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A wrapper for switching the master/slave connection information.
var async = require('async')
var cluster = require('../index')
var database = require('./database.json')
var simpleQuery = function (sql, value, cb) {
cluster.get('slave*', function (err, conn) {
if (err) {
return console.error(err)
}
conn.query(sql, value, function (err, rows) {
conn.release()
if (err) {
console.log(sql, value)
throw err
}
cb(err, rows)
})
})
}
// set event
cluster.on('remove', function (param) {
console.info(param)
})
// load database
cluster.load('mysql', function (err) {
if (err) {
return console.error(err)
}
var tasks = []
for (var i = 0; i < database.length; i++) {
tasks.push(function (config) {
return function (cb) {
cluster.add(config.id, config, function (err) {
if (err) {
return cb(err)
}
cb(null, config.id)
})
}
}(database[i]))
}
async.parallel(tasks, function (err, result) {
if (err) {
return console.error(err)
}
console.log('load cluster complete.', result)
simpleQuery('SELECT * FROM users LIMIT 1', null, function (err, rows) {
if (err) {
return console.error(err)
}
console.log(rows)
})
})
})
// database.json
[
{
"id": "master",
"host": "host",
"user": "username",
"password": "password",
"database": "database"
},
{
"id": "slave1",
"host": "host",
"user": "username",
"password": "password",
"database": "database"
},
{
"id": "slave2",
"host": "host",
"user": "username",
"password": "password",
"database": "database"
},
{
"id": "stats1",
"host": "host",
"user": "username",
"password": "password",
"database": "database"
},
{
"id": "stats2",
"host": "host",
"user": "username",
"password": "password",
"database": "database"
}
]
See the documentation
See the changelog
cluster-db is licensed under the MIT license.
FAQs
A wrapper for switching the master/slave connection information.
We found that cluster-db demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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