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Your application class could be defined with a constructor taking the settings file and calculate if the session constraint was violated. The settings object could also be obtained in the <code>onCreateonCreate()</code> application callback by calling <code>getSessionSettingsgetSessionSettings()</code> on the supplied <code>Session</code> Session object.
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public class MyApplication extends MessageCracker {
private final SessionSettings settings;
private final static String MAX_ORDER_AMOUNT_KEY = "MaxOrderAmount";
public MyApplication(SessionSettings settings) {
this.settings = settings;
}
public void onMessage(NewOrderSingle order, SessionID sessionID) {
try {
if (orderAmount(order) > maxTradeAmount(sessionID)) {
sendBusinessReject("Trade amount too large.");
} else {
acceptOrder(order);
}
} catch (Throwable e) {
handleException(sessionID, e);
}
}
private double maxTradeAmount(SessionID sessionID) throws ConfigError, FieldConvertError {
// This could be cached for performance, if needed
return settings.getDouble(sessionID, MAX_ORDER_AMOUNT_KEY);
}
// ... other methods
}
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