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Added postgres adapter

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This commit is contained in:
John Crepezzi 2014-06-09 16:50:43 -04:00
parent 447d0aae76
commit ab029eae2f
3 changed files with 66 additions and 61 deletions
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1
lib/document_handler.js
View file

@ -56,7 +56,6 @@ DocumentHandler.prototype.handlePost = function (request, response) {
// What to do when done
var onSuccess = function () {
// Check length
console.log(buffer);
if (_this.maxLength && buffer.length > _this.maxLength) {
cancelled = true;
winston.warn('document >maxLength', { maxLength: _this.maxLength });

124
lib/document_stores/postgres.js
View file

@ -3,72 +3,78 @@
var postgres = require('pg');
var winston = require('winston');
(function () {
// create table entries (id SERIAL primary key, key varchar(255) not null, value text not null, expiration int);
// CREATE UNIQUE INDEX unique_key ON entries (key);
'use strict';
// A postgres document store
var PostgresDocumentStore = function (options) {
this.expireJS = options.expire;
this.connectionUrl = process.env.DATABASE_URL || options.connectionUrl;
};
// A postgres document store
var PostgresDocumentStore = function (options) {
this.expireJS = options.expire * 1000;
this.connectionString = process.env.DATABASE_URL;
};
PostgresDocumentStore.prototype = {
PostgresDocumentStore.prototype = {
// Set a given key
set: function (key, data, callback, skipExpire) {
var now = new Date().getTime() / 1000;
var that = this;
this.safeConnect(function (err, client, done) {
if (err) { return callback(false); }
client.query('INSERT INTO entries (key, value, expiration) VALUES ($1, $2, $3)', [
key,
data,
that.expireJS && !skipExpire ? now + that.expireJS : null
], function (err, result) {
if (err) {
winston.error('error persisting value to postgres', { error: err });
return callback(false);
}
callback(true);
done();
});
});
},
// Get a given key's data
get: function (key, callback, skipExpire) {
var now = new Date().getTime() / 1000;
var that = this;
this.safeConnect(function (err, client, done) {
if (err) { return callback(false); }
client.query('SELECT value from entries where KEY = $1 AND (expiration IS NULL or expiration < $2)', [
key,
that.expireJS ? now - that.expireJS : 0
], function (err, result) {
if (err) {
winston.error('error retrieving value from postgres', { error: err });
return callback(false);
}
callback(result.rows.length ? result.rows[0].value : false);
});
});
},
// A connection wrapper
safeConnect: function (callback) {
postgres.connect(this.connectionString, function (err, client, done) {
// Set a given key
set: function (key, data, callback, skipExpire) {
var now = Math.floor(new Date().getTime() / 1000);
var that = this;
this.safeConnect(function (err, client, done) {
if (err) { return callback(false); }
client.query('INSERT INTO entries (key, value, expiration) VALUES ($1, $2, $3)', [
key,
data,
that.expireJS && !skipExpire ? that.expireJS + now : null
], function (err, result) {
if (err) {
winston.error('error connecting to postgres', { error: err });
callback(err);
winston.error('error persisting value to postgres', { error: err });
return callback(false);
}
callback(true);
done();
});
});
},
// Get a given key's data
get: function (key, callback, skipExpire) {
var now = Math.floor(new Date().getTime() / 1000);
var that = this;
this.safeConnect(function (err, client, done) {
if (err) { return callback(false); }
client.query('SELECT id,value,expiration from entries where KEY = $1 and (expiration IS NULL or expiration > $2)', [key, now], function (err, result) {
if (err) {
winston.error('error retrieving value from postgres', { error: err });
return callback(false);
}
callback(result.rows.length ? result.rows[0].value : false);
if (result.rows.length && that.expireJS && !skipExpire) {
client.query('UPDATE entries SET expiration = $1 WHERE ID = $2', [
that.expireJS + now,
result.rows[0].id
], function (err, result) {
if (!err) {
done();
}
});
} else {
callback(undefined, client, done);
done();
}
});
}
});
},
};
// A connection wrapper
safeConnect: function (callback) {
postgres.connect(this.connectionUrl, function (err, client, done) {
if (err) {
winston.error('error connecting to postgres', { error: err });
callback(err);
} else {
callback(undefined, client, done);
}
});
}
module.export = PostgresDocumentStore;
};
}());
module.exports = PostgresDocumentStore;

2
server.js
View file

@ -37,7 +37,7 @@ if (!config.storage.type) {
var Store, preferredStore;
if (process.env.REDISTOGO_URL) {
if (process.env.REDISTOGO_URL && config.storage.type === 'redis') {
var redisClient = require('redis-url').connect(process.env.REDISTOGO_URL);
Store = require('./lib/document_stores/redis');
preferredStore = new Store(config.storage, redisClient);