About 10 years ago I wanted to write a telnet client in PHP. My need was to login, execute some commands and logout. I was lazy to read the telnet protocol details. Hence I used the following approach to do it which worked for my purpose. Let your programming language be Java, C, C++, PHP, C# or anything else. It needs to have a TCP socket creation facility (TCP networking).

Here are the steps:

Spring is a great application framework extensively used in Java applications. Spring Security is yet another open source product from the same company that provides extensive security features going beyond what is in the Java Enterprise Edition specifications (Servlets, EJB). Interestingly, you can use Spring Security in any application server you like without modifications to your application. So your security configuration is not going to be different in different environments, it  becomes portable too.

JPA (Java Persistence Architecture) greatly simplifies the persistence implementation of Java applications. In web-tier, the following forces/constraints exist:

Linux users: The process is almost the same. See the bottom of this page.

With Spring 3.x, you can develop JPA applications very easily. Here you find guidelines in creating such an application with the following features:

Environment: JDK 1.6, JBoss 5.1, Eclipse 3.5 (Galileo)

I came across the following JBoss error when a JAX-WS Web service was accessed:

11:15:18,008 ERROR [SOAPFaultHelperJAXWS] SOAP request exception
java.lang.UnsupportedOperationException: setProperty must be overridden by all subclasses of SOAPMessage
    at javax.xml.soap.SOAPMessage.setProperty(SOAPMessage.java:441)
    at org.jboss.ws.core.soap.SOAPMessageImpl.<init>(SOAPMessageImpl.java:87)