AI Convergence

// build.gradle 파일 

task helloworld << {

  println 'hello dowon'

}

$ git config --global alias.last 'log -l HEAD'

$ git last

commit 329db048ff7af2d417588e28da50a6c53fb1bd84

Author: Yun DoWon <ysyun@yuwin.co.kr>

Date:   Thu Dec 27 11:07:26 2012 +0900

    add content in build.gradle

commit f856853c5b0ac53483f9d14fe1b3ec6ef0fdbca7

Author: 윤도원 (영식) <ysyun@yuwin.co.kr>

Date:   Thu Dec 27 11:01:23 2012 +0900

    Update build.gradle

commit 03ca40a6026b9144f15cc8988ad6539049d36486

Author: 윤도원 (영식) <ysyun@yuwin.co.kr>

Date:   Wed Dec 26 17:55:01 2012 -0800

    Create build.gradle

[alias]

git config --global alias.st status

git config --global alias.co checkout

git config --global alias.ci commit

git config --global alias.br branch

git config --global alias.unstage 'reset HEAD --'

git config --global alias.cs "commit -s"

git config --global alias.last 'log -1 HEAD'

git config --global alias.visual '!gitk'

$ git tag -a v1.1 -m 'pro git version 1.1'

$ git tag

v1.1

$ git show v1.1

tag v1.1

Tagger: Yun DoWon <ysyun@yuwin.co.kr>

Date:   Tue Jan 8 19:40:20 2013 +0900

pro git version 1.1

commit 329db048ff7af2d417588e28da50a6c53fb1bd84

Author: Yun DoWon <ysyun@yuwin.co.kr>

Date:   Thu Dec 27 11:07:26 2012 +0900

    add content in build.gradle

$ git tag v1.1w

$ git tag

v1.1

v1.1w

// 단순히 커밋 정보만 보여준다

$ git show

commit 329db048ff7af2d417588e28da50a6c53fb1bd84

Author: Yun DoWon <ysyun@yuwin.co.kr>

Date:   Thu Dec 27 11:07:26 2012 +0900

    add content in build.gradle

 $ git tag -v v1.1

object 329db048ff7af2d417588e28da50a6c53fb1bd84

type commit

tag v1.1

tagger Yun DoWon <ysyun@yuwin.co.kr> 1357641620 +0900

pro git version 1.1

error: no signature found

error: could not verify the tag 'v1.1'

$ git log --pretty=oneline

329db048ff7af2d417588e28da50a6c53fb1bd84 add content in build.gradle

f856853c5b0ac53483f9d14fe1b3ec6ef0fdbca7 Update build.gradle

03ca40a6026b9144f15cc8988ad6539049d36486 Create build.gradle

49c657f59b787b0ee8409782cd1d5ff16b78033d Initial commit

// 메시지를 -m을 넣지 않으면 하기와 같이 오류 발생함

$ git tag -a v1.2 03ca40a

fatal: no tag message?

$ git tag -a v1.0.1 03ca40a -m 'v1.0.1'

$ git tag

v1.0.1

v1.1

v1.1w

$ git show v1.0.1

tag v1.0.1

Tagger: Yun DoWon <ysyun@yuwin.co.kr>

Date:   Tue Jan 8 19:57:06 2013 +0900

v1.0.1

commit 03ca40a6026b9144f15cc8988ad6539049d36486

Author: 윤도원 (영식) <ysyun@yuwin.co.kr>

Date:   Wed Dec 26 17:55:01 2012 -0800

    Create build.gradle

$ git push origin v1.1

Username for 'https://github.com':

Password for 'https://ysyun@yuwin.co.kr@github.com':

Counting objects: 1, done.

Writing objects: 100% (1/1), 169 bytes, done.

Total 1 (delta 0), reused 0 (delta 0)

To https://github.com/ysyun/pro_git.git

 * [new tag]         v1.1 -> v1.1

$ git push origin --tags

Username for 'https://github.com':

Password for 'https://ysyun@yuwin.co.kr@github.com':

Counting objects: 1, done.

Writing objects: 100% (1/1), 159 bytes, done.

Total 1 (delta 0), reused 0 (delta 0)

To https://github.com/ysyun/pro_git.git

 * [new tag]         v1.0.1 -> v1.0.1

 * [new tag]         v1.1w -> v1.1w

java -jar ./jenkins.war

/**

* Module dependencies.

*/

var express = require('express')

, routes = require('./routes');

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

mongoose.connect('mongodb://localhost/mydb');

var UserSchema = new Schema({ // MVC controller

age : Number,

name: String,

sex: Boolean

});

var UserModel = mongoose.model('users', UserSchema); // Model ---> collection

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){

app.set('views', __dirname + '/views');

app.set('view engine', 'jade');

app.use(express.bodyParser());

app.use(express.methodOverride());

app.use(app.router);

app.use(express.static(__dirname + '/public'));

});

app.configure('development', function(){

app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));

});

app.configure('production', function(){

app.use(express.errorHandler());

});

// Routes

app.get('/', routes.index);

app.param('name', function (req, res, next, name) {

UserModel.find({ name: name }, function (err, docs) {

req.user = docs[0];

next();

});

});

app.get('/users/:name', function (req, res) {

// res.json({ user: req.user });

res.render('./show',{ title: 'Express User',user: req.user });

});

app.get('/users/:name/edit', function (req, res) {

res.render('./edit',{ title: 'Express User',user: req.user });

});

app.get('/users', function (req, res) {

// res.json({ user: req.user });

UserModel.find({},function(err,docs) {

res.render('./users', { title: 'Express User', users: docs });

});

});

app.get('/user/new', function (req, res) {

res.render('new',{layout:false}); //,user:{name:'',age:0,sex:false}}); //,{ title: 'Express User'});

});

app.del('/users/:name', function (req, res) {

UserModel.remove({ name: req.params.name }, function (err) {

res.redirect('/users');

});

});

app.post('/users', function (req, res) {

var b = req.body;

new UserModel({

name: b.name,

age: b.age,

sex:b.sex

}).save(function (err, user) {

if (err) res.json(err);

res.redirect('/users/' + user.name);

});

});

app.put('/users/:name/edit', function (req, res) {

var b = req.body;

UserModel.update(

{ name: req.params.name },

{ name: b.name, age: b.age, sex: b.sex },

function (err) {

res.redirect('/users/' + b.name);

}

);

});

app.listen(process.env.port || 3000);

console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);

h1 Edit User

form(method='POST', action('/users/#{user.name}'))

input(type='hidden',name='_method',value='PUT')

p Name:

input#name(type='text', name='name', value='#{user.name}')

p Age:

input#age(type='number', name='age', value='#{user.age}')

p Sex:

input#sex(type='boolean', name='sex', value='#{user.sex}')

p

button(type='submit') Update

h1 New User

form(method='POST', action= '/users')

p Name:

input#name(type='text',name='name')

p Age:

input#age(type='number',name='age')

p Sex:

input#sex(type='boolean',name='sex')

p 

button(type='submit') Create

h1 #{user.name}

ul

li Age: #{user.age}

li Sex: #{user.sex}

ul

li: a(href='/users/#{user.name}/edit') Edit

li

form(action='/users/#{user.name}' , method='POST')

input(type='hidden',name='_method',value='DELETE')

button(type='submit') Delete

h1 All Users

ul

each user in users

li: a(href='/users/#{user.name}') #{user.name} #{user.age} #{user.sex}

$ ./mongod --shardsvr --dbpath /home/dowon/MongoDB/sdb01 --port 10000

Fri Jan  4 22:25:03 

Fri Jan  4 22:25:03 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.

.. 중략 ...

Fri Jan  4 22:25:03 [initandlisten] build info: Linux domU-12-31-39-01-70-B4 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49

Fri Jan  4 22:25:03 [initandlisten] options: { dbpath: "/home/dowon/MongoDB/sdb01", port: 10000, shardsvr: true }

Fri Jan  4 22:25:03 [websvr] admin web console waiting for connections on port 11000

$ ./mongo

MongoDB shell version: 2.2.2

connecting to: test

mongos> use admin

switched to db admin

mongos> db

admin

mongos> show dbs

config 0.046875GB

////////////////////////////////

// 10000 port mongodb로 들어가자

// 이것은 10000 port의 mongodb로 direct 들어가는 것이다. 

$ ./mongo localhost:10000

MongoDB shell version: 2.2.2

connecting to: localhost:10000/test

> show dbs

local (empty)

testShard 0.0625GB

> use testShard

switched to db testShard

> db

testShard

> show collections

people

system.indexes

> db.people.find();

{ "_id" : 1, "age" : 11, "name" : "dowon1", "sex" : false }

{ "_id" : 2, "age" : 22, "name" : "dowon2", "sex" : true }

{ "_id" : 3, "age" : 33, "name" : "dowon3", "sex" : false }

$ ./mongod -dbpath /home/dowon/MongoDB/db01 --master &

만일 db가 비정상 종료되었다면 

$ ./mongod -dbpath /home/dowon/MongoDB/db01 --master --repair &

수행후에 다시 $ ./mongod -dbpath /home/dowon/MongoDB/db01 --master & 를 수행한다. 

... 하기 메세지 나오면 정상 부팅

Fri Jan  4 19:29:59 [initandlisten] Unable to check for journal files due to: boost::filesystem::basic_directory_iterator constructor: No such file or directory: "/home/dowon/MongoDB/db01/journal"

Fri Jan  4 19:29:59 [initandlisten] waiting for connections on port 27017

Fri Jan  4 19:29:59 [websvr] admin web console waiting for connections on port 28017

$ ./mongod --dbpath /home/dowon/MongoDB/db02 --port 27018 --slave --source localhost:27017 &

...

Fri Jan  4 19:12:46 [initandlisten] Unable to check for journal files due to: boost::filesystem::basic_directory_iterator constructor: No such file or directory: "/home/dowon/MongoDB/db02/journal"

Fri Jan  4 19:12:46 [initandlisten] waiting for connections on port 27018   <-- 정상 부팅

Fri Jan  4 19:12:46 [websvr] admin web console waiting for connections on port 28018

// 하기 메세지는 master에 있는 데이터 파일을 slave로 복사해 온다. 마치 git의 pull과 유사한 느낌 ^^ 

Fri Jan  4 19:12:47 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db02/local.ns, size: 16MB,  took 0.001 secs

Fri Jan  4 19:12:48 [FileAllocator] allocating new datafile /home/dowon/MongoDB/db02/local.0, filling with zeroes...

Fri Jan  4 19:12:48 [replslave] build index done.  scanned 0 total records. 0 secs

// db02 디렉토리에 가보면 db01에 있던 데이터베이스 mydb가 copy되어 있는 것을 볼 수 있다. 

Fri Jan  4 19:12:48 [replslave] resync: dropping database mydb

Fri Jan  4 19:12:48 [replslave] resync: cloning database mydb to get an initial copy

Fri Jan  4 19:12:48 [FileAllocator] allocating new datafile /home/dowon/MongoDB/db02/mydb.ns, filling with zeroes...

Fri Jan  4 19:12:48 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db02/mydb.ns, size: 16MB,  took 0.045 secs

Fri Jan  4 19:12:49 [replslave] resync: done with initial clone for db: mydb

Fri Jan  4 19:12:49 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db02/mydb.1, size: 32MB,  took 0.085 secs

//////////////////////////////////////

// Replica Set 을 1개 만든다 

$ ./mongod --replSet dowon01 --port 30000 --dbpath /home/dowon/MongoDB/db11

$ ./mongod --replSet dowon01 --port 40000 --dbpath /home/dowon/MongoDB/db12

$ ./mongod --replSet dowon01 --port 50000 --dbpath /home/dowon/MongoDB/db13

// 하기 환경설정관련 에러가 나온다 (정상 - 아직 환경설정 안했기 때문에 ^^)

... 중략 ...

Fri Jan 25 23:14:06 [rsStart] replSet can't get local.system.replset config from self or any seed (EMPTYCONFIG)

Fri Jan 25 23:14:23 [initandlisten] connection accepted from 127.0.0.1:34440 #1 (1 connection now open)

Fri Jan 25 23:14:26 [rsStart] replSet can't get local.system.replset config from self or any seed (EMPTYCONFIG)

// mongo client 접속 하기

[dowon@localhost mongodb]$ ./mongo localhost:30000

MongoDB shell version: 2.2.2

connecting to: localhost:30000/test

> show dbs

local (empty)

> exit

bye

[dowon@localhost mongodb]$ ./mongo localhost:40000

MongoDB shell version: 2.2.2

connecting to: localhost:40000/test

> show dbs

local (empty)

> exit

bye

[dowon@localhost mongodb]$ ./mongo localhost:50000

MongoDB shell version: 2.2.2

connecting to: localhost:50000/test

> show dbs

local (empty)

///////////////////////////////////////////////////

// PRIMARY + SECONDARY Replica Set 만들기 

[dowon@localhost mongodb]$ ./mongo localhost:30000

MongoDB shell version: 2.2.2

connecting to: localhost:30000/test

> var config={_id:'dowon01', members:[{_id:0, host:30000},

... {_id:1, host:40000}^C

// 환경 객체를 만든다 

> var config={_id:'dowon01', members:[

    {_id:0, host:'localhost:30000'},

    {_id:1, host:'localhost:40000'},

    {_id:2, host:'localhost:50000'}]

  }

// replica set을 초기화 한다. 

> rs.initiate(config);

{

"info" : "Config now saved locally.  Should come online in about a minute.",

"ok" : 1

}

// 3000 port의 메세지를 보면 다음과 같다. 

// 1) config 없을 때 나오는 메세지이다. 

Fri Jan  4 21:20:29 [rsStart] replSet can't get local.system.replset config from self or any seed (EMPTYCONFIG)

Fri Jan  4 21:20:39 [rsStart] replSet can't get local.system.replset config from self or any seed (EMPTYCONFIG)

// 2) rs.initiate를 수행하면 하기와 같은 메세지가 나온다. 

Fri Jan  4 21:20:44 [conn2] replSet replSetInitiate admin command received from client

Fri Jan  4 21:20:44 [conn2] replSet replSetInitiate config object parses ok, 3 members specified

Fri Jan  4 21:20:44 [conn2] replSet replSetInitiate all members seem up

Fri Jan  4 21:20:44 [conn2] ******

Fri Jan  4 21:20:44 [conn2] replSet info saving a newer config version to local.system.replset

Fri Jan  4 21:20:44 [conn2] replSet saveConfigLocally done

Fri Jan  4 21:20:44 [conn2] replSet replSetInitiate config now saved locally.  Should come online in about a minute.

Fri Jan  4 21:20:44 [conn2] command admin.$cmd command: { replSetInitiate: { _id: "dowon01", members: [ { _id: 0.0, host: "localhost:30000" }, { _id: 1.0, host: "localhost:40000" }, { _id: 2.0, host: "localhost:50000" } ] } } ntoreturn:1 keyUpdates:0 locks(micros) W:431969 reslen:112 477ms

Fri Jan  4 21:20:49 [rsStart] replSet I am localhost:30000

Fri Jan  4 21:20:49 [rsStart] replSet STARTUP2

Fri Jan  4 21:20:49 [rsHealthPoll] replSet member localhost:40000 is up

Fri Jan  4 21:20:49 [rsHealthPoll] replSet member localhost:50000 is up

Fri Jan  4 21:20:50 [initandlisten] connection accepted from 127.0.0.1:43880 #3 (2 connections now open)

Fri Jan  4 21:20:50 [rsSync] replSet SECONDARY

[dowon@localhost mongodb]$ ./mongo localhost:40000

MongoDB shell version: 2.2.2

connecting to: localhost:40000/test

... 중략

dowon01:SECONDARY> show collections

Fri Jan  4 21:31:33 uncaught exception: error: { "$err" : "not master and slaveOk=false", "code" : 13435 }

dowon01:SECONDARY> 

// 30000 port mongoDB를 down시키고 4000 port의 mongo client에서 enter를 치면 하기와 같이 primary로 바뀐다. 

dowon01:PRIMARY> 

// Primary 이므로 CRUD가 가능해 진다. 

[dowon@localhost mongodb]$ ls

bsondump      mongodump    mongooplog    mongosniff  THIRD-PARTY-NOTICES

GNU-AGPL-3.0  mongoexport  mongoperf     mongostat

mongo         mongofiles   mongorestore  mongotop

mongod        mongoimport  mongos        README

[dowon@localhost mongodb]$ pwd

/home/dowon/MongoDB/mongodb <- binary files 위치

[dowon@localhost mongodb]$ cd ..

[dowon@localhost MongoDB]$ pwd

/home/dowon/MongoDB

[dowon@localhost MongoDB]$ ls

db01  db02  db03  mongodb  <- 디렉토리들

[dowon@localhost MongoDB]$ 

[dowon@localhost mongodb]$ ./mongod --dbpath /home/dowon/MongoDB/db01 &

[1] 5840

[dowon@localhost mongodb]$ Fri Dec 28 19:39:42 

Fri Dec 28 19:39:42 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.

Fri Dec 28 19:39:42 

Fri Dec 28 19:39:42 [initandlisten] MongoDB starting : pid=5840 port=27017 dbpath=/home/dowon/MongoDB/db01 32-bit host=localhost.localdomain

Fri Dec 28 19:39:42 [initandlisten] 

Fri Dec 28 19:39:42 [initandlisten] ** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data

Fri Dec 28 19:39:42 [initandlisten] **       see http://blog.mongodb.org/post/137788967/32-bit-limitations

Fri Dec 28 19:39:42 [initandlisten] **       with --journal, the limit is lower

Fri Dec 28 19:39:42 [initandlisten] 

Fri Dec 28 19:39:42 [initandlisten] db version v2.2.2, pdfile version 4.5

Fri Dec 28 19:39:42 [initandlisten] git version: d1b43b61a5308c4ad0679d34b262c5af9d664267

Fri Dec 28 19:39:42 [initandlisten] build info: Linux domU-12-31-39-01-70-B4 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49

Fri Dec 28 19:39:42 [initandlisten] options: { dbpath: "/home/dowon/MongoDB/db01" }

Fri Dec 28 19:39:42 [initandlisten] Unable to check for journal files due to: boost::filesystem::basic_directory_iterator constructor: No such file or directory: "/home/dowon/MongoDB/db01/journal"

Fri Dec 28 19:39:42 [websvr] admin web console waiting for connections on port 28017

Fri Dec 28 19:39:42 [initandlisten] waiting for connections on port 27017

[dowon@localhost mongodb]$ ./mongo

MongoDB shell version: 2.2.2

connecting to: test

Fri Dec 28 19:45:29 [initandlisten] connection accepted from 127.0.0.1:44889 #2 (1 connection now open)

> 2+3

5

> 'hello dowon'

hello dowon

> var dowon = function() {

... return 'hi youngsik. what are you doing now?'

... }

> dowon()

hi youngsik. what are you doing now?

> use peopleDB  // 데이터베이스 만들기

switched to db peopleDB

> db // db 명이 peopleDB를 referencing 한다

peopleDB

> show dbs

local (empty)

test (empty)

> db.people.save({age:37, name:'dowon', sex:'male'})  // collection (table) 만들기. JavaScript객체-JSON

Fri Dec 28 19:53:25 [FileAllocator] allocating new datafile /home/dowon/MongoDB/db01/peopleDB.ns, filling with zeroes...

Fri Dec 28 19:53:25 [FileAllocator] creating directory /home/dowon/MongoDB/db01/_tmp

Fri Dec 28 19:53:25 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db01/peopleDB.ns, size: 16MB,  took 0.012 secs

Fri Dec 28 19:53:25 [FileAllocator] allocating new datafile /home/dowon/MongoDB/db01/peopleDB.0, filling with zeroes...

Fri Dec 28 19:53:25 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db01/peopleDB.0, size: 16MB,  took 0.002 secs

Fri Dec 28 19:53:25 [FileAllocator] allocating new datafile /home/dowon/MongoDB/db01/peopleDB.1, filling with zeroes...

Fri Dec 28 19:53:25 [FileAllocator] done allocating datafile /home/dowon/MongoDB/db01/peopleDB.1, size: 32MB,  took 0.001 secs

Fri Dec 28 19:53:25 [conn2] build index peopleDB.people { _id: 1 }

Fri Dec 28 19:53:25 [conn2] build index done.  scanned 0 total records. 0 secs

Fri Dec 28 19:53:25 [conn2] insert peopleDB.people keyUpdates:0 locks(micros) w:201336 200ms

> show dbs  // collection을 만들때 즉, save 할때 데이터베이스가 생성된다 

local (empty)

peopleDB 0.0625GB

test (empty)

> show collections // collections (테이블)보기

people

system.indexes

> db.people.find()

{ "_id" : ObjectId("50de69359db888890e4126da"), "age" : 37, "name" : "dowon", "sex" : "male" }

> var person=[age:22]

Fri Dec 28 19:55:55 SyntaxError: missing ] after element list (shell):1

> var person={age:22};

> db.people.save(person) // 변수로 차기도 가능

> db.people.find()

{ "_id" : ObjectId("50de69359db888890e4126da"), "age" : 37, "name" : "dowon", "sex" : "male" }

{ "_id" : ObjectId("50de6a0e9db888890e4126db"), "age" : 22 }

> db.people.find({age:22})

{ "_id" : ObjectId("50de6a0e9db888890e4126db"), "age" : 22 }

> 

1 : ascending

0 : descending 

> db.people.ensureIndex({age:1});

Fri Dec 28 20:17:20 [conn2] build index peopleDB.people { age: 1.0 }

Fri Dec 28 20:17:20 [conn2] build index done.  scanned 2 total records. 0.002 secs

> db.people.ensureIndex({name:0});

Fri Dec 28 20:17:26 [conn2] build index peopleDB.people { name: 0.0 }

Fri Dec 28 20:17:26 [conn2] build index done.  scanned 2 total records. 0.002 secs

> db.people.getIndexes();

[

{

"v" : 1,

"key" : {

"_id" : 1

},

"ns" : "peopleDB.people",

"name" : "_id_"

},

{

"v" : 1,

"key" : {

"age" : 1

},

"ns" : "peopleDB.people",

"name" : "age_1"

},

{

"v" : 1,

"key" : {

"name" : 0

},

"ns" : "peopleDB.people",

"name" : "name_0"

}

]

> db.people.help()

DBCollection help

db.people.find().help() - show DBCursor help

db.people.count()

db.people.copyTo(newColl) - duplicates collection by copying all documents to newColl; no indexes are copied.

db.people.convertToCapped(maxBytes) - calls {convertToCapped:'people', size:maxBytes}} command

db.people.dataSize()

db.people.distinct( key ) - e.g. db.people.distinct( 'x' )

db.people.drop() drop the collection

db.people.dropIndex(index) - e.g. db.people.dropIndex( "indexName" ) or db.people.dropIndex( { "indexKey" : 1 } )

db.people.dropIndexes()

db.people.ensureIndex(keypattern[,options]) - options is an object with these possible fields: name, unique, dropDups

db.people.reIndex()

db.people.find([query],[fields]) - query is an optional query filter. fields is optional set of fields to return.

                                             e.g. db.people.find( {x:77} , {name:1, x:1} )

db.people.find(...).count()

db.people.find(...).limit(n)

db.people.find(...).skip(n)

db.people.find(...).sort(...)

db.people.findOne([query])

db.people.findAndModify( { update : ... , remove : bool [, query: {}, sort: {}, 'new': false] } )

db.people.getDB() get DB object associated with collection

db.people.getIndexes()

db.people.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } )

db.people.insert(obj)

db.people.mapReduce( mapFunction , reduceFunction , <optional params> )

db.people.remove(query)

db.people.renameCollection( newName , <dropTarget> ) renames the collection.

db.people.runCommand( name , <options> ) runs a db command with the given name where the first param is the collection name

db.people.save(obj)

db.people.stats()

db.people.storageSize() - includes free space allocated to this collection

db.people.totalIndexSize() - size in bytes of all the indexes

db.people.totalSize() - storage allocated for all data and indexes

db.people.update(query, object[, upsert_bool, multi_bool]) - instead of two flags, you can pass an object with fields: upsert, multi

db.people.validate( <full> ) - SLOW

db.people.getShardVersion() - only for use with sharding

db.people.getShardDistribution() - prints statistics about data distribution in the cluster

db.people.getSplitKeysForChunks( <maxChunkSize> ) - calculates split points over all chunks and returns splitter function

// 프로젝트 복제 

$ git clone https://github.com/ysyun/pro_git.git

Cloning into 'pro_git'...

remote: Counting objects: 3, done.

remote: Total 3 (delta 0), reused 0 (delta 0)

Unpacking objects: 100% (3/3), done.

$ cd pro_git

$ git remote

origin

// 같은 프로젝트에 대해서 여러 기여자가 있을 수 있다. 

$ git remote -v  

origin  https://github.com/ysyun/pro_git.git (fetch)

origin  https://github.com/ysyun/pro_git.git (push)

$ git remote -v

dowon   $ (fetch)

dowon   $ (push)

origin  https://github.com/ysyun/pro_git.git (fetch)

origin  https://github.com/ysyun/pro_git.git (push)

// 기존 잘 못 설정된 내역 삭제

$ git remote rm dowon

$ git remote -v

origin  https://github.com/ysyun/pro_git.git (fetch)

origin  https://github.com/ysyun/pro_git.git (push)

// 새로운 remote alias 추가 

$ git remote add dowon  https://github.com/ysyun/pro_git.git

// 확인

$ git remote -v

dowon   https://github.com/ysyun/pro_git.git (fetch)

dowon   https://github.com/ysyun/pro_git.git (push)

origin  https://github.com/ysyun/pro_git.git (fetch)

origin  https://github.com/ysyun/pro_git.git (push)

// 리모트 저장소 이름 변경 

$ git remote rename dowon young

// 확인

$ git remote -v

origin  https://github.com/ysyun/pro_git.git (fetch)

origin  https://github.com/ysyun/pro_git.git (push)

young   https://github.com/ysyun/pro_git.git (fetch)

young   https://github.com/ysyun/pro_git.git (push)

// fetch로 새로 추가한 build.gradle 파일 가져오기 fetch 수행

$ git fetch origin

From https://github.com/ysyun/pro_git

   49c657f..03ca40a  master     -> origin/master

// 못가져옴 

$ ls

README.md

// pull로 새로 추가한 build.gradle 파일 가져오기 fetch 수행

$ git pull origin

Updating 49c657f..03ca40a

Fast-forward

 build.gradle | 3 +++

 1 file changed, 3 insertions(+)

 create mode 100644 build.gradle

// 가져옴 

$ ls -alrt

total 5

drwxr-xr-x   13 yuwonsys Administ     4096 Dec 27 10:45 ..

-rw-r--r--    1 yuwonsys Administ       38 Dec 27 10:45 README.md

-rw-r--r--    1 yuwonsys Administ       37 Dec 27 10:58 build.gradle

drwxr-xr-x   14 yuwonsys Administ     4096 Dec 27 10:58 .git

drwxr-xr-x    5 yuwonsys Administ        0 Dec 27 10:58 .

///////////////////////////////

// 내용확인

$ cat build.gradle

task gzip << {

  println "gzip"

}

// remote에서 build.gradle 내역 수정함 -> fetch로 가져오기 시도 

$ git fetch origin

remote: Counting objects: 5, done.

remote: Compressing objects: 100% (2/2), done.

remote: Total 3 (delta 0), reused 0 (delta 0)

Unpacking objects: 100% (3/3), done.

From https://github.com/ysyun/pro_git

   03ca40a..f856853  master     -> origin/master

// 변경 내역 파일 fetch 못함 

$ cat build.gradle

task gzip << {

  println "gzip"

}

// remote에서 build.gradle 내역 수정함 -> pull로 가져오기 시도 

$ git pull origin

Updating 03ca40a..f856853

Fast-forward

 build.gradle | 1 +

 1 file changed, 1 insertion(+)

// 변경 내역 파일 pull하여 가져왔음 

$ cat build.gradle

task gzip << {

  println "gzip"

  println "ok"

}

// 맨 하단 내역을 로컬에서 추가한다 

$ cat build.gradle

task gzip << {

  println "gzip"

  println "ok"

  println "are you sure?"

}

// 상태를 확인해 보면 modified 상태이므로 Staging Area -> Git Directory로 이동해야 한다 

$ git status

# On branch master

# Changes not staged for commit:

#   (use "git add <file>..." to update what will be committed)

#   (use "git checkout -- <file>..." to discard changes in working directory)

#

#       modified:   build.gradle

#

no changes added to commit (use "git add" and/or "git commit -a")

// -a 옵션으로 Git Directory로 바로 commit 한다

$ git commit -a -m "add content in build.gradle"

[master 329db04] add content in build.gradle

 1 file changed, 1 insertion(+)

// commit 완료 확인

$ git status

# On branch master

# Your branch is ahead of 'origin/master' by 1 commit.

#

nothing to commit, working directory clean

// 변경 내역을 리모트의 master 브랜치로 push 한다 (github 사용시 ID/PWD 입력함)

$ git push origin master

Username for 'https://github.com': ysyun@yuwin.co.kr

Password for 'https://ysyun@yuwin.co.kr@github.com':

Counting objects: 5, done.

Delta compression using up to 2 threads.

Compressing objects: 100% (3/3), done.

Writing objects: 100% (3/3), 345 bytes, done.

Total 3 (delta 0), reused 0 (delta 0)

To https://github.com/ysyun/pro_git.git

   f856853..329db04  master -> master

$ git remote show origin

* remote origin

  Fetch URL: https://github.com/ysyun/pro_git.git

  Push  URL: https://github.com/ysyun/pro_git.git

  HEAD branch: master

  Remote branch: // pull 하여 오는 리모트 브랜치 목록 보여줌

    master tracked

  Local branch configured for 'git pull': // Merge 브랜치를 알려줌

    master merges with remote master

  Local ref configured for 'git push':  // master 브랜치가 master 브랜치로 push 함 

    master pushes to master (up to date)

// collection & closure

def coll = ["groovy", "java", "ruby"]  // javascript처럼 컬렉션을 만들 수 있다

assert  coll instanceof Collection // assert 결과가 true이면 다음 문장으로 계속 수행함 

assert coll instanceof ArrayList

println coll.class

println coll

coll << "perl"  // 추가하기 

println coll

coll[4] = 'python'  // 배열처럼 직접 삽입

println coll

println coll - ['java'] // 값 빼기 

// closure 1

coll.each{  value ->    // 파라미터 명을 value로 설정함 

    println '> ' + value

}

// closure 2

def excite = { word ->

    return "${word}!!"

}

assert 'Dowon!!' == excite('Dowon')

println excite('Dowon')

// key=value의 map 객체를 만듦 

def hash = [name:'yun', 'age':27]

assert hash.getClass() == java.util.LinkedHashMap

println hash

hash.height = 177   // key=value 추가하기 

println hash

hash.put('height', 190)  // put 이용

println hash

// set, get 메소드가 자동으로 만들어 진다. 

// getGenre() 메소드를 재정의한다

class Song {

    def name

    def artist

    def genre

    String toString() {

        "${name}, ${artist}, ${getGenre()}"

    }

    def getGenre() {

        genre.toUpperCase()

    }

}

class SongExample {

    static void main(args) {

       // 생성자는 그루비가 자동으로 생성해 준다 

        Song sng = new Song(name: "tear's heaven", artist: "singer", genre: "rock")

        sng.name = "hi"

        sng.setArtist("dowon")   // set, get 메소드가 이미 있으므로 호출 가능하다 

        println sng

        Song sng2 = new Song()

        // name 지정을 하지 않았으므로 null이다. ?를 하면 null safety 체크한다  

        // 즉 name 이 null 이면 toUpperCase() 를 수행하지 않는다 

        println sng2.name?.toUpperCase()  

    }

}