public void init() throws ServletException {
int maxWaitSeconds = 5; // a default
try {
ServletContext context = getServletContext();
// init engine reference
_engine = (EngineGateway) context.getAttribute("engine");
if (_engine == null) {
Class<? extends YEngine> engineImpl = getEngineImplClass();
boolean persist = getBooleanFromContext("EnablePersistence");
boolean enableHbnStats = getBooleanFromContext("EnableHibernateStatisticsGathering");
_engine = new EngineGatewayImpl(engineImpl, persist, enableHbnStats);
_engine.setActualFilePath(context.getRealPath("/"));
context.setAttribute("engine", _engine);
}
// set flag to disable logging (only if false) - enabled with persistence by
// default
String logStr = context.getInitParameter("EnableLogging");
if ((logStr != null) && logStr.equalsIgnoreCase("false")) {
_engine.disableLogging();
}
// add the reference to the default worklist
_engine.setDefaultWorklist(context.getInitParameter("DefaultWorklist"));
// set flag for generic admin account (only if set to true)
String allowAdminID = context.getInitParameter("AllowGenericAdminID");
if ((allowAdminID != null) && allowAdminID.equalsIgnoreCase("true")) {
_engine.setAllowAdminID(true);
}
// set the path to external db gateway plugin classes (if any)
String pluginPath = context.getInitParameter("ExternalPluginsPath");
ExternalDBGatewayFactory.setExternalPaths(pluginPath);
PredicateEvaluatorFactory.setExternalPaths(pluginPath);
// override the max time that initialisation events wait for between
// final engine init and server start completion
int maxWait =
StringUtil.strToInt(context.getInitParameter("InitialisationAnnouncementTimeout"), -1);
if (maxWait >= 0) maxWaitSeconds = maxWait;
// read the current version properties
_engine.initBuildProperties(
context.getResourceAsStream("/WEB-INF/classes/version.properties"));
// init any 3rd party observer gateways
String gatewayStr = context.getInitParameter("ObserverGateway");
if (gatewayStr != null) {
// split multiples on the semi-colon (if any)
for (String gateway : gatewayStr.split(";")) {
registerObserverGateway(gateway);
}
}
} catch (YPersistenceException e) {
_log.fatal("Failure to initialise runtime (persistence failure)", e);
throw new UnavailableException("Persistence failure");
}
if (_engine != null) {
_engine.notifyServletInitialisationComplete(maxWaitSeconds);
} else {
_log.fatal(
"Failed to initialise Engine (unspecified failure). Please "
+ "consult the logs for details");
throw new UnavailableException("Unspecified engine failure");
}
}
