/
memdbd
executable file
·102 lines (85 loc) · 2.94 KB
/
memdbd
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#!/usr/bin/env node
// Copyright 2015 rain1017.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License. See the AUTHORS file
// for names of contributors.
'use strict';
var helpContent = '\
MemDB - Distributed transactional in memory database\n\n\
Usage: memdbd [options]\n\
Options:\n\
-c, --conf path Config file path\n\
-s, --shard shardId Start specific shard\n\
-d, --daemon Start as daemon\n\
-h, --help Display this help\n';
if (require.main === module) {
var argv = require('minimist')(process.argv.slice(2));
if(process.argv.length <= 2 || argv.help || argv.h){
console.log(helpContent);
process.exit(0);
}
var confPath = argv.conf || argv.c;
var shardId = argv.shard || argv.s;
if(!shardId){
throw new Error('Please specify shardId with --shard');
}
//Become daemon
if((argv.d || argv.daemon) && !process.env.__parentPid){
process.env.__parentPid = process.pid;
var opts = {
stdio : 'ignore',
env : process.env,
cwd : process.cwd(),
detached : true,
};
var args = [].concat(process.argv);
args.shift(); // shift off node
process.stdout.write('starting ' + shardId + '... ');
var child = require('child_process').spawn(process.execPath, args, opts);
child.on('exit', function(code, signal){
if(code !== 0){
process.stdout.write('failed\n');
process.exit(1);
}
else{
process.exit(0);
}
});
child.unref();
process.on('SIGUSR2', function(){
process.stdout.write('success\n');
process.exit(0);
});
// prevent from exit
process.on('SIGTERM', function(){});
process.on('SIGINT', function(){});
setTimeout(function(){}, 100000000);
return;
}
var config = require('../app/config');
var conf = config.init(confPath, shardId);
var shardConfig = config.shardConfig(shardId);
require('../app/server').start(shardConfig)
.then(function(){
// send signal to parent process
var parentPid = process.env.__parentPid;
if(parentPid){
process.kill(parentPid, 'SIGUSR2');
}
}, function(e){
console.error(e.stack ? e.stack : e);
require('memdb-logger').shutdown(function(){
process.exit(1);
});
});
}