Getting name of the running application with java

Question

i think the title explain the probleme, in fact, if i had a host and a port of running application how we can determine there name with java.

public String getApplicationName(String host,int port) {//some code}

Is not clear what you are asking. Generally to an host and port answer an application server that can handle many different wars or ears (if it is a java application server). There is not name for that. — Davide Lorenzo MARINO, Aug 22 '16 at 10:41
@SheetalMohanSharma this question has nothing to do with the name of current executing method! — Davide Lorenzo MARINO, Aug 22 '16 at 10:41

score 0 · Answer 1 · answered Aug 22 '16 at 10:45

0

host and a port of running application

Only operation system is aware of applications that are running now. So it's impossible to get info about processes avoiding writing OS specific logic.

E.g for Windows it looks like:

Process proc = Runtime.getRuntime().exec ("tasklist.exe");
InputStream procOutput = proc.getInputStream ();
if (0 == proc.waitFor ()) {
    // TODO scan the procOutput for your data
}

answered Aug 22 '16 at 10:45

Rudziankoŭ

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the application is running in the JVM, is it possible to get the main class at least ? – user3237201 Aug 22 '16 at 11:00
@user3237201, `jvm` is running inside the process managed by `OS`. 2 different applications run 2 different processes. It doesn't matter `jvm` or not processes are completely encapsulated, until you doesn't talk about `Threads` inside the same application. Please see http://stackoverflow.com/questions/200469/what-is-the-difference-between-a-process-and-a-thread – Rudziankoŭ Aug 22 '16 at 11:07

score 0 · Accepted Answer · answered Aug 22 '16 at 10:59

Sorry I jumped to conclusion in my comment earlier. I guess getting the process list from the command may be useful. Again OS specific...

try {
    String line;
    Process p = Runtime.getRuntime().exec("ps -e");
    BufferedReader input =
            new BufferedReader(new InputStreamReader(p.getInputStream()));
    while ((line = input.readLine()) != null) {
        System.out.println(line); //
//Run you pattern matcher here to parse data - host & port etc.
    }
    input.close();
} catch (Exception err) {
    err.printStackTrace();
}

Getting name of the running application with java

2 Answers2