final String cacheRole = par.getParameter("cache-role", Cache.ROLE);
Cache cache = null;
try {
cache = (Cache)this.manager.lookup(cacheRole);
cache.clear();
return EMPTY_MAP;
} catch (Exception ex) {
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("Exception while trying to clear Cache with role " + cacheRole, ex);
}