[hornetq-commits] JBoss hornetq SVN: r9830 - branches/Branch_New_Paging/src/main/org/hornetq/core/paging/cursor/impl.

Author: clebert.suconic(a)jboss.com Date: 2010-11-01 20:38:52 -0400 (Mon, 01 Nov 2010) New Revision: 9830 Modified: branches/Branch_New_Paging/src/main/org/hornetq/core/paging/cursor/impl/PageSubscriptionImpl.java Log: tweak Modified: branches/Branch_New_Paging/src/main/org/hornetq/core/paging/cursor/impl/PageSubscriptionImpl.java =================================================================== --- branches/Branch_New_Paging/src/main/org/hornetq/core/paging/cursor/impl/PageSubscriptionImpl.java 2010-11-02 00:24:34 UTC (rev 9829) +++ branches/Branch_New_Paging/src/main/org/hornetq/core/paging/cursor/impl/PageSubscriptionImpl.java 2010-11-02 00:38:52 UTC (rev 9830) @@ -160,6 +160,10 @@ LinkedListIterator<PagePosition> redeliveryIterator = redeliveries.iterator(); boolean isredelivery = false; + + /** next element taken on hasNext test. + * it has to be delivered on next next operation */ + Pair<PagePosition, PagedMessage> cachedNext; public void repeat() { @@ -185,6 +189,13 @@ */ public Pair<PagePosition, PagedMessage> next() { + + if (cachedNext != null) + { + Pair<PagePosition, PagedMessage> retPos = cachedNext; + cachedNext = null; + return retPos; + } try { if (redeliveryIterator.hasNext()) @@ -212,7 +223,15 @@ public boolean hasNext() { - return true; + // if an unbehaved program called hasNext twice before next, we only cache it once. + if (cachedNext != null) + { + return true; + } + + cachedNext = next(); + + return cachedNext != null; } /* (non-Javadoc)