org.jboss.weld.exceptions.WeldExceptionListMessage Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source
* Copyright 2008, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.weld.exceptions;
import java.io.ObjectStreamException;
import java.io.PrintWriter;
import java.io.Serializable;
import java.io.StringWriter;
import java.util.List;
/**
* Exception message that produces a list of exceptions and their stack traces
* for logging. This is typically used in lifecycle events which accumulate
* exceptions across observers.
*
* @author David Allen
*/
public class WeldExceptionListMessage implements WeldExceptionMessage, Serializable {
private static final long serialVersionUID = 3445187707771082346L;
private List causes;
private String message;
public WeldExceptionListMessage(List throwables) {
this.causes = throwables;
}
public String getAsString() {
if (message == null) {
generateMessage();
}
return message;
}
private void generateMessage() {
StringWriter writer = new StringWriter();
PrintWriter messageBuffer = new PrintWriter(writer);
messageBuffer.print("Exception List with ");
messageBuffer.print(causes.size());
messageBuffer.print(" exceptions:\n");
int i = 0;
for (Throwable throwable : causes) {
messageBuffer.print("Exception ");
messageBuffer.print(i);
messageBuffer.print(" :\n");
throwable.printStackTrace(messageBuffer);
}
messageBuffer.flush();
message = writer.toString();
}
private Object writeReplace() throws ObjectStreamException {
return new WeldExceptionStringMessage(getAsString());
}
}