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Prototype class to reel class #358

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Prototype class to reel class #358

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168 changes: 86 additions & 82 deletions lib/pool.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,104 +4,108 @@
*
***************************************/

function Pool(attach, max, options) {
this.attach = attach;
this.internaldb = []; // connection created by the pool (for destroy)
this.pooldb = []; // available connection in the pool
this.dbinuse = 0; // connection currently in use into the pool
this.max = max || 4;
this.pending = [];
this.options = options;
}

Pool.prototype.get = function(callback) {
var self = this;
self.pending.push(callback);
self.check();
return self;
};
class Pool {

Pool.prototype.check = function() {
constructor(attach, max, options) {
this.attach = attach;
this.internaldb = []; // connection created by the pool (for destroy)
this.pooldb = []; // available connection in the pool
this.dbinuse = 0; // connection currently in use into the pool
this.max = max || 4;
this.pending = [];
this.options = options;
}

var self = this;
if (self.dbinuse >= self.max)
get(callback) {
var self = this;
self.pending.push(callback);
self.check();
return self;
}

var cb = self.pending.shift();
if (!cb)
return self;
self.dbinuse++;
if (self.pooldb.length) {
cb(null, self.pooldb.shift());
} else {
this.attach(self.options, function (err, db) {
if (!err) {
self.internaldb.push(db);
db.on('detach', function () {
// also in pool (could be a twice call to detach)
if (self.pooldb.indexOf(db) !== -1 || self.internaldb.indexOf(db) === -1)
return;
// if not usable don't put in again in the pool and remove reference on it
if (db.connection._isClosed || db.connection._isDetach || db.connection._pooled === false)
self.internaldb.splice(self.internaldb.indexOf(db), 1);
else
self.pooldb.push(db);

if (db.connection._pooled)
self.dbinuse--;
self.check();
});
} else {
// attach fail so not in the pool
self.dbinuse--;
}
check() {

cb(err, db);
});
}
setImmediate(function() {
self.check();
});
var self = this;
if (self.dbinuse >= self.max)
return self;

return self;
};
var cb = self.pending.shift();
if (!cb)
return self;
self.dbinuse++;
if (self.pooldb.length) {
cb(null, self.pooldb.shift());
} else {
this.attach(self.options, function (err, db) {
if (!err) {
self.internaldb.push(db);
db.on('detach', function () {
// also in pool (could be a twice call to detach)
if (self.pooldb.indexOf(db) !== -1 || self.internaldb.indexOf(db) === -1)
return;
// if not usable don't put in again in the pool and remove reference on it
if (db.connection._isClosed || db.connection._isDetach || db.connection._pooled === false)
self.internaldb.splice(self.internaldb.indexOf(db), 1);
else
self.pooldb.push(db);

Pool.prototype.destroy = function(callback) {
var self = this;
if (db.connection._pooled)
self.dbinuse--;
self.check();
});
} else {
// attach fail so not in the pool
self.dbinuse--;
}

var connectionCount = this.internaldb.length;
cb(err, db);
});
}
setImmediate(function() {
self.check();
});

if (connectionCount === 0 && callback) {
callback();
return self;
}

function detachCallback(err) {
if (err) {
if (callback) {
callback(err);
}
return;
}
destroy(callback) {
var self = this;

var connectionCount = this.internaldb.length;

connectionCount--;
if (connectionCount === 0 && callback) {
callback();
}
}

this.internaldb.forEach(function(db) {
if (db.connection._pooled === false) {
detachCallback();
return;
}
// check if the db is not free into the pool otherwise user should manual detach it
var _db_in_pool = self.pooldb.indexOf(db);
if (_db_in_pool !== -1) {
self.pooldb.splice(_db_in_pool, 1);
db.connection._pooled = false;
db.detach(detachCallback);
function detachCallback(err) {
if (err) {
if (callback) {
callback(err);
}
return;
}

connectionCount--;
if (connectionCount === 0 && callback) {
callback();
}
}
});
};

this.internaldb.forEach(function(db) {
if (db.connection._pooled === false) {
detachCallback();
return;
}
// check if the db is not free into the pool otherwise user should manual detach it
var _db_in_pool = self.pooldb.indexOf(db);
if (_db_in_pool !== -1) {
self.pooldb.splice(_db_in_pool, 1);
db.connection._pooled = false;
db.detach(detachCallback);
}
});
}

}

module.exports = Pool;
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