inteligr8/alfresco-community-repo
1
0
Fork 0
mirror of https://github.com/Alfresco/alfresco-community-repo.git synced 2025-07-24 17:32:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merged V2.1 to HEAD

Browse Source 
6944: More hibernate session cache taming.
   6945: Times for commits are close to linear in the number of items submitted.
   6946: Missing break statement. (Courtesy of Jan).
   6948: Fixed session cache eviction problem triggered by resetLayer().
   6956: Wrapped AVMService and AttributeService in TransactionResourceInterceptor.
   Reverted log4j.properties


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@7368 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Derek Hulley
2007-11-12 23:18:09 +00:00
parent e3d5cececb
commit 209dd85a0d
23 changed files with 416 additions and 306 deletions
Download Patch File Download Diff File Expand all files Collapse all files

88
source/java/org/alfresco/repo/transaction/RetryingTransactionHelper.java
View File

@@ -15,11 +15,11 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* http://www.alfresco.com/legal/licensing"
*/
package org.alfresco.repo.transaction;
@@ -39,6 +39,7 @@ import org.alfresco.service.transaction.TransactionService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.StaleObjectStateException;
import org.hibernate.StaleStateException;
import org.hibernate.exception.LockAcquisitionException;
import org.springframework.dao.ConcurrencyFailureException;
import org.springframework.dao.DataIntegrityViolationException;
@@ -46,17 +47,17 @@ import org.springframework.dao.DeadlockLoserDataAccessException;
import org.springframework.jdbc.UncategorizedSQLException;
/**
* A helper that runs a unit of work inside a UserTransaction,
* transparently retrying the unit of work if the cause of
* A helper that runs a unit of work inside a UserTransaction,
* transparently retrying the unit of work if the cause of
* failure is an optimistic locking or deadlock condition.
*
*
* @author britt
*/
public class RetryingTransactionHelper
{
private static final String MSG_READ_ONLY = "permissions.err_read_only";
private static Log logger = LogFactory.getLog(RetryingTransactionHelper.class);
/**
* Exceptions that trigger retries.
*/
@@ -69,30 +70,31 @@ public class RetryingTransactionHelper
StaleObjectStateException.class,
LockAcquisitionException.class,
BatchUpdateException.class,
DataIntegrityViolationException.class
DataIntegrityViolationException.class,
StaleStateException.class
};
}
/**
* Reference to the TransactionService instance.
*/
private TransactionService txnService;
/**
* The maximum number of retries. -1 for infinity.
*/
private int maxRetries;
/**
* Whether the the transactions may only be reads
*/
private boolean readOnly;
/**
* Random number generator for retry delays.
*/
private Random random;
/**
* Callback interface
* @author britt
@@ -101,7 +103,7 @@ public class RetryingTransactionHelper
{
/**
* Perform a unit of transactional work.
*
*
* @return Return the result of the unit of work
* @throws Throwable This can be anything and will guarantee either a retry or a rollback
*/
@@ -115,7 +117,7 @@ public class RetryingTransactionHelper
{
this.random = new Random(System.currentTimeMillis());
}
// Setters.
/**
* Set the TransactionService.
@@ -124,7 +126,7 @@ public class RetryingTransactionHelper
{
this.txnService = service;
}
/**
* Set the maximimum number of retries. -1 for infinity.
*/
@@ -132,7 +134,7 @@ public class RetryingTransactionHelper
{
this.maxRetries = maxRetries;
}
/**
* Set whether this helper only supports read transactions.
*/
@@ -142,15 +144,15 @@ public class RetryingTransactionHelper
}
/**
* Execute a callback in a transaction until it succeeds, fails
* Execute a callback in a transaction until it succeeds, fails
* because of an error not the result of an optimistic locking failure,
* or a deadlock loser failure, or until a maximum number of retries have
* been attempted.
* been attempted.
* <p>
* If there is already an active transaction, then the callback is merely
* executed and any retry logic is left to the caller. The transaction
* will attempt to be read-write.
*
*
* @param cb The callback containing the unit of work.
* @return Returns the result of the unit of work.
* @throws RuntimeException all checked exceptions are converted
@@ -159,16 +161,16 @@ public class RetryingTransactionHelper
{
return doInTransaction(cb, false, false);
}
/**
* Execute a callback in a transaction until it succeeds, fails
* Execute a callback in a transaction until it succeeds, fails
* because of an error not the result of an optimistic locking failure,
* or a deadlock loser failure, or until a maximum number of retries have
* been attempted.
* been attempted.
* <p>
* If there is already an active transaction, then the callback is merely
* executed and any retry logic is left to the caller.
*
*
* @param cb The callback containing the unit of work.
* @param readOnly Whether this is a read only transaction.
* @return Returns the result of the unit of work.
@@ -178,16 +180,16 @@ public class RetryingTransactionHelper
{
return doInTransaction(cb, readOnly, false);
}
/**
* Execute a callback in a transaction until it succeeds, fails
* Execute a callback in a transaction until it succeeds, fails
* because of an error not the result of an optimistic locking failure,
* or a deadlock loser failure, or until a maximum number of retries have
* been attempted.
* been attempted.
* <p>
* It is possible to force a new transaction to be created or to partake in
* any existing transaction.
*
*
* @param cb The callback containing the unit of work.
* @param readOnly Whether this is a read only transaction.
* @param requiresNew <tt>true</tt> to force a new transaction or
@@ -274,7 +276,7 @@ public class RetryingTransactionHelper
// Rollback if we can.
if (txn != null)
{
try
try
{
int txnStatus = txn.getStatus();
// We can only rollback if a transaction was started (NOT NO_TRANSACTION) and
@@ -285,18 +287,18 @@ public class RetryingTransactionHelper
{
txn.rollback();
}
}
catch (IllegalStateException e1)
{
logger.error(e);
throw new AlfrescoRuntimeException("Failure during rollback: " + cb, e1);
}
catch (SecurityException e1)
}
catch (IllegalStateException e1)
{
logger.error(e);
throw new AlfrescoRuntimeException("Failure during rollback: " + cb, e1);
}
catch (SystemException e1)
catch (SecurityException e1)
{
logger.error(e);
throw new AlfrescoRuntimeException("Failure during rollback: " + cb, e1);
}
catch (SystemException e1)
{
logger.error(e);
throw new AlfrescoRuntimeException("Failure during rollback: " + cb, e1);
@@ -309,7 +311,7 @@ public class RetryingTransactionHelper
}
else
{
lastException = (e instanceof RuntimeException) ?
lastException = (e instanceof RuntimeException) ?
(RuntimeException)e : new AlfrescoRuntimeException("Exception in Transaction.", e);
}
// Check if there is a cause for retrying
@@ -324,7 +326,7 @@ public class RetryingTransactionHelper
}
catch (InterruptedException ie)
{
// Do nothing.
// Do nothing.
}
// Try again
continue;
@@ -340,10 +342,10 @@ public class RetryingTransactionHelper
// So, fail.
throw lastException;
}
/**
* Sometimes, the exception means retry and sometimes not.
*
*
* @param cause the cause to examine
* @return Returns the original cause if it is a valid retry cause, otherwise <tt>null</tt>
*/