public void init(WebApp wapp) throws Exception {
if (DHtmlUpdateServlet.getAuExtension(wapp, URI_PREFIX) == null) {
try {
DHtmlUpdateServlet.addAuExtension(wapp, URI_PREFIX, this);
} catch (Throwable ex) {
log.error("could not initialize AuRedirect extension", ex);
throw new IllegalStateException("could not initialize AuRedirect extension", ex);
}
}
}
/**
* Returns the AU extension that is associated the specified prefix.
*
* @since 5.0.0
*/
public static final AuExtension getAuExtension(WebApp wapp, String prefix) {
DHtmlUpdateServlet upsv = DHtmlUpdateServlet.getUpdateServlet(wapp);
if (upsv == null) {
synchronized (DHtmlUpdateServlet.class) {
upsv = DHtmlUpdateServlet.getUpdateServlet(wapp);
if (upsv == null) {
Map aues = (Map) wapp.getAttribute(ATTR_AU_PROCESSORS);
return aues != null ? (AuExtension) aues.get(prefix) : null;
}
}
}
return upsv.getAuExtension(prefix);
}