[jboss-user] [EJB 3.0] - Re: help getting started with eclipse
wiggy
do-not-reply at jboss.com
Fri Sep 7 05:25:30 EDT 2007
I wondered about that also - but i dont think it is that, but just in case i created the table in the mysql db by hand - no difference.
In addition i've not actually deployed the code to the server - as it wont compile - so how could eclipse use the datasource when i'm not running the code ?
what i have at present is
1. hand created catalog and one table crafted by hand using mysql admin
a user account and password created and granted all rights on the catlog which i called 'embed'
2. in the AS i deployed a new JTA datasource call 'jdbc/embedDS and pointed it at the mysql url and catalog.
|
| <datasources>
| <xa-datasource>
| <jndi-name>jdbc/embedDS</jndi-name>
| <use-java-context>false</use-java-context>
| <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class >
| <xa-datasource-property name="URL">jdbc:mysql://localhost:3306/embed</xa-datasource-property>
| <user-name>embed</user-name>
| <password>embed</password>
| <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
| <max-pool-size>5</max-pool-size>
| <min-pool-size>1</min-pool-size>
| <blocking-timeout-millis>2000</blocking-timeout-millis>
| <idle-timeout-minutes>2</idle-timeout-minutes>
| <track-connection-by-tx>true</track-connection-by-tx>
| <no-tx-separate-pools>false</no-tx-separate-pools>
| <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
| <metadata>
| <type-mapping>mySQL</type-mapping>
| </metadata>
| </xa-datasource>
|
that i think is okay (cant test it yet) but it appears in the JMX console as deployed - and i wrote an external jndi lookup to get a connection on theDS and close it (no sql commands) and that didnt error.
3. I have created an EJB project in eclipse for ejb3 and perisistence facets. I've setup the persistence XML ok (i hope) in the meta inf directory and pointed it a
|
| <?xml version="1.0" encoding="UTF-8"?>
| <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
| <persistence-unit name="embedDS" transaction-type="JTA">
| <provider>org.hibernate.ejb.HibernatePersistence</provider>
| <jta-data-source>jdbc/embedDS</jta-data-source>
| <class>org.model.Message</class>
| <properties>
| <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
| <property name="hibernate.show_sql" value="true"/>
| </properties>
| </persistence-unit>
| </persistence>
|
4. I have created the entity class in org.model as
|
| package org.model;
|
| import javax.persistence.Column;
| import javax.persistence.Entity;
| import javax.persistence.GeneratedValue;
| import javax.persistence.GenerationType;
| import javax.persistence.Id;
| import javax.persistence.*;
|
| @Entity
| @Table(name="message", catalog="embed")
| public class Message
| {
| private long messageID;
| private String message;
|
| @Id
| @GeneratedValue(strategy=GenerationType.AUTO)
| @Column(name="messageID")
| public long getMessageID() {
| return messageID;
| }
|
| public void setMessageID(long messageID) {
| this.messageID = messageID;
| }
|
| public String getMessage() {
| return message;
| }
|
| public void setMessage(String message) {
| this.message = message;
| }
|
|
|
| }
|
and thats the bit that has these blessed compile errors.
Given the bean hasnt been deployed - and i have set the hibernate properties to "create-drop" the tables i cant see how the compiler could be trying to use the datasource and getting confused. It makes no difference whether i add or remove the table in mysql by hand or otherwise ?
my EJB project has the jboss4.2 jar set, including the mysql adapter jar and the the JRE 6 system library jar set.
Is there anything you can see that i'm doing stupid please
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