TorqueAbstractGroupManager.java
package org.apache.fulcrum.security.torque;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.sql.Connection;
import java.util.List;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.fulcrum.security.entity.Group;
import org.apache.fulcrum.security.spi.AbstractGroupManager;
import org.apache.fulcrum.security.torque.security.TorqueAbstractSecurityEntity;
import org.apache.fulcrum.security.util.DataBackendException;
import org.apache.fulcrum.security.util.EntityExistsException;
import org.apache.fulcrum.security.util.GroupSet;
import org.apache.fulcrum.security.util.UnknownEntityException;
import org.apache.torque.NoRowsException;
import org.apache.torque.TooManyRowsException;
import org.apache.torque.TorqueException;
import org.apache.torque.util.Transaction;
/**
* This implementation persists to a database via Torque.
*
* @author <a href="mailto:tv@apache.org">Thomas Vandahl</a>
* @version $Id:$
*/
public abstract class TorqueAbstractGroupManager extends AbstractGroupManager implements LazyLoadable
{
/** Serial version */
private static final long serialVersionUID = -3735730556110100621L;
private static final String LAZY_LOADING = "lazy";
protected Boolean lazyLoading = false;
/**
* Avalon Service lifecycle method
*/
@Override
public void configure(Configuration conf) throws ConfigurationException
{
super.configure( conf );
lazyLoading = conf.getAttributeAsBoolean( LAZY_LOADING, false);
getLogger().debug("setting lazyLoading: " + lazyLoading);
}
/**
* Get all specialized Groups
*
* @param con a database connection
*
* @return a List of Group instances
*
* @throws TorqueException if any database error occurs
*/
protected abstract <T extends Group> List<T> doSelectAllGroups(Connection con)
throws TorqueException;
/**
* Get a specialized Group by name
*
* @param name the name of the group
* @param con a database connection
*
* @return a Group instance
*
* @throws NoRowsException if no such group exists
* @throws TooManyRowsException if multiple groups with the given name exist
* @throws TorqueException if any database error occurs if any other database error occurs
*/
protected abstract <T extends Group> T doSelectByName(String name, Connection con)
throws NoRowsException, TooManyRowsException, TorqueException;
/**
* Get a specialized Group by id
*
* @param id the id of the group
* @param con a database connection
*
* @return a Group instance
*
* @throws NoRowsException if no such group exists
* @throws TooManyRowsException if multiple groups with the given id exist
* @throws TorqueException if any database error occurs if any other database error occurs
*/
protected abstract <T extends Group> T doSelectById(Integer id, Connection con)
throws NoRowsException, TooManyRowsException, TorqueException;
/**
* Creates a new group with specified attributes.
*
* @param group the object describing the group to be created.
* @return a new Group object that has id set up properly.
* @throws DataBackendException if there was an error accessing the data
* backend.
*/
@Override
protected synchronized <T extends Group> T persistNewGroup(T group) throws DataBackendException
{
try
{
((TorqueAbstractSecurityEntity)group).save();
}
catch (Exception e)
{
throw new DataBackendException("Adding Group '" + group.getName() + "' failed", e);
}
return group;
}
/**
* Renames an existing Group.
*
* @param group The object describing the group to be renamed.
* @param name the new name for the group.
* @throws DataBackendException if there was an error accessing the data
* backend.
* @throws UnknownEntityException if the group does not exist.
*/
@Override
public synchronized void renameGroup(Group group, String name) throws DataBackendException, UnknownEntityException
{
if (checkExists(group))
{
group.setName(name);
try
{
TorqueAbstractSecurityEntity g = (TorqueAbstractSecurityEntity)group;
g.setNew(false);
g.save();
}
catch (Exception e)
{
throw new DataBackendException("Renaming Group '" + group.getName() + "' failed", e);
}
}
else
{
throw new UnknownEntityException("Unknown group '" + group.getName() + "'");
}
}
/**
* Removes a Group from the system.
*
* @param group The object describing the group to be removed.
* @throws DataBackendException if there was an error accessing the data
* backend.
* @throws UnknownEntityException if the group does not exist.
*/
@Override
public synchronized void removeGroup(Group group) throws DataBackendException, UnknownEntityException
{
try
{
((TorqueAbstractSecurityEntity)group).delete();
}
catch (TorqueException e)
{
throw new DataBackendException("Removing Group '" + group.getName() + "' failed", e);
}
}
/**
* Retrieve a Group object with specified name.
*
* @param name the name of the Group.
* @return an object representing the Group with specified name.
* @throws DataBackendException if there was an error accessing the
* data backend.
* @throws UnknownEntityException if the group does not exist.
*/
@Override
public <T extends Group> T getGroupByName(String name) throws DataBackendException, UnknownEntityException
{
T group = null;
Connection con = null;
try
{
con = Transaction.begin();
group = doSelectByName(name, con);
// Add dependent objects if they exist
((TorqueAbstractSecurityEntity)group).retrieveAttachedObjects(con, getLazyLoading());
Transaction.commit(con);
con = null;
}
catch (NoRowsException e)
{
throw new UnknownEntityException("Could not find group " + name);
}
catch (TooManyRowsException e)
{
throw new DataBackendException("Multiple Groups with same name '" + name + "'");
}
catch (TorqueException e)
{
throw new DataBackendException("Error retrieving group information", e);
}
finally
{
if (con != null)
{
Transaction.safeRollback(con);
}
}
return group;
}
/**
* Retrieves all groups defined in the system.
*
* @return the names of all groups defined in the system.
* @throws DataBackendException if there was an error accessing the
* data backend.
*/
@Override
public GroupSet getAllGroups() throws DataBackendException
{
GroupSet groupSet = new GroupSet();
Connection con = null;
try
{
con = Transaction.begin();
List<Group> groups = doSelectAllGroups(con);
for (Group group : groups)
{
// Add dependent objects if they exist
((TorqueAbstractSecurityEntity)group).retrieveAttachedObjects(con, getLazyLoading());
groupSet.add(group);
}
Transaction.commit(con);
con = null;
}
catch (TorqueException e)
{
throw new DataBackendException("Error retrieving group information", e);
}
finally
{
if (con != null)
{
Transaction.safeRollback(con);
}
}
return groupSet;
}
/**
* Determines if the <code>Group</code> exists in the security system.
*
* @param groupName a <code>Group</code> value
* @return true if the group name exists in the system, false otherwise
* @throws DataBackendException when more than one Group with
* the same name exists.
*/
@Override
public boolean checkExists(String groupName) throws DataBackendException
{
boolean exists = false;
Connection con = null;
try
{
con = Transaction.begin();
doSelectByName(groupName, con);
Transaction.commit(con);
con = null;
exists = true;
}
catch (NoRowsException e)
{
exists = false;
}
catch (TooManyRowsException e)
{
throw new DataBackendException(
"Multiple groups with same name '" + groupName + "'");
}
catch (TorqueException e)
{
throw new DataBackendException("Error retrieving group information", e);
}
finally
{
if (con != null)
{
Transaction.safeRollback(con);
}
}
return exists;
}
/**
* Retrieve a Group object with specified id.
*
* @param id
* the id of the Group.
* @return an object representing the Group with specified id.
* @throws DataBackendException
* if there was an error accessing the data backend.
* @throws UnknownEntityException
* if the group does not exist.
*/
@Override
public <T extends Group> T getGroupById(Object id) throws DataBackendException, UnknownEntityException
{
T group;
if (id != null && id instanceof Integer)
{
Connection con = null;
try
{
con = Transaction.begin();
group = doSelectById((Integer)id, con);
// Add dependent objects if they exist
((TorqueAbstractSecurityEntity)group).retrieveAttachedObjects(con, getLazyLoading());
Transaction.commit(con);
con = null;
}
catch (NoRowsException e)
{
throw new UnknownEntityException("Group with id '" + id + "' does not exist.", e);
}
catch (TorqueException e)
{
throw new DataBackendException("Error retrieving group information", e);
}
finally
{
if (con != null)
{
Transaction.safeRollback(con);
}
}
}
else
{
throw new UnknownEntityException("Invalid group id '" + id + "'");
}
return group;
}
public Boolean getLazyLoading()
{
return lazyLoading;
}
public void setLazyLoading( Boolean lazyLoading )
{
this.lazyLoading = lazyLoading;
}
}