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OpenChange (MAPIStore) - Gearman Connector

**Overview**

Implementation of an OpenChange backend (MAPIStore) as a connector to a CalDAV and CardDAV server. The main objective of this backend should be to act as an interface between OpenChange - which is an open-source Exchange server implementation - and our CalDAV/CardDAV server via Gearman. Therefore we need a MAPIStore implementation compiled as a Dynamic Shared Object (DSO) with the following requirements:

- Fetching contacts

- Storing (create, update) contacts

- Fetching calendars of an user

- Fetching calendar items (events, tasks)

- Storing (create, update) calendar items (events, tasks)

**Implementation Description**

Because the final product should be a Dynamic Shared Object, we don't impose a restriction on the programming language to achieve our requirements. C/C++ would be an option since the example shown in the MAPIStore Dev Guide is written in C and there are language bindings for Gearman available.

***Requirements:***

It's not necessary to implement all operations that MAPIStore supports - OpenChange allows you to define a specific backend for each top-level directory. We only need implementations for Calendars, Tasks and Contacts. The backend should therefore NOT include handling Mails and Files/Notes, etc.

Every atomic operation for these top-level directories has to be implemented.

This should include

* fetching contacts

* creating contacts

* updating contacts

* fetching calendars

* fetching events

* creating events

* updating events

* fetching tasks

* creating tasks

* updating tasks

These operations have to send/receive data via a Gearman client to/from a running Gearman worker. So for every operation, a function/callback has to be defined, that sends data to the Gearman worker or receives data from the worker. The data should be sent as a *JSON-encoded string*.

**Product summary**

The final product *MUST* include:

- MAPIStore backend implementation as a Dynamic Shared Object (DSO) that can be linked into an OpenChange server.

- Option to configure Gearman servers.

- Implementations of all necessary operations (see above) by sending/receiving data (calendars, calendar items (events, tasks), contacts) via a Gearman client and therefore acting as an interface to our CalDAV/CardDAV server.

- Documentation:

- Brief installation/build description for the Dynamic Shared Object to work with OpenChange. (including how to set the Gearman servers (hosts/ports))

- List of implemented operations with a short description

- List of all Gearman functions (probably one per operation) with name, parameters (Datatype/JSON-format) and response/return-value (Datatype/JSON-format)

The following resources should prove useful:

* OpenChange's MAPIStore Development Guide: [url removed, login to view]

* SOGo implementation of a MAPIStore backend (source code in Objective C): [url removed, login to view]

- especially the file MAPIStoreSOGo.m ([url removed, login to view]) with the entry point for the MAPIStore SOGo backend (line 1509).

* Gearman documentation: [url removed, login to view]

Habilidades: Programação C, Programação C++ , Objective C

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Acerca do Empregador:
( 0 comentários ) Graz, Austria

ID do Projeto: #5147720

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