package org.apereo.cas.util;
import org.apache.commons.lang3.StringUtils;
import org.apereo.cas.ticket.UniqueTicketIdGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* An implementation of {@link UniqueTicketIdGenerator} that is able auto-configure
* the suffix based on the underlying host name.
* <p>In order to assist with multi-node deployments, in scenarios where CAS configuration
* and specially {@code application.properties} file is externalized, it would be ideal to simply just have one set
* of configuration files for all nodes, such that there would for instance be one {@code application.properties} file
* for all nodes. This would remove the need to copy/sync config files over across nodes, again in a
* situation where they are externalized.
* <p>The drawback is that in keeping only one {@code application.properties} file, we'd lose the ability
* to define unique {@code host.name} property values for each node as the suffix, which would assist with troubleshooting
* and diagnostics. To provide a remedy, this ticket generator is able to retrieve the {@code host.name} value directly from
* the actual node name, rather than relying on the configuration, only if one isn't specified in
* the {@code application.properties} file. </p>
*
* @author Misagh Moayyed
* @since 4.1.0
*/
public class HostNameBasedUniqueTicketIdGenerator extends DefaultUniqueTicketIdGenerator {
private static final Logger LOGGER = LoggerFactory.getLogger(HostNameBasedUniqueTicketIdGenerator.class);
/**
* Instantiates a new Host name based unique ticket id generator.
*
* @param maxLength the max length
* @param suffix the suffix
*/
public HostNameBasedUniqueTicketIdGenerator(final int maxLength, final String suffix) {
super(maxLength, determineTicketSuffixByHostName(suffix));
}
/**
* Appends the first part of the host name to the ticket id,
* so as to moderately provide a relevant unique value mapped to
* the host name AND not auto-leak infrastructure data out into the configuration and logs.
* <ul>
* <li>If the CAS node name is {@code cas-01.sso.edu} then, the suffix
* determined would just be {@code cas-01}</li>
* <li>If the CAS node name is {@code cas-01} then, the suffix
* determined would just be {@code cas-01}</li>
* </ul>
*
* @param suffix the suffix
* @return the shortened ticket suffix based on the hostname
* @since 4.1.0
*/
private static String determineTicketSuffixByHostName(final String suffix) {
if (StringUtils.isNotBlank(suffix)) {
return suffix;
}
return InetAddressUtils.getCasServerHostName();
}
/**
* The type Ticket granting ticket id generator.
*/
public static class TicketGrantingTicketIdGenerator extends HostNameBasedUniqueTicketIdGenerator {
/**
* Instantiates a new Ticket granting ticket id generator.
*
* @param maxLength the max length
* @param suffix the suffix
*/
public TicketGrantingTicketIdGenerator(final int maxLength,
final String suffix) {
super(maxLength, suffix);
}
}
/**
* The type Service ticket id generator.
*/
public static class ServiceTicketIdGenerator extends HostNameBasedUniqueTicketIdGenerator {
/**
* Instantiates a new Service ticket id generator.
*
* @param maxLength the max length
* @param suffix the suffix
*/
public ServiceTicketIdGenerator(final int maxLength,
final String suffix) {
super(maxLength, suffix);
}
}
/**
* The type Proxy ticket id generator.
*/
public static class ProxyTicketIdGenerator extends HostNameBasedUniqueTicketIdGenerator {
/**
* Instantiates a new Proxy ticket id generator.
*
* @param maxLength the max length
* @param suffix the suffix
*/
public ProxyTicketIdGenerator(final int maxLength,
final String suffix) {
super(maxLength, suffix);
}
}
}