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| <title>7. Transaction Events</title><base href="display"><link rel="stylesheet" type="text/css" href="css/docbook.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="manual.html" title="Apache OpenJPA 3.0 User's Guide"><link rel="up" href="ref_guide_runtime.html" title="Chapter 9. Runtime Extensions"><link rel="prev" href="ref_guide_sequence.html" title="6. Generators"><link rel="next" href="ref_guide_enterprise_abstractstore.html" title="8. Non-Relational Stores"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">7. |
| Transaction Events |
| </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ref_guide_sequence.html">Prev</a> </td><th width="60%" align="center">Chapter 9. |
| Runtime Extensions |
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| Transaction Events |
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| <p> |
| The OpenJPA runtime supports broadcasting transaction-related events. By |
| registering one or more |
| <a class="ulink" href="../../apidocs/org/apache/openjpa/event/TransactionListener.html" target="_top"> |
| <code class="classname">org.apache.openjpa.event.TransactionListener</code></a> s, |
| you can receive notifications when transactions begin, flush, rollback, commit, |
| and more. Where appropriate, event notifications include the set of |
| persistence-capable objects participating in the transaction. |
| </p> |
| <pre class="programlisting"> |
| public void addTransactionListener(Object listener); |
| public void removeTransactionListener(Object listener); |
| </pre> |
| <p> |
| These <code class="classname">OpenJPAEntityManagerSPI</code> methods allow you to add |
| and remove listeners. These methods are outside the bounds of the published OpenJPA APIs, and are subject to change in the future. |
| </p> |
| <p> |
| For details on the transaction framework, see the <code class="literal"> |
| org.apache.openjpa.event</code> package |
| <a class="ulink" href="../../apidocs/org/apache/openjpa/event/package-summary.html" target="_top">Javadoc</a>. |
| Also see <a class="xref" href="ref_guide_event.html" title="2. Remote Event Notification Framework">Section 2, “ |
| Remote Event Notification Framework |
| ”</a> for a description of OpenJPA's |
| remote event support. |
| </p> |
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| Generators |
| </td><td width="20%" align="center"><a accesskey="h" href="manual.html">Home</a></td><td width="40%" align="right" valign="top"> 8. |
| Non-Relational Stores |
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