| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <title>Fallback</title> |
| <link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../../../script.js"></script> |
| |
| <link rel="shortcut icon" href="/img/microprofile-favicon.png"> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="Fallback"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../org/eclipse/microprofile/faulttolerance/ExecutionContext.html" title="interface in org.eclipse.microprofile.faulttolerance"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.DEFAULT.html" title="class in org.eclipse.microprofile.faulttolerance"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../index.html?org/eclipse/microprofile/faulttolerance/Fallback.html" target="_top">Frames</a></li> |
| <li><a href="Fallback.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Field | </li> |
| <li>Required | </li> |
| <li><a href="#annotation.type.optional.element.summary">Optional</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.element.detail">Element</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="subTitle">org.eclipse.microprofile.faulttolerance</div> |
| <h2 title="Annotation Type Fallback" class="title">Annotation Type Fallback</h2> |
| </div> |
| <div class="contentContainer"> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <hr> |
| <br> |
| <pre>@Documented |
| @Retention(value=RUNTIME) |
| @Target(value=METHOD) |
| @Inherited |
| public @interface <span class="memberNameLabel">Fallback</span></pre> |
| <div class="block">The fallback annotation to define the fallback handler class so that |
| a failure can be handled properly. The criteria are as follows: |
| <ol> |
| <li>If value is specified, use <a href="../../../../org/eclipse/microprofile/faulttolerance/FallbackHandler.html#handle-org.eclipse.microprofile.faulttolerance.ExecutionContext-"><code>FallbackHandler.handle(ExecutionContext)</code></a> on the specified handler to execute the fallback.</li> |
| <li>If fallbackMethod is specified, invoke the method specified by the fallbackMethod on the same class.</li> |
| <li>If both are specified, the <a href="../../../../org/eclipse/microprofile/faulttolerance/exceptions/FaultToleranceDefinitionException.html" title="class in org.eclipse.microprofile.faulttolerance.exceptions"><code>FaultToleranceDefinitionException</code></a> must be thrown.</li> |
| </ol> |
| <p> |
| When a method returns and the fallback policy is present, the following rules are applied: |
| <ol> |
| <li>If the method returns normally (doesn't throw), the result is simply returned. |
| <li>Otherwise, if the thrown object is assignable to any value in the <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#skipOn--"><code>skipOn()</code></a> parameter, the thrown object will be rethrown. |
| <li>Otherwise, if the thrown object is assignable to any value in the <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#applyOn--"><code>applyOn()</code></a> parameter, |
| the fallback policy, detailed above, will be applied. |
| <li>Otherwise the thrown object will be rethrown. |
| </ol> |
| If a method throws a <code>Throwable</code> which is not an <code>Error</code> or <code>Exception</code>, non-portable behavior results.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#value--"><code>value()</code></a>, |
| <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#fallbackMethod--"><code>fallbackMethod()</code></a>, |
| <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#applyOn--"><code>applyOn()</code></a>, |
| <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#skipOn--"><code>skipOn()</code></a></dd> |
| <dt><span class="simpleTagLabel">Examples (en):</span></dt> |
| <dd><a href="../../../../../../../tomee-9.0/examples/mp-faulttolerance-timeout.html">mp-faulttolerance-timeout</a>, <a href="../../../../../../../tomee-9.0/examples/mp-faulttolerance-fallback.html">mp-faulttolerance-fallback</a></dd> |
| <dt><span class="simpleTagLabel">Examples (es):</span></dt> |
| <dd><a href="../../../../../../../tomee-9.0/es/examples/mp-faulttolerance-timeout.html">mp-faulttolerance-timeout</a>, <a href="../../../../../../../tomee-9.0/es/examples/mp-faulttolerance-fallback.html">mp-faulttolerance-fallback</a></dd> |
| <dt><span class="simpleTagLabel">Examples (pt):</span></dt> |
| <dd><a href="../../../../../../../tomee-9.0/pt/examples/mp-faulttolerance-timeout.html">mp-faulttolerance-timeout</a>, <a href="../../../../../../../tomee-9.0/pt/examples/mp-faulttolerance-fallback.html">mp-faulttolerance-fallback</a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="annotation.type.optional.element.summary"> |
| <!-- --> |
| </a> |
| <h3>Optional Element Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation"> |
| <caption><span>Optional Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Optional Element and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.Class<? extends java.lang.Throwable>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#applyOn--">applyOn</a></span></code> |
| <div class="block">The list of exception types which should trigger Fallback</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#fallbackMethod--">fallbackMethod</a></span></code> |
| <div class="block">Specify the method name to fallback to.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.Class<? extends java.lang.Throwable>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#skipOn--">skipOn</a></span></code> |
| <div class="block">The list of exception types which should <i>not</i> trigger Fallback</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>java.lang.Class<? extends <a href="../../../../org/eclipse/microprofile/faulttolerance/FallbackHandler.html" title="interface in org.eclipse.microprofile.faulttolerance">FallbackHandler</a><?>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#value--">value</a></span></code> |
| <div class="block">Specify the fallback class to be used.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ ANNOTATION TYPE MEMBER DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="annotation.type.element.detail"> |
| <!-- --> |
| </a> |
| <h3>Element Detail</h3> |
| <a name="value--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>value</h4> |
| <pre>public abstract java.lang.Class<? extends <a href="../../../../org/eclipse/microprofile/faulttolerance/FallbackHandler.html" title="interface in org.eclipse.microprofile.faulttolerance">FallbackHandler</a><?>> value</pre> |
| <div class="block">Specify the fallback class to be used. A new instance of the fallback class |
| is returned. The instance is unmanaged. The type parameter of the fallback class must be assignable to the |
| return type of the annotated method. |
| Otherwise, <a href="../../../../org/eclipse/microprofile/faulttolerance/exceptions/FaultToleranceDefinitionException.html" title="class in org.eclipse.microprofile.faulttolerance.exceptions"><code>FaultToleranceDefinitionException</code></a> occurs.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the fallback class</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>org.eclipse.microprofile.faulttolerance.Fallback.DEFAULT.class</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fallbackMethod--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>fallbackMethod</h4> |
| <pre>public abstract java.lang.String fallbackMethod</pre> |
| <div class="block">Specify the method name to fallback to. This method belongs |
| to the same class as the method to fallback. |
| The method must have the exact same arguments as the method being annotated. |
| The method return type must be assignable to the return type of the method the fallback is for. |
| Otherwise, <a href="../../../../org/eclipse/microprofile/faulttolerance/exceptions/FaultToleranceDefinitionException.html" title="class in org.eclipse.microprofile.faulttolerance.exceptions"><code>FaultToleranceDefinitionException</code></a> must be thrown.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the local method to fallback to</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="applyOn--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>applyOn</h4> |
| <pre>public abstract java.lang.Class<? extends java.lang.Throwable>[] applyOn</pre> |
| <div class="block">The list of exception types which should trigger Fallback |
| <p> |
| Note that if a method throws a <code>Throwable</code> which is not an <code>Error</code> or <code>Exception</code>, |
| non-portable behavior results.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the exception types which should trigger Fallback</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>java.lang.Throwable.class</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="skipOn--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>skipOn</h4> |
| <pre>public abstract java.lang.Class<? extends java.lang.Throwable>[] skipOn</pre> |
| <div class="block">The list of exception types which should <i>not</i> trigger Fallback |
| <p> |
| This list takes priority over the types listed in <a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.html#applyOn--"><code>applyOn()</code></a> |
| <p> |
| Note that if a method throws a <code>Throwable</code> which is not an <code>Error</code> or <code>Exception</code>, |
| non-portable behavior results.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the exception types which should not trigger Fallback</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>{}</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../org/eclipse/microprofile/faulttolerance/ExecutionContext.html" title="interface in org.eclipse.microprofile.faulttolerance"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../org/eclipse/microprofile/faulttolerance/Fallback.DEFAULT.html" title="class in org.eclipse.microprofile.faulttolerance"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../index.html?org/eclipse/microprofile/faulttolerance/Fallback.html" target="_top">Frames</a></li> |
| <li><a href="Fallback.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Field | </li> |
| <li>Required | </li> |
| <li><a href="#annotation.type.optional.element.summary">Optional</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#annotation.type.element.detail">Element</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| </body> |
| </html> |
