Setup for callback module
==================
private Dao infoData = null; // defined in spring
DetailCallback callBack = new DetailCallback("function1");
infoData.getInfoData(searchKey, callBack);
Set<DataStored> dataStored = callBack.getDataStored();
Calling callback module
==================
public abstract class Prototype implements java.io.Serializable {
private static final long serialVersionUID = 1L;
}
public interface Dao {
public List getInfoData(Long searchKey, ResultCallback callback);
}
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Example;
import org.hibernate.criterion.Expression;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projection;
import org.hibernate.criterion.ProjectionList;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class hibernateCall implements Dao {
protected final Log log = LogFactory.getLog(getClass());
private String className = null; // defined in spring. see below
private Class<?> classE;
private CriteriaBuilder criteriaBuilder; // defined in spring. see below
public void setClassName(String className) {
this.className = className;
try {
this.classE = Class.forName(className);
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
public String getclassName() {
return entityclassName;
}
public Class<?> getClassC() {
return classE;
}
/** default constructor */
public DaoHibernate() {
}
public void save(Prototype obj) {
getHibernateTemplate().saveOrUpdate(obj);
}
public void delete(Prototype obj) {
getHibernateTemplate().delete(obj);
}
public List getInfoData(Long searchKey, ResultCallback callback) {
return (List) getHibernateTemplate().execute(getDataCallBack(caseId, callback));
}
//~ Callback
private HibernateCallback getDataCallBack(final Long searchKey, final ResultCallback resultCallback) {
return new HibernateCallback() {
public List doInHibernate(Session session) throws HibernateException {
List results = null;
try
{
Criteria criteria =
session.createCriteria(entityClass);
criteria.add(Restrictions.eq("searchKey",searchKey));
results = criteria.list();
if ((results == null) || (results.size() == 0))
return
null;
int noOfResponses =
results.size();
for (int ii = 0;
ii<noOfResponses; ii++)
{
Prototype prototype = (Prototype)
results.get(ii);
resultCallback.execute(prototype);
}
}
catch (Exception e)
{
log.error("Error getting data" + searchKey +
"::" + e);
results = null;
}
return results;
}
};
}
}
CallBack method module
===================
public class DetailCallback implements ResultCallback {
private DataStored [] dataStored = null;
private String type = null;
public DetailCallback(String type) {
this.type = type;
this.dataStored = new HashSet<DataStored>();
}
public void execute(Prototype prototype) {
try {
getData(prototype);
} catch (Exception e) {
log.error("Error in getData--", e);
}
}
private void getData(Prototype prototype) {
DataStored dataStoredOne = new DataStoredOne();
DataBaseTable databaseTable = (DataBaseTable) prototype;
dataStoredOne.setId(databaseTable.getId);
[retrieve and store other data from different but related database tables]
addDataStored(dataStoredOne);
}
public void addDataSored(DataStored dataStoredOne) {
dataStored.add(dataStoredOne);
}
public Set<DataStored> getDataStoredSet() {
return dataStored;
}
}
Hibernate definitions and classes
======================
public class DataBaseTable extends Prototype {
private static final long serialVersionUID = 1L;
private Long searchId;
private Set<Info> infoDataDS = new HashSet<Name>(0);
public DataBaseTable() {
super();
}
public DataBaseTable(Long searchId,
Set<Info> infoDataDS) {
this.searchId = searchId;
this.infoDataDS = infoDataDS
}
public Set<Info> getInfo() {
return this.infoData;
}
public void setInfo(Set<Info> infoData) {
this.infoData = infoData;
}
XML definitions
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jun 18, 2008 4:07:00 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="path.DatabaseTable" table="DATA_BASE_TABLE">
<id name="id" type="long">
<column name="SEARCH_ID" precision="22" scale="0" />
<generator class="sequence">
<param name="sequence">SEARCH_ID_SEQ</param>
</generator>
</id>
<set name="infoDataDS" inverse="true" cascade="all" >
<key>
<column name="INFO_DATA_DS_ID" precision="22" scale="0" />
</key>
<one-to-many class="path.Info" />
</set>
</class>
</hibernate-mapping>
Spring definitions --
==============
<bean id="hibernateCall" parent="hibernateDao">
<property
name="className"><value>hibernate.database.name</value></property>
</bean>
<bean id="hibernateDao" class="classPath.DaoHibernate">
<property name="hibernateTemplate"><ref
local="hibernateTemplate"/></property>
<property name="criteriaBuilder"><ref
bean="criteriaBuilder"/></property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory"><ref local="sessionFactory"/></property>
</bean>
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<description>Hibernate session factory.</description>
<property name="dataSource" ref="dataSource"/>
<property name="mappingDirectoryLocations">
<list>
<value>classpath:/path/prototype</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop
key="hibernate.dialect">org.hibernate.dialect.OracleDialect
</prop>
<prop
key="hibernate.show_sql">false</prop>
<prop
key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider
</prop>
</props>
</property>
</bean>
<bean id="dataSource" autowire="byName" parent="jndiDataSource">
<property name="jndiName" ref="jndiName"/>
</bean>
<bean id="jndiDataSource" abstract="true" class="org.springframework.jndi.JndiObjectFactoryBean">
<description>Bean retreives a datasource
object via JNDI lookup.</description>
</bean>
<bean id="jndiName" class="java.lang.String">
<constructor-arg type="java.lang.String"
value="java:/jdbc/db"/></bean>
Database xml file
============
<datasources>
<local-tx-datasource>
<jndi-name>jdbc/db</jndi-name>
<connection-url>jdbc:oracle:thin:@100.100.100.100:1521:DatabaseName</connection-url>
<driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
<prepared-statement-cache-size>40</prepared-statement-cache-size>
<min-pool-size>25</min-pool-size>
<max-pool-size>65</max-pool-size>
<max-idle-timeout>800</max-idle-timeout>
<blocking-timeout-millis>20000</blocking-timeout-millis>
<idle-timeout-minutes>10</idle-timeout-minutes>
<security-domain>PasswordEncrypted</security-domain>
</local-tx-datasource>
<datasources>