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Adding deeper logging to Webflow Exceptions

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Adding deeper logging to Webflow Exceptions

· Java Zone
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If you've been using Roo and the JSPX views with WebFlow, you've probably noticed that you don't get the embedded stack trace in the errors that result.  You can fix this with a lifecycle listener:

First, define the class:

package mypackage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.webflow.execution.FlowExecutionException;
import org.springframework.webflow.execution.FlowExecutionListenerAdapter;
import org.springframework.webflow.execution.RequestContext;

public class LoggingFlowExecutionListener extends FlowExecutionListenerAdapter {
Logger logger = LoggerFactory.getLogger(
@Override
public void exceptionThrown(RequestContext context,
FlowExecutionException exception) {
super.exceptionThrown(context, exception);
logger.error("Webflow " + context.getActiveFlow().getId() +
" threw exception in " + context.getCurrentState().getId(), exception);
}
}

Then, in webflow-config.xml, replace

<webflow:flow-executor id="flowExecutor" />

with

<webflow:flow-executor id="flowExecutor">
<webflow:flow-execution-listeners>
<webflow:listener ref="loggingListener"/>
</webflow:flow-execution-listeners>
</webflow:flow-executor>

<bean class="mypackage.LoggingFlowExecutionListener" id="loggingListener" />

Now you can enjoy useful logging from your Webflow exceptions.

From http://www.rimple.com/tech/2011/2/28/adding-deeper-logging-to-webflow-exceptions.html

Download Building Reactive Microservices in Java: Asynchronous and Event-Based Application Design. Brought to you in partnership with Red Hat

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