redist

How to install

npm install redist --save

redist allows you to easily handle redis transactions.

How to use

var redist = require('redist')();

var transact = redist.transact(function(read, done) {
	// read block
	read.smembers('users').now(function(err, results) {
		read.group();
		results.forEach(function(id) {
			read.get('users:'+id+':balance');
		});
		read.ungroup();
		done();
	});
}, function(write, results, done) {
	// write block
	var total = 0;
	results[1].forEach(function(balance) {
		total += parseFloat(balance);
	});
	write.set('total_balance', total);
	done(null, total);
}, function(err, result) {
	// finished
});

transact.on('error', function(err) {
	// when error occurs
});

transact.on('retry', function(num) {
	// num - number of retries
});

transact.on('end', function(results) {
	// when transaction ends
});

Options

redist also accepts options

var redist = require('../index')(opts);

• maxRetries(10) - maximum number of retries before redist returns an error.
• backoff - object containing options for exponential backoff strategy.
  • initialDelay(50) - delay of the first retry.
  • maxDelay(5000) - maximum delay.
  • factor(2) - must be greater than 1.
  • randomizationFactor(0.2) - must be between 0 and 1.

For other options, please see redisp.

License

MIT