Class: RText::Service
- Inherits:
-
Object
- Object
- RText::Service
- Includes:
- MessageHelper
- Defined in:
- lib/rtext/service.rb
Constant Summary collapse
- PortRangeStart =
9001
- PortRangeEnd =
9100
- FlushInterval =
1
Instance Method Summary collapse
-
#initialize(service_provider, options = {}) ⇒ Service
constructor
Creates an RText backend service.
- #message_received(sock, obj) ⇒ Object
- #run ⇒ Object
Methods included from MessageHelper
#each_json_object_string, #escape_all_strings, #extract_message, #serialize_message, #unescape_all_strings
Methods included from JsonInterface
#json_to_object, #object_to_json, set_j2o_converter, set_o2j_converter
Constructor Details
#initialize(service_provider, options = {}) ⇒ Service
Creates an RText backend service. Options:
:timeout
idle time in seconds after which the service will terminate itelf
:logger
a logger object on which the service will write its logging output
:on_startup:
a Proc which is called right after the service has started up
can be used to output version information
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# File 'lib/rtext/service.rb', line 30 def initialize(service_provider, ={}) @service_provider = service_provider @timeout = [:timeout] || 60 @logger = [:logger] @on_startup = [:on_startup] end |
Instance Method Details
#message_received(sock, obj) ⇒ Object
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# File 'lib/rtext/service.rb', line 95 def (sock, obj) if check_request(obj) request_start = Time.now @logger.debug("request: "+obj.inspect) if @logger response = { "type" => "response", "invocation_id" => obj["invocation_id"] } case obj["command"] when "load_model" load_model(sock, obj, response) when "content_complete" content_complete(sock, obj, response) when "link_targets" link_targets(sock, obj, response) when "find_elements" find_elements(sock, obj, response) when "stop" @logger.info("RText service, stopping now (stop requested)") if @logger @stop_requested = true else @logger.warn("unknown command #{obj["command"]}") if @logger response["type"] = "unknown_command_error" response["command"] = obj["command"] end @logger.debug("response: "+truncate_response_for_debug_output(response).inspect) \ if response && @logger send_response(sock, response) @logger.info("request complete (#{Time.now-request_start}s)") end end |
#run ⇒ Object
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# File 'lib/rtext/service.rb', line 37 def run server = create_server puts "RText service, listening on port #{server.addr[1]}" @on_startup.call if @on_startup $stdout.flush last_access_time = Time.now last_flush_time = Time.now @stop_requested = false sockets = [] request_data = {} while !@stop_requested begin sock = server.accept_nonblock sock.sync = true sockets << sock @logger.info "accepted connection" if @logger rescue Errno::EAGAIN, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR, Errno::EWOULDBLOCK rescue Exception => e @logger.warn "unexpected exception during socket accept: #{e.class}" end sockets.dup.each do |sock| data = nil begin data = sock.read_nonblock(100000) rescue Errno::EWOULDBLOCK rescue IOError, EOFError, Errno::ECONNRESET, Errno::ECONNABORTED sock.close request_data[sock] = nil sockets.delete(sock) rescue Exception => e # catch Exception to make sure we don't crash due to unexpected exceptions @logger.warn "unexpected exception during socket read: #{e.class}" sock.close request_data[sock] = nil sockets.delete(sock) end if data last_access_time = Time.now request_data[sock] ||= "" request_data[sock].concat(data) while obj = (request_data[sock]) (sock, obj) end end end IO.select([server] + sockets, [], [], 1) if Time.now > last_access_time + @timeout @logger.info("RText service, stopping now (timeout)") if @logger break end if Time.now > last_flush_time + FlushInterval $stdout.flush last_flush_time = Time.now end end end |