Help in using Annotations rather than a mapping file

snelliga · **Joined:** Mon Jun 25, 2007 12:08 pm **Posts:** 8

I've tried two other forums but did not receive an answer. I'm hoping that someone on this forum might be able to help.

I am trying to learn hibernate and am trying to follow the samples in the book "Java Persistence with Hibernate" . The download examples do not include the sample code at this level; before including Entity Manager.

I was able to get HelloWorld working using a mapping file, but when I try to change the code to use Annotations I get the following error:

Code:

Exception in thread "main" org.hibernate.MappingException: Unknown entity: hello.Message

I have created the mappings in the Message.java file (see below).
I have created the mappings in hibernate.cfg.xml and in the sessionFactory.

I am using a MS-SQL database rather than the HSQLDB database which the samples shows. Other than that the code should follow the book.

I tried to include as much information as possible.

Any help or suggestions would be appreciated.

-Steve Nelligan

Hibernate version:
3.2.4 sp1

Mapping documents:

Code:

package hello;

import javax.persistence.*;

/**
* Created by IntelliJ IDEA.
* User: snelligan
* Date: Jun 21, 2007
* Time: 2:34:13 PM
*/
public class Message {

@Id
@GeneratedValue
@Column(name = "MESSAGE_ID")
private Long id;

@Column(name = "MESSAGE_TEXT")
private String text;

@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "NEXT_MESSAGE_ID")
private Message nextMessage;

protected Message() {}

public Message(String text) {
this.text = text;
}

public Long getId() {
return id;
}
private void setId(Long id) {
this.id = id;
}

public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}

public Message getNextMessage() {
return nextMessage;
}
public void setNextMessage(Message nextMessage) {
this.nextMessage = nextMessage;
}
}

#############################################

Code:

<!DOCTYPE hibernate-configuration SYSTEM
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.microsoft.jdbc.sqlserver.SQLServerDriver</property>
<property name="hibernate.connection.url">jdbc:microsoft:sqlserver://130.126.4.66:1433;databaseName=StevesTesting;SelectMethod=cursor</property>
<property name="hibernate.connection.username">snelliga</property>
<property name="hibernate.connection.password">smn-1812</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>

<!-- Use the C3P0 connection pool provider -->
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>

<!-- Show and print nice SQL on stdout -->
<property name="show_sql">true</property>
<property name="format_sql">true</property>

<!-- List of annotated classes-->
<mapping class="hello.Message"/>

</session-factory>
</hibernate-configuration>

Code between sessionFactory.openSession() and session.close():

Code:

private static SessionFactory sessionFactory;

static {
try {
// AnnotationConfiguration cfg = new AnnotationConfiguration();
// cfg.addAnnotatedClass(hello.Message.class);
// cfg.configure("hibernate.cfg.xml");
// sessionFactory = cfg.buildSessionFactory();
sessionFactory = new AnnotationConfiguration()
.addAnnotatedClass(hello.Message.class)
.configure("hibernate.cfg.xml")
.buildSessionFactory();
}
catch (Throwable ex) {
throw new ExceptionInInitializerError(ex);
}
}

Full stack trace of any exception that occurs:

Code:

07:41:12,103DEBUG DefaultSaveOrUpdateEventListener:158 - saving transient instance
Exception in thread "main" org.hibernate.MappingException: Unknown entity: hello.Message
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:550)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1338)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:98)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at hello.HelloWorld.main(HelloWorld.java:24)

Name and version of the database you are using:
MS-SQL

Debug level Hibernate log excerpt:

Code:

41:04,702 INFO Version:15 - Hibernate Annotations 3.3.0.GA
41:04,732 INFO Environment:514 - Hibernate 3.2.4.sp1
41:04,732 INFO Environment:547 - hibernate.properties not found
41:04,742 INFO Environment:681 - Bytecode provider name : cglib
41:04,742 INFO Environment:598 - using JDK 1.4 java.sql.Timestamp handling
41:04,862 INFO Configuration:1426 - configuring from resource: hibernate.cfg.xml
41:04,862 INFO Configuration:1403 - Configuration resource: hibernate.cfg.xml
41:04,973DEBUG DTDEntityResolver:38 - trying to resolve system-id [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd]
41:04,973DEBUG DTDEntityResolver:40 - recognized hibernate namespace; attempting to resolve on classpath under org/hibernate/
41:04,983DEBUG DTDEntityResolver:50 - located [http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd] in classpath
41:05,033DEBUG Configuration:1387 - hibernate.connection.driver_class=com.microsoft.jdbc.sqlserver.SQLServerDriver
41:05,033DEBUG Configuration:1387 - hibernate.connection.url=jdbc:microsoft:sqlserver://130.126.4.66:1433;databaseName=StevesTesting;SelectMethod=cursor
41:05,033DEBUG Configuration:1387 - hibernate.connection.username=snelliga
41:05,033DEBUG Configuration:1387 - hibernate.connection.password=smn-1812
41:05,033DEBUG Configuration:1387 - hibernate.dialect=org.hibernate.dialect.SQLServerDialect
41:05,033DEBUG Configuration:1387 - hibernate.c3p0.min_size=5
41:05,033DEBUG Configuration:1387 - hibernate.c3p0.max_size=20
41:05,043DEBUG Configuration:1387 - hibernate.c3p0.timeout=300
41:05,043DEBUG Configuration:1387 - hibernate.c3p0.max_statements=50
41:05,043DEBUG Configuration:1387 - hibernate.c3p0.idle_test_period=3000
41:05,043DEBUG Configuration:1387 - show_sql=true
41:05,043DEBUG Configuration:1387 - format_sql=true
41:05,043DEBUG AnnotationConfiguration:596 - null<-org.dom4j.tree.DefaultAttribute@113beb5 [Attribute: name class value "hello.Message"]
41:05,053 INFO Configuration:1541 - Configured SessionFactory: null
41:05,053DEBUG Configuration:1542 - properties: {hibernate.connection.password=smn-1812, java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, sun.boot.library.path=C:\Program Files\Java\jdk1.5.0_11\jre\bin, java.vm.version=1.5.0_11-b03, hibernate.connection.username=snelliga, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=;, java.vm.name=Java HotSpot(TM) Client VM, file.encoding.pkg=sun.io, user.country=US, sun.java.launcher=SUN_STANDARD, sun.os.patch.level=Service Pack 2, java.vm.specification.name=Java Virtual Machine Specification, user.dir=C:\IDEAProjects\JavaPersistenceWithHibernateAnnotations, java.runtime.version=1.5.0_11-b03, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, hibernate.c3p0.max_statements=50, java.endorsed.dirs=C:\Program Files\Java\jdk1.5.0_11\jre\lib\endorsed, os.arch=x86, java.io.tmpdir=C:\DOCUME~1\snelliga\LOCALS~1\Temp\, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., user.variant=, os.name=Windows XP, hibernate.c3p0.idle_test_period=3000, sun.jnu.encoding=Cp1252, hibernate.c3p0.timeout=300, java.library.path=C:\Program Files\Java\jdk1.5.0_11\bin;.;C:\WINDOWS\system32;C:\WINDOWS;c:\Program Files\Java\jdk1.5.0_11\bin;c:\oracle\oracle912\bin;C:\Program Files\Oracle\jre\1.3.1\bin;C:\Program Files\Oracle\jre\1.1.8\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Common Files\Autodesk Shared\;C:\ClarifyCRM\eFrontOffice11.5\bin;C:\ClarifyCRM\eFrontOffice11.5\ClearConfigurator\Common Files\CCAutomation;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\Program Files\Synergex\SynergyDE\Workbench\win;C:\Program Files\QuickTime\QTSystem\;C:\WINDOWS\system32\Windows System Resource Manager\bin\;C:\Program Files\Synergex\SynergyDE\connect\;C:\Program Files\Synergex\SynergyDE\dbl\bin\;C:\Program Files\MySQL\MySQL Server 5.0\bin, java.specification.name=Java Platform API 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Files\Java\jdk1.5.0_11\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.5.0_11\jre\classes, java.vendor=Sun Microsystems Inc., file.separator=\, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, sun.io.unicode.encoding=UnicodeLittle, sun.cpu.endian=little, sun.desktop=windows, sun.cpu.isalist=pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86}
41:05,053DEBUG AnnotationConfiguration:758 - Validator not present in classpath, ignoring event listener registration
41:05,063DEBUG AnnotationConfiguration:831 - Search not present in classpath, ignoring event listener registration
41:05,063DEBUG Configuration:1285 - Preparing to build session factory with filters : {}
41:05,063DEBUG AnnotationConfiguration:244 - Execute first pass mapping processing
41:05,123DEBUG AnnotationConfiguration:481 - Process hbm files
41:05,123DEBUG AnnotationConfiguration:489 - Process annotated classes
41:05,123DEBUG AnnotationConfiguration:375 - processing manytoone fk mappings
41:05,123DEBUG Configuration:1120 - processing extends queue
41:05,123DEBUG Configuration:1124 - processing collection mappings
41:05,123DEBUG Configuration:1135 - processing native query and ResultSetMapping mappings
41:05,123DEBUG Configuration:1143 - processing association property references
41:05,123DEBUG Configuration:1165 - processing foreign key constraints
41:05,123 INFO AnnotationConfiguration:350 - Hibernate Validator not found: ignoring
41:05,133 INFO C3P0ConnectionProvider:81 - C3P0 using driver: com.microsoft.jdbc.sqlserver.SQLServerDriver at URL: jdbc:microsoft:sqlserver://130.126.4.66:1433;databaseName=StevesTesting;SelectMethod=cursor
41:05,133 INFO C3P0ConnectionProvider:82 - Connection properties: {user=snelliga, password=****}
41:05,133 INFO C3P0ConnectionProvider:85 - autocommit mode: false
41:05,774DEBUG SettingsFactory:347 - could not get database version from JDBC metadata
41:05,774 INFO SettingsFactory:89 - RDBMS: Microsoft SQL Server, version: Microsoft SQL Server 2000 - 8.00.760 (Intel X86)
Dec 17 2002 14:22:05
Copyright (c) 1988-2003 Microsoft Corporation
Standard Edition on Windows NT 5.2 (Build 3790: Service Pack 1)

41:05,774 INFO SettingsFactory:90 - JDBC driver: SQLServer, version: 2.2.0037
41:05,804 INFO Dialect:152 - Using dialect: org.hibernate.dialect.SQLServerDialect
41:05,914 INFO TransactionFactoryFactory:31 - Using default transaction strategy (direct JDBC transactions)
41:05,924 INFO TransactionManagerLookupFactory:33 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
41:05,924 INFO SettingsFactory:143 - Automatic flush during beforeCompletion(): disabled
41:05,924 INFO SettingsFactory:147 - Automatic session close at end of transaction: disabled
41:05,924 INFO SettingsFactory:162 - Scrollable result sets: enabled
41:05,924DEBUG SettingsFactory:166 - Wrap result sets: disabled
41:05,924 INFO SettingsFactory:170 - JDBC3 getGeneratedKeys(): disabled
41:05,924 INFO SettingsFactory:178 - Connection release mode: auto
41:05,934 INFO SettingsFactory:205 - Default batch fetch size: 1
41:05,934 INFO SettingsFactory:209 - Generate SQL with comments: disabled
41:05,934 INFO SettingsFactory:213 - Order SQL updates by primary key: disabled
41:05,934 INFO SettingsFactory:217 - Order SQL inserts for batching: disabled
41:05,934 INFO SettingsFactory:386 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
41:05,934 INFO ASTQueryTranslatorFactory:24 - Using ASTQueryTranslatorFactory
41:05,934 INFO SettingsFactory:225 - Query language substitutions: {}
41:05,934 INFO SettingsFactory:230 - JPA-QL strict compliance: disabled
41:05,934 INFO SettingsFactory:235 - Second-level cache: enabled
41:05,934 INFO SettingsFactory:239 - Query cache: disabled
41:05,934 INFO SettingsFactory:373 - Cache provider: org.hibernate.cache.NoCacheProvider
41:05,934 INFO SettingsFactory:254 - Optimize cache for minimal puts: disabled
41:05,934 INFO SettingsFactory:263 - Structured second-level cache entries: disabled
41:05,944DEBUG SQLExceptionConverterFactory:52 - Using dialect defined converter
41:05,954 INFO SettingsFactory:283 - Echoing all SQL to stdout
41:05,954 INFO SettingsFactory:290 - Statistics: disabled
41:05,954 INFO SettingsFactory:294 - Deleted entity synthetic identifier rollback: disabled
41:05,954 INFO SettingsFactory:309 - Default entity-mode: pojo
41:05,954 INFO SettingsFactory:313 - Named query checking : enabled
41:06,014 INFO SessionFactoryImpl:161 - building session factory
41:06,024DEBUG SessionFactoryImpl:173 - Session factory constructed with filter configurations : {}
41:06,024DEBUG SessionFactoryImpl:177 - instantiating session factory with properties: {java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, hibernate.connection.password=smn-1812, sun.boot.library.path=C:\Program Files\Java\jdk1.5.0_11\jre\bin, java.vm.version=1.5.0_11-b03, hibernate.connection.username=snelliga, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=;, java.vm.name=Java HotSpot(TM) Client VM, file.encoding.pkg=sun.io, user.country=US, sun.java.launcher=SUN_STANDARD, sun.os.patch.level=Service Pack 2, java.vm.specification.name=Java Virtual Machine Specification, user.dir=C:\IDEAProjects\JavaPersistenceWithHibernateAnnotations, java.runtime.version=1.5.0_11-b03, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, java.endorsed.dirs=C:\Program Files\Java\jdk1.5.0_11\jre\lib\endorsed, os.arch=x86, hibernate.c3p0.max_statements=50, java.io.tmpdir=C:\DOCUME~1\snelliga\LOCALS~1\Temp\, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., user.variant=, os.name=Windows XP, hibernate.c3p0.idle_test_period=3000, sun.jnu.encoding=Cp1252, hibernate.c3p0.timeout=300, java.library.path=C:\Program Files\Java\jdk1.5.0_11\bin;.;C:\WINDOWS\system32;C:\WINDOWS;c:\Program Files\Java\jdk1.5.0_11\bin;c:\oracle\oracle912\bin;C:\Program Files\Oracle\jre\1.3.1\bin;C:\Program Files\Oracle\jre\1.1.8\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Common Files\Autodesk Shared\;C:\ClarifyCRM\eFrontOffice11.5\bin;C:\ClarifyCRM\eFrontOffice11.5\ClearConfigurator\Common Files\CCAutomation;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\Program Files\Synergex\SynergyDE\Workbench\win;C:\Program Files\QuickTime\QTSystem\;C:\WINDOWS\system32\Windows System Resource Manager\bin\;C:\Program Files\Synergex\SynergyDE\connect\;C:\Program Files\Synergex\SynergyDE\dbl\bin\;C:\Program Files\MySQL\MySQL Server 5.0\bin, java.specification.name=Java Platform API 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41:06,034DEBUG SessionFactoryObjectFactory:39 - initializing class SessionFactoryObjectFactory
41:06,034DEBUG SessionFactoryObjectFactory:76 - registered: 02fe864b13680ca60113680ca6e80000 (unnamed)
41:06,034 INFO SessionFactoryObjectFactory:82 - Not binding factory to JNDI, no JNDI name configured
41:06,034DEBUG SessionFactoryImpl:308 - instantiated session factory
41:06,034DEBUG SessionFactoryImpl:392 - Checking 0 named HQL queries
41:06,034DEBUG SessionFactoryImpl:412 - Checking 0 named SQL queries
41:06,134DEBUG SessionImpl:220 - opened session at timestamp: 11828616660
41:06,134DEBUG JDBCTransaction:54 - begin
41:06,134DEBUG ConnectionManager:421 - opening JDBC connection
41:06,144DEBUG JDBCTransaction:59 - current autocommit status: false
41:06,144DEBUG JDBCContext:210 - after transaction begin
41:12,103DEBUG DefaultSaveOrUpdateEventListener:158 - saving transient instance

Torax · **Joined:** Thu Jun 21, 2007 8:01 am **Posts:** 5

I myself are at the very beginning of diving into Hibernate, so i might be uterly wrong here ;)

Should your Code not contain an @Entity Annotation for the Message Class?

Code:

<snip>
/**
* Created by IntelliJ IDEA.
* User: snelligan
* Date: Jun 21, 2007
* Time: 2:34:13 PM
*/
@Entity
@Table (name = "MESSAGE")
public class Message {
<snipp>

Hope it helps.