[jboss-user] [JBoss Seam] - synchronized keyword in SLSB

[toni]

Hi,

may we use the java keyword "synchronized" on a method of a SLSB to ensure that several statements get executed all together or not at all?

I have a method in a SLSB, which updates a counter kept in an Entity bean, if some condition is fulfilled.

Afterwards the counter is increased. I want to ensure the integrity of the counter. Because several threads can and will access the method.

What would you suggest?

This how the pseudo code block looks like:


  | 
  | public String methodDoesNotBelongToSLSinterface(EnityBeanWithCounter eb)
  | {
  | ...
  | ...
  | // make sure that no race condition can occur using 
  | synchronized(this)
  | {
  | statement1;
  | statement2;
  | ...
  | statementN;
  | // Increase counter if successful 
  | if (someCondition)
  |   eb.setCounter(eb.getCounter + 1);
  | }
  | ....
  | ....
  | }
  | 
  | 

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