CompositeStartupMessageLogger startupMessageLogger = new CompositeStartupMessageLogger(messageLoggers);
EventLogger startupLogger = new EventLogger(startupMessageLogger);
logStartupMessages(startupLogger);
BrokerStoreUpgraderAndRecoverer upgrader = new BrokerStoreUpgraderAndRecoverer(_systemConfig);
Broker broker = upgrader.perform(_store);
_broker = broker;
broker.setEventLogger(startupLogger);
broker.open();