82 lines
2.1 KiB
JavaScript
82 lines
2.1 KiB
JavaScript
var EventEmitter = require('events').EventEmitter;
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var util = require('util');
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var Client = require(__dirname+'/client');
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var defaults = require(__dirname + '/defaults');
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var pool = require(__dirname + '/pool');
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var Connection = require(__dirname + '/connection');
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var PG = function(clientConstructor) {
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EventEmitter.call(this);
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this.defaults = defaults;
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this.Client = pool.Client = clientConstructor;
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this.Query = this.Client.Query;
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this.pools = pool;
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this.Connection = Connection;
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this.types = require('pg-types');
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};
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util.inherits(PG, EventEmitter);
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PG.prototype.end = function() {
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var self = this;
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var keys = Object.keys(self.pools.all);
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var count = keys.length;
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if(count === 0) {
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self.emit('end');
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} else {
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keys.forEach(function(key) {
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var pool = self.pools.all[key];
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delete self.pools.all[key];
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pool.drain(function() {
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pool.destroyAllNow(function() {
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count--;
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if(count === 0) {
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self.emit('end');
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}
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});
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});
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});
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}
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};
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PG.prototype.connect = function(config, callback) {
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if(typeof config == "function") {
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callback = config;
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config = null;
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}
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var pool = this.pools.getOrCreate(config);
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pool.connect(callback);
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if(!pool.listeners('error').length) {
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//propagate errors up to pg object
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pool.on('error', this.emit.bind(this, 'error'));
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}
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};
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// cancel the query runned by the given client
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PG.prototype.cancel = function(config, client, query) {
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if(client.native) {
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return client.cancel(query);
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}
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var c = config;
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//allow for no config to be passed
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if(typeof c === 'function') {
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c = defaults;
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}
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var cancellingClient = new this.Client(c);
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cancellingClient.cancel(client, query);
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};
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if(typeof process.env.NODE_PG_FORCE_NATIVE != 'undefined') {
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module.exports = new PG(require('./native'));
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} else {
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module.exports = new PG(Client);
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//lazy require native module...the native module may not have installed
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module.exports.__defineGetter__("native", function() {
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delete module.exports.native;
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module.exports.native = new PG(require('./native'));
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return module.exports.native;
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});
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}
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