pacer-titan

[Dave]

Hi,

I just stumbled across Pacer-Titan but I'm having trouble installing it. I understand it's very "Alpha" . I have this in my gemfile:-

gem 'pacer'

gem 'pacer-titan', :git => 'git://github.com/bloudermilk/pacer-titan.git'

Here are the errors I'm getting when running bundle install:- 

Using pacer-titan (0.1.0) from git://github.com/bloudermilk/pacer-titan.git (at master) 

pacer-titan at C:/jruby-1.7.1/lib/ruby/gems/shared/bundler/gems/pacer-titan-9245d0925cf2 did not have a valid gemspec.

This prevents bundler from installing bins or native extensions, but that may not affect its functionality.

The validation message from Rubygems was:

  ["lib/pacer-titan-0.1.0-standalone.jar"] are not files

I'm a relative newbie to Rails so the fix for the errors may be obvious to some but certainly not me. A gemspec file does exist but I don't know what is missing or an alternative way to install it. Any help will be greatly appreciated. 

Thanks,

Dave

[Thomas Efer]

Hi Dave.

I tried to get titan to work in pacer just yesterday. It occured to me that you need to execute "mvn package" somewhere in the gem creation/instalaltion process. But the adapter seems to be outdated anyways.

I did a liitle bit of research and at obviously the effort needed for pacer-adapters has decreased with this commit: https://github.com/pangloss/pacer/commit/2d7a224f0423b04a58ec4c2838164da9ffcb80fc (also one of the sources of adapter incompatibility to pacer-titan)

So here is a (somehow?) working example I created for titan integration (by modifying existing adapter's code) - maybe it is helpful for you, too:

require "pacer"

Dir["titan-0.1.0/lib/\*.jar"].each { |jar| require jar }

module Pacer

  class << self

def titan path

 path = File.expand_path path

 open = proc do

graph = Pacer.open_graphs[path]

unless graph

 graph = Java::ComThinkaureliusTitanCore::TitanFactory.open path

 Pacer.open_graphs[path] = graph

end

graph

 end

 shutdown = proc do |g|

g.blueprints_graph.shutdown

Pacer.open_graphs.delete path

 end

 PacerGraph.new(Pacer::SimpleEncoder, open, shutdown)

end

  end

end

g = Pacer.titan "/disk/tmp/titanpacer1"

Greetings

Thomas

[David Colebatch]

Hi Thomas,

This is great - and yep, adapters did get a whole lot simpler once Darrick added the very-thin PacerGraph wrapper.

We haven't gotten around to creating a pacer-titan gem as we haven't used it ourselves yet, maybe we can put this in a gist for now and add it to the wiki...

Regards,

David

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