Java snippet to open, modify and write back to same file

Objective :
Very often you find this requirement. Sometimes you try and overcome using linux commands rather than going by the Java programming technique.

Here is a snippet that would be handy.

 public static void main(String[] args) throws IOException {
   
    // Read XML as string
    byte[] buffer = new byte[(int) new File(args[0]).length()];
    FileInputStream f = new FileInputStream(args[0]);
    f.read(buffer);
   
    // format it
        String unformattedXml = new String(buffer);
        String formattedXml = new XmlFormatter().format(unformattedXml);
       
    // Write formatted string back into same file        
        FileOutputStream pOUTPUT;
        PrintStream pPRINT;
        pOUTPUT = new FileOutputStream(args[0]);
        pPRINT = new PrintStream(pOUTPUT);
        pPRINT.println (formattedXml + "\n");
        pPRINT.close();
        System.out.println(    formattedXml );

}


Found this handy even after experience in Java programmer.

Small end webserver that can meet up to aspirations of self-owned website

'Small end webserver that can meet up to aspirations of self-owned website'

Which is it ? It is Apache Tomcat . A web server ( not a full-fledged J2EE container ) but can meet up to most of your needs.

Off-late you may wonder on the kind of technical support from user community might be not very easy to get. But I was wrong.

https://blogs.apache.org/tomcat/
gives you very good support.
With respect to debugging the webserver is concerned . Never thought it would be so easy to do it on a  local machine.
Its so easy to do it, with Tomcat 7 - JMX - Sun JConsole

TOMCAT 7 - JMX - SUN JDK JConsole

STEP -1 ] Install SUNJDK 1.6+ or above
STEP -2 ] Install SUNJRE 1.6+ or above
STEP -3 ] Install TOMCAT 7.0 or above

STEP -4 ] Set the ENV properties
Linux platform
$ CATALINA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Djava.rmi.server.hostname=test-idc.internet2.edu";
$ export CATALINA_OPTS;

On Windows
In envirnoment variables
create CATALINA_OPTS
-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Djava.rmi.server.hostname=localhost


STEP -5 ] Start Tomcat
C:\tomcat70\bin\Tomact7.exe

STEP -6 ] Start JConsole
C:\SUNJDK16\bin\jconsole.exe

STEP -7 ] Connnect to local PID of tomcat process.
Reference :
https://wiki.internet2.edu/confluence/display/CPD/Monitoring+Tomcat+with+JMX

 Thanks Apache Foundation.

Apache technologies of value.

In my experience often found, big product companies do start with and idea, that would be their core functionality, as value add, they would rely on lot of open source projects .

A good list was captured by me off late.




http://www.slf4j.org/index.html

If you are a Apache project  technologies lover, this is a nice starting point.
SOLR - search engine
LIFERAY - portal development
JODC - Office integration
are some of which I had a chance to read through and use it to an extent.

There are lots more. Do explore. Key is to integrate to the product suite.