SynPDF
From TCanvas to PDF
Unicode
Font embedding
Encryption
Code-based report engine

SynMustache
Mustache template system
Data context as TDocVariant
UTF-8 JSON
With extensions

SynMustache
Data Context
{
"header": "Colors",
"items": [
{"name": "red", "first": true, "url": "#Red"},
{"name": "green", "link": true, "url": "#Green"},
{"name": "blue", "link": true, "url": "#Blue"}
],
"empty": true
}

SynMustache
Template
<h1>{{header}}</h1>
{{#items}}
{{#first}}
<li><strong>{{name}}</strong></li>
{{/first}}
{{#link}}
<li><a href="{{url}}">{{name}}</a></li>
{{/link}}
{{/items}}
{{#empty}}
<p>The list is empty.</p>
{{/empty}}

SynMustache
Result
<h1>Colors</h1>
<li><strong>red</strong></li>
<li><a href="#Green">green</a></li>
<li><a href="#Blue">blue</a></li>
<p>The list is empty.</p>

SynSM
Latest Spidermonkey
Javascript JIT engine
Call JS from Delphi
TSMVariant for late binding

SynSM
Latest Spidermonkey
Javascript JIT engine
Call JS from Delphi
TSMVariant for late binding
SynSM + mORMot = multi-threaded node.js

DB Layer
SynMongoDB
NoSQL
SynDB
SQL
Uncoupled features: could be used
without the ORM/SOA/MVC framework

SynMongoDB
MongoDB native access
BSON types - TBSONVariant
TDocVariant
Extended JSON

SynDB
Direct RDBMS access layer
Not linked to DB.pas
Multi providers
UTF-8 JSON
Interface based
Knows SQL dialects
SynDBExplorer

SynDB
Not linked to DB.pas
Enter the 21th century
Less data types
By-pass slow TDataSet
Unicode even before Delphi 2009
Array binding
Native JSON support

SynDB
Connect to a DB
var Props: TSQLDBConnectionProperties;
...
Props := TOleDBMSSQLConnectionProperties.Create(
'.SQLEXPRESS','AdventureWorks2008R2','','');
try
UseProps(Props);
finally
Props.Free;
end;

SynDB
Execute statements
procedure UseProps(Props: TSQLDBConnectionProperties);
var I: ISQLDBRows;
begin
I := Props.Execute(
'select * from Sales.Customer '+
'where AccountNumber like ?',['AW000001%']);
while I.Step do
assert(Copy(I['AccountNumber'],1,8)='AW000001');
end;

SynDB
Late-binding
procedure UseProps(Props: TSQLDBConnectionProperties);
var Row: Variant;
begin
with Props.Execute(
'select * from Sales.Customer '+
'where AccountNumber like ?‘,['AW000001%'],@Row) do
while Step do
assert(Copy(Row.AccountNumber,1,8)='AW000001');
end;

SynDB
TQuery emulation
Q := TQuery.Create(aSQLDBConnection);
try
Q.SQL.Clear; // optional
Q.SQL.Add('select * from DOMAIN.TABLE');
Q.SQL.Add(' WHERE ID_DETAIL=:detail;');
Q.ParamByName('DETAIL').AsString := '1234';
Q.Open;
Q.First; // optional
while not Q.Eof do begin
assert(Q.FieldByName('id_detail').AsString='1234');
Q.Next;
end;
Q.Close; // optional
finally
Q.Free;
end;

SynDB
Fast read/only TDataSet
ds1.DataSet := ToDataSet(ds1,
aProps.Execute('select * from people',[]));
Read/write TClientDataSet
ds1.DataSet := ToClientDataSet(ds1,
aProps.Execute('select * from people',[]));

SynDB
Remote access via HTTP
http.sys based server
SynLZ compression
Digital signature
Authentication

SynDB
Remote access via HTTP
Mutate SQLite3 into a
high performance Client-Server RDBMS
No library to deploy on Client side
Easy remote hosting on Server side

SynDBExplorer
Manage and request your DBs
Any supported database
High performance grid
Export to CSV or SQLite3
SQLite3 integrated
Remote server or client

ORM/ODM/SOA/MVC
RESTful
ORM
SOA
MVC

RESTful ORM
Not an ORM
with a transmission layer
But a RESTful ORM
from the ground up

TSQLRest
RESTful access
CRUD methods - Cache
Authentication – Authorization
Services
On Client or Server side

TSQLRestServer
Server Storage
In-memory
SQLite3 local
External SQL
External NoSQL
Redirected

TSQLRestServer
Per table redirection

TSQLRestClient
Client Access
In process
Library
HTTP
Named pipes
Windows messages

TSQLRecord
TSQLSampleRecord = class(TSQLRecord)
private
fQuestion: RawUTF8;
fName: RawUTF8;
fTime: TModTime;
published
property Time: TModTime read fTime write fTime;
property Name: RawUTF8 read fName write fName;
property Question: RawUTF8 read fQuestion write fQuestion;
end;

TSQLRecord
TSQLSampleRecord = class(TSQLRecord)
private
fQuestion: string;
fName: string;
fTime: TModTime;
published
property Time: TModTime read fTime write fTime;
property Name: string read fName write fName;
property Question: string read fQuestion write fQuestion;
end;

TSQLModel
Define your data model
function CreateSampleModel: TSQLModel;
begin
result := TSQLModel.Create([TSQLSampleRecord]);
end;
Shared on both Client and Server side

Database: TSQLRest
CRUD Operations
procedure TForm1.FindButtonClick(Sender: TObject);
var Rec: TSQLSampleRecord;
begin
Rec := TSQLSampleRecord.Create(
Database,'Name=?',[StringToUTF8(NameEdit.Text)]);
try
if Rec.ID=0 then
QuestionMemo.Text := 'Not found' else
QuestionMemo.Text := UTF8ToString(Rec.Question);
finally
Rec.Free;
end;
end;

Database: TSQLRest
CRUD Operations
procedure TForm1.AddButtonClick(Sender: TObject);
var Rec: TSQLSampleRecord;
begin
Rec := TSQLSampleRecord.Create;
try
Rec.Name := StringToUTF8(NameEdit.Text);
Rec.Question := StringToUTF8(QuestionMemo.Text);
if Database.Add(Rec,true)=0 then
ShowMessage('Error adding the data') else begin
NameEdit.Text := '';
QuestionMemo.Text := '';
NameEdit.SetFocus;
end;
finally
Rec.Free;
end;
end;

TSQLRestServer
var Model: TSQLModel;
Database: TSQLRestServerDB;
HTTPServer: TSQLHttpServer;
…
Model := CreateSampleModel;
Database := TSQLRestServerDB.Create(Model,'data.db3');
Database.CreateMissingTables;
HTTPServer := TSQLHttpServer.Create('8080',[Database]);
HTTPServer.AccessControlAllowOrigin := '*';

TSQLRestClient
Database: TSQLRest;
…
Database := TSQLHttpClient.Create(ServerIP,'8080',Model);

Sample 04
http://localhost:8080/root
http://localhost:8080/root/samplerecord
disable authentication…
http://localhost:8080/root/samplerecord
http://localhost:8080/root/samplerecord/1

TSQLRestServer
External SQL
Props: TSQLDBConnectionProperties;
Database: TSQLRestServerDB;
HTTPServer: TSQLHttpServer;
…
Props := TODBCConnectionProperties.Create('',
'Driver=PostgreSQL Unicode';…','','');
VirtualTableExternalRegisterAll(Model,Props);
Database := TSQLRestServerDB.Create(Model,':memory:');
Database.CreateMissingTables;
HTTPServer := TSQLHttpServer.Create('8080',[Database]);
HTTPServer.AccessControlAllowOrigin := '*';

TSQLRecord
Mapping by Convention
TSQLRecordPeopleExt = class(TSQLRecord)
..
published
property FirstName: RawUTF8 index 40
property LastName: RawUTF8 index 40
property Data: TSQLRawBlob
property YearOfBirth: integer
property YearOfDeath: word
property LastChange: TModTime
property CreatedAt: TCreateTime
end;

TSQLRecord
Mapping by configuration
Model := TSQLModel.Create([TSQLRecordPeopleExt],'root');
VirtualTableExternalRegister(
Model,TSQLRecordPeopleExt,Props,'Test.People');

TSQLRecord
Mapping by configuration
Model := TSQLModel.Create([TSQLRecordPeopleExt],'root');
VirtualTableExternalRegister(
Model,TSQLRecordPeopleExt,Props,'Test.People');
Model.Props[TSQLRecordPeopleExt].ExternalDB.
MapField('ID','Key').
MapField('YearOfDeath','YOD');

TSQLRecord Change Tracking
Objects Time Machine
Database.TrackChanges([TSQLInvoice]);

TSQLRecord Change Tracking
Objects Time Machine
Database.TrackChanges([TSQLInvoice]);
aInvoice := TSQLInvoice.Create;
aHist := TSQLRecordHistory.CreateHistory(
aClient,TSQLInvoice,400);
try
writeln('History Count: ',aHist.HistoryCount);
for i := 0 to aHist.HistoryCount-1 do begin
aHist.HistoryGet(i,aEvent,aTimeStamp,aInvoice);
writeln;
writeln('Event: ',ord(aEvent))^);
writeln('TimeStamp: ',TTimeLogBits(aTimeStamp).ToText);
writeln('Identifier: ',aInvoice.Number);
end;

BATCH
Send all modifications at once
“Unit of Work” pattern
Array Binding or Multiple INSERT
Huge performance boost

SOA
Interface-based services
Design by contract
Factories
Instances live mode
REST UTF-8 JSON Security
Thread safety

SOA
Define the contract
type
ICalculator = interface(IInvokable)
['{9A60C8ED-CEB2-4E09-87D4-4A16F496E5FE}']
/// add two signed 32 bit integers
function Add(n1,n2: integer): integer;
end;

SOA
Implement the contract
type
TServiceCalculator = class(TInterfacedObject, ICalculator)
public
function Add(n1,n2: integer): integer;
end;
function TServiceCalculator.Add(n1, n2: integer): integer;
begin
result := n1+n2;
end;

SOA
Publish the contract on the Server Side
RestServer.ServiceRegister(
TServiceCalculator,[TypeInfo(ICalculator)],sicShared);
Define the contract on the Client Side
RestServer.ServiceRegister(
[TypeInfo(ICalculator)],sicShared);

SOA
Use the service
var I: ICalculator;
begin
I := Rest.Services<ICalculator>;
if I<>nil then
result := I.Add(10,20);
end;
var I: ICalculator; // for older versions of Delphi
begin
if Rest.Services['Calculator'].Get(I) then
result := I.Add(10,20);
end;
On both client and server sides

MVC/MVVM
Auto Generated UI
Dynamic Web Sites

Web Apps
Model
View
Controller
ORM
Mustache
IMVCApplication
Classic MVC

Web Apps
Model
View
Controller
MVCModel.pas
*.html
MVCViewModel.pas
Blog MVC Sample

Web Apps
Implement a Controller
method name → page name
var const params → URI params
var out params → Mustache context

Web Apps
procedure TBlogApplication.AuthorView(var ID: integer;
out Author: TSQLAuthor; out Articles: variant);
begin
RestModel.Retrieve(ID,Author);
Author.HashedPassword := ''; // no need to publish it
if Author.ID<>0 then
Articles := RestModel.RetrieveDocVariantArray(
TSQLArticle,'','Author=? order by RowId desc limit
50',[ID],ARTICLE_FIELDS) else
raise EMVCApplication.CreateGotoError(HTML_NOTFOUND);
End;
→ /blog/AuthorView?....

Web Apps
http://localhost:8092/blog/mvc-info
→ /blog/AuthorView?ID=..[integer]..
{{Main}}: variant
{{ID}}: integer
{{Author}}: TSQLAuthor
{{Articles}}: variant

Web Apps
/blog/AuthorView?ID=123
begin
→ ID = 123
end;

Web Apps
Mustache Data Context
begin
end;
{{ID}} {{Author}} {{Articles}}

Web Apps
Sample 30
http://localhost:8092/blog/default
http://localhost:8092/blog/mvc-info
http://localhost:8092/blog/articleView?id=99
http://localhost:8092/blog/articleView/json?id=99
http://localhost:8092/blog/authorView?id=1

Server
Delphi
Win32 Win64
XE7 XE6 XE5 XE4 XE3 XE2
XE1 XE0 XE-1 XE-2 XE-3 XE-4 XE-5
FPC
Win32 Linux-x86 Linux-ARM
2.7.1 svn (2.6.4)

Server
Delphi
Win32 Win64
XE 2010 2009 2007 2005 7 6
FPC
Win32 Linux-x86 Linux-ARM
2.7.1 svn (2.6.4)

Clients
Delphi
Win32 Win64 OSX Android iOS
XE 2010 2009 2007 2005 7 6 5
FPC
All platforms
2.6.x 2.7.x

Clients
Smart Mobile Studio 2.1
HTML5
Mobile / PhoneGap
any REST JSON Client
AJAX C# Java …

Sample 27
Project14ServerHttpWrapper
http://localhost:888/root/wrapper/
+ SMS Project14Client
RegressionTests + LogView server
RegressionTestsServer + SMS Sample 29

RoadMap
Data Replication
Master / Slave
P2P
Offline mode
Event-Driven
…
http://synopse.info/fossil/wiki?name=RoadMap

mORMot & Friends
Open Source
Architecture & Design
Cross-Cutting features
DB Layer
ORM/ODM/SOA/MVC
Cross platform
Q&A
http://synopse.info/files/pdf/BeDelphi2014.pdf

Delphi ORM SOA MVC SQL NoSQL JSON REST mORMot

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