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What is Dalvik? by Mark Murphy

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Old 09-16-2010
What is Dalvik? by Mark Murphy
I asked an Android guy to explain some things to me about Dalvik, so I could understand the Oracle v. Google situation in more depth.
I'm not a programmer, I told him, but I need to understand the tech behind the lawsuit, so I can understand when the lawyers start arguing about what Google did and didn't do and whether it was entitled to do it or not. What is Dalvik? Why use it? So I asked Mark Murphy, the founder of CommonsWare, and who is the author of three books on Android application development, including Busy Coder's Guide to Android Development, to explain it. He also trains folks in developing for Android. Also, he doesn't work for Google, so he can speak more freely. Once you are in litigation, most companies are silent as the grave until it's decided. Don't go by SCO. That big-mouth grandstanding to the media was not typical.
If, like me, you never paid much attention before to all the intricacies of Java, it's a chance to get up to speed on all that, as the article walks us through different ways the word Java is used, sometimes a bit loosely, as well as explaining what Dalvik does and the benefits it offers.

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LEARN ABOUT SUSE

apache::session::oracle

Session::Oracle(3)					User Contributed Perl Documentation					Session::Oracle(3)

NAME

       Apache::Session::Oracle - An implementation of Apache::Session

SYNOPSIS

	use Apache::Session::Oracle;

	#if you want Apache::Session to open new DB handles:

	tie %hash, 'Apache::Session::Oracle', $id, {
	   DataSource => 'dbi:Oracle:sessions',
	   UserName   => $db_user,
	   Password   => $db_pass,
	   Commit     => 1
	};

	#or, if your handles are already opened:

	tie %hash, 'Apache::Session::Oracle', $id, {
	   Handle => $dbh,
	   Commit => 1
	};

DESCRIPTION

       This module is an implementation of Apache::Session.  It uses the Oracle backing store and no locking.  See the example, and the
       documentation for Apache::Session::Store::Oracle for more details.

USAGE

       The special Apache::Session argument for this module is Commit.	You MUST provide the Commit argument, which instructs this module to
       either commit the transaction when it is finished, or to simply do nothing.  This feature is provided so that this module will not have
       adverse interactions with your local transaction policy, nor your local database handle caching policy.	The argument is mandatory in order
       to make you think about this problem.

       This module also respects the LongReadLen argument, which specifies the maximum size of the session object.  If not specified, the default
       maximum is 8 KB.

AUTHOR

       This module was written by Jeffrey William Baker <jwbaker@acm.org>.

SEE ALSO

       Apache::Session::File, Apache::Session::Flex, Apache::Session::DB_File, Apache::Session::Postgres, Apache::Session

perl v5.12.1							    2007-09-28							Session::Oracle(3)