protected InputStream getCacheManagerConfigFileInputStream() {
        String configFile = getCacheManagerConfigFile();
        try {
            return ResourceUtils.getInputStreamForPath(configFile);
        } catch (IOException e) {
            throw new IllegalStateException("Unable to obtain input stream for cacheManagerConfigFile ["
                    + configFile + "]", e);
        }
    }
Acquires the InputStream for the ehcache configuration file using
{@link ResourceUtils#getInputStreamForPath(String) ResourceUtils.getInputStreamForPath} with the
path returned from {@link #getCacheManagerConfigFile() getCacheManagerConfigFile()}.

@return the InputStream for the ehcache configuration file.
support/ehcache/src/main/java/org/apache/shiro/cache/ehcache/EhCacheManager.java