Hi manik,
Iam newbie to jboss cache, Please clarify me regarding my understanding.
I am using the POJO cache in clustered environment as follows.
public class POJO{
private int count;
private setCount(int count){
this.count = count;
}
private int getCount(){
return count;
}
}
A POJO object will be created and attached to the cache through a servlet in
instance1 as follows
POJO obj = new POJO();
cache = PojoCacheFactory.createCache("replSync-service.xml", true);
cache.attach("monitor", obj); // I hope "/monitor" will be the FQN under which
obj will be stored
Now 2 transactions t1,t2 will be trying to increment the value of count from
instance2,instance3 respectively as follows
cache = PojoCacheFactory.createCache("replSync-service.xml", true);
POJO obj = (POJO) cache.find("monitor");
tx.begin();
int currentValue = obj.getCount();
currentValue++;
obj.setCount(currentValue);
tx.commit();
Now how can i guarantee that the count value is not over written by t2 which
was written by t3
Can i acquire explicit lock on "/monitor" before starting a transaction so that
no other transaction in other instance should be able to read/write on
"/monitor" ?
Iam expecting that if isolation level "SERIALIZABLE" is used i don't need to
bother about the above problem and repeat the statements in between
begin,commit untill it succeeds. Am i right ?
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