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Fixed getLock implementation to handle zero retry parameters

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@22933 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Derek Hulley
2010-10-07 02:09:36 +00:00
parent 54fd55d6b3
commit d4e98a7161
2 changed files with 31 additions and 6 deletions
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18
source/java/org/alfresco/repo/lock/JobLockServiceImpl.java
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@@ -409,6 +409,11 @@ public class JobLockServiceImpl implements JobLockService
*/
private void getLockImpl(final String lockToken, final QName lockQName, final long timeToLive, long retryWait, int retryCount)
{
if (retryCount < 0)
{
throw new IllegalArgumentException("Job lock retry count cannot be negative: " + retryCount);
}
RetryingTransactionCallback<Object> getLockCallback = new RetryingTransactionCallback<Object>()
{
public Object execute() throws Throwable
@@ -453,13 +458,14 @@ public class JobLockServiceImpl implements JobLockService
}
/**
* Does the high-level retrying around the callback
* Does the high-level retrying around the callback. At least one attempt is made to call the
* provided callback.
*/
private int doWithRetry(RetryingTransactionCallback<? extends Object> callback, long retryWait, int retryCount)
{
int iteration = 0;
int lockAttempt = 0;
LockAcquisitionException lastException = null;
while (iteration++ < retryCount)
while (lockAttempt++ <= retryCount) // lockAttempt incremented after check i.e. 1 for first iteration
{
try
{
@@ -472,10 +478,10 @@ public class JobLockServiceImpl implements JobLockService
{
if (logger.isDebugEnabled())
{
logger.debug("Lock attempt " + iteration + " of " + retryCount + " failed: " + e.getMessage());
logger.debug("Lock attempt " + lockAttempt + " of " + retryCount + " failed: " + e.getMessage());
}
lastException = e;
if (iteration >= retryCount)
if (lockAttempt >= retryCount)
{
// Avoid an unnecessary wait if this is the last attempt
break;
@@ -490,7 +496,7 @@ public class JobLockServiceImpl implements JobLockService
if (lastException == null)
{
// Success
return iteration;
return lockAttempt;
}
else
{