Example usage for javax.servlet ServletRequest startAsync

Introduction

In this page you can find the example usage for javax.servlet ServletRequest startAsync.

Prototype

public AsyncContext startAsync() throws IllegalStateException;

Source Link

Document

Puts this request into asynchronous mode, and initializes its AsyncContext with the original (unwrapped) ServletRequest and ServletResponse objects.

Usage

From source file:org.springframework.http.server.reactive.ServletHttpHandlerAdapter.java

@Override
public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
    if (DispatcherType.ASYNC.equals(request.getDispatcherType())) {
        Throwable ex = (Throwable) request.getAttribute(WRITE_ERROR_ATTRIBUTE_NAME);
        throw new ServletException("Write publisher error", ex);
    }//from  w w  w  .java2s. c o m

    // Start async before Read/WriteListener registration
    AsyncContext asyncContext = request.startAsync();
    asyncContext.setTimeout(-1);

    ServerHttpRequest httpRequest = createRequest(((HttpServletRequest) request), asyncContext);
    ServerHttpResponse httpResponse = createResponse(((HttpServletResponse) response), asyncContext);

    if (HttpMethod.HEAD.equals(httpRequest.getMethod())) {
        httpResponse = new HttpHeadResponseDecorator(httpResponse);
    }

    AtomicBoolean isCompleted = new AtomicBoolean();
    HandlerResultAsyncListener listener = new HandlerResultAsyncListener(isCompleted);
    asyncContext.addListener(listener);

    HandlerResultSubscriber subscriber = new HandlerResultSubscriber(asyncContext, isCompleted);
    this.httpHandler.handle(httpRequest, httpResponse).subscribe(subscriber);
}

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