Class: UCEngine
- Inherits:
-
Object
- Object
- UCEngine
- Defined in:
- lib/ucengine.rb
Overview
This class is the main and only class in ucengine.rb, it handles connections and request to the UCEngine server.
uce = UCEngine.new("localhost", 4567)
uce.connect("[email protected]", :password => 'pwd') do |uce|
uce.subscribe([], :type => 'chat.message.new', :search => 'HTML5') do |event|
uce.publish(:location => event['location']
:from => 'bot',
:type => 'chat.message.new',
:metadata => {"text" => "Hey, you were talking about HTML5"})
end
end
Constant Summary collapse
- DEBUG =
Print every request and everything above.
0
- WARNING =
Print everything that seems fishy.
1
- ERROR =
Print regular errors, usually HTTP errors.
2
- CRITICAL =
Only print critical errors (bad hostname or port, etc).
3
- QUIET =
Don’t print anything (default).
4
- API_ROOT =
"/api"
- API_VERSION =
"0.3"
Instance Attribute Summary collapse
-
#connected ⇒ Object
readonly
Returns the value of attribute connected.
-
#sid ⇒ Object
readonly
Returns the value of attribute sid.
-
#uid ⇒ Object
readonly
Returns the value of attribute uid.
Class Method Summary collapse
-
.load_config(path = "config.yaml") ⇒ Object
Load configuration file (default: config.yaml).
-
.run(name, &proc) ⇒ Object
Run the ucengine server with all the options from the ‘daemons’ gem.
Instance Method Summary collapse
-
#connect(uid, params) {|_self| ... } ⇒ Object
Connect to the UCEngine server with the User ID ‘uid’ and the its credential.
- #connected? ⇒ Boolean
-
#download(location, id) ⇒ Object
Download a file from UCEngine.
-
#initialize(host, port, debug = UCEngine::QUIET) ⇒ UCEngine
constructor
Create a new UCEngine object.
-
#publish(event) ⇒ Object
Publish an event.
-
#subscribe(location, params = {}) ⇒ Object
Subscribe to an event stream.
-
#time ⇒ Object
Return the current timestamp from the server.
-
#upload(location, file) ⇒ Object
Upload a file to UCEngine.
Constructor Details
#initialize(host, port, debug = UCEngine::QUIET) ⇒ UCEngine
Create a new UCEngine object. ‘host’ is the hostname of the UCEngine server and ‘port’ is to TCP port to connect to. Note that this method doesn’t create a new connection, see the #connect method. An additional ‘debug’ parameter set the debug level of the library, all the debug information are written in the error output.
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# File 'lib/ucengine.rb', line 74 def initialize(host, port, debug = UCEngine::QUIET) @host = host @port = port @http = Net::HTTP.new(host, port) @threads = [] @debug = debug debug(UCEngine::DEBUG, "Initialisation complete for #{host}:#{port}.") end |
Instance Attribute Details
#connected ⇒ Object (readonly)
Returns the value of attribute connected.
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# File 'lib/ucengine.rb', line 46 def connected @connected end |
#sid ⇒ Object (readonly)
Returns the value of attribute sid.
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# File 'lib/ucengine.rb', line 46 def sid @sid end |
#uid ⇒ Object (readonly)
Returns the value of attribute uid.
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# File 'lib/ucengine.rb', line 46 def uid @uid end |
Class Method Details
.load_config(path = "config.yaml") ⇒ Object
Load configuration file (default: config.yaml). The returned configuration is a Hash, as returned by YAML.load_file().
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# File 'lib/ucengine.rb', line 50 def UCEngine.load_config(path = "config.yaml") YAML.load_file(path) end |
.run(name, &proc) ⇒ Object
Run the ucengine server with all the options from the ‘daemons’ gem. This function is not mandatory and it is possible to run a UCEngine client without having to run it in background. The ‘name’ parameter is the name you want to give to your brick.
UCEngine.run('test') do
UCEngine.new(...)
...
end
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# File 'lib/ucengine.rb', line 65 def UCEngine.run(name, &proc) Daemons.run_proc(name, &proc) end |
Instance Method Details
#connect(uid, params) {|_self| ... } ⇒ Object
Connect to the UCEngine server with the User ID ‘uid’ and the its credential.
uce = UCEngine.new("localhost", 4567)
uce.connect("bibi", :credential => 'abcd') do |uce|
... your code goes here
end
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# File 'lib/ucengine.rb', line 95 def connect(uid, params) @uid = uid begin response = post("/presence/", {:uid => @uid, :credential => params[:credential]}) @connected = true @sid = response['result'] debug(UCEngine::DEBUG, "Authentification complete for #{@uid}/#{@sid}.") rescue RestClient::Request::Unauthorized debug(UCEngine::DEBUG, "Authentification error for #{@uid}.") @connected = false end yield self if block_given? @threads.each do |thread| begin thread.join rescue => error debug(UCEngine::WARNING, "Thread aborted: #{error}") end end end |
#connected? ⇒ Boolean
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# File 'lib/ucengine.rb', line 83 def connected? @connected end |
#download(location, id) ⇒ Object
Download a file from UCEngine. The location parameter is where the file sits. The ‘id’ parameters is the file idenfication number
uce.download("demo_meeting", "file_43243243253253.pdf")
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# File 'lib/ucengine.rb', line 204 def download(location, id) Net::HTTP.start(@host, @port) do |http| params = Hash.new params[:uid] = @uid if @uid params[:sid] = @sid if @sid url = URI.escape("http://#{@host}:#{@port}#{API_ROOT}/#{API_VERSION}/file/#{location}/#{id}") debug(UCEngine::DEBUG, "Download: #{url}") result = RestClient.get(url, {:params => params}) debug(UCEngine::DEBUG, "Download complete") return result end end |
#publish(event) ⇒ Object
Publish an event. Publishing an event require a few mandatories parameters:
- :location
-
As described in the subscribe method: “meeting” publish the event in a specific meeting or “”: publish the event in the server root.
- :type
-
The type of event to send, the format of this type is usually ‘namespace.object.action’, for example: ‘chat.message.new’, ‘twitter.tweet.new’, ‘internal.user.update’
- :parent
-
The id of the parent, this parameter is useful to build event hierarchy.
- :metadata
-
A hash of freely defined values to append to the event.
uce.publish(:location => "WebWorkersCamp",
:type => 'presentation.slide.add'
:metadata => {:url => 'http://myserver/slides/03.png',
:index => 3})
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# File 'lib/ucengine.rb', line 174 def publish(event) debug(UCEngine::DEBUG, "Publish to #{event[:location]}, type: #{event[:type]}, parent: #{event[:parent]}, metadata: #{event[:metadata]}") params = Hash.new params[:type] = event[:type] params[:parent] = event[:parent] if event[:parent] if event[:metadata] event[:metadata].each_key do |key| params["metadata[#{key}]"] = event[:metadata][key] end end post("/event/#{event[:location]}", params) end |
#subscribe(location, params = {}) ⇒ Object
Subscribe to an event stream. The ‘location’ parameter is where you’re expecting the events to come:
-
“meeting”: events from a specific meeting.
-
“”: all events.
The function takes extra parameters: :type => the type of event (ex. ‘chat.message.new’, ‘internal.user.add’, etc). :from => the origin of the message, the value is an uid. :parent => the id of the the parent event. :search => list of keywords that match the metadata of the returned events
uce.subscribe(["af83"], :type => 'internal.meeting.add', :search => 'HTML5') do |event|
puts "A new meeting about HTML5 was created"
end
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# File 'lib/ucengine.rb', line 131 def subscribe(location, params = {}) debug(UCEngine::DEBUG, "Subscribe to #{location} with #{params}.") @threads << Thread.new do Net::HTTP.start(@host, @port) do |http| params[:_async] = "lp" params[:start] = 0 if !params[:start] while true begin events = get("/event/#{location}", params, http)['result'] rescue RestClient::RequestTimeout debug(UCEngine::WARNING, "Subscribe timeout ... retry") retry rescue EOFError debug(UCEngine::WARNING, "Subscribe closed ... retry") sleep 1 retry rescue => error debug(UCEngine::ERROR, error) sleep 1 retry end next if events == [] events.each do |event| yield event end params[:start] = events[-1]['datetime'] + 1 end end end end |
#time ⇒ Object
Return the current timestamp from the server. The timestamp is expressed in milliseconds from Epoch (january 1st 1970). This function can be useful if you need to search for events from now.
uce.time -> 1240394032
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# File 'lib/ucengine.rb', line 193 def time time = get("/time", Hash.new)['result'].to_i debug(UCEngine::DEBUG, "Fecth timestamp from UCEngine: #{time}") return time end |
#upload(location, file) ⇒ Object
Upload a file to UCEngine. The location is where you want the file to be uploaded. The ‘file’ parameter is a File object. This function returns a JSON structure file_id where ‘file_id’ is the identification number of the file.
uce.upload(["demo_meeting"], File.new("/path/file_to_upload.pdf"))
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# File 'lib/ucengine.rb', line 225 def upload(location, file) url = "http://#{@host}:#{@port}#{API_ROOT}/#{API_VERSION}/file/#{location}?uid=#{@uid}&sid=#{@sid}" debug(UCEngine::DEBUG, "Upload: #{file.path} to #{url}") result = JSON.parse(RestClient.post(url, {:upload => file})) debug(UCEngine::DEBUG, "Upload complete") return result end |