COWMAN-CHIANG | Page 5

[Jersey] disable decode the URL path

Posted on 2017 年 06 月 01 日 by cowman.chiang

use annotation “@Encoded”

Ex:

@Path("{first}/get")
public Response getYouWant(@Context HttpHeaders httpHeaders, @PathParam("first") String first, @QueryParam("second")  @Encoded String second);

Posted in Java | Leave a comment

Linux command to get time in milliseconds

Posted on 2017 年 05 月 19 日 by cowman.chiang

src: Linux command to get time in milliseconds

date +”%T.%N” returns the current time with nanoseconds.
date +”%T.%6N” returns the current time with nanoseconds rounded to the first 6 digits, which is microseconds.
date +”%T.%3N” returns the current time with nanoseconds rounded to the first 3 digits, which is milliseconds.

Posted in Linux | Leave a comment

open external program from java for mac os x

Posted on 2017 年 03 月 24 日 by cowman.chiang

String[] cmds = {"open",  tempFile.getAbsolutePath(), "-a", "/Applications/Microsoft Office 2011/Microsoft Excel.app"};
Runtime.getRuntime().exec(cmds);

Posted in Java, Mac, Office | Leave a comment

Add git branch name to bash prompt

Posted on 2017 年 03 月 23 日 by cowman.chiang

edit ~/.bash_profile

if [ -f $(xcode-select -p)/usr/share/git-core/git-completion.bash ]; then
    . $(xcode-select -p)/usr/share/git-core/git-completion.bash
    . $(xcode-select -p)/usr/share/git-core/git-prompt.sh
fi

#enables color in the terminal bash shell
export CLICOLOR=1

#sets up the color scheme for list
export LSCOLORS=ExFxCxDxBxegedabagacad

#sets up the prompt color (currently a green similar to linux terminal)
export PS1='\n\[\e[1;30m\]┌─\[\e[0m\]\[\e[01;343m\]\u@\h\[\e[00m\]:\[\e[01;34m\]\w\[\e[00m\]\n\[\e[1;30m\]└──\[\e[0m\]\$ \[\e[00;33m\]$(__git_ps1 "(%s)")\[\e[00m\]'

#enables color for iTerm
export TERM=xterm-color

Posted in CentOS, Git, Linux, Mac, Ubuntu | Leave a comment

Install Hbase 5.9 in Mac OS X

Posted on 2017 年 03 月 10 日 by cowman.chiang

Download hbase package tar.gz file from https://www.cloudera.com/documentation/enterprise/release-notes/topics/cdh_vd_cdh_package_tarball_59.html
Untar tar.gz file
edit conf/hbase-env.sh
export JAVA_HOME={{JAVA_HOME Directory path}}
edit conf/hbase-site.xml

  <property>
    <name>hbase.rootdir</name>
    <value>file:///{{location}}/data</value>
  </property>
  <property>
    <name>hbase.zookeeper.property.dataDir</name>
    <value>{{location}}/zookeeper</value>
  </property>
  <property>
    <name>hbase.zookeeper.quorum</name>
    <value>{{hostname}}</value>
  </property>

start hbase service
bin/start-hbase.sh
run hbase shell
bin/hbase shell
stop hbase shell service
bin/stop-hbase.sh

Posted in HBase, Mac | Leave a comment

Gson usage : formJson

Posted on 2017 年 02 月 17 日 by cowman.chiang

avoid to face the exception ‘java.lang.ClassCastException With com.google.gson.internal.LinkedTreeMap cannot be cast to…’, we use the TypeToken to convert json to List

Posted in Java | Leave a comment

Redirect stdout to logFile in shell script

Posted on 2017 年 02 月 02 日 by cowman.chiang

exec > >(tee -i logfile.txt)

source: stackoverflow: redirect COPY of stdout to log file from within bash script itself

Posted in Shell Script | Leave a comment

protect data validation to fail while copy and paste data

Posted on 2017 年 01 月 25 日 by cowman.chiang

Private Sub Worksheet_Change(ByVal Target As Range)
    'Does the validation range still have validation?
    Set range1 = Range("B2:B6500")
    If HasValidation(range1) Then
        Exit Sub
    Else
        Application.Undo
        MsgBox "您的操作將會被取消, " & vbCrLf & "請使用下拉選單進行選擇", vbCritical
    End If
End Sub

Private Function HasValidation(r) As Boolean
'   Returns True if every cell in Range r uses Data Validation
    On Error Resume Next
    x = r.Validation.Type
    If Err.Number = 0 Then HasValidation = True Else HasValidation = False
End Function

source: Ensuring That Data Validation Is Not Deleted

Posted in Excel | Leave a comment

Get timestamp in milliseconds

Posted on 2017 年 01 月 24 日 by cowman.chiang

echo $(($(date +%s%N)/1000000))

in Mac OS X, the command date does not support the %N flag, we can install coreutils using homebrew.
brew install coreutils

Then use gdate to get which we want.
echo $(($(gdate +%s%N)/1000000))

Posted in Linux, Mac | Leave a comment

find unused files and delete them

Posted on 2017 年 01 月 16 日 by cowman.chiang

find /var/log/radius/radacct -type f -name "reply*" -mtime +60 -exec rm -rf {} \;

-mtime N — more than N days without being edited
-exec CMD {} \; — comands, {} means the files which be found.

Posted in Linux, Shell Script | Leave a comment

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