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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
PortletExceptionPresenter.java | 0% | 0% | 0% | 0% |
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// Copyright 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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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.AsciiMarkupFilter;
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import org.apache.tapestry.markup.MarkupWriterImpl;
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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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/**
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* Service used to present a runtime exception to the user. This is very tricky in the Portlet world
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* because of the split between the action and render requests (much more likely to get an error
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* during the action request than during the render request, but both are possible).
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* <p>
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* During an action request, this code will render the HTML markup for the exception into a buffer
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* that is stored as persistent attribute in the portal session.
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*
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* @author Howard M. Lewis Ship
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* @since 4.0
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*/
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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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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
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reportActionRequestException(cycle, cause); |
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} |
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catch (Exception ex)
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{ |
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// Worst case scenario. The exception page itself is broken, leaving
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// us with no option but to write the cause to the output.
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// Also, write the exception thrown when redendering the exception
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// page, so that can get fixed as well.
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_requestExceptionReporter.reportRequestException(PortletMessages |
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.errorReportingException(ex), ex); |
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// And throw the exception.
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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, 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 = new MarkupWriterImpl("text/html", pw, new AsciiMarkupFilter()); |
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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, |
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markup); |
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ActionResponse response = _globals.getActionResponse(); |
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response.setRenderParameter(ServiceConstants.SERVICE, PortletConstants.EXCEPTION_SERVICE); |
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} |
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private void reportRenderRequestException(IRequestCycle cycle, 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 = new MarkupWriterImpl("text/html", pw, new AsciiMarkupFilter()); |
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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(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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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, 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)
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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, Throwable cause) |
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{ |
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ExceptionDescription[] exceptions = new ExceptionAnalyzer().analyze(cause);
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for (int i = 0; i < exceptions.length; i++) |
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writeException(writer, cycle, exceptions[i], i + 1 == exceptions.length); |
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} |
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} |
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