RE: [jdom-interest] Is XMLOutputter thread-safe and/or reusable (
JDOMb9)? 2003-12-01 - By Rolf Lear
Back
Not intended to be thread safe. In particular, have a look at the xml:space
handling.
I is possible that you will get away without problems in your case, but,
nothing in JDOM is intended to be thread-safe. Safety is the responsibility
of the JDOM user, not the toolkit.
There is not much of an overhead in creating XMLOutputters, but if you are
absolutely determined to get the most, then how about using a thread-local.
Rolf
-- --Original Message-- --
From: jdom-interest-admin@(protected) [mailto:jdom-interest-admin@(protected)]On
Behalf Of Brian Sayatovic/AMIG
Sent: Monday, December 01, 2003 9:35 AM
To: jdom-interest@(protected)
Subject: [jdom-interest] Is XMLOutputter thread-safe and/or reusable
(JDOMb9)?
I have some classes which will be used to process several XML requests, and
at times, I want to dump the contents of the request to a file. I'm using
an XMLOutputter to do this, but right now, I'm constructing a new instance
of the XMLOutputter for each request that is to be dumped. I'm not certain
this is necessary, but I err'ed on the side of caution until I can get
confirmation that it is safe to share one instance of the XMLOutputter.
The Javadocs don't specify. I looked through the source, and nothing jumped
out at me. Can someone else confirm for me if XMLOutputter's 'output'
methods are both idempotent and thread-safe? I believe they are, but I'm
looking for confirmation. Obviously, changing the output settings
(indentation, etc.) would be a problem, but I use the exact same settings
every time, so those wouldn't be chanmgign in my case.
Regards,
Brian.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 5.50.4807.2300" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff size=2>Not
intended to be thread safe. In particular, have a look at the xml:space
handling.</FONT></SPAN></DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff size=2>I is
possible that you will get away without problems in your case, but, nothing in
JDOM is intended to be thread-safe. Safety is the responsibility of the JDOM
user, not the toolkit.</FONT></SPAN></DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff size=2>There
is not much of an overhead in creating XMLOutputters, but if you are absolutely
determined to get the most, then how about using a
thread-local.</FONT></SPAN></DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=662094914-01122003><FONT face=Arial color=#0000ff
size=2>Rolf</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-- --Original Message-- --<BR><B>From:</B> jdom-interest-admin@(protected)
.org
[mailto:jdom-interest-admin@(protected)]<B>On Behalf Of </B>Brian
Sayatovic/AMIG<BR><B>Sent:</B> Monday, December 01, 2003 9:35 AM<BR><B>To:</B
>
jdom-interest@(protected)<BR><B>Subject:</B> [jdom-interest] Is XMLOutputter
thread-safe and/or reusable (JDOMb9)?<BR><BR></FONT></DIV><BR><FONT
face=sans-serif size=2>I have some classes which will be used to process
several XML requests, and at times, I want to dump the contents of the
request
to a file. I'm using an XMLOutputter to do this, but right now, I'm
constructing a new instance of the XMLOutputter for each request that is to
be
dumped. I'm not certain this is necessary, but I err'ed on the side of
caution until I can get confirmation that it is safe to share one instance of
the XMLOutputter.</FONT> <BR><BR><FONT face=sans-serif size=2>The Javadocs
don't specify. I looked through the source, and nothing jumped out at
me. Can someone else confirm for me if XMLOutputter's 'output' methods
are both idempotent and thread-safe? I believe they are, but I'm
looking
for confirmation. Obviously, changing the output settings (indentation,
etc.) would be a problem, but I use the exact same settings every time, so
those wouldn't be chanmgign in my case.</FONT> <BR><FONT face=sans-serif
size=2><BR>Regards,<BR>Brian.</FONT></BLOCKQUOTE></BODY></HTML>
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