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eagerly load NestedExceptionUtils to avoid potential getMessage deadlock on OSGi (SPR-5607)

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This commit is contained in:
Juergen Hoeller
2009-05-11 22:22:11 +00:00
parent 796a457d9f
commit b72af54f53
4 changed files with 42 additions and 12 deletions
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21
org.springframework.web/src/main/java/org/springframework/web/util/NestedServletException.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2007 the original author or authors.
* Copyright 2002-2009 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.
@@ -21,14 +21,17 @@ import javax.servlet.ServletException;
import org.springframework.core.NestedExceptionUtils;
/**
* Subclass of ServletException that properly handles a root cause in terms
* Subclass of {@link ServletException} that properly handles a root cause in terms
* of message and stacktrace, just like NestedChecked/RuntimeException does.
* Note that the plain ServletException doesn't expose its root cause at all,
* neither in the exception message nor in printed stack traces!
*
* <p>Note that the plain ServletException doesn't expose its root cause at all,
* neither in the exception message nor in printed stack traces! While this might
* be fixed in later Servlet API variants (which even differ per vendor for the
* same API version), it is not reliably available on Servlet 2.4 (the minimum
* version required by Spring 3.x), which is why we need to do it ourselves.
*
* <p>The similarity between this class and the NestedChecked/RuntimeException
* class is unavoidable, as this class needs to derive from ServletException
* and cannot derive from NestedCheckedException.
* class is unavoidable, as this class needs to derive from ServletException.
*
* @author Juergen Hoeller
* @since 1.2.5
@@ -42,6 +45,12 @@ public class NestedServletException extends ServletException {
/** Use serialVersionUID from Spring 1.2 for interoperability */
private static final long serialVersionUID = -5292377985529381145L;
static {
// Eagerly load the NestedExceptionUtils class to avoid classloader deadlock
// issues on OSGi when calling getMessage(). Reported by Don Brown; SPR-5607.
NestedExceptionUtils.class.getName();
}
/**
* Construct a <code>NestedServletException</code> with the specified detail message.