Examples of javax.ws.rs.container.TimeoutHandler

javax.ws.rs.container.TimeoutHandler
Asynchronous response suspend time-out handler. JAX-RS users may utilize this callback interface to provide custom resolution of time-out events.
By default, JAX-RS runtime generates a {@link javax.ws.rs.WebApplicationException}with a {@link javax.ws.rs.core.Response.Status#SERVICE_UNAVAILABLE HTTP 503(Service unavailable)} error response status code. A custom time-out handlermay be {@link AsyncResponse#setTimeoutHandler(TimeoutHandler) set} on anasynchronous response instance to provide custom time-out event resolution.

In case of a suspend time-out event, a custom time-out handler takes typically one of the following actions:
- Resumes the suspended asynchronous response using a {@link AsyncResponse#resume(Object) custom response} or a {@link AsyncResponse#resume(Throwable) custom exception}
- Cancels the response by calling one of the {@link AsyncResponse} {@code cancel(...)}methods.
- Extends the suspend period of the response by {@link AsyncResponse#setTimeout(long,java.util.concurrent.TimeUnit) setting a new suspend time-out}
If the registered time-out handler does not take any of the actions above, the default time-out event processing continues and the response is resumed with a generated {@code WebApplicationException} containing the HTTP 503 status code.

Following example illustrates the use of a custom {@code TimeoutHandler}:
```
 public class MyTimeoutHandler implements TimeoutHandler { … public void handleTimeout(AsyncResponse ar) { if (keepSuspended) { ar.setTimeout(10, SECONDS); } else if (cancel) { ar.cancel(retryPeriod); } else { ar.resume(defaultResponse); } } … } @Path("/messages/next") public class MessagingResource { … @GET public void readMessage(@Suspended AsyncResponse ar) { ar.setTimeoutHandler(new MyTimeoutHandler()); suspended.put(ar); } … } 
```
@author Marek Potociar @since 2.0

            responder.completionCallbackRunner.register(this);
        }


        @Override
        public void onTimeout(final ContainerResponseWriter responseWriter) {
            final TimeoutHandler handler = timeoutHandler;
            try {
                synchronized (stateLock) {
                    if (state == SUSPENDED) {
                        handler.handleTimeout(this);
                    }
                }
            } catch (final Throwable throwable) {
                resume(throwable);
            }

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        }


        @GET
        @Path("timeout")
        public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
            asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                @Override
                public void handleTimeout(final AsyncResponse asyncResponse) {
                    asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE).entity("Operation time out.")
                            .build());

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         */
        @GET
        @Path("timeout")
        public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
            LOGGER.info("Async long-running get with timeout called on thread " + Thread.currentThread().getName());
            asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                @Override
                public void handleTimeout(AsyncResponse asyncResponse) {
                    asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE)
                            .entity("Operation time out.").build());

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         */
        @GET
        @Path("timeout")
        public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
            LOGGER.info("Async long-running get with timeout called on thread " + Thread.currentThread().getName());
            asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                @Override
                public void handleTimeout(AsyncResponse asyncResponse) {
                    asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE)
                            .entity("Operation time out.").build());

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    @Path("timeout")
    public void setTimeOut(final Integer millis) throws InterruptedException {
        final AsyncResponse asyncResponse = queue.take();


        final boolean timeout1 = asyncResponse.setTimeout(millis, TimeUnit.MILLISECONDS);
        asyncResponse.setTimeoutHandler(new TimeoutHandler() {


            @Override
            public void handleTimeout(final AsyncResponse asyncResponse) {
                final boolean timeout2 = asyncResponse.setTimeout(millis, TimeUnit.MILLISECONDS);
                asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                    @Override
                    public void handleTimeout(final AsyncResponse asyncResponse) {
                        asyncResponse.resume("timeout1=" + timeout1 + "_timeout2=" + timeout2 + "_handled");
                    }

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    @POST
    @Path("timeout")
    public void setTimeout(final String stage) throws Exception {
        final AsyncResponse async = stages[Integer.parseInt(stage)].take();


        async.setTimeoutHandler(new TimeoutHandler() {
            @Override
            public void handleTimeout(final AsyncResponse response) {
                response.cancel();
            }
        });

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    @Path("timeout")
    public void setTimeOut(final Integer millis) throws InterruptedException {
        final AsyncResponse asyncResponse = queue.take();


        final boolean timeout1 = asyncResponse.setTimeout(millis, TimeUnit.MILLISECONDS);
        asyncResponse.setTimeoutHandler(new TimeoutHandler() {


            @Override
            public void handleTimeout(final AsyncResponse asyncResponse) {
                final boolean timeout2 = asyncResponse.setTimeout(millis, TimeUnit.MILLISECONDS);
                asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                    @Override
                    public void handleTimeout(final AsyncResponse asyncResponse) {
                        asyncResponse.resume("timeout1=" + timeout1 + "_timeout2=" + timeout2 + "_handled");
                        asyncResponse.cancel();

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         */
        @GET
        @Path("timeout")
        public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
            LOGGER.info("Async long-running get with timeout called on thread " + Thread.currentThread().getName());
            asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                @Override
                public void handleTimeout(AsyncResponse asyncResponse) {
                    asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE)
                            .entity("Operation time out.").build());

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         */
        @GET
        @Path("timeout")
        public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
            LOGGER.info("Async long-running get with timeout called on thread " + Thread.currentThread().getName());
            asyncResponse.setTimeoutHandler(new TimeoutHandler() {


                @Override
                public void handleTimeout(final AsyncResponse asyncResponse) {
                    asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE)
                            .entity("Operation time out.").build());

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//    @Resource(name = "DefaultManagedThreadFactory")
//    ManagedThreadFactory threadFactory;
    
    @GET
    public void getList(@Suspended final AsyncResponse ar) throws NamingException {
        ar.setTimeoutHandler(new TimeoutHandler() {


            @Override
            public void handleTimeout(AsyncResponse ar) {
                ar.resume("Operation timed out");
            }

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