09-07-2016
Writing a REST server to run on FreeBSD -- how to structure for concurrency?
Hi All,
I want to write a domain specific REST/HTTP server to run on FreeBSD. I have control over both the server side and the
primary client intended to consume the service.
My question is:
how do you think it should be designed to support multiple connections, given:
- It will run on a modern x86 chip (I7 6700K) which has 4 cores, each running two threads.
- REST transactions are short-lived, request/response, which are basically HTTP requests (GET, POST, DELETE).
Is fork() too costly for each connection?
Is kqueue the wrong tool, given that the connections are not really long-lived and do not consist of repeated updates/polling?
Should I use a thread approach where I have the master, and then create a new thread for each connection and then terminate the thread after the response is sent back?
I am really at a loss as to what the most effective approach to take is. While it may never be used, I'd at least like to design it to be efficient and capable of supporting as many concurrent connections as possible!
Thanks for any suggestions.
(
I want to write it for multiple reasons: to learn, to challenge myself, to build something minimalistic, because the sun rises, etc. I realize I could just grab and go with an existing web server but I don't want to do that.)
Last edited by rbatte1; 09-14-2016 at 06:10 AM..
Reason: Converted to formatted number-list
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LEARN ABOUT DEBIAN
dancer::plugin::rest
Dancer::Plugin::REST(3pm) User Contributed Perl Documentation Dancer::Plugin::REST(3pm)
NAME
Dancer::Plugin::REST - A plugin for writing RESTful apps with Dancer
SYNOPSYS
package MyWebService;
use Dancer;
use Dancer::Plugin::REST;
prepare_serializer_for_format;
get '/user/:id.:format' => sub {
User->find(params->{id});
};
# curl http://mywebservice/user/42.json
{ "id": 42, "name": "John Foo", email: "john.foo@example.com"}
# curl http://mywebservice/user/42.yml
--
id: 42
name: "John Foo"
email: "john.foo@example.com"
DESCRIPTION
This plugin helps you write a RESTful webservice with Dancer.
KEYWORDS
prepare_serializer_for_format
When this pragma is used, a before filter is set by the plugin to automatically change the serializer when a format is detected in the URI.
That means that each route you define with a :format token will trigger a serializer definition, if the format is known.
This lets you define all the REST actions you like as regular Dancer route handlers, without explicitly handling the outgoing data format.
resource
This keyword lets you declare a resource your application will handle.
resource user =>
get => sub { # return user where id = params->{id} },
create => sub { # create a new user with params->{user} },
delete => sub { # delete user where id = params->{id} },
update => sub { # update user with params->{user} };
# this defines the following routes:
# GET /user/:id
# GET /user/:id.:format
# POST /user
# POST /user.:format
# DELETE /user/:id
# DELETE /user/:id.:format
# PUT /user/:id
# PUT /user/:id.:format
helpers
Some helpers are available. This helper will set an appropriate HTTP status for you.
status_ok
status_ok({users => {...}});
Set the HTTP status to 200
status_created
status_created({users => {...}});
Set the HTTP status to 201
status_accepted
status_accepted({users => {...}});
Set the HTTP status to 202
status_bad_request
status_bad_request("user foo can't be found");
Set the HTTP status to 400. This function as for argument a scalar that will be used under the key error.
status_not_found
status_not_found("users doesn't exists");
Set the HTTP status to 404. This function as for argument a scalar that will be used under the key error.
LICENCE
This module is released under the same terms as Perl itself.
AUTHORS
This module has been written by Alexis Sukrieh "<sukria@sukria.net>" and Franck Cuny.
SEE ALSO
Dancer <http://en.wikipedia.org/wiki/Representational_State_Transfer>
perl v5.14.2 2011-11-01 Dancer::Plugin::REST(3pm)