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How to use SSH tunneling to get to your restricted servers

Have you ever been told that in your network serverX can only be reached by a serverY via SSH? Now you have access to serverY from your own PC with normal SSH access as well, but just ...
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How to setup custom SSLSocketFactory’s TrustManager per each URL connection

We can see from javadoc that javax.net.ssl.HttpsURLConnection provided a static method to override with setDefaultSSLSocketFory() method. This allow you to supply a custom javax.net.ssl.TrustManager ...
java-interview-questions-answers

Poking around your REST application with a scriptable endpoint

I love the fact that JDK comes with a ScriptEngine. It’s so flexible when you want to evaluate and troubleshoot your application that’s already deployed in an server environment. ...
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Creating your own loop structure in Java 8 lambda

Java doesn’t have an easy construct of repeat something N number of times. We can make a for loop of course, but many times we don’t even care about the variable that we ...
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How to process stream and read text file in Java 8

I have converted one of my old utility class using latest Java8. I use this often to print content of manifest file to check any mysterious jar file for version etc. Just run “java ...
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How to use NodeManager to control WebLogic Servers

In my previous post, you have seen how we can start a WebLogic admin and multiple managed servers. One downside with that instruction is that those processes will start in foreground ...
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How to monitor multiple JVM’s on a server with VisualVM

In the last article I have shown you how to start WebLogic Server with single admin and mulitiple managed servers. After those are started, how do you go check their health status? ...
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How to start multiple WebLogic managed servers

The WebLogic Server docs recommand you to create a dedicated admin server and then sepearate managed servers for application deployment. Here I will show you how to create one or more ...
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How to create MySQL DataSource in WebLogic Server

One cool thing about using an application server is that it allows you to create DataSource outside of your application and it can manage it along with thread pool and transaction manager ...
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WebLogic Classloader Analysis Tool

The WebLogic Server has a built-in webapp called Classloader Analysis Tool, and you may access it through http://localhost:7001/wls-cat You need to login with same user as you configured ...
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