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| <h2 title="Annotation Type Version" class="title">Annotation Type Version</h2> |
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| <pre>@Target(value={METHOD,FIELD}) |
| @Retention(value=RUNTIME) |
| public @interface <span class="memberNameLabel">Version</span></pre> |
| <div class="block">Specifies the version field or property of an entity class that |
| serves as its optimistic lock value. The version is used to ensure |
| integrity when performing the merge operation and for optimistic |
| concurrency control. |
| |
| <p> Only a single <code>Version</code> property or field |
| should be used per class; applications that use more than one |
| <code>Version</code> property or field will not be portable. |
| |
| <p> The <code>Version</code> property should be mapped to |
| the primary table for the entity class; applications that |
| map the <code>Version</code> property to a table other than |
| the primary table will not be portable. |
| |
| <p> The following types are supported for version properties: |
| <code>int</code>, <code>Integer</code>, <code>short</code>, |
| <code>Short</code>, <code>long</code>, <code>Long</code>, |
| <code>java.sql.Timestamp</code>. |
| |
| <pre> |
| Example: |
| |
| @Version |
| @Column(name="OPTLOCK") |
| protected int getVersionNum() { return versionNum; } |
| </pre></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.0</dd> |
| <dt><span class="simpleTagLabel">Examples (en):</span></dt> |
| <dd><a href="../../../../../tomee-9.0/examples/deltaspike-fullstack.html">deltaspike-fullstack</a></dd> |
| <dt><span class="simpleTagLabel">Examples (pt):</span></dt> |
| <dd><a href="../../../../../tomee-9.0/pt/examples/deltaspike-fullstack.html">deltaspike-fullstack</a></dd> |
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