-
Notifications
You must be signed in to change notification settings - Fork 2k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[api] pseduo-vendor pool until pull request is finalized
- Loading branch information
Showing
4 changed files
with
200 additions
and
8 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,41 @@ | ||
# Pool -- Simple HTTP client pooling | ||
|
||
## Install | ||
|
||
<pre> | ||
npm install pool | ||
</pre> | ||
|
||
## Super simple to use | ||
|
||
Pool has two core usage scenarios: creating a pool and creating a set of pools. Creating a pool is easy: | ||
|
||
<pre> | ||
var pool = require('pool'), | ||
sys = require('sys'), | ||
local = pool.createPool('80', 'localhost'); | ||
|
||
client = local.request('GET', '/', function (request) { | ||
// You can work with the request here just as you would as if it | ||
// was returned from http.createClient | ||
request.on('end', function () { | ||
sys.puts('Request ended'); | ||
}); | ||
}); | ||
</pre> | ||
|
||
Creating a set of pools can be accomplished using a PoolManager: | ||
|
||
<pre> | ||
var pool = require('pool'), | ||
manager = pool.createPoolManager(), | ||
local = manager.getPool('80', 'localhost'); | ||
|
||
client = local.request('GET', '/', function (request) { | ||
// You can work with the request here just as you would as if it | ||
// was returned from http.createClient | ||
request.on('end', function () { | ||
sys.puts('Request ended'); | ||
}); | ||
}); | ||
</pre> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,142 @@ | ||
var sys = require('sys') | ||
, eyes = require('eyes') | ||
, http = require('http') | ||
, events = require('events') | ||
; | ||
|
||
function Pool (port, host, https, credentials) { | ||
this.port = port; | ||
this.host = host; | ||
this.https = https; | ||
this.credentials = credentials; | ||
this.clients = []; | ||
this.pending = []; | ||
this.minClients = 0; | ||
this.maxClients = 8; | ||
}; | ||
|
||
sys.inherits(Pool, events.EventEmitter); | ||
|
||
Pool.prototype.getClient = function (cb) { | ||
for (var i=0;i<this.clients.length;i+=1) { | ||
if (!this.clients[i].busy) { | ||
if (this.clients.length > this.maxClients) { | ||
this.clients[i].end(); | ||
this.clients.splice(i, 1); | ||
i-=1; | ||
} else { | ||
return cb(this.clients[i]); | ||
} | ||
} | ||
} | ||
if (this.clients.length >= this.maxClients) { | ||
this.pending.push(cb); | ||
} else { | ||
var client = http.createClient(this.port, this.host, this.https, this.credentials); | ||
this.clients.push(client); | ||
cb(client); | ||
} | ||
}; | ||
|
||
Pool.prototype.request = function () { | ||
// Argument parsing. This gets a little dicey with the | ||
// differences in defaults | ||
var method, url, headers, callback, args; | ||
var self = this; | ||
args = Array.prototype.slice.call(arguments); | ||
|
||
if (typeof args[args.length - 1] === 'function') { | ||
callback = args.pop(); | ||
} | ||
if (args[0]) method = args[0]; | ||
if (args[1]) url = args[1]; | ||
if (args[2]) headers = args[2]; | ||
|
||
if (!headers) headers = {}; | ||
if (!headers.Connection) headers.Connection = 'keep-alive'; | ||
|
||
self.getClient(function (client) { | ||
var errorListener = function (error) { | ||
client.removeListener("error", errorListener); | ||
|
||
// Remove the client from the available clients since it has errored | ||
self.clients.splice(self.clients.indexOf(client), 1); | ||
|
||
self.emit("error", error); | ||
request.emit("error", error); | ||
}; | ||
|
||
var request = client.request(method, url, headers); | ||
client.on("error", errorListener); | ||
request.on("response", function (response) { | ||
response.on("end", function () { | ||
client.removeListener("error", errorListener); | ||
client.busy = false; | ||
self.onFree(client); | ||
}) | ||
}) | ||
client.busy = true; | ||
callback(request); | ||
}); | ||
}; | ||
|
||
Pool.prototype.onFree = function (client) { | ||
if (this.pending.length > 0) this.pending.shift()(client); | ||
}; | ||
|
||
Pool.prototype.setMinClients = function (num) { | ||
this.minClients = num; | ||
if (this.clients.length < num) { | ||
for (var i=this.clients.length;i<num;i+=1) { | ||
var client = http.createClient(this.port, this.host, this.https, this.credentials); | ||
this.clients.push(client); | ||
this.emit('free', client); | ||
} | ||
} | ||
}; | ||
|
||
Pool.prototype.setMaxClients = function (num) { | ||
this.maxClients = num; | ||
}; | ||
Pool.prototype.end = function () { | ||
this.clients.forEach(function (c) {c.end()}); | ||
}; | ||
|
||
function PoolManager () { | ||
this.pools = {}; | ||
this.pending = []; | ||
this.minClients = 0; | ||
this.maxClients = 8; | ||
}; | ||
|
||
PoolManager.prototype.setMaxClients = function (num) { | ||
this.maxClients = num; | ||
for (i in this.pools) { | ||
this.pools[i].setMaxClients(num); | ||
} | ||
}; | ||
|
||
PoolManager.prototype.setMinClients = function (num) { | ||
this.minClients = num; | ||
for (i in this.pools) { | ||
this.pools[i].setMinClients(num); | ||
} | ||
}; | ||
|
||
PoolManager.prototype.getPool = function (port, host, https, credentials) { | ||
var k = (port+host+https+credentials); | ||
if (!this.pools[k]) { | ||
this.pools[k] = exports.createPool(port, host, https, credentials); | ||
this.pools[k].setMinClients(this.minClients); | ||
this.pools[k].setMaxClients(this.maxClients); | ||
} | ||
return this.pools[k]; | ||
}; | ||
|
||
exports.createPool = function (port, host, https, credentials) { | ||
return new Pool(port, host, https, credentials); | ||
}; | ||
|
||
exports.createPoolManager = function () { | ||
return new PoolManager(); | ||
}; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,14 @@ | ||
{ "name" : "pool" | ||
, "description" : "HTTP client pools." | ||
, "tags" : ["http", "simple", "util", "utility"] | ||
, "version" : "0.4.1" | ||
, "author" : "Mikeal Rogers <mikeal.rogers@gmail.com>" | ||
, "repository" : | ||
{ "type" : "git" | ||
, "url" : "http://github.com/mikeal/node-utils.git" | ||
} | ||
, "bugs" : | ||
{ "web" : "http://github.com/mikeal/node-utils/issues" } | ||
, "engines" : ["node >=0.1.90"] | ||
, "main" : "./main" | ||
} |