/////////////////////////////////////////////////////////////////////////////
//
// Project ProjectForge Community Edition
// www.projectforge.org
//
// Copyright (C) 2001-2014 Kai Reinhard (k.reinhard@micromata.de)
//
// ProjectForge is dual-licensed.
//
// This community edition is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 3 of the License.
//
// This community edition is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, see http://www.gnu.org/licenses/.
//
/////////////////////////////////////////////////////////////////////////////
package org.projectforge.ldap;
import javax.naming.NameNotFoundException;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.SearchResult;
/**
* Template for closing contexts and result properly.
* @author Kai Reinhard (k.reinhard@micromata.de)
*/
public abstract class LdapTemplate
{
private static final org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(LdapTemplate.class);
private final LdapConnector ldapConnector;
private static int openConnections = 0;
//private static int openResults = 0;
protected NamingEnumeration<SearchResult> results;
protected DirContext ctx;
public LdapTemplate(final LdapConnector ldapConnector)
{
this.ldapConnector = ldapConnector;
}
public Object excecute()
{
ctx = ldapConnector.createContext();
if (ctx != null) {
++openConnections;
}
return internalExcecute();
}
public Object excecute(final String username, final String password)
{
try {
ctx = ldapConnector.createContext(username, password);
} catch (final NamingException ex) {
log.error("While trying to connect LDAP initally: " + ex.getMessage(), ex);
throw new RuntimeException(ex);
}
return internalExcecute();
}
private Object internalExcecute()
{
results = null;
try {
return call();
} catch (final NameNotFoundException e) {
// The base context was not found.
// Just clean up and exit.
log.error(e.getMessage(), e);
return null;
} catch (final Exception e) {
log.error(e.getMessage(), e);
throw new RuntimeException(e);
} finally {
if (results != null) {
try {
results.close();
} catch (final Exception e) {
log.error(e.getMessage(), e);
// Never mind this.
}
}
if (ctx != null) {
try {
log.info("Closing LDAP connection (" + openConnections + " connections opened).");
ctx.close();
--openConnections;
} catch (final Exception e) {
log.error(e.getMessage(), e);
// Never mind this.
}
}
}
}
protected abstract Object call() throws NameNotFoundException, Exception;
}