/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.interceptor;
import static com.google.common.base.Throwables.getRootCause;
import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import br.com.caelum.vraptor.InterceptionException;
import br.com.caelum.vraptor.Intercepts;
import br.com.caelum.vraptor.Result;
import br.com.caelum.vraptor.controller.ControllerMethod;
import br.com.caelum.vraptor.core.ExceptionMapper;
import br.com.caelum.vraptor.core.ExceptionRecorder;
import br.com.caelum.vraptor.core.InterceptorStack;
/**
* Intercept all requests to handling uncaught exceptions.
* <p>
* This class is a part of Exception Handling Feature.
* </p>
*
* @author Otávio Scherer Garcia
* @since 3.2
*/
@Intercepts
@RequestScoped
public class ExceptionHandlerInterceptor implements Interceptor {
private static final Logger logger = LoggerFactory.getLogger(ExceptionHandlerInterceptor.class);
private final ExceptionMapper exceptions;
private final Result result;
/**
* @deprecated CDI eyes only
*/
protected ExceptionHandlerInterceptor() {
this(null, null);
}
@Inject
public ExceptionHandlerInterceptor(ExceptionMapper exceptions, Result result) {
this.exceptions = exceptions;
this.result = result;
}
@Override
public boolean accepts(ControllerMethod method) {
return true;
}
@Override
public void intercept(InterceptorStack stack, ControllerMethod method, Object controllerInstance)
throws InterceptionException {
try {
stack.next(method, controllerInstance);
} catch (InterceptionException e) {
if (!(e.getCause() instanceof Exception) || !replay((Exception) e.getCause())) {
throw e;
}
}
}
protected void reportException(Exception e) {
result.include("exception", getRootCause(e));
}
protected boolean replay(Exception e) {
ExceptionRecorder<Result> exresult = exceptions.findByException(e);
if (exresult == null) {
return false;
}
reportException(e);
logger.debug("handling exception {}", e.getClass(), e);
exresult.replay(result);
return true;
}
}