similar to: Database Concurrency Without a Web Server?

I''ve actually found a way to make EventMachine listen to events from a serial port, but only by using the pure Ruby version, using Guilliame Pierronnet''s Ruby/SerialPort library. It turned out to be simpler than I thought it would be: require ''serialport'' $eventmachine_library = :pure_ruby require ''eventmachine'' module EventMachine class

I''ve added experiments/core-model-2 to SVN. I think this is pretty clean and satisfactory. Jeff, please have a look and see if you like the placement of timeouts (which are currently unimplemented). Any event now has the possibility of a timeout. To get an application-level timeout, you''d just post an event with a timeout to a nil target. When the timeout expires, the errback

I''m using the current release branch from the repository (version_0) on freebsd 6.1 with ruby 1.8.4. This is the error that is generated when running the code below at the bottom of the message, plus a gdb bt. Sorry no debugging symbols built into ruby but maybe the bt will help anyways. terminate called after throwing an instance of ''std::runtime_error'' what():

Hello, I have been looking at the Ruby/EventMachine. First let me say it look very good. Reactor model with no threads makes for fast reliable server, and I have read about marvelous Twisted framework for Python and am glad to see something similar for Ruby. I am writing network app with Ruby threads now and it very slow, and I try new Ruby 1.9 with native threads that make it much slower.

Hi everyone, If you subclass EventMachine::Connection and call it outside an EventMachine::run event loop, EventMachine crashes! Example: class Put < EventMachine::Connection include EventMachine::Deferrable HOST="localhost" PORT=8080 def self.request(data) EventMachine.connect(HOST, PORT, self) {|c| c.instance_eval { @data = data } } end #

Sorry this is going to be a bit vague, but I''ve noticed something rather odd going on with EventMachine on Linux. I''ve written something uses EventMachine to proxy HTTP to other processes. On OS X, it works great, adding only about 20% extra latency into the connection when proxying versus connecting to the original backend process directly, so a 5ms connection might now take

Hi everyone. Does anyone have any preferences or ideas for an interface for SSL certificates, both client-side and server-side? At present, the only interface is EventMachine::Connection#start_tls, which uses a built-in self-signed cert on the server side. On the cilent side, it accepts any well-formed cert (that is, it doesn''t check that the remote cert is signed by a trusted authority).

Francis, I read in the list archives back that a future EventMachine release will support epoll on Linux (i.e., it''s in the trunk). Better still, is there a possibility that EM will rely on libevent so that it will be architecture independent (i.e. epoll on Linux, kqueue on FreeBSD/Mac OS X, /dev/poll on Solaris)? This is how memcached is implemented, and it would be helpful to be able

Is getsockname (or its equivalent) available to an EM Connection object? I''d like to access the local port number in my client application. --Michael

Hi EM Gurus, I''m hoping someone can shed some light on the following... I''m using a 3rd party (legacy) server that can accept up to 8 simultaneous connections on one port. I''ve been able to make multiple connections to this server from within one call to EventMachine::run {...}. Specificaly, I can access each connection separately using: em_thread = Thread.new do

I occasionally get a fatal error unable to delete epoll event: Bad file descriptor I think the attached patch will fix it. The patch does two things: 1) changes the error we look for from ENOENT to EBADF. It is hard to reproduce this error, but if I change the epoll_ctl line to epoll_ctl(epfd, EPOLL_CTL_DEL, 666, ed->GetEpollEvent()); it does return -1 with errno = EBADF on my Linux 2.6.9

Just thought I''d let you know that your http parser worked great for creating an http protocol handler for Eventmachine. It wouldn''t take that much effort to use Eventmachine for Mongrel, might be worth a shot just to see how it does. A few things would need to be restructered, like HttpRequest where you read the rest of the body, and calling the handler. But it

Short question: is there way to tell EM to actually send data after send_data call? I''m building a file transferring app. I send Mashal.dump''ed metadata first, and then - the file contents (chunked). I found a silly bug: receive_data() gets marshalled metadata and the first chunk of the file in a single variable. Like that: c1.send_data("meta")

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All: I recently wrote an LDAP library for Ruby called Net::LDAP, and I''ve noticed that quite a few people are using it to do authentication and authorization for Rails apps. I know there are several well-done login generators for Rails, but what about people that would rather use a directory? If we were to write a generator for Rails that used LDAP (or A/D) as the backend, would

I made a quick patch to em so it will try to read the key/cert from a file if it exists in the cwd, and if not use the hardcoded default. If I added a function in rubymain.cpp to set the location of the pem file, where in em would be the right place to set it? It should be in the same scope as start_tls I would think. I''m checking for the pem file in InitializeDefaultCredentials().

Hello, I need to generate a unique ID, so far I''ve unit tested this under 100000 iterations and it seems to work : now.to_i.to_s + ''-'' + now.usec.to_s + ''-'' + rand(1000).to_s Is there a better way ? Thanks Notes : 1) without usec, few percents of generated values are not uniques 2) the id generated is a string so the presence of

There appears to be a problem with sending 0-length (UDP) datagrams. I have a little UDP server running on port 1392, and when I execute the following client code the server does not receive anything. However if I change it to data="x", the server receives it just fine. EM::run { conn = EM::open_datagram_socket( "", 0 ) data = "" puts

Hi, Anyone got any cool tricks for converting a Rails site (in this case, a typo installation) from a mysql database to a postgresql database? I''ve got it almost working -- I''m doing a SQL dump from mysql and loading it into postgres. However, mysql does booleans as a tinyint with 0 = false and 1 = true. When I try to import that into a postgres database that expects booleans

Dear Mongrel Users, It appears that Francis still isn''t satisfied with my attempts to apologize and he''s now asked me privately to retract my statements. So, just to be sure he finally gets it: I retract my statements that Francis and his friends are "shady" and "desperate for cash". He is in no way a shady guy, having dealt with this situation with the