Module: Redom

Defined in:
lib/redom.rb,
lib/redom/task.rb,
lib/redom/proxy.rb,
lib/redom/utils.rb,
lib/redom/parser.rb,
lib/redom/worker.rb,
lib/redom/runtime.rb,
lib/redom/version.rb,
lib/redom/connection.rb,
lib/redom/dispatcher.rb,
lib/redom/thread_pool.rb

Defined Under Namespace

Modules: Connection, Utils Classes: Dispatcher, Parser, Proxy, Task, ThreadPool, Worker

Constant Summary collapse

DEFAULT_OPTIONS = 
{
  :log => STDOUT,
  :log_level => 'error',
  :worker => 5,
  :buff_size => 200
}
REQ_HANDSHAKE = 
0
REQ_METHOD_INVOCATION = 
1
REQ_PROXY_RESULT = 
2
IDX_REQUEST_TYPE = 
0
IDX_CONNECTION_CLASS =

REQ_HANDSHAKE

1
IDX_CONNECTION_ID =

REQ_METHOD_INVOCATION

1
IDX_METHOD_NAME = 
2
IDX_ARGUMENTS = 
3
IDX_TASK_ID =

REQ_PROXY_RESULT

1
IDX_PROXY_RESULT = 
2
TYPE_UNDEFINED = 
0
TYPE_PROXY = 
1
TYPE_ARRAY = 
2
TYPE_ERROR = 
3
TYPE_METHOD = 
4
T_INFO_METHOD_NAME = 
0
T_INFO_ARGUMENTS = 
1
T_INFO_BLOCK = 
2
P_INFO_OID = 
0
P_INFO_RCVR = 
1
P_INFO_NAME = 
2
P_INFO_ARGS = 
3
VERSION = 
'0.1.2'

Class Method Summary collapse

Class Method Details

.on_close(ws) ⇒ Object 



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# File 'lib/redom.rb', line 87

def on_close(ws)
  @@dispatcher.on_close(ws)
end

.on_error(ws, err) ⇒ Object 



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# File 'lib/redom.rb', line 91

def on_error(ws, err)
  @@dispatcher.on_error(ws, err)
end

.on_message(ws, msg) ⇒ Object 



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# File 'lib/redom.rb', line 83

def on_message(ws, msg)
  @@dispatcher.on_message(ws, msg)
end

.on_open(ws) ⇒ Object 



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# File 'lib/redom.rb', line 79

def on_open(ws)
  @@dispatcher.on_open(ws)
end

.runtime ⇒ Object 



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# File 'lib/redom/runtime.rb', line 3

def runtime
<<EOS
(function() {
  var
  TYPE_UNDEFINED = 0,
  TYPE_PROXY     = 1,
  TYPE_ARRAY     = 2,
  TYPE_ERROR     = 3,
  TYPE_METHOD    = 4,

  REQ_HANDSHAKE         = 0,
  REQ_METHOD_INVOCATION = 1,
  REQ_PROXY_RESULT      = 2,

  P_INFO_OID  = 0,
  P_INFO_RCVR = 1,
  P_INFO_NAME = 2,
  P_INFO_ARGS = 3;

  var connections = {};

  if (window.Opal) {
Opal.$method = function(cid, name) {
  if (Opal.top['$' + name]) {
    return Opal.top['$' + name];
  } else {
    return connections[cid](name);
  }
}

Object.prototype.$djsCall = function(name) {
  if (name == '') {
    return (function(obj) {
      return function(key) {
        return obj[key];
      };
    })(this);
  }

  if (Opal.top[name]) {
    if (typeof Opal.top[name] == 'function') {
      return function() {
        return Opal.top[name].apply(Opal.top, arguments);
      };
    } else {
      return function() {
        return Opal.top[name];
      };
    }
  }
  if (name[0] == "$" && this[name] == null) {
    name = name.substring(1);
  };
  
  if (this[name] != null) {
    if (typeof this[name] == 'function') {
      return (function(obj) {
        return function() {
          return obj[name].apply(obj, arguments);
        };
      })(this);
    } else {
      return (function(obj) {
        return function() {
          return obj[name];
        };
      })(this);
    }
  } else if (window[name]) {
    if (typeof window[name] == 'function') {
      return function() {
        return window[name].apply(window, arguments);
      };
    } else {
      return function() {
        return window[name];
      };
    }
  }
  
  return function() {
    return null;
  };
};
Object.prototype.$djsAssign = function(name) {
  return (function(obj) {
    return function(value) {
      return obj[name] = value;
    };
  })(this);
};
Opal.top.$window = window;
Opal.top.$document = window.document;
Opal.top.$navigator = window.navigator;
Opal.top.$location = window.location;
Opal.top.$history = window.history;
  }

  var Redom = function(server) {
var ws = new WebSocket(server),
  refs = {
    seq: 0,
    hash: {},
    put: function() {
      var key;
      if (arguments.length == 2) {
        key = arguments[0];
        this.hash[key] = arguments[1];
      } else if (arguments.length == 1) {
        key = "R" + (++this.seq);
        this.hash[key] = arguments[0];
      } else {
        console.log("ERROR: wrong number of arguments!");
      }
      return key;
    },
    get: function(key) {
      return this.hash[key];
    }
  },
  tasks = [];

// Initialize refs
refs.put("window", window);
refs.put("document", document);
refs.put("history", history);
refs.put("navigator", navigator);
refs.put("location", location);

// Initialize WebSocket event handlers
function open(connectionClassName) {
  ws.onopen = function() {
    ws.send(serialize([REQ_HANDSHAKE, connectionClassName]));
    console.log("WebSocket opened.");
  };
  ws.onclose = function() {
    console.log("WebSocket closed.");
  };
  ws.onerror = function(error) {
    console.log(error);
  };
  ws.onmessage = function(event) {
    var data = unserialize(event.data);
    var tid = data[0];
    var proxies = data[1];
    var queue = tasks[tid];
    if (!queue) {
      queue = [];
      tasks[tid] = queue;
    }
    for (var i = 0; i < proxies.length; i++) {
      queue.push(proxies[i]);
    }
    try {
      process(tid);
    } catch (e) {
      console.log(e);
    }
  };
};

// Close this WebSocket connection
function close() {
  ws.close();
};

// Serialize JavaScript object into message
function serialize(data) {
  return JSON.stringify(data);
};
// Unserialize message into JavaScript object
function unserialize(msg) {
  return JSON.parse(msg);
};

// Restore arguments
function restore(args) {
  if (args instanceof Array) {
    switch(args[0]) {
    case TYPE_ARRAY:
      for (var i = 0; i < args[1].length; i++) {
        args[1][i] = restore(args[1][i]);
      }
      return args[1];
      break;
    case TYPE_PROXY:
      return refs.get(args[1]);
      break;
    case TYPE_METHOD:
      return (function(cid, name) {
        if (window[name] && typeof(window[name]) == 'function') {
          return function() {
            window[name];
          };
        } else {
          return function() {
            var type, args = [];
            for (var i = 0; i < arguments.length; i++) {
              switch(type = typeOf(arguments[i])) {
                case null:
                  args.push(arguments[i]);
                  break;
                case TYPE_PROXY:
                case TYPE_ARRAY:
                  args.push([type, refs.put(arguments[i])]);
                  break;
              }
            }
            ws.send(serialize([REQ_METHOD_INVOCATION, cid, name, args]));
          }
        }
      })(args[1], args[2]);
      break;
    }
  } else {
    return args;
  }
};

// Evaluation proxies from server
function process(tid) {
  var proxy, oid, name, args, result, type,
    rsps = [],
    queue = tasks[tid];
  while (proxy = queue.shift()) {
    oid = proxy[P_INFO_OID];
    rcvr = refs.get(proxy[P_INFO_RCVR]);
    name = proxy[P_INFO_NAME];
    args = restore(proxy[P_INFO_ARGS]);

    if (rcvr) {
      result = execute(rcvr, name, args);
      if (typeof result == "undefined") {
        rsps.push([oid, [TYPE_UNDEFINED]]);
        ws.send(serialize([REQ_PROXY_RESULT, tid, rsps]));
        return;
      } else {
        refs.put(oid, result);
        switch (type = typeOf(result)) {
          case null:
            rsps.push([oid, result]);
            break;
          case TYPE_PROXY:
          case TYPE_ARRAY:
            rsps.push([oid, [type]]);
            break;
        };
      }
    } else {
      if (name) {
        rsps.push([oid, TYPE_ERROR, "no such object. ID='" + proxy[P_INFO_RCVR] + "'."]);
        ws.send(serialize([REQ_PROXY_RESULT, tid, rsps]));
        return;
      } else {
        connections[args] = (function(ws, cid) {
          return function(name) {
            return function(e) {
              ws.send(serialize([REQ_METHOD_INVOCATION, cid, name, [[TYPE_PROXY, refs.put(e)]]]));
            };
          };
        })(ws, args);
      }
    }
  }
  ws.send(serialize([REQ_PROXY_RESULT, tid, rsps]));
};

// Type of object
function typeOf(obj) {
  switch(typeof obj) {
    case "string":
    case "number":
    case "boolean":
    case "undefined":
      return null;
    case "object":
      if (obj == null) {
        return null;
      } else if (obj instanceof Array) {
        return TYPE_ARRAY;
      } else {
        return TYPE_PROXY;
      }
    case "function":
      return TYPE_METHOD;
  }
  return TYPE_UNDEFINED;
};

// Method invocation
function execute(rcvr, name, args) {
  var result;
  if (name.match(/^(.+)=$/)) {
    name = RegExp.$1;
    if (name == "[]") {
      result = rcvr[args[0]] = args[1];
    } else {
      result = rcvr[name] = args[0];
    }
  } else {
    if (name == "[]") {
      result = rcvr[args[0]];
    } else {
      result = rcvr[name];
      if (typeof result == "function") {
        result = result.apply(rcvr, args);
        result = typeof result == "undefined" ? null : result;
      }
    }
  }
  return result;
};

return {
  getServer: function() {
    return server;
  },

  open: function(connectionClassName) {
    open(connectionClassName);
  },

  close: function() {
    close();
  }
};
  };

  window.Redom = Redom;
})();
EOS
end

.start(opts = {}) ⇒ Object

Start Redom dispatcher

Parameters:

  • opts (Hash) (defaults to: {}) —

    Options



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# File 'lib/redom.rb', line 54

def start(opts = {})
  opts = DEFAULT_OPTIONS.merge(opts)
  logger = Logger.new(opts[:log])
  logger.level = case opts[:log_level].downcase
  when 'fatal'
    Logger::FATAL
  when 'error'
    Logger::ERROR
  when 'warn'
    Logger::WARN
  when 'info'
    Logger::INFO
  when 'debug'
    Logger::DEBUG
  else
    Logger::FATAL
  end
  Utils.logger = logger
  Utils.dispatcher = @@dispatcher = Dispatcher.new(opts)
end

.stop ⇒ Object 



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# File 'lib/redom.rb', line 75

def stop
  @@dispatcher.stop
end