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  • Google I/O 2010 - iGoogle developer portal and tools

    Google I/O 2010 - iGoogle developer portal and tools Google I/O 2010 - iGoogle developer portal and tools Social Web 201 Shih-chia Cheng, Albert Cheng Learn how to build and maintain better OpenSocial gadgets for iGoogle. Two major applications will be introduced. The first one is iGoogle Gadget Dashboard for managing gadgets created by you. The second one is OSDE (OpenSocial Development Environment) which is an Eclipse plugin for developers to easily implement gadgets. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 4 0 ratings Time: 44:02 More in Science & Technology

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  • What encoding I should use in editor (NetBeans), if I were intend to print non-english character

    - by Yan Cheng CHEOK
    I try to set the encoding of my editor to UTF-16. (Java String store the data in UTF-16 internally, right?) And I type the following code package helloworld; /** * * @author yan-cheng.cheok */ public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("???"); System.out.println("\u6587\u4EF6\u79CD\u7C7B"); } } However, the output is not what I expected : ???? ????? I try to change the editor encoding format to UTF-8, it works this time! ??? ???? May I know why I need to change the editor encoding format to UTF-8 but not UTF-16? Isn't Java String store the data in UTF-16 internally?

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  • Create Zip File In Windows and Extract Zip File In Linux

    - by Yan Cheng CHEOK
    I had created a zip file (together with directory) under Windows as follow : package sandbox; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * * @author yan-cheng.cheok */ public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // These are the files to include in the ZIP file String[] filenames = new String[]{"MyDirectory" + File.separator + "MyFile.txt"}; // Create a buffer for reading the files byte[] buf = new byte[1024]; try { // Create the ZIP file String outFilename = "outfile.zip"; ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename)); // Compress the files for (int i=0; i<filenames.length; i++) { FileInputStream in = new FileInputStream(filenames[i]); // Add ZIP entry to output stream. out.putNextEntry(new ZipEntry(filenames[i])); // Transfer bytes from the file to the ZIP file int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } // Complete the entry out.closeEntry(); in.close(); } // Complete the ZIP file out.close(); } catch (IOException e) { e.printStackTrace(); } } } The newly created zip file can be extracted without problem under Windows, by using http://www.exampledepot.com/egs/java.util.zip/GetZip.html However, I realize if I extract the newly created zip file under Linux, using http://www.exampledepot.com/egs/java.util.zip/GetZip.html, I will get a file named "MyDirectory\MyFile.txt" instead of MyFile.txt being placed under folder MyDirectory. I try to solve the problem by changing the zip file creation code to String[] filenames = new String[]{"MyDirectory" + "/" + "MyFile.txt"}; But, is this an eligible solution, by hard-coded the seperator? Will it work under Mac OS? (I do not have a Mac to try out)

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  • cannot login to ubuntu 14.04

    - by Wallace Cheng
    I upgraded my Hp g6 from ubuntu 13.10 to 14.04 yesterday. Now I cannot log into the system using ubuntu/unity But I can still login using i3 windows manager. I checked and found the ubuntu-desktop is broken. I tried to reinstall it, it complained about the dependency issue and broken package. some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help resolve the situation: The following packages have unmet dependencies: ubuntu-desktop : Depends: ubuntu-session but it is not going to be installed Recommends: empathy but it is not going to be installed E: Unable to correct problems, you have held broken packages. when I tried to install ubuntu-session, Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help resolve the situation: The following packages have unmet dependencies: ubuntu-session : Depends: gnome-session-bin (< 3.10) but 3.10.1-0ubuntu1~saucy1 is to be installed Depends: gnome-session-common (= 3.9.90-0ubuntu12) but 3.10.1-0ubuntu1~saucy1 is to be installed E: Unable to correct problems, you have held broken packages. I tried sudo apt-get install -f but it does not work Any help would be highly appreciated. Thanks.

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  • Technique to have screen independent grid based puzzle with sprite animation

    - by Yan Cheng CHEOK
    Hello all, let's say I have a fixed size grid puzzle game (8 x 10). I will be using sprites animation, when the "pieces" in the puzzle is moving from one grid to another grid. I was wondering, what is the technique to have this game being implemented as screen resolution independent. Here is what I plan to do. 1) The data structure coordinate will be represented using double, with 1.0 as max value. // Puzzle grid of 8 x 10 Environment { double width = 0.8; double height = 1.0; } // Location of Sprite at coordinate (1, 1) Sprite { double posX = 0.1; double posY = 0.1; double width = 0.1; double height = 0.1; } // scale = PYSICAL_SCREEN_SIZE drawBitmap ( sprite_image, sprite_image_rect, new Rect(sprite.posX * Scale, sprite.posY * Scale, (sprite.posX + sprite.width) * Scale, (sprite.posY + sprite.Height) * Scale), paint ); 2) A large size sprite image will be used (128x128). As sprite image shall look fine if we scale from large size down to small size, but not vice versa. Besides the above mentioned technique, is there any other consideration I had missed out?

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  • Who should write the test plan?

    - by Cheng Kiang
    Hi, I am in the in-house development team of my company, and we develop our company's web sites according to the requirements of the marketing team. Before releasing the site to them for acceptance testing, we were requested to give them a test plan to follow. However, the development team feels that since the requirements came from the requestors, they would have the best knowledge of what to test, what to lookout for, how things should behave etc and a test plan is thus not required. We are always in an argument over this, and developers find it a waste of time to write down things like:- Click on button A. Key in XYZ in the form field and click button B. You should see behaviour C. which we have to repeat for each requirement/feature requested. This is basically rephrasing what's already in the requirements document. We are moving towards using an Agile approach for managing our projects and this is also requested at the end of each iteration. Unit and integration testing aside, who should be the one to come up with the end user acceptance test plan? Should it be the reqestors or the developers? Many thanks in advance. Regards CK

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  • Do you start migrating your Swing project to JavaFX

    - by Yan Cheng CHEOK
    I have a 4 years old project which is written in Swing + SwingX. Currently, it is still alive and still kicking. However, as more GUI related feature requests coming in (For instance, a sortable tree table), I start to feel the difficulty in fulling the requests. This is true especially there isn't active development going around SwingX project. Also, I hardly can find any good, yet being actively maintained/ developed/ evolving GUI Java framework. I was wondering, any of Swing developers feel the same thing? Have you start to migrate your Swing project to a much more active developed GUI framework like JavaFX?

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  • Free Online Translation Tool Hosting for Java Open Source Project [closed]

    - by Yan Cheng CHEOK
    I'm looking for a free online translation tool hosting. I wish to leverage help from open source community, to keep the language files for an open source project (Java) up to date. http://jstock.hg.sourceforge.net/hgweb/jstock/jstock/file/7871125356f7/src/org/yccheok/jstock/data Pootle seems good, as it supports Java language properties files as well. However, their official hosting site, is not opened for public registration. I was wondering, is there any free online translation tool hosting for Java open source project (Or similar) ?

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  • systemd initiated uwsgi process shuts down after a while

    - by Calvin Cheng
    So I wrote this simple systemd service script:- [Unit] Description=uwsgi server script [Service] User=web Group=web WorkingDirectory=/var/www/prod/myproject/releases/current ExecStart=/bin/bash -c 'source ~/.bash_profile; workon myproject; uwsgi --ini /var/www/prod/myproject/releases/current/myproject/uwsgi_prod.ini' [Install] WantedBy=multi-user.target which works fine - it starts up and I can see my uwsgi processes in htop. However, it inexplicably shuts down after being idle for 5 minutes. If I start this process manually in bash console by executing, as web user:- source ~/.bash_profile workon myproject uwsgi --ini /var/www/prod/myproject/releases/current/myproject/uwsgi_prod.ini my process does not die after being idle. What could the problem be?

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  • How do I disable other monitors while running games in Wine?

    - by Michael Cheng
    My current setup is: * Dual GTS 250 video cards * 3 Monitors * Used nvidia-settings to run each monitor as a separate x session * This is all running on Linux Mint Debian Edition When running games (Starcraft II) in Wine via PlayOnLinux, I've found that the mouse does not get locked. I already tried various solutions littered across the web and none work so I'd rather just disable my other two monitors while playing. Does anyone know of a method where I can turn off my other two monitors (not my primary monitor) while running Wine and then turn then back on afterwards? I don't mind having to manually run a script before and after gaming. Thanks.

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  • How to run Event Viewer as another user?

    - by Ray Cheng
    I want to create a shortcut to run Windows Event Viewer as another user, but the following doesn't seem to work. Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\Windows\System32>C:\Windows\System32\runas.exe /noprofile /user:domain\username "C:\Windows\system32\eventvwr.msc /s" Enter the password for domain\username: Attempting to start C:\Windows\system32\eventvwr.msc /s as user "dnr\adm_rche490" ... RUNAS ERROR: Unable to run - C:\Windows\system32\eventvwr.msc /s 193: C:\Windows\system32\eventvwr.msc /s is not a valid Win32 application. But if I create the shortcut without the runas part, it works but with the current logon user. What am I doing wrong?

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  • placing shell script under systemd control

    - by Calvin Cheng
    Assuming I have a shell script like this:- #!/bin/sh # cherrypy_server.sh PROCESSES=10 THREADS=1 # threads per process BASE_PORT=3035 # the first port used # you need to make the PIDFILE dir and insure it has the right permissions PIDFILE="/var/run/cherrypy/myproject.pid" WORKDIR=`dirname "$0"` cd "$WORKDIR" cp_start_proc() { N=$1 P=$(( $BASE_PORT + $N - 1 )) ./manage.py runcpserver daemonize=1 port=$P pidfile="$PIDFILE-$N" threads=$THREADS request_queue_size=0 verbose=0 } cp_start() { for N in `seq 1 $PROCESSES`; do cp_start_proc $N done } cp_stop_proc() { N=$1 #[ -f "$PIDFILE-$N" ] && kill `cat "$PIDFILE-$N"` [ -f "$PIDFILE-$N" ] && ./manage.py runcpserver pidfile="$PIDFILE-$N" stop rm -f "$PIDFILE-$N" } cp_stop() { for N in `seq 1 $PROCESSES`; do cp_stop_proc $N done } cp_restart_proc() { N=$1 cp_stop_proc $N #sleep 1 cp_start_proc $N } cp_restart() { for N in `seq 1 $PROCESSES`; do cp_restart_proc $N done } case "$1" in "start") cp_start ;; "stop") cp_stop ;; "restart") cp_restart ;; *) "$@" ;; esac From the bash script, we can essentially do 3 things: start the cherrypy server by calling ./cherrypy_server.sh start stop the cherrypy server by calling ./cherrypy_server.sh stop restart the cherrypy server by calling ./cherrypy_server.sh restart How would I place this shell script under systemd's control as a cherrypy.service file (with the obvious goal of having systemd start up the cherrypy server when a machine has been rebooted)? Reference systemd service file example here - https://wiki.archlinux.org/index.php/Systemd#Using_service_file

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  • How to implement Comet in database side?

    - by Morgan Cheng
    I have been searched for this question for a long time. How to implement Comet in database side? To support Comet, we'd better have a web server stack that supports asynchronous operation. So, Apache is not a option. There are some open source web server such as tornado can do asynchronous http handling. This is in web server level. In database level, how to make web server know that some event happens in database? There should be a asynchronous way to let web server know that something updated in database. Polling is not a option. Is there any example available?

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  • systemd: enabling cherokee service as a `unit file`

    - by Calvin Cheng
    So I am learning how to use systemd to initialize my services automatically on server reboot. So of course, I first make sure I have systemd and some optional systemd related packages installed. pacman -S systemd initscripts-systemd Installation seems to go well and checking, I can see that systemd and its dependency libsystemd are installed. And the optional package initscripts-systemd is also installed:- [root@li280-195 ~]# pacman -Ss systemd extra/libsystemd 44-5 [installed] systemd client libraries extra/systemd 44-5 [installed] system and service manager extra/systemd-sysvcompat 2-2 sysvinit compat symlinks for systemd community/initscripts-systemd 20120412-1 [installed] Arch specific systemd initialization/bootup scripts for systemd community/systemd-arch-units 20120412-2 Arch specific Systemd unit files Next, I ensure that systemd is loaded up when my server reboots, via grub in grub's /boot/grub/menu.lst file like this:- kernel /boot/vmlinuz root=/dev/xvda ro init=/bin/systemd Rebooting my server to check, all loads up well and I can check that systemd is operational via:- systemctl list-unit-files However, I don't see my cherokee initialization script (which is simply created at /etc/rc.d/cherokee when I installed cherokee earlier via pacman -S cherokee) being listed as one of my unit files. So the question is, how do I do that? How do I put my cherokee initialization script under systemd's control?

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  • How do I add new users to PostgreSQL 9.1 on Mac OS X 10.6?

    - by Cheng
    I am unable to run psql with my normal Mac user account in Terminal session, although I can do it using the postgres service account). When I enter the command psql mydb and type my password, I get the following message: WARNING: password file "/Users/beh/.pgpass" has group or world access; permissions should be u=rw (0600) or less But I cannot find .pgpass. How do I set up and add users to my PostgreSQL 9.1 database on Mac OS X 10.6.8?

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  • HTTP 401 error in Windows Authentication disappears after swapping Providers

    - by Ray Cheng
    The IIS 7 on Windows 2008 R2 is acting really weird. We deploy our web apps as web sites with appcmd.exe. After they are deployed, if I browse to them, I'll get HTTP 401 errors. The web sites are only have Windows Authentication enabled and the providers are Negotiate and NTLM in such order. But if I swap the providers, the HTTP 401 error goes away. Even if I swap it back, the errors are still gone. So the order of the providers doesn't seem to matter, what matters is the swapping. It must have triggered something. Even if we delete the web site and application pool and reinstall the web sites, the errors are still gone. So far, we can't reproduce it easily since it happens randomly. Has anyone experienced this? How do I go about to troubleshoot it?

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