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java ping

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Join Date: Mar 2007

Posts: 154

Reputation: mrjoli021 is an unknown quantity at this point

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mrjoli021

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java ping

Dec 5th, 2008

I am trying to write a program that will monitor my routers and servers and notify me when they go down. I am looking for a way to ping the host and read the reply. The InetAddress.isReachable method is the only thing i could find but it uses the echo port which windows has it off by default. i am looking for something generic that i can use on diffrent platforms. Windows, Linux, Cisco OS.

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Join Date: Aug 2007

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Reputation: darkagn has a spectacular aura about

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darkagn

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Re: java ping

Dec 6th, 2008

Take a look at the Runtime class. You can use its exec method to run a ping and the resulting Process has methods to allow you to obtain the I/O/E streams. This allows you to interpret the results of your ping, but note that there are differences in the ping implementation in Windows and Linux (not sure about Cisco OS sorry).

Hope this gives you some direction,
darkagn

There are no stupid questions, only those too stupid to ask for help.
echo is a web developer's best friend.

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Join Date: Mar 2007

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Reputation: mrjoli021 is an unknown quantity at this point

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mrjoli021

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Re: java ping

Dec 6th, 2008

Runtime() has private access in java.lang.Runtime
Runtime r = new Runtime();

why am i getting this error?

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Join Date: Nov 2008

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Reputation: Antenka has a spectacular aura about

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Antenka

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Re: java ping

Dec 6th, 2008

Hello, mrjoli021
I hope the Sun description of Runtime class help you:
http://java.sun.com/j2se/1.4.2/docs/...g/Runtime.html

Last edited by Antenka; Dec 6th, 2008 at 3:45 pm.

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No one would ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal

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Join Date: Aug 2007

Posts: 793

Reputation: darkagn has a spectacular aura about

Solved Threads: 110

darkagn

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Re: java ping

Dec 6th, 2008

You need to use the static getRuntime() method in order to instantiate the Runtime object.

There are no stupid questions, only those too stupid to ask for help.
echo is a web developer's best friend.

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Join Date: Aug 2007

Posts: 793

Reputation: darkagn has a spectacular aura about

Solved Threads: 110

darkagn

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Re: java ping

Dec 6th, 2008

As an aside, if you want to limit people to only use one instance of your class in an application, you can do something like this:

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
public class myClass {
 
  private static myClass instance = null;
 
  private myClass()
  {
    // do something when creating the instance
  }
 
  public static myClass getInstance()
  {
    if( instance == null )
    {
      instance = new myClass();
    }
    return instance;
  }
}
public class myClass {

  private static myClass instance = null;

  private myClass()
  {
    // do something when creating the instance
  }

  public static myClass getInstance()
  {
    if( instance == null )
    {
      instance = new myClass();
    }
    return instance;
  }
}