This is command to show remote branches:
$ git remote
$ git remote show origin
* remote origin
Fetch URL: firstname.lastname@example.org:/home/user/git/project.git
Push URL: user@example:/home/user/git/project.git
HEAD branch: master
Local branches configured for 'git pull':
develop merges with remote develop
feature/feature1 merges with remote feature/feature1
master rebases onto remote master
release merges with remote release
Local refs configured for 'git push':
develop pushes to develop (up to date)
feature/feature1 pushes to feature/feature1 (up to date)
master pushes to master (up to date)
release pushes to release (up to date)
This is command to checkout remote branch to local, and set the local branch to track remote branch:
git checkout --track origin/branchname
These are the steps to configure MySQL Data Source in IBM WebSphere:
1. Create JAAS (J2C authentication data) Credential
2. Create MySQL JDBC Provider
3. Create MySQL Data Source
When default configuration does not exists (logback.groovy, logback-test.xml, logback.xml), LogBack will read system property to get the configuration file location:
java -Dlogback.configurationFile=/path/to/config.xml com.stefanauwyang.ApplicationClass
LogBack can be configured to automatically detect the change in configuration file:
<configuration scan="true" scanPeriod="30 seconds" >
scanPeriod attribute, default period 60 seconds will be set automatically.
LogBack provides a servlet to check the LogBack logging status:
We can also print LogBack status to console by configuring this listener through Java code.
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
StatusManager statusManager = lc.getStatusManager();
OnConsoleStatusListener onConsoleListener = new OnConsoleStatusListener();
… or from config file …
<statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
It is often that we started a project in our local laptop, and we want this project secured in our server. I know, it may not possible to execute
git clone command from server to clone the project from your local computer due to firewall or at that moment your laptop does not have public IP like your server does.
Before pushing the project to server, I assumed that we have created git repository in the server:
$ mkdir projectname.git
$ cd projectname.git
$ git init --bare
$ git init --bare projectname.git
From our local, execute these command to push the git local repository to the server:
$ git remote add origin ssh://email@example.com:port/path/to/projectname.git
$ git push origin master
Now we have our project safe in the server. We can safely continue our work in local laptop, we can clone to other laptop if required, and push the changes to server anytime we want.
When deploying our application in IBM WebSphere application server, sometimes there are some libraries which we are using in our application, get conflicted with the one being used by WebSphere.
Follow this instruction to configure WebSphere to load our application libraries first before it loads the WebSphere libraries.
1. Install the application in WebSphere
2. Once the application installed, go to this path:
Enterprise Applications > [ear application name] > Manage Modules > [war application name]
Class loader order to
Classes loaded with parent class loader first
4. Start the application.
Our application will be started by loading application libraries first, before then it loads WebSphere libraries.
Most of the time, we don’t want to allow direct access to the port from outside our server.
We can configure this through iptables command.
In this example we want to configure port 8080 to be accessible from localhost only. These are the steps:
1. Execute this command to accept connection from localhost.
iptables -A INPUT -p tcp -s localhost --dport 8080 -j ACCEPT
2. Execute this command to drop any connection from other hosts.
iptables -A INPUT -p tcp --dport 8080 -j DROP
If we want to undo this changes, we can execute the same command by replacing
-D. From here we may reverse proxy our 8080 port using our apache http server.