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gaiden-thrift-pool

v1.0.6

Published

A module that wraps thrift interfaces in connection pooling logic to make them more resilient.

Downloads

9

Readme

Thrift Pool

A module that wraps thrift interfaces in connection pooling logic to make them more resilient.

The node thrift code exposes a service and types file. The node thrift client also exposes interfaces to create connections to the thrift server. There is no way to use the node thrift library to do connection pooling or to create new connections if existing connections fail.

This library takes in a thrift service and wraps the methods with connection pooling logic (based on node-pool).

Installation

npm install node-thrift-pool

Usage

var thrift = require('thrift'),
  Service = require('./gen-nodejs/Service'),
  Types = require('./gen-nodejs/types'),
  thriftPool = require('node-thrift-pool');

var thrift_client = thriftPool(thrift, Service, {host: "localhost", port: 9090});

/*
 * thrift_client is now an initialized thrift client that uses connection pooling behind the scenes
 * thrift_client.method(function(err, returned_data){console.log(err, returned_data)});
 */

Supported pooling options

Options to use when creating pool, defaults match those used by node-pool.

  • host - Required - The host of the thrift server to connect to
  • port - Required - The port of the thrift server to connect to
  • log - Default: false - true/false or function
  • max_connections - Default: 1 - Max number of connections to keep open at any given time
  • min_connections - Default: 0 - Min number of connections to keep open at any given time
  • idle_timeout - Default: 30000 - Time (ms) to wait until closing idle connections

Thrift options - optional

All thrift options are supported and can be passed in as an object in addition to the pooling options.

var thrift_options = {
    timeout: 250
};
var thrift_client = thriftPool(thrift, Service, {host: "localhost", port: 9090}, thrift_options);

Note: If the timeout option is passed in the thrift_options object, a timeout listener will be added to the connection.

  • If the timeout event is emitted on a connection while it is in the pool, the connection will be invalidated and treated the same way as if an error or close event had been emitted.
  • If the timeout event is emitted after the connection is acquired a timeout error will be returned: new Error "Connection timeout".

Development

After making any changes, please add or run any required tests. Tests are located in the test directory, and can be run via npm:

npm test
  • The debug package is used to simplify debugging. To turn on logging: export DEBUG=thrift-pool
  • Source hosted at GitHub
  • Report issues, questions, feature requests on GitHub Issues

Pull requests are welcome! Please ensure your patches are well tested. Please create separate branches for separate features/patches.