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Corrected lock problem with postgres transactions

This commit is contained in:
Thomas FORGIONE 2015-08-20 10:42:30 +02:00
parent d13465e71f
commit 4dfd241064
1 changed files with 20 additions and 10 deletions
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30
controllers/prototype/dbrequests.js vendored
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@ -535,8 +535,12 @@ DBReq.ExpCreator = function(user_id, finishAction) {
// Connect to db
var self = this;
pg.connect(pgc.url, function(err, client, release) {
self.client = client;
self.release = release;
// Start transaction and lock table
self.client.query("BEGIN; LOCK CoinCombination; LOCK Experiment;");
self.execute();
});
};
@ -701,17 +705,23 @@ DBReq.ExpCreator.prototype.execute = function() {
* Release the DB connection and call the callback
*/
DBReq.ExpCreator.prototype.finish = function() {
this.release();
this.client = null;
this.release = null;
var self = this;
this.finishAction(
this.finalResult.exp_id,
this.finalResult.coin_combination_id,
this.finalResult.scene_id,
this.finalResult.recommendation_style,
this.finalResult.coins
);
// Commit, and then release
this.client.query("COMMIT;", function() {
self.release();
self.client = null;
self.release = null;
self.finishAction(
self.finalResult.exp_id,
self.finalResult.coin_combination_id,
self.finalResult.scene_id,
self.finalResult.recommendation_style,
self.finalResult.coins
);
});
};
/**