fixed cramer

1 files changed, 177 insertions, 0 deletions

diff --git a/task.rb b/task.rb
new file mode 100644
index 0000000..295e580
--- /dev/null
+++ b/task.rb
@@ -0,0 +1,177 @@
+DEFAULT_TASK_MAX_DURATION = 36000
+module OpenTox
+
+  # Class for handling asynchronous tasks
+  class Task
+
+    attr_accessor :pid, :observer_pid
+
+    def metadata
+      super true # always update metadata
+    end
+
+    def self.task_uri
+      Task.new.uri
+    end
+
+    def self.run(description, creator=nil, uri=nil)
+
+      task = Task.new uri
+      #task[RDF::OT.created_at] = DateTime.now
+      #task[RDF::OT.hasStatus] = "Running"
+      #task[RDF::DC.description] = description.to_s
+      #task[RDF::DC.creator] = creator.to_s
+      #task[RDF::OT.percentageCompleted] = "0"
+      #task.put
+      pid = fork do
+        begin
+          #task.completed yield
+        rescue => e
+          # wrap non-opentox-errors first
+          #e = OpenTox::Error.new(500,e.message,nil,e.backtrace) unless e.is_a?(OpenTox::Error)
+          #$logger.error "error in task #{task.uri} created by #{creator}" # creator is not logged because error is logged when thrown
+          #RestClientWrapper.put(File.join(task.uri,'Error'),{:errorReport => e.to_ntriples},{:content_type => 'text/plain'})
+          #task.kill
+        end
+      end
+      Process.detach(pid)
+      #task.pid = pid
+
+      # watch if task has been cancelled 
+      #observer_pid = fork do
+      #  task.wait
+      #  begin
+      #    Process.kill(9,task.pid) if task.cancelled?
+      #  rescue
+      #    $logger.warn "Could not kill process of task #{task.uri}, pid: #{task.pid}"
+      #  end
+      #end
+      #Process.detach(observer_pid)
+      #task.observer_pid = observer_pid
+      #task
+      pid
+
+    end
+
+    def kill
+      Process.kill(9,@pid)
+      Process.kill(9,@observer_pid)
+    rescue # no need to raise an exception if processes are not running
+    end
+
+    def description
+      self.[](RDF::DC.description)
+    end
+
+    def creator
+      self.[](RDF::DC.creator)
+    end
+    
+    def cancel
+      kill
+      self.[]=(RDF::OT.hasStatus, "Cancelled")
+      self.[]=(RDF::OT.finished_at, DateTime.now)
+      put
+    end
+
+    def completed(uri)
+      self.[]=(RDF::OT.resultURI, uri)
+      self.[]=(RDF::OT.hasStatus, "Completed")
+      self.[]=(RDF::OT.finished_at, DateTime.now)
+      self.[]=(RDF::OT.percentageCompleted, "100")
+      put
+    end
+
+    # waits for a task, unless time exceeds or state is no longer running
+    def wait
+      start_time = Time.new
+      due_to_time = start_time + DEFAULT_TASK_MAX_DURATION
+      dur = 0.2
+      while running? 
+        sleep dur
+        dur = [[(Time.new - start_time)/20.0,0.3].max,300.0].min
+        request_timeout_error "max wait time exceeded ("+DEFAULT_TASK_MAX_DURATION.to_s+"sec), task: '"+@uri.to_s+"'" if (Time.new > due_to_time)
+      end
+    end
+
+  end
+
+  def code
+    RestClientWrapper.get(@uri).code.to_i
+  end
+
+  # get only header for status requests
+  def running?
+    code == 202 
+  end
+
+  def cancelled?
+    code == 503
+  end
+
+  def completed?
+    code == 200
+  end
+
+  def error?
+    code >= 400 and code != 503
+  end
+
+  [:hasStatus, :resultURI, :created_at, :finished_at, :percentageCompleted].each do |method|
+    define_method method do
+      response = self.[](RDF::OT[method])
+      response = self.[](RDF::OT1[method]) unless response  # API 1.1 compatibility
+      response
+    end
+  end
+
+  # Check status of a task
+  # @return [String] Status
+  def status
+    self[RDF::OT.hasStatus]
+  end
+
+  def error_report
+    get
+    report = {}
+    query = RDF::Query.new({
+      :report => {
+        RDF.type  => RDF::OT.ErrorReport,
+        :property => :value,
+      }
+    })
+    query.execute(@rdf).each do |solution|
+      report[solution.property] = solution.value.to_s
+    end
+    report
+  end
+
+  #TODO: subtasks (only for progress in validation)
+  class SubTask
+    
+    def initialize(task, min, max)
+      #TODO add subtask code
+    end
+
+    def self.create(task, min, max)
+      if task
+        SubTask.new(task, min, max)
+      else
+        nil
+      end
+    end
+    
+    def waiting_for(task_uri)
+      #TODO add subtask code
+    end
+    
+    def progress(pct)
+      #TODO add subtask code
+    end
+    
+    def running?()
+      #TODO add subtask code
+    end
+  end
+
+end