https://github.com/casualjim/go-curator

https://github.com/casualjim/go-curator

Last synced: 23 days ago
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• Host: GitHub
• URL: https://github.com/casualjim/go-curator
• Owner: casualjim
• Created: 2014-08-14T05:54:29.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-09-22T08:00:25.000Z (about 10 years ago)
• Last Synced: 2024-10-04T19:43:36.721Z (about 1 month ago)
• Language: Go
• Size: 207 KB
• Stars: 6
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# go-curator

==========

A port of the netflix curator zookeeper framework, mostly for service discovery

Provides a zookeeper client with a high tolerance for disconnections. It optionally hooks into the netflix exhibitor

framework, so that it can reconfigure itself as the zookeeper ensemble changes.

## Ensemble providers

An ensemble provider interface represents a dynamic connection string. The library detects when there are changes in the

connection string and will reconnect as needed.

## Event bus

You can register channels as event handlers for connection events. When the message sent to a handler channel isn't

handled withing 50ms (by default) then the handler gets unregistered and a warning is logged. 

### How it works

Connection 

  * every operation is handled in a retry loop

  * a connection is watched and when a session event occurs an appropriate action is taken, on expired session it reconnects

  * the retry loop does: 

     * check for connection string changes, on change reconnect

     * try the operation when fails check policy (predicate) and retry or bail

  * consumers can register channels as event handlers for connection events so they know how to change internal state

Node Cache

  * caches a single node 

Children Cache

  * caches a map of children