Class: Backnob::Server
- Inherits:
-
Object
- Object
- Backnob::Server
- Includes:
- DRb::DRbUndumped, Singleton
- Defined in:
- lib/backnob/server.rb
Constant Summary collapse
- OPTIONS =
Default options
{:listen => '127.0.0.1:6444'}
- WORKER_KLASSES =
Array of worker classes
[]
Class Method Summary collapse
-
.method_missing(method, *args, &block) ⇒ Object
Pass any calls to class to instance.
Instance Method Summary collapse
-
#add_file(file) ⇒ Object
Add a worker file.
-
#create_worker(name, options = {}) ⇒ Object
Create a new worker.
-
#logger ⇒ Object
Return a default logger for this process.
-
#ping ⇒ Object
Just return true.
-
#register(klass) ⇒ Object
Register a class as a worker.
-
#results(key, hk = nil) ⇒ Object
Get results from a worker.
-
#start(options = {}) ⇒ Object
Start the server.
-
#stop ⇒ Object
Stop the server and all workers If receieved twice then stops even if workers are still running.
-
#update(data) ⇒ Object
Update method for observing workers.
Class Method Details
.method_missing(method, *args, &block) ⇒ Object
Pass any calls to class to instance
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# File 'lib/backnob/server.rb', line 27 def self.method_missing(method, *args, &block) self.instance.__send__(method, *args) end |
Instance Method Details
#add_file(file) ⇒ Object
Add a worker file
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# File 'lib/backnob/server.rb', line 172 def add_file(file) [:workers] ||= [] if File.exists?(file) [:workers].delete(file) [:workers] << file logger.debug "Added worker file #{file}" end [:workers] end |
#create_worker(name, options = {}) ⇒ Object
Create a new worker. Given a name it will find the first class that matches that name. Options hash is passed to the worker. A key is returned which can be used to retrieve the worker results.
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# File 'lib/backnob/server.rb', line 144 def create_worker(name, = {}) load_workers klass = WORKER_KLASSES.detect do |w| w.name =~ /#{name}/i end if klass key = Digest::SHA1.hexdigest(Time.now.to_i.to_s + klass.name) logger.debug "Creating worker #{klass.name} with key #{key}" worker = Slave.new :object => klass.new(key, ) worker.object.add_observer(self) worker.object.start @workers[key] = worker key end end |
#logger ⇒ Object
Return a default logger for this process
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# File 'lib/backnob/server.rb', line 136 def logger @logger ||= Logger.new($stdout) end |
#ping ⇒ Object
Just return true. Used by client to test server is responding
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# File 'lib/backnob/server.rb', line 125 def ping return true end |
#register(klass) ⇒ Object
Register a class as a worker
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# File 'lib/backnob/server.rb', line 166 def register(klass) WORKER_KLASSES.delete(klass) rescue nil WORKER_KLASSES << klass end |
#results(key, hk = nil) ⇒ Object
Get results from a worker. Results are cached if possible
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# File 'lib/backnob/server.rb', line 114 def results(key, hk = nil) results = {} if @results[key] results = @results[key] else results = @workers[key].object.results() rescue {} end (hk ? results[hk] : results) end |
#start(options = {}) ⇒ Object
Start the server
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# File 'lib/backnob/server.rb', line 49 def start( = {}) .symbolize_keys! # Sanitize the options = OPTIONS.merge() .extend(Backnob::Options) .sanitize! if [:path] && File.exists?([:path]) Dir.chdir([:path]) end # Add the workers directory add_file File.dirname(__FILE__) + '/workers' # Set default variables @workers = {} @results = {} @rqueue = Queue.new m = self # Trap TERM and INT signals to run the # stop method Signal.trap("TERM") do m.stop end Signal.trap("INT") do m.stop end DRb.start_service([:listen], m) logger.info "Waiting on #{@options[:listen]}" # This thread now waits for exit, and also # caches results off the results queue. # It also cleans up workers that have quit. while DRb.thread && DRb.thread.alive? sleep 0.25 unless @rqueue.empty? # Unmarshal results data = ::Marshal.load(@rqueue.pop) key = data[0] @results[key] = {} unless @results.has_key?(key) @results[key][data[1]] = data[2] if data[1] == :error logger.debug "Error occurred in worker #{key}" logger.debug data[2].to_s logger.debug data[2].backtrace if data[2].backtrace end if data[1] == :running && data[2] == false @workers[key].shutdown(:quiet => true) @workers.delete(key) end end end end |
#stop ⇒ Object
Stop the server and all workers If receieved twice then stops even if workers are still running
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# File 'lib/backnob/server.rb', line 34 def stop unless true #@stopping @stopping = true logger.info "Waiting for workers to exit" @workers.values.each{|w| w.wait} else logger.info "Forcing workers to exit" @workers.values.each{|w| w.shutdown} end logger.info "Stopping DRb service" DRb.stop_service end |
#update(data) ⇒ Object
Update method for observing workers. This recieved marshalled result data and puts it on the receive queue for caching
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# File 'lib/backnob/server.rb', line 131 def update(data) @rqueue << data end |