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| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation" class="externalLink">@Target</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#PARAMETER" title="class or interface in java.lang.annotation" class="externalLink">PARAMETER</a>) |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Retention.html?is-external=true" title="class or interface in java.lang.annotation" class="externalLink">@Retention</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/RetentionPolicy.html?is-external=true#RUNTIME" title="class or interface in java.lang.annotation" class="externalLink">RUNTIME</a>) |
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| public @interface <span class="memberNameLabel">Suspended</span></pre> |
| <div class="block">Inject a suspended <a href="AsyncResponse.html" title="interface in jakarta.ws.rs.container"><code>AsyncResponse</code></a> into a parameter of an invoked JAX-RS <a href="../HttpMethod.html" title="annotation in jakarta.ws.rs"><code>resource |
| or sub-resource method</code></a>. |
| |
| The injected <code>AsyncResponse</code> instance is bound to the processing of the active request and can be used to |
| resume the request processing when a response is available. |
| <p> |
| By default there is <a href="AsyncResponse.html#NO_TIMEOUT"><code>no suspend timeout set</code></a> and the asynchronous response is |
| suspended indefinitely. The suspend timeout as well as a custom <a href="TimeoutHandler.html" title="interface in jakarta.ws.rs.container"><code>timeout handler</code></a> can be |
| specified programmatically using the <a href="AsyncResponse.html#setTimeout(long,java.util.concurrent.TimeUnit)"><code>AsyncResponse.setTimeout(long, TimeUnit)</code></a> and |
| <a href="AsyncResponse.html#setTimeoutHandler(jakarta.ws.rs.container.TimeoutHandler)"><code>AsyncResponse.setTimeoutHandler(TimeoutHandler)</code></a> methods. For example: |
| </p> |
| |
| <pre> |
| @Stateless |
| @Path("/") |
| public class MyEjbResource { |
| … |
| @GET |
| @Asynchronous |
| public void longRunningOperation(@Suspended AsyncResponse ar) { |
| ar.setTimeoutHandler(customHandler); |
| ar.setTimeout(10, TimeUnit.SECONDS); |
| final String result = executeLongRunningOperation(); |
| ar.resume(result); |
| } |
| |
| private String executeLongRunningOperation() { … } |
| } |
| </pre> |
| <p> |
| A resource or sub-resource method that injects a suspended instance of an <code>AsyncResponse</code> using the |
| <code>@Suspended</code> annotation is expected be declared to return <code>void</code> type. Methods that inject asynchronous |
| response instance using the <code>@Suspended</code> annotation and declare a return type other than <code>void</code> MUST be |
| detected by the JAX-RS runtime and a warning message MUST be logged. Any response value returned from such resource |
| or sub-resource method MUST be ignored by the framework: |
| </p> |
| |
| <pre> |
| @Path("/messages/next") |
| public class MessagingResource { |
| … |
| @GET |
| public String readMessage(@Suspended AsyncResponse ar) { |
| suspended.put(ar); |
| return "This response will be ignored."; |
| } |
| … |
| } |
| </pre></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.0</dd> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Marek Potociar</dd> |
| </dl> |
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