User: mgroot
Date: 01/01/24 12:35:27
Added: src/main/org/jboss/util AutoNumberHome.java
AutoNumberEJB.java AutoNumberFactory.java
AutoNumber.java
Log:
Autonumber utility classes & EJB
Revision Changes Path
1.1 jboss/src/main/org/jboss/util/AutoNumberHome.java
Index: AutoNumberHome.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.util;
import javax.ejb.EJBHome;
import javax.ejb.CreateException;
import javax.ejb.FinderException;
import java.rmi.RemoteException;
/*
* @author <a href="mailto:[EMAIL PROTECTED]">Michel de Groot</a>
* @version $Revision: 1.1 $
*/
public interface AutoNumberHome extends EJBHome {
/**
* Creates an AutoNumber of given name.
* @param name the name of the AutoNumber
*/
public AutoNumber create(String name) throws CreateException, RemoteException;
/**
* Finds an AutoNumber by its name.
*/
public AutoNumber findByPrimaryKey(String name) throws FinderException,
RemoteException;
}
1.1 jboss/src/main/org/jboss/util/AutoNumberEJB.java
Index: AutoNumberEJB.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.util;
import javax.ejb.EntityBean;
import javax.naming.InitialContext;
/*
* @author <a href="mailto:[EMAIL PROTECTED]">Michel de Groot</a>
* @version $Revision: 1.1 $
*/
public class AutoNumberEJB implements EntityBean {
public String name;
public Integer value;
public String ejbCreate(String name) {
this.name = name;
this.value = new Integer(0);
return null;
}
public void ejbPostCreate(String name) {}
public Integer getValue() {
return value;
}
public void setValue(Integer value) {
this.value = value;
}
public void ejbActivate() {}
public void ejbPassivate() {}
public void ejbLoad() {}
public void ejbStore() {}
public void ejbRemove() {}
public void setEntityContext(javax.ejb.EntityContext ec) {}
public void unsetEntityContext() {}
}
1.1 jboss/src/main/org/jboss/util/AutoNumberFactory.java
Index: AutoNumberFactory.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.util;
import javax.naming.InitialContext;
/**
* AutoNumberFactory can persistently auto number items.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Michel de Groot</a>
* @version $Revision: 1.1 $
*/
public class AutoNumberFactory {
private static AutoNumberHome autoNumberHome;
/**
* Gets the next key for the given collection.
* Note 1: you must deploy EJB AutoNumber
* Note 2: the keys are persistent in your database, independent of
* the actual table
* Note 3: you can only add instances to the collection which have a
* key generated by this method, otherwise the keys are not guaranteed
* to be unique
* Note 4: key values are >= 0
* @param collectionName the name of the collection for which you want an
autonumber
* @throws ArrayIndexOutOfBoundsException if no more numbers are available
*/
public static Integer getNextInteger(String collectionName) throws
ArrayIndexOutOfBoundsException {
Integer value = null;
AutoNumber autoNumber = null;
if (autoNumberHome == null) {
try {
autoNumberHome = (AutoNumberHome)new
InitialContext().lookup("JBossUtilAutoNumber");
} catch (javax.naming.NamingException e) {
e.printStackTrace();
}
}
try {
autoNumber =
(AutoNumber)autoNumberHome.findByPrimaryKey(collectionName);
} catch (javax.ejb.FinderException e) {
// autonumber does not exist yet, create one at value 0
try {
autoNumber = autoNumberHome.create(collectionName);
} catch (javax.ejb.CreateException e11) {
e11.printStackTrace();
} catch (java.rmi.RemoteException e12) {
e12.printStackTrace();
}
try {
autoNumber.setValue(new Integer(0));
} catch (java.rmi.RemoteException e21) {
e21.printStackTrace();
}
} catch (java.rmi.RemoteException e2) {
e2.printStackTrace();
}
try {
value = autoNumber.getValue();
autoNumber.setValue(new Integer(value.intValue()+1));
} catch (java.rmi.RemoteException e) {
e.printStackTrace();
}
return value;
}
/**
* Resets the given autonumber to zero.
* Use with extreme care!
*/
public static void resetAutoNumber(String collectionName) {
setAutoNumber(collectionName,new Integer(0));
}
/**
* Sets the given autonumber to the given value so that it starts
* counting at the given value.
* Use with extreme care!
*/
public static void setAutoNumber(String collectionName, Integer value) {
AutoNumber autoNumber = null;
if (autoNumberHome == null) {
try {
autoNumberHome = (AutoNumberHome)new
InitialContext().lookup("JBossUtilAutoNumber");
} catch (javax.naming.NamingException e) {
e.printStackTrace();
}
}
try {
autoNumber =
(AutoNumber)autoNumberHome.findByPrimaryKey(collectionName);
} catch (javax.ejb.FinderException e) {
// autonumber does not exist yet, create one
try {
autoNumber = autoNumberHome.create(collectionName);
} catch (javax.ejb.CreateException e11) {
e11.printStackTrace();
} catch (java.rmi.RemoteException e12) {
e12.printStackTrace();
}
} catch (java.rmi.RemoteException e2) {
e2.printStackTrace();
}
try {
autoNumber.setValue(value);
} catch (java.rmi.RemoteException e) {
e.printStackTrace();
}
}
}
1.1 jboss/src/main/org/jboss/util/AutoNumber.java
Index: AutoNumber.java
===================================================================
/*
* JBoss, the OpenSource EJB server
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package org.jboss.util;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
/**
* AutoNumber stores autonumbers for items in a collection.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Michel de Groot</a>
* @version $Revision: 1.1 $
*/
public interface AutoNumber extends EJBObject {
/**
* Gets the current value of the autonumber.
*/
public Integer getValue() throws RemoteException;
/**
* Sets the current value of the autonumber.
*/
public void setValue(Integer value) throws RemoteException;
}
