I have a stateless session bean that contains one public method, several private methods, and some instance level variables. Below is a pseudo code example.
private int instanceLevelVar
public void methodA(int x) {
this.instanceLevelVar = x;
methodB();
}
private void methodB() {
System.out.println(instanceLevelVar);
}
What I'm seeing is that methodB is printing values that weren't passed into MethodA. As best I can tell it's printing values from other instances of the same bean. What would cause this?
I should point out the code works as expected 99.9% of the time. However, the .01% is causing some serious issues / concerns for me.
I understand that if I had different public methods then I might not get the same bean back between calls, which would result in this behavior. However, in this case the only call is to the single public method. Will the container (Glassfish in this case) still swap the beans out between private method calls?
(edit) I renamed "class level" to "instance level" as this was causing some confusion.
I would just not bother using instance variable in stateless session bean at all. Regardless of what the cause of the issue you have encountered, it's probably not something you would want to do anyway. Just try using local variables throughout or define instance variables in helper classes you are calling from the stateless session bean business methods.