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kuni katsuya

Java Persistence/Persisting - Wikibooks, open books for an open world - 0 views

en.wikibooks.org/...Persisting

jpa persist merge remove find cascade

shared by kuni katsuya on 23 Oct 12 - No Cached
  • Persist
  • used to insert a new object into the database
  • it just registers it as new in the persistence context (transaction)
  • ...6 more annotations...
  • Merge
  • When the transaction is committed, or if the persistence context is flushed, then the object will be inserted into the database
  • used to merge the changes made to a detached object into the persistence context
  • it merges the changes into the persistence context (transaction)
  • When the transaction is committed, or if the persistence context is flushed, then the object will be updated in the database.
  • merge is only required when you have a detached copy of a persistence object
kuni katsuya

Java Persistence/ManyToMany - Wikibooks, open books for an open world - 0 views

en.wikibooks.org/...ManyToMany

java JPA many-to-many @ManyToMany wikibooks book

shared by kuni katsuya on 23 Oct 12 - Cached
  • Bi-directional Many to Many
  • object model can choose if it will be mapped in both directions
  • in which direction it will be mapped
  • ...9 more annotations...
  • one direction must be defined as the owner and the other must use the mappedBy attribute to define its mapping
  • you will end up getting duplicate rows
  • If the mappedBy is not used, then the persistence provider will assume there are two independent relationships
  • As with all bi-directional relationships it is your object model's and application's responsibility to maintain the relationship in both direction
  • Mapping a Join Table with Additional Columns
  • solution is to create a class that models the join table
  • requires a composite primary key
  • To make your life simpler, I would recommend adding a generated Id attribute to the association class
  • Another usage is if you have a Map relationship between two objects, with a third unrelated object or data representing the Map key
    • kuni katsuya
      kuni katsuya on 23 Oct 12
       
      eg. map key = AuthorizationContext, map value = {Subject,Role}
kuni katsuya

JPA/Hibernate Ternary Association « Fulvio Di Marco: just a personal code not... - 0 views

fdimarco.wordpress.com/...ahibernate-ternary-association

java JPA ternary n-ary association relationships

shared by kuni katsuya on 23 Oct 12 - No Cached
  • JPA/Hibernate Ternary Association
  • kuni katsuya on 23 Oct 12
     
    "JPA/Hibernate Ternary Association"
kuni katsuya

MySQL Bugs: #66777: MySQL Workbench Crashes after Catalog Diff Report on reverse engine... - 0 views

bugs.mysql.com/bug.php

MySQLWorkbench bugs crash mysql

shared by kuni katsuya on 20 Oct 12 - No Cached
  • MySQL Workbench Crashes after Catalog Diff Report on reverse engineered models
kuni katsuya

MySQL Bugs: #66777: MySQL Workbench Crashes after Catalog Diff Report on reverse engine... - 0 views

bugs.mysql.com/bug.php

MySQLWorkbench bugs crash

shared by kuni katsuya on 20 Oct 12 - No Cached
  • MySQL Workbench Crashes after Catalog Diff Report on reverse engineered models
kuni katsuya

Cyclomatic complexity - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Cyclomatic_complexity

testing CyclomaticComplexity CodeCoverage

shared by kuni katsuya on 19 Oct 12 - Cached
  • Cyclomatic complexity
  • software metric (measurement)
  • used to indicate the complexity of a program
  • ...4 more annotations...
  • measures the number of linearly independent paths through a program's source code
  • count of the number of
  • linearly independent paths
  • through the source code
kuni katsuya

Basic - Janino - Codehaus - 0 views

docs.codehaus.org/...Basic

java runtime CodeGeneration Janino

shared by kuni katsuya on 19 Oct 12 - No Cached
  • Janino as an Expression Evaluator
kuni katsuya

It's Not Just Standing Up: Patterns for Daily Standup Meetings - 0 views

martinfowler.com/...itsNotJustStandingUp.html

agile standup scrum

shared by kuni katsuya on 18 Oct 12 - Cached
  • stand-up meeting should
  • give energy
  • not take it
  • ...11 more annotations...
  • The purpose is not to meet... it is to improve.
  • Some people are talkative and tend to wander off into Story Telling
  • Some people want to engage in Problem Solving immediately
  • Other topics of discussion (e.g., design discussions, gossip, etc.) should be deferred until after the meeting.
  • questions should be reversed in order to emphasise the correct order of importance:
  • Any impediments in your way? What are you working on today? What have you finished since yesterday?
  • Fifteen Minutes or Less
  • A long, droning meeting is a
  • horrible, energy-draining way
  • to start the day
  • Signal the End
  • kuni katsuya on 18 Oct 12
     
    "stand-up meeting should"
kuni katsuya

Illegitimus Non Interruptus - Published Patterns - 0 views

sites.google.com/...illigitimus-non-interruptus

scrum agile anti-patterns

shared by kuni katsuya on 18 Oct 12 - No Cached
  • Illegitimus Non Interruptus
  • dilemma arising from the situation in which multiple individuals, acting independently and rationally consulting their own self-interest, will ultimately deplete a shared limited resource even when it is clear that it is not in anyone's long-term interest for this to happen
  • allot time for interrupts and
  • ...1 more annotation...
  • do not allow the time to be exceeded
kuni katsuya

Dell UltraSharp U2713HM 27-inch Widescreen Flat Panel Monitor with LED : Computer Compo... - 0 views

accessories.dell.com/...productdetail.aspx

dell monitor

shared by kuni katsuya on 18 Oct 12 - No Cached
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