transforms/pid-and-host.js

// Copyright (c) 2015 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

'use strict';

var Entry = require('../entry.js');

module.exports = AddPidAndHost;

function AddPidAndHost(baseMeta) {
    return addPidAndHost;

    function addPidAndHost(entry) {
        var meta = entry.meta || {};

        if (typeof meta === 'object' && !meta._hostname &&
            baseMeta.hostname
        ) {
            meta._hostname = baseMeta.hostname;
        }

        if (typeof meta === 'object' && !meta._pid && baseMeta.pid) {
            meta._pid = baseMeta.pid;
        }

        if (typeof meta === 'object' && !meta._processTitle &&
            baseMeta.processTitle
        ) {
            meta._processTitle = baseMeta.processTitle;
        }

        return new Entry(entry.level, entry.message, entry.meta, entry.path);
    }
}