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Adaptive Overlays for Shared Stream Processing Environments


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Adaptive Overlays for Shared Stream Processing Environments

HPL-2007-178 (R.1) Adaptive Overlays for Shared Stream Processing Environments - Papaemmanouil, Olga; Basu, Sujoy; Banerjee, Sujata
Keyword(s): stream processing, overlay, quality-of-service
Abstract: Large-scale overlays has become a powerful paradigm for deploying stream processing applications in wide-area environments. The dynamic nature of these systems makes it difficult to guarantee the Quality of Service (QoS) requirements of each application. In this work we present a framework for distr ...
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Parser::Style::Stream(3pm)				User Contributed Perl Documentation				Parser::Style::Stream(3pm)

NAME
XML::Parser::Style::Stream - Stream style for XML::Parser
SYNOPSIS
use XML::Parser; my $p = XML::Parser->new(Style => 'Stream', Pkg => 'MySubs'); $p->parsefile('foo.xml'); { package MySubs; sub StartTag { my ($e, $name) = @_; # do something with start tags } sub EndTag { my ($e, $name) = @_; # do something with end tags } sub Characters { my ($e, $data) = @_; # do something with text nodes } }
DESCRIPTION
This style uses the Pkg option to find subs in a given package to call for each event. If none of the subs that this style looks for is there, then the effect of parsing with this style is to print a canonical copy of the document without comments or declarations. All the subs receive as their 1st parameter the Expat instance for the document they're parsing. It looks for the following routines: o StartDocument Called at the start of the parse . o StartTag Called for every start tag with a second parameter of the element type. The $_ variable will contain a copy of the tag and the %_ variable will contain attribute values supplied for that element. o EndTag Called for every end tag with a second parameter of the element type. The $_ variable will contain a copy of the end tag. o Text Called just before start or end tags with accumulated non-markup text in the $_ variable. o PI Called for processing instructions. The $_ variable will contain a copy of the PI and the target and data are sent as 2nd and 3rd parameters respectively. o EndDocument Called at conclusion of the parse. perl v5.14.2 2011-05-25 Parser::Style::Stream(3pm)

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