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<div class="subTitle">org.eclipse.emf.cdo.transaction</div>
<h2 title="Interface CDOTransactionHandler1" class="title">Interface CDOTransactionHandler1</h2>
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<dt>All Superinterfaces:</dt>
<dd><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandlerBase.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransactionHandlerBase</a></dd>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandler.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransactionHandler</a></dd>
</dl>
<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAsyncTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction">CDOAsyncTransactionHandler</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAutoAttacher.html" title="class in org.eclipse.emf.cdo.transaction">CDOAutoAttacher</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAutoLocker.html" title="class in org.eclipse.emf.cdo.transaction">CDOAutoLocker</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAutoLocker.ForSingleValuedChanges.html" title="class in org.eclipse.emf.cdo.transaction">CDOAutoLocker.ForSingleValuedChanges</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDODefaultTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction">CDODefaultTransactionHandler</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDODefaultTransactionHandler1.html" title="class in org.eclipse.emf.cdo.transaction">CDODefaultTransactionHandler1</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOPostEventTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction">CDOPostEventTransactionHandler</a>, <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOPostEventTransactionHandler.Default.html" title="class in org.eclipse.emf.cdo.transaction">CDOPostEventTransactionHandler.Default</a></dd>
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<pre>public interface <span class="typeNameLabel">CDOTransactionHandler1</span>
extends <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandlerBase.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransactionHandlerBase</a></pre>
<div class="block">A call-back interface that is called by a <a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction"><code>transaction</code></a> before <a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo"><code>objects</code></a> are
attached, modified or detached.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>4.0</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOPostEventTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction"><code>CDOPostEventTransactionHandler</code></a></dd>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandler1.html#attachingObject-org.eclipse.emf.cdo.transaction.CDOTransaction-org.eclipse.emf.cdo.CDOObject-">attachingObject</a></span>(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object)</code>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is added.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandler1.html#detachingObject-org.eclipse.emf.cdo.transaction.CDOTransaction-org.eclipse.emf.cdo.CDOObject-">detachingObject</a></span>(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object)</code>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is detached.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransactionHandler1.html#modifyingObject-org.eclipse.emf.cdo.transaction.CDOTransaction-org.eclipse.emf.cdo.CDOObject-org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta-">modifyingObject</a></span>(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object,
<a href="../../../../../org/eclipse/emf/cdo/common/revision/delta/CDOFeatureDelta.html" title="interface in org.eclipse.emf.cdo.common.revision.delta">CDOFeatureDelta</a>&nbsp;featureDelta)</code>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is modified.</div>
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<h4>attachingObject</h4>
<pre>void&nbsp;attachingObject(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object)</pre>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is added. The implementor of this method is allowed
to throw an unchecked exception that will propagate up to the operation that is about to add the object (thereby
preventing the operation from successful completion).
<p>
<b>Note:</b> Implementors <b>must not</b> start threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> and wait for their
completion since deadlocks can result. The following example causes a deadlock:<br>
<pre>
getDisplay().syncExec(new Runnable()
{
public void run()
{
try
{
cdoObject.getName();
}
catch (Exception ignore)
{
}
}
});
</pre>
If you need to synchronously execute threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> you should use
<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAsyncTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction"><code>CDOAsyncTransactionHandler</code></a>.</div>
</li>
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<h4>detachingObject</h4>
<pre>void&nbsp;detachingObject(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object)</pre>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is detached. The implementor of this method is
allowed to throw an unchecked exception that will propagate up to the operation that is about to remove the object
(thereby preventing the operation from completing successfully).
<p>
<b>Note:</b> Implementors <b>must not</b> start threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> and wait for their
completion since deadlocks can result. The following example causes a deadlock:<br>
<pre>
getDisplay().syncExec(new Runnable()
{
public void run()
{
try
{
cdoObject.getName();
}
catch (Exception ignore)
{
}
}
});
</pre>
If you need to synchronously execute threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> you should use
<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAsyncTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction"><code>CDOAsyncTransactionHandler</code></a>.</div>
</li>
</ul>
<a name="modifyingObject-org.eclipse.emf.cdo.transaction.CDOTransaction-org.eclipse.emf.cdo.CDOObject-org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta-">
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<h4>modifyingObject</h4>
<pre>void&nbsp;modifyingObject(<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOTransaction.html" title="interface in org.eclipse.emf.cdo.transaction">CDOTransaction</a>&nbsp;transaction,
<a href="../../../../../org/eclipse/emf/cdo/CDOObject.html" title="interface in org.eclipse.emf.cdo">CDOObject</a>&nbsp;object,
<a href="../../../../../org/eclipse/emf/cdo/common/revision/delta/CDOFeatureDelta.html" title="interface in org.eclipse.emf.cdo.common.revision.delta">CDOFeatureDelta</a>&nbsp;featureDelta)</pre>
<div class="block">Called by a <code>CDOTransaction</code> <b>before</b> an object is modified. The implementor of this method is
allowed to throw an unchecked exception that will propagate up to the operation that is about to modify the object
(thereby preventing the operation from completing successfully).
<p>
<b>Note:</b> Implementors <b>must not</b> start threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> and wait for their
completion since deadlocks can result. The following example causes a deadlock:<br>
<pre>
getDisplay().syncExec(new Runnable()
{
public void run()
{
try
{
cdoObject.getName();
}
catch (Exception ignore)
{
}
}
});
</pre>
If you need to synchronously execute threads which access the <a href="../../../../../org/eclipse/emf/cdo/view/CDOView.html" title="interface in org.eclipse.emf.cdo.view"><code>view</code></a> you should use
<a href="../../../../../org/eclipse/emf/cdo/transaction/CDOAsyncTransactionHandler.html" title="class in org.eclipse.emf.cdo.transaction"><code>CDOAsyncTransactionHandler</code></a>.</div>
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