https://bz.apache.org/bugzilla/show_bug.cgi?id=64503
--- Comment #4 from Michael Seele <mse...@guh-software.de> ---
Thanks for the answer, Mark.
Just for the record, here is how I solved it:
I created a new helper method that acts like a wrapper for the mapping
function:
public static <T, R> Function<T, R> parallel(Function<T, R> function) {
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
return input -> {
Thread thread = Thread.currentThread();
ClassLoader originalTccl = thread.getContextClassLoader();
try {
thread.setContextClassLoader(tccl);
return function.apply(input);
} finally {
thread.setContextClassLoader(originalTccl);
}
};
}
The method is used this way and solves the problem:
List<String> values = keys.parallelStream().map(parallel(key -> {
try {
return (String) InitialContext.doLookup(DEFAULT_CONTEXT + key);
} catch (NamingException e) {
throw new RuntimeException("Error on lookup", e); //$NON-NLS-1$
}
})).collect(Collectors.toList());
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