Retcon

Retcon is a small system to retcon structured documents between two or more data sources. The goal is to de-couple systems which operate on the same data: each can maintain it's own copy of the data and rely on retcon to propagate any changes.

While retcon can propagate non-conflicting changes automatically, most conflicting changes will need to be resolve by a human being.

Retcon also exposes a small network API allowing other tools and humans to post change notifications, resolve conflicts, etc.

Binaries

This package produces three executables:

• retcond: long-running server that receives notifications and issues updates to entity sources as required.
• retcon-client: send a notification to a retcond.
• retcon-oneshot: useful for testing and debugging, perform a retcon update without going through the rigmarole of setting up a retcond and then issuing a requests with retcon-client.

Building

You will require zeromq and libpq installed.

You can build retcon with standard Haskell tools:

Cabal

Building retcon with [cabal][] is straightforward:

cabal configure
cabal build
cabal install

Stack

Building retcon with [stack][] is also straightforward:

stack install