SelfHelp plugin - survey-js

This is a SelfHelpPlugin that is used for Rserve integration

Installation

• Download the code into the plugin folder
• Checkout the latest version
• Execute all .sql script in the DB folder in their version order
• If there is a survey with upload files, the files are store in the DB. Then it should be adjusted the size max_allowed_packet in MYSQL .ini file. The default one is 1MB

Requirements

• SelfHelp v6.3.0+
• Rserve -server

R installation

• sudo apt-get install r-base
• sudo apt-get install r-base-dev # required for installing packages
• for tidyverse: sudo apt-get -y install r-cran-tidyverse

Rserve Installation

install Rserve

install.packages("Rserve") library(Rserve) Rserve(args="--RS-enable-remote --RS-worker-threads=8")

#start process manually R CMD Rserve --vanilla --RS-conf /etc/Rserv.conf

check process

ps aux | grep Rserve

kill process

killall -INT Rserve

install libraries for httr package

sudo apt install libcurl4-openssl-dev sudo apt install libssl-dev install.packages("httr")

Sudo su instal R, instal Rserve

create file sudo vim /etc/Rserv.conf

auth required remote enable plaintext enable pwdfile /etc/Rserve_users.txt

create file with users sudo vim /etc/Rserve_users.txt

stefan 1234 bashev q1w2

create service sudo vim /etc/systemd/system/rserve.service

[Unit] Description=Rserve - R server

[Service] Type=forking ExecStart=/usr/bin/R CMD Rserve --vanilla --RS-conf /etc/Rserv.conf

[Install] WantedBy=default.target

reload the daemon sudo systemctl daemon-reload

Install packages - use this script. The installation on Linux takes time because everything is compiled. This will happen only the first time when is installed

`install_if_missing <- function(package_name) { if (!require(package_name, character.only = TRUE, quietly = TRUE)) { install.packages(package_name, dependencies = TRUE, repos = "https://cran.r-project.org") library(package_name, character.only = TRUE) } }

install_if_missing("tidyverse")`