Example usage for javax.servlet.http HttpServletResponse resetBuffer

Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse resetBuffer.

Prototype


public void resetBuffer();

Source Link

Document

Clears the content of the underlying buffer in the response without clearing headers or status code.

Usage

From source file:org.pentaho.platform.web.http.api.resources.XactionUtil.java

public static String postExecute(IRuntimeContext runtime, boolean debugMessages, boolean doWrapper,
        IOutputHandler outputHandler, Map<String, IParameterProvider> parameterProviders,
        HttpServletRequest request, HttpServletResponse response, List<?> messages) throws Exception {
    StringBuffer buffer = new StringBuffer();

    boolean hasResponse = outputHandler.isResponseExpected();
    IContentItem responseContentItem = outputHandler.getOutputContentItem(IOutputHandler.RESPONSE,
            IOutputHandler.CONTENT, null, null);

    boolean success = (runtime != null && runtime.getStatus() == IRuntimeContext.RUNTIME_STATUS_SUCCESS);
    boolean printSuccess = (runtime != null) && success && (!hasResponse || debugMessages);
    boolean printError = (runtime != null) && !success && !response.isCommitted();

    if (printSuccess || printError) {
        final String htmlMimeType = "text/html"; //$NON-NLS-1$
        responseContentItem.setMimeType(htmlMimeType);
        response.setContentType(htmlMimeType);
        IMessageFormatter formatter = PentahoSystem.get(IMessageFormatter.class,
                PentahoSessionHolder.getSession());

        if (printSuccess) {
            formatter.formatSuccessMessage(htmlMimeType, runtime, buffer, debugMessages, doWrapper);
        } else {// w  w  w . j  a  va2  s .  com
            response.resetBuffer();
            formatter.formatFailureMessage(htmlMimeType, runtime, buffer, messages);
        }
    }
    return buffer.toString();
}

From source file:org.pentaho.platform.web.servlet.ViewAction.java

@SuppressWarnings("unchecked")
protected void handleActionRequest(final HttpServletRequest request, final HttpServletResponse response,
        final IOutputHandler outputHandler, final HttpServletRequestHandler requestHandler,
        OutputStream outputStream, final IContentItem contentItem) throws ServletException, IOException {
    IRuntimeContext runtime = null;//  w w  w .j a v  a  2  s  .  c  om
    try {
        runtime = requestHandler.handleActionRequest(0, 0);

        if (runtime == null) {
            StringBuffer buffer = new StringBuffer();
            for (String message : (List<String>) requestHandler.getMessages()) {
                buffer.append(message);
            }
            outputStream.write(buffer.toString().getBytes(LocaleHelper.getSystemEncoding()));
            return;
        }

        /*
         * the flag "hasResponse" should be set if the outputHandler is expected to serve a response back via either the
         * "response.content" output (a final content output), or an intermediate response such as a form to request
         * parameters such as from a SecureFilterComponent.
         */
        boolean hasResponse = outputHandler.isResponseExpected();
        IContentItem responseContentItem = outputHandler.getOutputContentItem(IOutputHandler.RESPONSE,
                IOutputHandler.CONTENT, null, null);

        boolean success = (runtime != null && runtime.getStatus() == IRuntimeContext.RUNTIME_STATUS_SUCCESS);
        boolean debugMessages = doMessages(request);
        boolean printSuccess = (runtime != null) && success && (!hasResponse || debugMessages);
        boolean printError = (runtime != null) && !success && !response.isCommitted();

        if (printSuccess || printError) {
            final String htmlMimeType = "text/html"; //$NON-NLS-1$
            responseContentItem.setMimeType(htmlMimeType);
            // this is going to be the response output stream unless you are in debug mode
            outputStream = responseContentItem.getOutputStream(null);

            response.setContentType(htmlMimeType);
            StringBuffer buffer = new StringBuffer();

            IMessageFormatter formatter = PentahoSystem.get(IMessageFormatter.class,
                    PentahoSessionHolder.getSession());

            if (printSuccess) {
                boolean doWrapper = !("false".equals(request.getParameter("wrapper"))); //$NON-NLS-1$ //$NON-NLS-2$
                formatter.formatSuccessMessage(htmlMimeType, runtime, buffer, debugMessages, doWrapper);
            } else {
                response.resetBuffer();
                formatter.formatFailureMessage(htmlMimeType, runtime, buffer, requestHandler.getMessages());
            }

            outputStream.write(buffer.toString().getBytes(LocaleHelper.getSystemEncoding()));
            responseContentItem.closeOutputStream();
        }
    } finally {
        if (runtime != null) {
            runtime.dispose();
        }
    }
}