Download - System Update 2010 CrossRef Workshops
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The QS
How did we build the new query system?
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Development Team
Andrew Gilmartin, Chuck Koscher, Evans Lin, Hisham Shahtout
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1. Interesting parts of the QS
2. Experiences building the QS
3. Lessons learned for the DS
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Tools
modern, but not too modern
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NetBeans 6.[89]
technique sharing, tool building
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Java 6
generics, annotations, oh my!
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Tomcat 5.5
servlets are components too*
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HAProxy 1.4
http://haproxy.1wt.eu/
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Oracle && MySQL
valuable || expendable
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ActiveMQ 5.4
wicked fast loose coupling
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Spring 3.0
Really?
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Spring || EJB || ???
reaction, refinement, replacement, re-implement, rejoice
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POJOs || Deployment Descriptors
i just ( do || describe ) objects
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Dependency Injection || Coded Configuration
more than one main()
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Functional Interfaces || Featureful Interfaces
a little well done is enough
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Spring Experiences
some tales are told a little later
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Design
and not doing architecture
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Controllers, Services && Coordination
insides and outsides
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“Where is this article?”!
“Does this DOI have meta-data?”!
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Service Engine
actual heavy lifting
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Management
x-rays, JMX
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Health
…, lub-dub, lub-dub, …
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!!!!$//-%&'!:.L%&5:'1NOP!Q!
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Artifacts
secondary (lossy) data flow(s)
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Interim Storage
bigger response, expiration
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Notifications
urgency, ( now || later ), aggregates
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Spring Experiences
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Coming up to speed
books are useful … for about 5 hours
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Is that answer for Spring 1.x || 2.x || 3.x?
rummaging around the net
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Deployment Descriptors
they’re back and now called contexts
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Spring Beans && Java Properties
Where do I defined this thing?
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XML
XSDs, id(s) || name(s), conditional sections
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Runtime Configuration Errors
scripting without the support tools
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Bondage
bound to Spring as much as you are to any framework
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It might be there
but not designed as expected
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Development lessons from the QS to apply
with the DS
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Undervalue your own ideas
the view from the backside of the leading edge
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Existing wheels are generally well designed
use code libraries … which are sometimes your own
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Use the API correctly
150/second to 2000/second
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Stopping buck-passing
artifacts, costs, choices
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A does not follow B right away
synchronization and the ReadWriteLock are your friends
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Pick a monitoring tool as-soon-as-possible
instills design for management and monitoring
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The data is already stale
design data for management and convert data for use
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Priming takes a long time
pool XML parsers
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Data conversion takes a longer time
break it up into multiple parts
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Spring Contexts need support tools
we have one, we need more
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Design small interfaces
federation of cliques
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Front-Controller vs Servlets
I want my componentization back
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Keep talking
especially with distant developers
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