org.springframework.webflow.engine.ActionExecutor Maven / Gradle / Ivy
/*
* Copyright 2002-2006 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.webflow.engine;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.webflow.execution.Action;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.RequestContext;
/**
* A simple static helper that performs action execution that encapsulates
* common logging and exception handling logic. This is an internal helper class
* that is not normally used by application code.
*
* @author Keith Donald
* @author Erwin Vervaet
*/
public class ActionExecutor {
private static final Log logger = LogFactory.getLog(ActionExecutor.class);
/**
* Private constructor to avoid instantiation.
*/
private ActionExecutor() {
}
/**
* Execute the given action.
* @param action the action to execute
* @param context the flow execution request context
* @return result of action execution
* @throws ActionExecutionException if the action threw an exception while
* executing, the orginal exception is available as the cause if this exception
*/
public static Event execute(Action action, RequestContext context) throws ActionExecutionException {
try {
if (logger.isDebugEnabled()) {
if (context.getCurrentState() == null) {
logger.debug("Executing start " + action + " for flow '" + context.getActiveFlow().getId() + "'");
}
else {
logger.debug("Executing " + action + " in state '" + context.getCurrentState().getId()
+ "' of flow '" + context.getActiveFlow().getId() + "'");
}
}
return action.execute(context);
}
catch (ActionExecutionException e) {
throw e;
}
catch (Exception e) {
// wrap the action as an ActionExecutionException
throw new ActionExecutionException(context.getActiveFlow().getId(),
context.getCurrentState() != null ? context.getCurrentState().getId() : null, action, context
.getAttributes(), e);
}
}
}