How to use q

function parseRuleJson(rules, callback) {
 if (!Array.isArray(rules)) {
  rules = [rules];
 }

 Q.all(rules.map(function(rule) {
  var defer = Q.defer();
  readRuleList(rule, function(data) {
   defer.resolve(data);
  }, true);
  return defer.promise;
 })).spread(callback);
}

dns.lookup(config.host, function(err, ip) {
  if (err) {
   throw err;
  }
  defer.resolve(ip);
 });

function getRuleValue(rules, callback, noBody, charset, isHtml) {
 if (noBody || !rules) {
  return callback();
 }
 if (!Array.isArray(rules)) {
  rules = [rules];
 }

 Q.all(rules.map(function(rule) {
  var defer = Q.defer();
  readRuleList(rule, function(data) {
   defer.resolve(data);
  }, false, charset, isHtml);
  return defer.promise;
 })).spread(callback);
}

Q.fcall(this._handler.CloseSession.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_CloseSession_result({success: result});
   output.writeMessageBegin("CloseSession", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("CloseSession", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

function getFileWriters(files, callback) {
 if (!Array.isArray(files)) {
  files = [files];
 }

 Q.all(files.map(function(file) {
  var defer = Q.defer();
  getFileWriter(file, function(writer) {
   defer.resolve(writer);
  });
  return defer.promise;
 })).spread(callback);
}

Q.fcall(this._handler.CloseOperation.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_CloseOperation_result({success: result});
   output.writeMessageBegin("CloseOperation", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("CloseOperation", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetPrimaryKeys.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetPrimaryKeys_result({success: result});
   output.writeMessageBegin("GetPrimaryKeys", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetPrimaryKeys", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetOperationStatus.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetOperationStatus_result({success: result});
   output.writeMessageBegin("GetOperationStatus", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetOperationStatus", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetResultSetMetadata.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetResultSetMetadata_result({success: result});
   output.writeMessageBegin("GetResultSetMetadata", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetResultSetMetadata", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.FetchResults.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_FetchResults_result({success: result});
   output.writeMessageBegin("FetchResults", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("FetchResults", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetTypeInfo.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetTypeInfo_result({success: result});
   output.writeMessageBegin("GetTypeInfo", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetTypeInfo", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetTables.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetTables_result({success: result});
   output.writeMessageBegin("GetTables", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetTables", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetColumns.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetColumns_result({success: result});
   output.writeMessageBegin("GetColumns", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetColumns", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.CloseSession.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_CloseSession_result({success: result});
   output.writeMessageBegin("CloseSession", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("CloseSession", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });

Q.fcall(this._handler.GetResultSetMetadata.bind(this._handler),
   args.req
  ).then(function(result) {
   var result_obj = new TCLIService_GetResultSetMetadata_result({success: result});
   output.writeMessageBegin("GetResultSetMetadata", Thrift.MessageType.REPLY, seqid);
   result_obj.write(output);
   output.writeMessageEnd();
   output.flush();
  }).catch(function (err) {
   var result;
   result = new Thrift.TApplicationException(Thrift.TApplicationExceptionType.UNKNOWN, err.message);
   output.writeMessageBegin("GetResultSetMetadata", Thrift.MessageType.EXCEPTION, seqid);
   result.write(output);
   output.writeMessageEnd();
   output.flush();
  });