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Re: [Scribeserver-users] Problems (and solutions :) ) while using Scribe with Ruby
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From: Chandranshu . <cha...@gm...> - 2008-11-24 11:51:49
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Hi Anthony,
I am using the following code to log the messages. I didn't find any
method to create a Log_Entry pair.
The only methods I found were Log, send_Log and recv_Log. There are
other classes called Log_args and Log_result but I'm not sure how I
should be using them. Interestingly, there is the following line in
the Log_args class which is using LogEntry but I don't see where it
can find it:
MESSAGES => {:type => Thrift::Types::LIST, :name => 'messages',
:element => {:type => Thrift::Types::STRUCT, :class => LogEntry}}
Regards
Chandranshu
========= rscribe_cat.rb ===========
# include thrift-generated code
$:.push('../src/gen-rb')
#require 'thrift/transport'
require 'thrift/transport/tsocket'
require 'thrift/protocol/tbinaryprotocol'
require 'thrift/server/tserver'
require '../src/gen-rb/scribe'
begin
socket = Thrift::Socket.new('localhost', 1463)
transport = Thrift::FramedTransport.new(socket)
protocol = Thrift::BinaryProtocol.new(transport)
client = Scribe::Client.new(protocol)
transport.open()
client.Log(ARGV[1]);
transport.close()
rescue Thrift::Exception => tx
print 'Thrift::Exception: ', tx.message, "\\n"
end
============ rscribe_cat.rb ends ============
On Sat, Nov 22, 2008 at 8:09 AM, Anthony Giardullo <an...@fa...> wrote:
> Chandranshu,
>
> Glad to see you figured out many of these issues getting the Ruby code
> generated. I am going to pass on your comments to our Thrift gurus.
>
> Quick question, can you show me how exactly you are calling your rscribe_cat
> script? Are you creating a Log_Entry pair with a category and message?
>
> -Anthony
>
> On 11/21/08 4:15 AM, "Chandranshu ." <cha...@gm...> wrote:
>
> Resending in plain text format:
> I'm trying to use a Ruby Client named rscribe_cat.rb to post messages
> to the scribed server started using the examples/example1.conf file
> that came with the distribution. The file is attached herewith.
>
> I'm summarizing the problems I faced in setting up Scribe for Ruby:
>
> 1. Edit the <SCRIBE_BASE>/src/Makefile.in. Replace the following line
>
> $(eval $(call thrift_template,.,$(srcdir)/../if/scribe.thrift,
> -I $(thrift_home)/share/ -I $(fb303_home)/share/ --cpp --py --php))
>
> with
>
> $(eval $(call thrift_template,.,$(srcdir)/../if/scribe.thrift,
> -I $(thrift_home)/share/ -I $(fb303_home)/share/ --cpp --py --php
> --gen rb))
>
> 2. Now run the following command from <SCRIBE_BASE> again:
>
> sudo make install
>
> Verify that a gen_rb folder has been created in the
> <SCRIBE_BASE>/src directory and it contains the scribe.rb file. This
> file contains the ruby module that'll enable us to use it from inside
> ruby code. Also, add this path to $: in your Ruby Client.
> 3. However, the generated module contains the module name as scribe
> and trying to use it will result in Ruby complaining that
>
> ../src/gen-rb/scribe.rb:12: class/module name must be CONSTANT
> (SyntaxError)
>
> The leading ".." is because I was writing the ruby client in the
> examples directory. Open the "../src/gen-rb/scribe.rb" file and change
> the module name to be Scribe with a capital 'S'.
> 4. The next error you'll get is:
>
> ../src/gen-rb/scribe.rb:9:in `require': no such file to load
> -- FacebookService (LoadError)
>
> This is because when installing fb303, ruby classes were left
> out again. Generate the ruby classes for the fb303 service interface
> from the <FB303_BASE> directory:
>
> sudo thrift -o /usr/local/share -I /usr/local/share --gen rb
> if/fb303.thrift
>
> Unfortunately, ruby files in /usr/local/share are not picked up
> Ruby by default. So, you'll have to manually copy over the files to
> /usr/local/lib/site_ruby/1.8/ or the corresponding directory on your
> machine.
> 5. The next error is the one that consumed most of my time:
>
> /usr/local/lib/site_ruby/1.8/fb303_types.rb:8:in `require': no
> such file to load --
> /usr/local/lib/site_ruby/1.8/reflection_limited_types
>
> Looking at the code, I found that it was using
> File.dirname(FILE) to load the reflection_limited_types file. Bad for
> me. After a huge updatedb call, I was able to locate the corresponding
> thrift file. Use the following to remedy this:
>
> sudo thrift -o /usr/local/lib/site_ruby/1.8 --gen rb
> /usr/local/share/thrift/if/reflection_limited.thrift
>
> and then copy out the files from the gen-rb directory to the
> /usr/local/lib/site_ruby/1.8 directory. After this point, you
> shouldn't get any more syntax errors. Though it'd be great if the ruby
> classes are also generated at the build time for Thrift, fb303 and
> scribe. I think generating the ruby classes for the
> thrift/if/reflection_limited.thrift, <fb303_base>/if/fb303.thrift and
> $(srcdir)/../if/scribe.thrift files and putting them in the right
> place should do.
> 6. What I'm still struggling with:
>
> /usr/local/lib/site_ruby/1.8/thrift/protocol/binaryprotocol.rb:82:in
> `read_message_begin': Missing version identifier
> (Thrift::ProtocolException)
> from /usr/local/lib/site_ruby/1.8/thrift/client.rb:26:in
> `receive_message'
>
> from ../src/gen-rb/scribe.rb:26:in `recv_Log'
> from ../src/gen-rb/scribe.rb:18:in `Log'
> from rscribe_cat:18
>
> If someone has solved this problem or if the developers can guide me
> as to what might be going wrong, I'll try and fix it and post a patch.
>
> Anyways, good framework Guys!!
>
> Thanks and regards,
> Chandranshu
>
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