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package org.apache.tapestry.portlet; |
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import java.io.CharArrayWriter; |
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import java.io.IOException; |
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import java.io.PrintWriter; |
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import javax.portlet.ActionResponse; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.tapestry.IMarkupWriter; |
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import org.apache.tapestry.IRequestCycle; |
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import org.apache.tapestry.describe.RenderStrategy; |
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import org.apache.tapestry.error.ErrorMessages; |
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import org.apache.tapestry.error.ExceptionPresenter; |
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import org.apache.tapestry.error.RequestExceptionReporter; |
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import org.apache.tapestry.markup.MarkupWriterSource; |
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import org.apache.tapestry.services.ServiceConstants; |
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import org.apache.tapestry.util.ContentType; |
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import org.apache.tapestry.util.exception.ExceptionAnalyzer; |
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import org.apache.tapestry.util.exception.ExceptionDescription; |
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import org.apache.tapestry.util.exception.ExceptionProperty; |
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import org.apache.tapestry.web.WebRequest; |
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import org.apache.tapestry.web.WebResponse; |
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public class PortletExceptionPresenter implements ExceptionPresenter |
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{ |
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private PortletRequestGlobals _globals; |
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private RenderStrategy _renderStrategy; |
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private WebRequest _request; |
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private RequestExceptionReporter _requestExceptionReporter; |
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private WebResponse _response; |
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private MarkupWriterSource _markupWriterSource; |
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public void presentException(IRequestCycle cycle, Throwable cause) |
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{ |
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try |
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{ |
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if (_globals.isRenderRequest()) |
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reportRenderRequestException(cycle, cause); |
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else reportActionRequestException(cycle, cause); |
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} |
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catch (Exception ex) |
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{ |
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_requestExceptionReporter.reportRequestException(PortletMessages |
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.errorReportingException(ex), ex); |
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throw new ApplicationRuntimeException(ex.getMessage(), ex); |
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} |
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_requestExceptionReporter.reportRequestException(ErrorMessages |
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.unableToProcessClientRequest(cause), cause); |
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} |
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private void reportActionRequestException(IRequestCycle cycle, |
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Throwable cause) |
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{ |
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CharArrayWriter caw = new CharArrayWriter(); |
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PrintWriter pw = new PrintWriter(caw); |
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IMarkupWriter writer = _markupWriterSource.newMarkupWriter(pw, |
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new ContentType("text/html")); |
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writeException(writer, cycle, cause); |
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writer.close(); |
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String markup = caw.toString(); |
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_request.getSession(true).setAttribute( |
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PortletConstants.PORTLET_EXCEPTION_MARKUP_ATTRIBUTE, markup); |
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ActionResponse response = _globals.getActionResponse(); |
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response.setRenderParameter(ServiceConstants.SERVICE, |
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PortletConstants.EXCEPTION_SERVICE); |
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} |
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private void reportRenderRequestException(IRequestCycle cycle, |
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Throwable cause) |
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throws IOException |
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{ |
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PrintWriter pw = _response.getPrintWriter(new ContentType("text/html")); |
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IMarkupWriter writer = _markupWriterSource.newMarkupWriter(pw, |
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new ContentType("text/html")); |
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writeException(writer, cycle, cause); |
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} |
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public void setGlobals(PortletRequestGlobals globals) |
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{ |
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_globals = globals; |
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} |
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public void setRenderStrategy(RenderStrategy renderStrategy) |
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{ |
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_renderStrategy = renderStrategy; |
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} |
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public void setRequest(WebRequest request) |
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{ |
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_request = request; |
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} |
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public void setRequestExceptionReporter( |
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RequestExceptionReporter requestExceptionReporter) |
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{ |
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_requestExceptionReporter = requestExceptionReporter; |
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} |
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public void setResponse(WebResponse response) |
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{ |
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_response = response; |
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} |
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public void setMarkupWriterSource(MarkupWriterSource markupWriterSource) |
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{ |
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_markupWriterSource = markupWriterSource; |
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} |
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private void writeException(IMarkupWriter writer, IRequestCycle cycle, |
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ExceptionDescription exception, boolean showStackTrace) |
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{ |
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writer.begin("div"); |
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writer.attribute("class", "portlet-section-header"); |
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writer.print(exception.getExceptionClassName()); |
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writer.end(); |
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writer.println(); |
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writer.begin("div"); |
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writer.attribute("class", "portlet-msg-error"); |
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writer.print(exception.getMessage()); |
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writer.end(); |
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writer.println(); |
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ExceptionProperty[] properties = exception.getProperties(); |
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if (properties.length > 0) |
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{ |
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writer.begin("table"); |
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writer.attribute("class", "portlet-section-subheader"); |
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for(int i = 0; i < properties.length; i++) |
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{ |
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writer.begin("tr"); |
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writer.attribute("class", i % 2 == 0 ? "portlet-section-body" |
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: "portlet-section-alternate"); |
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writer.begin("th"); |
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writer.print(properties[i].getName()); |
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writer.end(); |
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writer.println(); |
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writer.begin("td"); |
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_renderStrategy.renderObject(properties[i].getValue(), writer, |
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cycle); |
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writer.end("tr"); |
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writer.println(); |
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} |
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writer.end(); |
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writer.println(); |
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} |
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if (!showStackTrace) return; |
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writer.begin("ul"); |
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String[] trace = exception.getStackTrace(); |
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for(int i = 0; i < trace.length; i++) |
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{ |
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writer.begin("li"); |
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writer.print(trace[i]); |
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writer.end(); |
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writer.println(); |
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} |
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writer.end(); |
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writer.println(); |
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} |
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private void writeException(IMarkupWriter writer, IRequestCycle cycle, |
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Throwable cause) |
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{ |
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ExceptionDescription[] exceptions = new ExceptionAnalyzer() |
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.analyze(cause); |
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for(int i = 0; i < exceptions.length; i++) |
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writeException(writer, cycle, exceptions[i], |
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i + 1 == exceptions.length); |
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} |
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} |