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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;
/**
* A wrapper to make exceptions leaking into Jetty easier to track. Jetty
* swallows all information about where an exception was thrown, so this wrapper
* ensures some extra information is automatically added to the contents of
* getMessage().
*
* @author Steinar Knutsen
*/
public class ExceptionWrapper extends RuntimeException {
private final String message;
/**
* Update if serializable contents are added.
*/
private static final long serialVersionUID = 1L;
public ExceptionWrapper(Throwable t) {
super(t);
this.message = formatMessage(t);
}
// If calling methods from the constructor, it makes life easier if the
// methods are static...
private static String formatMessage(final Throwable t) {
StringBuilder b = new StringBuilder();
Throwable cause = t;
while (cause != null) {
StackTraceElement[] trace = cause.getStackTrace();
String currentMsg = cause.getMessage();
if (b.length() > 0) {
b.append(": ");
}
b.append(t.getClass().getSimpleName()).append('(');
if (currentMsg != null) {
b.append('"').append(currentMsg).append('"');
}
b.append(')');
if (trace.length > 0) {
b.append(" at ").append(trace[0].getClassName()).append('(');
if (trace[0].getFileName() != null) {
b.append(trace[0].getFileName()).append(':')
.append(trace[0].getLineNumber());
}
b.append(')');
}
cause = cause.getCause();
}
return b.toString();
}
@Override
public String getMessage() {
return message;
}
}
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