Example usage for javax.servlet.http HttpServletRequest isAsyncSupported

Introduction

In this page you can find the example usage for javax.servlet.http HttpServletRequest isAsyncSupported.

Prototype

public boolean isAsyncSupported();

Source Link

Document

Checks if this request supports asynchronous operation.

Usage

From source file:com.kurento.kmf.content.internal.base.AbstractContentHandlerServlet.java

@Override
protected final void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {

    getLogger().info("POST request received: " + req.getRequestURI());

    if (!req.isAsyncSupported()) {
        // Async context could not be created. It is not necessary to
        // complete it. Just send error message to
        ServletUtils.sendHttpError(req, resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                "AsyncContext could not be started. The application should add \"asyncSupported = true\" in all "
                        + this.getClass().getName() + " instances and in all filters in the associated chain");
        return;//from  w w w .j  a  v a2  s  . c om
    }
    if (handler == null) {
        ServletUtils.sendHttpError(req, resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                handler.getClass().getSimpleName() + " is null. This error means that you "
                        + "need to provide a valid implementation of interface "
                        + handler.getClass().getSimpleName());
        return;
    }

    String contentId = req.getPathInfo();
    if (contentId != null) {
        contentId = contentId.substring(1);
    }

    AsyncContext asyncCtx = req.startAsync();

    // Add listener for managing error conditions
    asyncCtx.addListener(new ContentAsyncListener());

    if (useControlProtocol) {
        doRequest4JsonControlProtocol(asyncCtx, contentId, resp);
    } else {
        // TODO: we should check that the content type correspond to
        // the ones we support. We should avoid receiving application/json
        // here and send a coherent error message in that case because this
        // case corresponds to using incorrectly annotations on handlers
        doRequest4SimpleHttpProtocol(asyncCtx, contentId, resp);
    }
}

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From source file:com.kurento.kmf.content.internal.base.AbstractContentHandlerServlet.java

@Override
protected final void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {

    if (useControlProtocol) {
        ServletUtils.sendHttpError(req, resp, HttpServletResponse.SC_NOT_IMPLEMENTED,
                "Only POST request are supported for this service. You can enable GET requests "
                        + " by setting useControlProtocol to false on the appropriate handler annotation");
        return;//  ww w  .  ja  v a 2  s . c o m
    }

    getLogger().info("GET request received: " + req.getRequestURI());

    if (!req.isAsyncSupported()) {
        // Async context could not be created. It is not necessary to
        // complete it. Just send error message to
        ServletUtils.sendHttpError(req, resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                "AsyncContext could not be started. The application should add \"asyncSupported = true\" in all "
                        + this.getClass().getName() + " instances and in all filters in the associated chain");
        return;
    }
    if (handler == null) {
        ServletUtils.sendHttpError(req, resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                handler.getClass().getSimpleName() + " is null. This error means that you "
                        + "need to provide a valid implementation of interface "
                        + handler.getClass().getSimpleName());
        return;
    }

    String contentId = req.getPathInfo();
    if (contentId != null) {
        contentId = contentId.substring(1);
    }

    AsyncContext asyncCtx = req.startAsync();

    // Add listener for managing error conditions
    asyncCtx.addListener(new ContentAsyncListener());

    doRequest4SimpleHttpProtocol(asyncCtx, contentId, resp);

}

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