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##
## Copyright (C) 2015 Whit Armstrong and Dirk Eddelbuettel and John Laing
##
## This file is part of Rblpapi
##
## Rblpapi is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 2 of the License, or
## (at your option) any later version.
##
## Rblpapi is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Rblpapi. If not, see <http://www.gnu.org/licenses/>.
##' This function connects to the Bloomberg API
##'
##' @title Establish connection to Bloomberg service
##' @param port An integer variable with the connection port. Default
##' to \code{8194L}.
##' @param default A logical indicating whether this connection should
##' be saved as the default, as opposed to returned to the
##' user. Default to \code{TRUE}.
##' @param host A character option with either a machine name that is
##' resolvable by DNS, or an IP address. Defaults to
##' \sQuote{localhost}.
##' @param appName the name of an application that is authorized
##' to connect to bpipe. If this is NULL Rblpapi connects to the
##' Bloomberg API but cannot authenticate with an app name. This requires
##' the user to authenticate with a user uuid.
##' @return In the \code{default=TRUE} case nothing is returned, and
##' this connection is automatically used for all future calls which
##' omit the \code{con} argument. Otherwise a connection object is
##' returned which is required by all the accessor functions in the
##' package.
##' @details For both \code{host} and \code{port} argument, default
##' values can also be specified via \code{\link{options}} using,
##' respectively, the named entries \code{blpHost} and
##' \code{blpConnect}.
##'
##' If an additional option \code{blpAutoConnect} is set to
##' \sQuote{TRUE}, a connection is established in the
##' \code{.onAttach()} function and stored in the package
##' environment. This effectively frees users from having to
##' explicitly create such an object.
##' @author Whit Armstrong and Dirk Eddelbuettel
##' @seealso Many SAPI and bPipe connections require authentication
##' via \code{blpAuthenticate} after \code{blpConnect}.
##' @examples
##' \dontrun{
##' con <- blpConnect() # adjust as needed
##' }
blpConnect <- function(host=getOption("blpHost", "localhost"),
port=getOption("blpPort", 8194L),
default=TRUE,
appName = getOption("blpAppName", NULL)) {
if (storage.mode(port) != "integer") port <- as.integer(port)
if (storage.mode(host) != "character") stop("Host argument must be character.", call.=FALSE)
con <- blpConnect_Impl(host, port, appName)
if (default) .pkgenv$con <- con else return(con)
}
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