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Contents contributed and discussions participated by kuni katsuya

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kuni katsuya

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

en.wikibooks.org/...Runtime

jpa runtime javaee javaee6 SessionBean injection EntityManager

shared by kuni katsuya on 17 Jul 12 - No Cached
  • In JEE the EntityManager or EntityManagerFactory can
  • injected into a SessionBean
  • A managed EntityManager should never be closed, and integrates with JTA transactions
  • ...3 more annotations...
  • Example of injecting an EntityManager and EntityManagerFactory in a SessionBean
  • @Stateless
  • @PersistenceContext(unitName="acme") private EntityManager entityManager;
kuni katsuya

MySQL :: MySQL 5.1 Reference Manual :: 21.3.5.2 JDBC API Implementation Notes - 0 views

dev.mysql.com/...ence-implementation-notes.html

mysql jdbc configuration

shared by kuni katsuya on 17 Jul 12 - No Cached
  • Connection
  • If you need to determine if the connection is still valid, issue a simple query, such as SELECT 1. The driver will throw an exception if the connection is no longer valid.
kuni katsuya

MySQL :: MySQL 5.1 Reference Manual :: 21.3.5.1 Driver/Datasource Class Names, URL Synt... - 0 views

dev.mysql.com/...-configuration-properties.html

mysql jdbc configuration

shared by kuni katsuya on 17 Jul 12 - Cached
  • The name of the class that implements java.sql.Driver in MySQL Connector/J is com.mysql.jdbc.Driver
  • JDBC URL Format The JDBC URL format for MySQL Connector/J is as follows, with items in square brackets ([, ]) being optional: jdbc:mysql://[host][,failoverhost...][:port]/[database] » [?propertyName1][=propertyValue1][&propertyName2][=propertyValue2]... If the host name is not specified, it defaults to 127.0.0.1. If the port is not specified, it defaults to 3306, the default port number for MySQL servers. jdbc:mysql://[host:port],[host:port].../[database] » [?propertyName1][=propertyValue1][&propertyName2][=propertyValue2]... Here is a sample connection URL: jdbc:mysql://localhost:3306/sakila?profileSQL=true
  • Initial Database for Connection If the database is not specified, the connection is made with no default database
  • ...2 more annotations...
  • fully specify table names using the database name (that is, SELECT dbname.tablename.colname FROM dbname.tablename...) in your SQL
  • work with multiple databases
    • kuni katsuya
      kuni katsuya on 17 Jul 12
       
      including cross database joins
kuni katsuya

In Relation To...  Updated OGM kitchensink example - 0 views

in.relation.to/...UpdatedOGMKitchensinkExample

jboss jbossas7 maven cargo

shared by kuni katsuya on 14 Jul 12 - No Cached
  • jboss-as-maven-plugin to deploy the webapp. Unfortunately, this plugin does not allow me to start and stop the server and it seems redundant to require a local install if the Arquillian tests already download an AS instance (yes, I could run the test against the local instance as well, but think for example continuous integration where I want to manage/control the WHOLE ENVIRONMENT).
  • cargo plugin another go. A lot has happened there and it supports not only JBoss 7.x, but it also offers a so called artifact installer which allows to download the app server as a managed maven dependency.
  • cargo:install in the initialize phase to install the app server into the target directory. This way I can install a custom module (via the gmaven plugin) before the tests get executed and/or before I start the application
kuni katsuya

Part 3 of dependency injection in Java EE 6 - 1 views

www.theserverside.com/...endency-injection-in-Java-EE-6

javaee6 cdi

shared by kuni katsuya on 13 Jul 12 - Cached
  • powerful way of formalizing the recurring bean roles that often arise as a result of application architectural patterns
kuni katsuya

Enterprise JavaBeans 3.1 with Contexts and Dependency Injection: The Perfect Synergy - 0 views

www.oracle.com/...ejb-3-1-175064.html

javaee6 ejb3.1 cdi

shared by kuni katsuya on 12 Jul 12 - No Cached
  • stateless EJB 3.1 bean as boundary (Facade)
  • injected managed beans (controls)
  • @Inject
  • ...22 more annotations...
  • @Inject
  • CDI managed beans. The @EJB annotation is removed and @Inject is used instead
  • Annotating the boundary (Cart) with the @Named annotation makes the Cart immediately visible for expression language (EL) expressions in JSP and JSF
  • @Named annotation takes the simple name of the annotated class, puts the first character in lowercase, and exposes it directly to the JSF pages (or JSP). The Cart bean can be accessed directly, without any backed or managed beans, by the JSF pages: <h:commandButton value="Check out!" action="#{cart.checkout}" />
  • If there is a need for abstraction, the class can be turned into an interface (or abstract class)
  • local implementation (with CDI events
  • @Inject Event<String> event;
  • event.fire("Order proceeded!");
  • remote implementation:
  • javax.enterprise.event.Event belongs to the CDI-implementation
  • class Event can be considered to be a lightweight alternative to the java.beans.PropertyChangeSupport class
  • @Inject Event<String> event;
  • event.fire("Order proceeded!");
  • event can be received by any managed bean and also by EJB beans
  • provide a method with a single @Observes annotated parameter
  • @Observes String event
  • there is no real event, just the payload:
  • The during attribute in the @Observes annotation allows you to select in which transactional phase the event gets delivered. The default setting is IN_PROGRESS, which causes an immediate event delivery regardless of the transaction outcome. The AFTER_SUCCESS configuration causes the delivery to occur only after successful transaction completion
  • Although CDI events work only inside a single process (in the default case, CDI is extensible), they are perfectly suitable for decoupling packages from modules
  • The method checkout() starts a transaction that gets "reused" by the OrderSystem and CustomerNotification session beans
  • ordering.placeOrder(); notifier.sendNotification();
    • kuni katsuya
      kuni katsuya on 18 Jul 12
       
      both run within same transaction
  • EJB beans cannot be directly exposed to JSF or JSP without a little help from CDI
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