• MUTEX VS. SEMAPHORES – PART 1: SEMAPHORES
• MUTEX VS. SEMAPHORES – PART 2: THE MUTEX
• MUTEX VS. SEMAPHORES – PART 3 (FINAL PART): MUTUAL EXCLUSION PROBLEMS

MUTEX IS NOT THE SAME AS BINARY SEMAPHORES.

Important difference between Mutex and Semaphore.

- Mutex lock is released by the thread which have acquired the lock.

- Semaphore can be released by other threads.

Semaphore is suitable for producer & consumer pattern.

http://imky.egloos.com/2969966

http://www.davidhampgonsalves.com/2011/05/OpenCV-Python-and-Windows-7-setup-in-5-minutes-or-less

http://mitchtech.net/opencv-python/

Prerequisites

Python 2.7 - http://www.python.org/

NumPy(Numerical Python) - http://sourceforge.net/projects/numpy/files/

SciPy - http://sourceforge.net/projects/scipy/files/scipy/

Download openCV with .exe from http://opencv.org

Install it to c:\openCV

1. 시스템이 여러개라 메인시스템을 제외하고 framework library 의 소스가 따로 관리되지 않고 있었음.

2. framework 의 개선이 있어서 작업을 하고 메인시스템 외의 시스템은

decompile 해서 해당 함수 수정하고 다시 compile 해서 jar로 생성 후 반영

위와 같은 작업을 하고 있었는데 decompiler 로 jd-gui를 사용했다. jar 전체를 java 소스로 뽑아주는 기능이 있었기 때문이다.

전체 소스를 비교하면서 작업을 꼼꼼히 하기 위해서 사용했었는데..

문제는 이것.

원 소스 :

public class TestClass {

	public int ceil(int a, int b) {
		return (int) Math.ceil((double)a/(double)b);
	}
}

jd-gui가 de-compile 한 java (BUG!)

public class TestClass
{
  public int ceil(int a, int b)
  {
    return (int)Math.ceil(a/b);
  }
}

jad.exe가 de-compile 한 java

public class TestClass
{

    public TestClass()
    {
    }

    public int ceil(int a, int b)
    {
        return (int)Math.ceil((double)a / (double)b);
    }
}

jd-gui가 명시적 casting을 날려먹음..

결과.. 2, 100 이 파라미터로 넘어가면..

원함수는 1을 리턴했으나, jd-gui를 믿었다면 0을 리턴하게 되므로 로직이 변경됨..

주의하세요 !

There’s some problem, and I still don’t know which one is problem between OAuthConsumer library and tumblr.

OAuthConsumer Library makes authorization header using all parameters and if I include NSData, it may not work correctly.

- OR -

Tumblr doesn’t recognize the authorization header that OAuthConsumer made correct.

Therefore, I makes different approach to upload tumblr.

Step 1. Create OAuthHeader with only string parameters

Step 2. Create another request by using ASIFormDataRequest again and set header directly

here’s code

- (void)exportImage:(NSData *)image message:(NSString *)message withAccount:(Account *)account {

    OAToken *token = [[[OAToken alloc] initWithKey:account.token secret:account.key] autorelease];
    OAConsumer *consumer = [[[OAConsumer alloc] initWithKey:TUMBLR_API_KEY secret:TUMBLR_API_SECRET] autorelease];

    NSString *baseHost = [[account.album stringByReplacingOccurrencesOfString:@"http://" withString:@""]
                          stringByReplacingOccurrencesOfString:@"https://" withString:@""];

    NSString *requestUrl =

    [NSString stringWithFormat:@"http://api.tumblr.com/v2/blog/%@post", baseHost];

    OAMutableURLRequest *request = [[[OAMutableURLRequest alloc] initWithURL:[NSURL URLWithString:requestUrl]
                                                                    consumer:consumer
                                                                       token:token
                                                                       realm:@"http://api.tumblr.com"
                                                           signatureProvider:nil] autorelease];

    [request setHTTPMethod:@"POST"];

    [request setParameters:[NSArray arrayWithObjects:
                            [OARequestParameter requestParameter:@"type" value:@"photo"],
                            [OARequestParameter requestParameter:@"caption" value:message],
                            nil]];
    [request prepare];
    NSString *oAuthHeader = [request valueForHTTPHeaderField:@"Authorization"];
    DLog(@"OAuthHeader : %@", oAuthHeader);

    ASIFormDataRequest *req = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:requestUrl]];

    [req setRequestMethod:@"POST"];
    [req addRequestHeader:@"Authorization" value:oAuthHeader];
    [req addPostValue:@"photo" forKey:@"type"];
    [req addPostValue:message forKey:@"caption"];
    //    [req addPostValue:@"photo.jpg" forKey:@"file"];
    [req addData:image withFileName:@"photo.jpg" andContentType:@"image/jpeg" forKey:@"data"];

    [req startSynchronous];
    int statusCode = [req responseStatusCode];
    DLog(@"sending completed with status code : %d", statusCode);
    DLog(@"RESP : %@", [req responseString]);

    NSData *respData = [req responseData];

    [req release];

    if( statusCode != 201 ) {
        @throw [NSException exceptionWithName:NSLocalizedString(@"Error", @"")
                                       reason:[NSString stringWithFormat:@"status : %d", statusCode]
                                     userInfo:nil];

    }

}

http://stackoverflow.com/questions/769496/ubuntu-noob-rails-install-fails-on-zlib

mod_jk 다운로드 : http://tomcat.apache.org/download-connectors.cgi

httpd.conf

#TOMCAT
LoadModule jk_module /ssw/apps/apache/modules/mod_jk-1.2.31-httpd-2.2.x.so

<IfModule jk_module>
JkWorkersFile /ssw/apps/apache/modules/jk_module/workers.properties
JkShmFile    /ssw/log/apache/mod_jk/mod_jk.shm
JkLogFile    /ssw/log/apache/mod_jk/mod_jk.log
JkLogLevel   trace
JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"
#JkMount /*.jsp worker1
#JkMountCopy On
</IfModule>

httpd-vhosts.conf

<VirtualHost *:80>
ServerAdmin admin@adonsocial.com
DocumentRoot "/ssw/web/docs/dev"
ServerName dev.adonsocial.com
ErrorLog "/ssw/log/apache/docs/dev/error_log"
CustomLog "/ssw/log/apache/docs/dev/access_log" common
JkMount /*.jsp worker1
JkMountCopy On
</VirtualHost>

ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.7-p174.tar.gz

http://rubyforge.org/frs/download.php/69365/rubygems-1.3.6.tgz

( 최신버전으로 1.6.x를 설치해보았으니 rubygem 1.6과 redmine 1.1.2와 호환되지 않는듯

http://rubyforge.org/frs/download.php/74419/redmine-1.1.2.tar.gz

2. ruby

ruby 압축을 풀고
>./configure
>make
>make install

3. rubygems 설치

압축을 풀고

>ruby setup.rb ( 필요한 경우 sudo )

4. Rails 설치

>gem install rake
>gem install rails -v=2.3.5
<code>&gt;gem install rack -v=1.0.1</code>

<code>
</code>

5. Mysql 구성

>mysql -u root mysql -p

mysql> create database redmine character set utf8;
mysql> create user 'redmine'@'localhost' identified by '암호;
mysql> grant all privileges on redmine.* to 'redmine'@'localhost';

<strong>6.Redmine 구성</strong>

>cd /usr/local/
>tar xvfz /usr/local/src/redmine-1.1.2.tar.gz
>cd redmine-1.1.2/
>config/database.yml.example config/database.yml
>nano config/database.yml
   production:
   adapter: mysql
   database: redmine
   host: localhost
   username: redmine
   password:암호
   encoding: utf8

<pre id="aeaoofnhgocdbnbeljkmbjdmhbcokfdb-mousedown">&gt;gem install -v=0.4.2 i18n

>RAILS_ENV=production rake config/initializers/session_store.rb

>apt-get install libmysqlclient15-dev (MySql 4.x 인 경우 libmysqlclient12-dev)
<pre id="aeaoofnhgocdbnbeljkmbjdmhbcokfdb-mousedown">&gt;gem install mysql

>RAILS_ENV=production rake db:migrate

>RAILS_ENV=production rake redmine:load_default_data

>ruby script/server webrick -e production

http://IP:3000/으로 확인

서버 종료시 Ctrl+C 사용

<strong>7. Passenger 사용하여 Rails 프로젝트 Apache에 연결</strong>

 * 참고사이트 : http://srue.net/91

> gem install passenger

  잘 안되는 경우에는 rm -r ~/.gem

> passenger-install-apache2-module

  시키는대로 설치한다.

  apache가 다른 경로에 있는 경우에는 path에 추가 후 실행한다.

> export PATH=/usr/local/apache2/bin:$PATH

  PATH를 지정해도 안되는 경우에 sudo 명령을 사용하지 말고 디렉토리 권한을 변경 후 다시 시도해본다.

  설치가 완료되면 Apache를 어떻게 수정하라고 알려준다. 알려준대로 수정 후 아파치 리스타트

* 가상호스트 없이 접속하는 방법으로

<a href="http://mattconnolly.wordpress.com/2010/09/19/redmine-ruby-on-rails-without-virtual-hosts/">http://mattconnolly.wordpress.com/2010/09/19/redmine-ruby-on-rails-without-virtual-hosts/</a>

를 참조하였으나 뭔가 오류 발생

<div id="_mcePaste">*** Exception SecurityError in spawn manager (Insecure operation - exist?) (process 27151, thread #&lt;Thread:0xb781a1ac&gt;):</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/utils/tmpdir.rb:51:in `exist?'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/utils/tmpdir.rb:51:in `passenger_tmpdir'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/utils/tmpdir.rb:31:in `passenger_tmpdir'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server.rb:119:in `initialize'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/classic_rails/application_spawner.rb:117:in `initialize'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:201:in `new'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:201:in `spawn_rails_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:215:in `call'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:215:in `spawn_rails_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server.rb:357:in `__send__'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'</div>
<div id="_mcePaste">from /usr/local/lib/ruby/gems/1.8/gems/passenger-3.0.5/helper-scripts/passenger-spawn-server:99</div>

아직 원인 해결 못함.. ㅠㅗㅜ

DismissingAlertView.h

//
//  DismissingAlertView.h
//
//  Created by hytgbn on 10. 4. 29..
//  Copyright 2010 hytgbn. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol DismissingAlertViewDelegate 

-(void)onDismissingAlertView:(id)control;

@end

@interface DismissingAlertView : UIAlertView <UIAlertViewDelegate> {
	id<DismissingAlertViewDelegate> dismissingDelegate;
}

@property(nonatomic, assign) id<DismissingAlertViewDelegate> dismissingDelegate;

+ (id)alertWithTitle:(NSString *)title message:(NSString*)msg interval:(NSTimeInterval)ti delegate:(id<DismissingAlertViewDelegate>)obj;
+ (id)alertWithTitle:(NSString *)title message:(NSString*)msg interval:(NSTimeInterval)ti;

@end

DismissingAlertView.m

//
//  DismissingAlertView.m
//
//  Created by hytgbn on 10. 4. 29..
//  Copyright 2010 hytgbn. All rights reserved.
//

#import "DismissingAlertView.h"


@implementation DismissingAlertView

@synthesize dismissingDelegate;

+ (id)alertWithTitle:(NSString *)title message:(NSString*)msg interval:(NSTimeInterval)ti delegate:(id<DismissingAlertViewDelegate>)obj {
	DismissingAlertView *alertView = nil;
	if( alertView = [[super alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:nil otherButtonTitles:nil] ) {
		
		[NSTimer scheduledTimerWithTimeInterval:2 target:alertView selector:@selector(hideUI:) userInfo:nil repeats:NO];
		[alertView setDismissingDelegate:obj];
		[alertView show];
		
	}
	return [alertView autorelease];
}

+ (id)alertWithTitle:(NSString *)title message:(NSString*)msg interval:(NSTimeInterval)ti {
	return [DismissingAlertView alertWithTitle:title message:msg interval:ti delegate:nil];
}

- (void)hideUI:(NSTimer *)timer {
	[self dismissWithClickedButtonIndex:0 animated:NO];	 
	
	if( dismissingDelegate != nil ) {
		[dismissingDelegate onDismissingAlertView:self];
	}
}

@end

Usage :

    [DismissingAlertView alertWithTitle:@"Error" message:@"You got the error!" interval:3.0];

Also you can get dismissing event.
self implements DismissingAlertViewDelegate

    [DismissingAlertView alertWithTitle:@"Error" message:@"You got the error!" interval:3.0 delegate:self];

xcode 3.2.5를 다운로드 하려다가

거대한 용량 3.5G와… 지긋지긋한 속도때문에;; 당췌 다운로드가 되질 않았다.

속도가 나올때는 괜찮았는데 느려서 그런지 몇시간씩 다운로드 걸고 있으면 에러가 나있기도 하고

wget 을 쓸 순 없을까.. 하는 생각에 찾아보니

cookie를 이용한 방법을 찾았다. ( http://omegadelta.net/2010/11/24/downloading-ios-iphone-sdks-on-bad-connections/ )

firefox에서 Cookie Exporter라는 add-on을 설치하면 현재 브라우저의 쿠키를 파일로 저장해준다.

아래와 같이 하면 쿠키파일을 이용해서 로그인 상태로 받을 수 있다.

 wget --server-response --continue --no-check-certificate --load-cookies=cookies.txt [다운로드경로]

nohup등을 이용하면 더욱 편리하게 받을 수 있다.

이렇게 하면