Lets start with the persistence unit configuration for a simple Java SE application managed example.
We require access to the JConnect 5.5 JDBC driver jar or Sybase Adaptive Server Enterprise JDBC driver - usually your /sybase/jConnect-6_0/classes/jconn3.jar
org.eclipse.persistence.jpa.PersistenceProvider com.oacis.example.jpa.model.BugNumber
Minimal Source - No Transaction code (only a query at thes point) no MVC separation via Locator, ApplicationContext or any EE container managed @Session or @PersistenceContext annotions.
Note: for a complete Java EE 6 distributed application example involving JPA refer to my tutorial page at EclipseLink
public class SEClient {
// Application managed EMF and EM
private EntityManagerFactory emf = null;
private EntityManager entityManager = null;
// Reference the database specific persistence unit in persistence.xml
public static final String PU_NAME_CREATE = "sybase_remote";
private List@lt;bugnumber@gt; bugs;
private void initialize(String puName) {
Metamodel metamodel = null;
try {
// Initialize an application managed JPA emf and em via META-INF
emf = Persistence.createEntityManagerFactory(puName);
System.out.println("Metamodel: " + emf.getMetamodel());
} catch (Exception e) {
e.printStackTrace();
}
}
public void finalize() {
// close JPA
try {
if(null != entityManager) {
entityManager.close();
emf.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void connect() {
// JPA 1.0
Query query = getEntityManager().createQuery("select object(c) from BugNumber c");
try {
bugs = query.getResultList();
} catch (NoResultException nre) {
System.out.println("_collatz: " + System.currentTimeMillis() + ": server was redeployed mid-session: computeGrid is null");
}
}
public static void main(String[] args) {
SEClient client = new SEClient();
client.initialize(PU_NAME_CREATE);
client.connect();
}
public EntityManagerFactory getEmf() { return emf; }
public void setEmf(EntityManagerFactory emf) { this.emf = emf; }
public EntityManager getEntityManager() {
if(null == entityManager) {
entityManager = emf.createEntityManager();
}
return entityManager;
}
public void setEntityManager(EntityManager entityManager) { this.entityManager = entityManager; }
}
@Entity
@Table(name="JPA_BUGNUMBER")
public class BugNumber implements Serializable {
private static final long serialVersionUID = 3132063814489287035L;
@Id
// keep the sequence column name under 30 chars to avoid an ORA-00972
@SequenceGenerator(name="JPA_SEQUENCE_BUGN", sequenceName="JPA_BUGN_SEQ", allocationSize=15)
@GeneratedValue(generator="JPA_SEQUENCE_BUGN")
@Column(name="BUG_ID")
private Long id;
@Version
@Column(name="BUG_VERSION")
private int version;
@Basic
private long number;
private int priority;
private boolean assignedStatus;
private String assignedTo;
public BugNumber() { }
public BugNumber(String aNumber) {
number = Integer.parseInt(aNumber);
}
public char[] getCharDigits() {
return Long.toString(number).toCharArray();
}
public List getIntDigits() {
List digits = new ArrayList();
for(Character aChar : getCharDigits()) {
digits.add(new Integer(Character.getNumericValue(aChar.charValue())));
}
return digits;
}
public int getLastDigit() {
List numbers = getIntDigits();
return numbers.get(numbers.size() - 1);
}
public long getNumber() { return number; }
public void setNumber(long number) { this.number = number; }
public int getPriority() { return priority; }
public void setPriority(int priority) { this.priority = priority; }
public boolean isAssignedStatus() { return assignedStatus; }
public void setAssignedStatus(boolean assignedStatus) { this.assignedStatus = assignedStatus; }
public String getAssignedTo() { return assignedTo; }
public void setAssignedTo(String assignedTo) { this.assignedTo = assignedTo; }
public Long getId() { return id; }
public void setId(Long id) { this.id = id; }
public int getVersion() { return version; }
public void setVersion(int version) { this.version = version; }
}
Console Log output:
EL Finest]: 2011-05-03 09:46:19.777--ServerSession(27379847)--Thread(Thread[main,5,main])--Begin predeploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Initial; factoryCount 0 [EL Finest]: 2011-05-03 09:46:19.792--ServerSession(27379847)--Thread(Thread[main,5,main])--property=eclipselink.orm.throw.exceptions; default value=true [EL Finest]: 2011-05-03 09:46:19.824--ServerSession(27379847)--Thread(Thread[main,5,main])--property=eclipselink.jpa.uppercase-column-names; default value=false [EL Finer]: 2011-05-03 09:46:19.824--ServerSession(27379847)--Thread(Thread[main,5,main])--Searching for default mapping file in file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/ [EL Finer]: 2011-05-03 09:46:19.839--ServerSession(27379847)--Thread(Thread[main,5,main])--Searching for default mapping file in file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/ [EL Config]: 2011-05-03 09:46:19.964--ServerSession(27379847)--Thread(Thread[main,5,main])--The access type for the persistent class [class com.corp.example.jpa.model.BugNumber] is set to [FIELD]. [EL Config]: 2011-05-03 09:46:19.996--ServerSession(27379847)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.corp.example.jpa.model.BugNumber] is being defaulted to: BugNumber. [EL Config]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--The column name for element [field assignedStatus] is being defaulted to: ASSIGNEDSTATUS. [EL Config]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--The column name for element [field priority] is being defaulted to: PRIORITY. [EL Config]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--The column name for element [field assignedTo] is being defaulted to: ASSIGNEDTO. [EL Config]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--The column name for element [field number] is being defaulted to: NUMBER. [EL Finest]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--End predeploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Predeployed; factoryCount 0 [EL Finer]: 2011-05-03 09:46:20.011--Thread(Thread[main,5,main])--JavaSECMPInitializer - transformer is null. [EL Finest]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--Begin predeploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Predeployed; factoryCount 0 [EL Finest]: 2011-05-03 09:46:20.011--ServerSession(27379847)--Thread(Thread[main,5,main])--End predeploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Predeployed; factoryCount 1 [EL Finest]: 2011-05-03 09:46:20.027--ServerSession(27379847)--Thread(Thread[main,5,main])--Begin deploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Predeployed; factoryCount 1 [EL Finer]: 2011-05-03 09:46:20.042--ServerSession(27379847)--Thread(Thread[main,5,main])--Could not initialize Validation Factory. Encountered following exception: javax.validation.ValidationException: Unable to find a default provider [EL Finest]: 2011-05-03 09:46:20.042--ServerSession(27379847)--Thread(Thread[main,5,main])--property=eclipselink.logging.level; value=ALL; translated value=ALL [EL Finest]: 2011-05-03 09:46:20.042--ServerSession(27379847)--Thread(Thread[main,5,main])--property=eclipselink.logging.level; value=ALL; translated value=ALL [EL Finest]: 2011-05-03 09:46:20.042--ServerSession(27379847)--Thread(Thread[main,5,main])--property=javax.persistence.jdbc.user; value=dblfwk [EL Finest]: 2011-05-03 09:46:20.042--ServerSession(27379847)--Thread(Thread[main,5,main])--property=javax.persistence.jdbc.password; value=xxxxxx [EL Finest]: 2011-05-03 09:46:20.292--ServerSession(27379847)--Thread(Thread[main,5,main])--property=eclipselink.target-database; value=Sybase; translated value=org.eclipse.persistence.platform.database.SybasePlatform [EL Finest]: 2011-05-03 09:46:20.292--ServerSession(27379847)--Thread(Thread[main,5,main])--property=javax.persistence.jdbc.driver; value=com.sybase.jdbc3.jdbc.SybDriver [EL Finest]: 2011-05-03 09:46:20.292--ServerSession(27379847)--Thread(Thread[main,5,main])--property=javax.persistence.jdbc.url; value=jdbc:sybase:Tds:server:5000 [EL Info]: 2011-05-03 09:46:20.308--ServerSession(27379847)--Thread(Thread[main,5,main])--EclipseLink, version: Eclipse Persistence Services - 2.1 [EL Config]: 2011-05-03 09:46:20.308--ServerSession(27379847)--Connection(13366030)--Thread(Thread[main,5,main])--connecting(DatabaseLogin( platform=>SybasePlatform user name=> "user" datasource URL=> "jdbc:sybase:Tds:server:5000" )) [EL Config]: 2011-05-03 09:46:20.433--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connected: jdbc:sybase:Tds:server:5000 User: user Database: Adaptive Server Enterprise Version: Adaptive Server Enterprise/15.x/*/Fri * Driver: jConnect (TM) for JDBC (TM) Version: jConnect (TM) for JDBC(TM)/6.0x* 2010 [EL Finest]: 2011-05-03 09:46:20.433--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection acquired from connection pool [default]. [EL Finest]: 2011-05-03 09:46:20.433--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection released to connection pool [default]. [EL Finest]: 2011-05-03 09:46:20.449--ServerSession(27379847)--Thread(Thread[main,5,main])--sequencing connected, state is NoPreallocation_State [EL Finest]: 2011-05-03 09:46:20.449--ServerSession(27379847)--Thread(Thread[main,5,main])--sequence JPA_BUGN_SEQ: preallocation size 15 [EL Info]: 2011-05-03 09:46:20.48--ServerSession(27379847)--Thread(Thread[main,5,main])--file:/D:/wse/view_w36b/com.o.example.jpa.SEClient/bin/_sybase_remote login successful [EL Finest]: 2011-05-03 09:46:20.761--ServerSession(27379847)--Thread(Thread[main,5,main])--Execute query DataModifyQuery(sql="DROP TABLE JPA_BUGNUMBER") [EL Finest]: 2011-05-03 09:46:20.761--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection acquired from connection pool [default]. [EL Fine]: 2011-05-03 09:46:20.761--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--DROP TABLE JPA_BUGNUMBER [EL Fine]: 2011-05-03 09:46:20.824--ServerSession(27379847)--Thread(Thread[main,5,main])--SELECT 1 [EL Finest]: 2011-05-03 09:46:20.824--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection released to connection pool [default]. [EL Warning]: 2011-05-03 09:46:20.824--ServerSession(27379847)--Thread(Thread[main,5,main])--Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.1: org.eclipse.persistence.exceptions.DatabaseException Internal Exception: com.sybase.jdbc3.jdbc.SybSQLException: Cannot drop the table 'JPA_BUGNUMBER', because it doesn't exist in the system catalogs. Error Code: 3701 Call: DROP TABLE JPA_BUGNUMBER Query: DataModifyQuery(sql="DROP TABLE JPA_BUGNUMBER") [EL Finest]: 2011-05-03 09:46:20.824--ServerSession(27379847)--Thread(Thread[main,5,main])--Execute query DataModifyQuery(sql="CREATE TABLE JPA_BUGNUMBER (BUG_ID NUMERIC(19) IDENTITY NOT NULL, ASSIGNEDSTATUS BIT default 0 NOT NULL, ASSIGNEDTO VARCHAR(255) NULL, NUMBER NUMERIC(19) NULL, PRIORITY INTEGER NULL, BUG_VERSION INTEGER NULL, PRIMARY KEY (BUG_ID))") [EL Finest]: 2011-05-03 09:46:20.824--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection acquired from connection pool [default]. [EL Fine]: 2011-05-03 09:46:20.839--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--CREATE TABLE JPA_BUGNUMBER (BUG_ID NUMERIC(19) IDENTITY NOT NULL, ASSIGNEDSTATUS BIT default 0 NOT NULL, ASSIGNEDTO VARCHAR(255) NULL, NUMBER NUMERIC(19) NULL, PRIORITY INTEGER NULL, BUG_VERSION INTEGER NULL, PRIMARY KEY (BUG_ID)) [EL Finest]: 2011-05-03 09:46:20.933--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection released to connection pool [default]. [EL Finer]: 2011-05-03 09:46:20.949--ServerSession(27379847)--Thread(Thread[main,5,main])--Canonical Metamodel class [com.corp.example.jpa.model.BugNumber_] not found during initialization. [EL Finest]: 2011-05-03 09:46:20.949--ServerSession(27379847)--Thread(Thread[main,5,main])--End deploying Persistence Unit sybase_remote; session file:/D:/wse/view_w36b/com.corp.example.jpa.SEClient/bin/_sybase_remote; state Deployed; factoryCount 1 Metamodel: MetamodelImpl@31706449 [ 6 Types: , 1 ManagedTypes: , 1 EntityTypes: , 0 MappedSuperclassTypes: , 0 EmbeddableTypes: ] [EL Finer]: 2011-05-03 09:46:21.136--ServerSession(27379847)--Thread(Thread[main,5,main])--client acquired: 3916915 [EL Finer]: 2011-05-03 09:46:21.152--ClientSession(3916915)--Thread(Thread[main,5,main])--acquire unit of work: 19647819 [EL Finest]: 2011-05-03 09:46:21.152--UnitOfWork(19647819)--Thread(Thread[main,5,main])--Execute query ReadAllQuery(referenceClass=BugNumber sql="SELECT BUG_ID, ASSIGNEDSTATUS, ASSIGNEDTO, NUMBER, PRIORITY, BUG_VERSION FROM JPA_BUGNUMBER") [EL Finest]: 2011-05-03 09:46:21.152--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection acquired from connection pool [default]. [EL Fine]: 2011-05-03 09:46:21.152--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--SELECT BUG_ID, ASSIGNEDSTATUS, ASSIGNEDTO, NUMBER, PRIORITY, BUG_VERSION FROM JPA_BUGNUMBER [EL Finest]: 2011-05-03 09:46:21.152--ServerSession(27379847)--Connection(29194312)--Thread(Thread[main,5,main])--Connection released to connection pool [default].
1 comment:
Nice article on Eclipselink and Hibernate .. Eclipselink makes copies on write whereas Hibernate makes copies on read..
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