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| <div class="subTitle">org.eclipse.persistence.descriptors</div> |
| <h2 title="Class PessimisticLockingPolicy" class="title">Class PessimisticLockingPolicy</h2> |
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| <li>org.eclipse.persistence.descriptors.PessimisticLockingPolicy</li> |
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| <pre>public class <span class="typeNameLabel">PessimisticLockingPolicy</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block"><p> <b>Description</b>: This policy is used to configure bean level pessimistic locking feature. |
| It is set on the CMPPolicy instance of the ClassDescriptor |
| |
| Note that bean is not pessimistic locked in the following scenarios: |
| <ul> |
| <li> No presence of a JTA transaction |
| <li> The current transaction is created and started by the Container for the invoking entity bean's method only. (i.e. invoke a business method without a client transaction) |
| <li> The bean has already been pessimistic locked in the current transaction |
| <li> Execution of ejbSelect |
| <li> Traversing relationship does not lock the returned result. |
| </ul> |
| <p> |
| <b>Responsibilities</b>: |
| <ul> |
| <li> Configure locking modes of WAIT or NO_WAIT |
| <li> Provide utility to configure an ObjectLevelReadQuery with pessimistic locking based on this policy. |
| </ul></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/descriptors/CMPPolicy.html" title="class in org.eclipse.persistence.descriptors"><code>CMPPolicy</code></a>, |
| <a href="../../../../serialized-form.html#org.eclipse.persistence.descriptors.PessimisticLockingPolicy">Serialized Form</a></dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>TopLink 10.1.3</dd> |
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| <td class="colFirst"><code>protected short</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/PessimisticLockingPolicy.html#lockingMode">lockingMode</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/PessimisticLockingPolicy.html#PessimisticLockingPolicy--">PessimisticLockingPolicy</a></span>()</code> </td> |
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| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/PessimisticLockingPolicy.html#clone--">clone</a></span>()</code> |
| <div class="block">INTERNAL: |
| Clone the policy</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>short</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/PessimisticLockingPolicy.html#getLockingMode--">getLockingMode</a></span>()</code> |
| <div class="block">PUBLIC: |
| Return locking mode.</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/persistence/descriptors/PessimisticLockingPolicy.html#setLockingMode-short-">setLockingMode</a></span>(short mode)</code> |
| <div class="block">PUBLIC: |
| Set locking mode.</div> |
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| <a name="lockingMode"> |
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| <h4>lockingMode</h4> |
| <pre>protected short lockingMode</pre> |
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| <h4>PessimisticLockingPolicy</h4> |
| <pre>public PessimisticLockingPolicy()</pre> |
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| <h4>getLockingMode</h4> |
| <pre>public short getLockingMode()</pre> |
| <div class="block">PUBLIC: |
| Return locking mode. Default locking mode is ObjectLevelReadQuery.LOCK.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>short locking mode value of ObjectLevelReadQuery.LOCK or ObjectLevelReadQuery.LOCK_NOWAIT</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>setLockingMode</h4> |
| <pre>public void setLockingMode(short mode)</pre> |
| <div class="block">PUBLIC: |
| Set locking mode. If the mode is not a valid value, the locking mode is unchanged.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>mode</code> - must be value of ObjectLevelReadQuery.LOCK or ObjectLevelReadQuery.LOCK_NOWAIT</dd> |
| </dl> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> clone()</pre> |
| <div class="block">INTERNAL: |
| Clone the policy</div> |
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| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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