<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
JBPM 4.3 - org.jbpm.api.JbpmException: couldn't acquire block of ids
</h3>
<span style="margin-bottom: 10px;">
reply from <a href="http://community.jboss.org/people/campa">Stefano Campanini</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/539800#539800">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>Hi guys, I'm back ... with new energies :-)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The problem was related to</p><pre jivemacro="wiki"><span style="font-family: courier new,courier;">org.jbpm.pvm.internal.id.DatabaseDbidGenerator</span> and precisely on <span style="font-family: courier new,courier;">AcquireDbidBlockCmd</span> it use.<br/><span style="font-family: arial,helvetica,sans-serif;">I have re-implmented these classes using sequence to generate ids, as below:<br/></span><span style="font-family: courier new,courier;">...<br/>public class SequenceDbIdGenerator extends DbidGenerator {    <br/>    CommandService commandService;<br/>    <br/>    @Override<br/>    public long getNextId() {<br/>        return commandService.execute(new SequenceDbIdGeneratorCmd());<br/>    }<br/>}<br/>...</span><br/>and <br/><span style="font-family: courier new,courier;">...<br/>public class SequenceDbIdGeneratorCmd implements Command<Long> {<br/>    private static final long serialVersionUID = -8109570788517494372L;<br/><br/>    @SuppressWarnings("unchecked")<br/>    @Override<br/>    public Long execute(Environment environment) throws Exception {<br/>        Session session = environment.get(Session.class);<br/>        List<BigInteger> res = session.createSQLQuery(<br/>                "select nextval('jbpm_seq_external_id')").list();<br/>        return res.get(0).longValue();<br/>    }<br/>}</span></pre><p>and i the jbpm config file:</p><p>...</p><p><span style="font-family: courier new,courier;"><object class="net.tinvention.wf.jbpm.SequenceDbIdGenerator"><br/> <field name="commandService"><ref object="txRequiredCommandService" /></field><br/></object><br/><object </span><span style="font-family: courier new,courier;">class="org.jbpm.pvm.internal.id.DatabaseIdComposer" init="eager" /></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Does anyone more expert on jbpm can validate ? Do you see any hidden disaster or this solution can work ? </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks in advance</p><p>Stefano </p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/539800#539800">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>