global_session/lib/utils.js

A link between LRU and messaging to peers which may store or cache LRU entries remotely

const ftok = require('ftok')
const fs = require('fs')
const os = require('os')

function fix_path(a_path) {
    let n = a_path.length
    while ( a_path[n-1] === '/' ) {
        a_path = a_path.substr(0,n-1)
        n--
    } 
    return a_path
}


module.exports.fix_path = fix_path


let g_special_files_list = []
function make_process_identifier() {

    let fake_file =process.pid  + '-' + os.hostname()
    fs.writeFileSync(fake_file,"" + Date.now())

    let path = process.cwd() + '/' + fake_file
    g_special_files_list.push(path)
    return ftok(path)
}

module.exports.make_process_identifier = make_process_identifier


function remove_special_files() {
    for ( let afile of g_special_files_list ) {
        fs.unlinkSync(afile)
    }
}

module.exports.remove_special_files = remove_special_files



function conf_loader(conf_path,default_path) {
    if ( (default_path !== undefined) && !conf_path ) {
        conf_path = default_path
    }
    if ( (typeof conf_path === 'string') && (conf_path.length > 0) ) {
        //
        try {
            let conf_str = fs.readFileSync(conf_path)
            let conf_obj = JSON.parse(conf_str)
            return conf_obj
        } catch (e) {
            console.log(e)
            console.log(conf_path)
        }
        //
    }
    return false
}

module.exports.conf_loader = conf_loader