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Re: System.out & ByteArrayOutputStream
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Re: System.out & ByteArrayOutputStream


  • Subject: Re: System.out & ByteArrayOutputStream
  • From: Owen Jones <email@hidden>
  • Date: Wed, 10 Nov 2004 14:38:55 -0500
  • Organization: York University

Nathan;

Subclass ByteArrayOutputStream and override the write() methods (there are two).

e.g. (partial, not tested):

class myByteArrayOutputStream extends ByteArrayOutputStream {
...
  public void write(int b) {
     super.write(b);
     // do my stuff

  }
...
}

Add callbacks if you need to.


Nathan Dumar wrote:

I'm reading the docs but coming up short. I want to send an email when I get a message posted to System.out or System.err. So far, I have ...

    // none of this has been tested yet
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    PrintStream ps = new PrintStream(baos);
    System.setOut(ps);
    System.setErr(ps);

I can do baos.toString() to get the String I need for the body of the email. The problem is that when my ByteArrayOutputStream baos gets written to, I need to do stuff, then send the email.

I can't figure out a way to set off another method after baos gets data. Any ideas?

Thank you,
Nathan

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