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Mongo DB Driver for WP7. Athens-Mongo DB-User-Group 3 rd Meeting By Nick Tsapakis. Intro. What is a Mongo DB driver Why WP7 Tools used How we worked Driver explained - Demo. Tools used. Netcat Wireshark WP7 SDK – VS2010 – C# Mongo DB. Specification. Mongo DB wire protocol

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Mongo db driver for wp7

Mongo DB Driver for WP7

Athens-Mongo DB-User-Group

3rd Meeting

By Nick Tsapakis


Intro
Intro

  • What is a Mongo DB driver

  • Why WP7

  • Tools used

  • How we worked

  • Driver explained - Demo


Tools used
Tools used

  • Netcat

  • Wireshark

  • WP7 SDK – VS2010 – C#

  • Mongo DB


Specification
Specification

  • Mongo DB wire protocol

    http://docs.mongodb.org/meta-driver/latest/legacy/mongodb-wire-protocol/


How we worked
How we worked

  • Netcat used for sending data to socket without using a program

  • Data for sending placed in a file

  • Command used for sending data:

    nc127.0.0.1 27017 < data_file.txt


How we worked1
How we worked

  • Wireshark used for capturing commands – responses

  • Verifying that captured messages follow Mongo DB wire protocol specification

  • Sending commands we want to implement in driver (select, insert, delete)




How we worked4
How we worked

  • Visual Studio 2010 with WP7 SDK – Free (run apps on emulator)

  • Need registering the phone device as developer device – Not Free

  • Pay approx. 100 dollars for 1 year

  • I am telling you all !!!



Driver details
Driver details

  • Driver consists of 2 classes

  • MongodbDriver.cs is actual Driver class

  • SocketClient.cs is a tcpcomms class used only by MongodbDriver.cs

  • MongodbDriver Methods available

    Find() , insert() , remove()


Messages request reply
Messages Request – Reply

  • There will be no response sent for any other message except OP_QUERY and OP_GET_MORE messages

  • You can determine if a message was successful with a getLastError command

  • The database will respond to an OP_QUERY message with an OP_REPLY message

  • There is no response to an OP_DELETE message

  • There is no response to an OP_INSERT message




How to use driver
How to use Driver

  • Add as reference the 2 classes

  • Create MongodbDriver instance

    MongodbDriver mongo = new MongodbDriver(server, port, database, collection);

  • Call a method

    response = mongo.find(arguments);

    Arguments is a sting with following format (eg.) -> name:magic,pass:mypass,


What is supported
What is supported

  • 3 methods supported for select, insert, delete

  • Only AND among input parameters on the 3 methods

  • Only string, Object ID types supported

  • No getLastErrorcommand supported

  • One OP_REPLY message supported

  • Tested on WP7 phone


Demo

  • Demo on WP7 SDK Emulator

  • Demo on a WP7 mobile device (Nokia Lumia)


Epilogue
Epilogue

  • Comments – suggestions

  • Ideas


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