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fixing race conditions 

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/accounting/accounting-lib@120308 82a268e6-3cf1-43bd-a215-b396298e98cf
This commit is contained in:
Luca Frosini 2015-11-18 16:42:15 +00:00
parent 7f5e0fc426
commit 459d95c8d5
1 changed files with 13 additions and 13 deletions
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26
src/main/java/org/gcube/accounting/persistence/AccountingPersistenceBackendFactory.java
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@ -115,23 +115,23 @@ public abstract class AccountingPersistenceBackendFactory {
Long now = Calendar.getInstance().getTimeInMillis();
Long lastCheckTimestamp = fallbackLastCheck.get(scope);
logger.debug("Last check for scope {} was {}", scope, lastCheckTimestamp);
if( (lastCheckTimestamp + FALLBACK_RETRY_TIME) <= now ){
logger.debug("The {} for scope {} is {}. Is time to rediscover if there is another possibility.",
boolean myTurn = false;
synchronized (accountingPersistenceBackends) {
if( (lastCheckTimestamp + FALLBACK_RETRY_TIME) <= now ){
logger.debug("The {} for scope {} is {}. Is time to rediscover if there is another possibility.",
AccountingPersistenceBackend.class.getSimpleName(), scope, actual.getClass().getSimpleName());
logger.trace("Renewing Last check Timestamp. The next one will be {}", now);
fallbackLastCheck.put(scope, now);
myTurn=true;
logger.debug("I win. It is my turn to rediscover {} in scope {}",
AccountingPersistenceBackend.class.getSimpleName(), scope);
}
}
if(myTurn){
AccountingPersistenceBackend discoveredPersistenceBackend = discoverAccountingPersistenceBackend(scope);
synchronized (accountingPersistenceBackends) {
logger.trace("Renewing Last check Timestamp. The next one will be {}", now);
Long reCheckTimestamp = fallbackLastCheck.get(scope);
if(lastCheckTimestamp.compareTo(reCheckTimestamp)!=0){
// Someone else arrived here before. Stopping to try to
logger.debug("Someone else arrived here before. Stopping to try to rediscover AccountingPersistenceBackend and getting the current");
return accountingPersistenceBackends.get(scope);
}
fallbackLastCheck.put(scope, now);
if(discoveredPersistenceBackend!=null){
/*
* Passing the aggregator to the new AccountingPersistenceBackend