<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Isn't this akin to SERIALIZABLE?<div><br><div><div>On 22 Jun 2012, at 15:47, Mircea Markus wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi guys,<br><br>I've come around a JIRA[1] about optimistic locking and write skew check, and wondering what's the expected behavior in the following scenario:<br>tx1.begin()<br>read(a); <br> // tx2 modifies 'a' and commits changes<br>write(b);<br>tx1.commit() - shall I get a write skew (version changed) exception here as a was modified between read and commit?<br><br>In other words, shall I also perform write skew check for the entries that were read during a tx? We currently don't, but I can totally see situations in which this would be needed: if the decision to write to 'b' is made on the value of 'a' and there's an invariant containing both a and b.<br><br><br>[1]<a href="https://issues.jboss.org/browse/ISPN-1841">https://issues.jboss.org/browse/ISPN-1841</a><br><br>Cheers<br>Mircea<br>--<br>Mircea Markus<br><a href="http://twitter.com/mirceamarkus">twitter.com/mirceamarkus</a><br><br>Sr. Software Engineer, Infinispan<br>http://www.infinispan.org<br>_______________________________________________<br>infinispan-dev mailing list<br>infinispan-dev@lists.jboss.org<br>https://lists.jboss.org/mailman/listinfo/infinispan-dev<br></div></blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div>--</div><div>Manik Surtani</div><div><a href="mailto:manik@jboss.org">manik@jboss.org</a></div><div><a href="http://twitter.com/maniksurtani">twitter.com/maniksurtani</a></div><div><br></div><div>Project Lead, Infinispan</div><div><a href="http://www.infinispan.org">http://www.infinispan.org</a></div><div><br></div><div>Platform Architect, JBoss Data Grid</div><div><a href="http://www.redhat.com/promo/dg6beta">http://www.redhat.com/promo/dg6beta</a></div></div></div></div></span></span>
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