Performance comparison between diverse Java Frameworks for Web

My favorite is still The Bestest :P

Link to the Original Presentation

Primary key @OneToOne mapping in Hibernate (JPA)

My main objective is to save/insert as many POJO's as possible with the minimum # of calls to save method. That's why I'm relate them.

But there is a special relationship which it's not clearly documented on the official documentation, and that's why you'll see this entry here :)

.The problem is that I have 2 tables COURSE_ACCESS and COURSE_ACCESS_STATUS:

---------------
COURSE_ACCESS
---------------
*id
...
---------------

---------------------
COURSE_ACCESS_STATUS
---------------------
*course_access_id
...
---------------------

The relationship is 1:1. COURSE_ACCESS is the "parent" table, because that one has the SEQUENCE which generates the PK on "id" column.

Now what I want is when I save COURSE_ACCESS, COURSE_ACCESS_DATA should be saved too. Just like this CourseAccess courseAccess = Transformer.transform(user, enrollmentDetails, accessStartDate, new CourseAccess()); CourseAccessStatus courseAccessStatus = Transformer.transform(courseAccess, new CourseAccessStatus()); courseAccess.setCourseAccessStatus(courseAccessStatus);//Persisting CourseAccessStatus into CourseAccess this.courseAccessHomeService.save(courseAccess); //Instead of 2 DAO calls
How I did it?
@Entity @Table(name = "COURSE_ACCESS") public class CourseAccess implements Serializable { @Id @Column(name = "ID", unique = true, nullable = false, insertable = true, updatable = true, length = 40) @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="courseAccessSequenceGenerator") @GenericGenerator(name = "courseAccessSequenceGenerator", strategy = "kaptest.util.domain.VarcharSequenceGenerator", parameters = {@Parameter(name = "sequence", value = "OI_SEQUENCE_NUMBER")}) private String id; … @OneToOne(cascade=CascadeType.ALL, fetch=FetchType.LAZY, targetEntity=CourseAccessStatus.class) @PrimaryKeyJoinColumn(name="ID", referencedColumnName="course_access_id") private CourseAccessStatus courseAccessStatus; }
@Entity @Table(name = "COURSE_ACCESS_STATUS") @org.hibernate.annotations.GenericGenerator(name="courseAccessFKGenerator",strategy="foreign", parameters=@org.hibernate.annotations.Parameter(name="property",value="courseAccess")) public class CourseAccessStatus implements java.io.Serializable { @Id @GeneratedValue(generator="courseAccessFKGenerator") @Column(name = "course_access_id", unique = true, nullable = false, length = 40) private String courseAccessId; … @OneToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER, targetEntity=CourseAccess.class) @PrimaryKeyJoinColumn(name="course_access_id", referencedColumnName="ID") private CourseAccess courseAccess; }

And that's it!!! Easy isn't it?

Building from source BPM Console (for JBPM4)

For some personal reasons I wanted to customize the JBPM Console, so the only way to do it is by building from source code.
The first thing I had to do is get the sources and compile them using Maven :)

If by any chance you're having a hard time with this error (like me)

[ERROR] Failed to execute goal on project gwt-console: Could not resolve dependencies for project org.jboss.bpm:gwt-console:war:2.2.3-Final: The following artifacts could not be resolved: org.timepedia.chronoscope:chronoscope:jar:2.0_jboss-SNAPSHOT, org.timepedia.chronoscope:chronoscope-api:jar:2.0_jboss-SNAPSHOT: Failure to find org.timepedia.chronoscope:chronoscope:jar:2.0_jboss-SNAPSHOT in https://repository.jboss.org/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of jboss-public-repository-group has elapsed or updates are forced -> [Help 1]

Just do as I did. Go to Maven Hub and search for your missing jar, on my case I found it on Thirdparty-uploads repository (from JBoss);

Unfortunately, the version I was looking for (according to the previous error) was chronoscope:jar:2.0_jboss-SNAPSHOT and I found 2.0_jboss, I guess you know what to do now, don't you?

Just cheat Maven by installing on your local repository version "2.0_jboss" as "2.0_jboss-SNAPSHOT"

Voila!!!

As result you should get these 4 artifacts:

• Console UI: gwt-console.war
• Console Server: gwt-console-server.war
• Domain model: gwt-console-rpc.jar
• Integration Layer: gwt-console-server-integration.jar

Also, don't forget to include the bpaf-explorer jars. To avoid this:

14:52:32,728 [main] ERROR [ContainerBase] StandardWrapper.Throwable
com.google.inject.ProvisionException: Guice provision errors:

1) Error injecting constructor, java.lang.NoClassDefFoundError: org/jboss/bpm/monitor/model/metric/Timespan
  at org.jboss.errai.bus.server.service.ErraiServiceImpl.(ErraiServiceImpl.java:50)
  while locating org.jboss.errai.bus.server.service.ErraiServiceImpl
  while locating org.jboss.errai.bus.server.service.ErraiService

1 error
 at com.google.inject.InjectorImpl$4.get(InjectorImpl.java:767)
 at com.google.inject.InjectorImpl.getInstance(InjectorImpl.java:793)
 at org.jboss.errai.bus.server.servlet.AbstractErraiServlet.buildService(AbstractErraiServlet.java:117)
 at org.jboss.errai.bus.server.servlet.AbstractErraiServlet.init(AbstractErraiServlet.java:88)
 at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)