Github user mattf-horton commented on a diff in the pull request: https://github.com/apache/metron/pull/530#discussion_r129968508 --- Diff: bundles-lib/src/main/java/org/apache/metron/bundles/util/VFSClassloaderUtil.java --- @@ -0,0 +1,178 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.metron.bundles.util; + +import org.apache.accumulo.start.classloader.vfs.UniqueFileReplicator; +import org.apache.commons.vfs2.*; +import org.apache.commons.vfs2.cache.SoftRefFilesCache; +import org.apache.commons.vfs2.impl.DefaultFileSystemManager; +import org.apache.commons.vfs2.impl.FileContentInfoFilenameFactory; +import org.apache.commons.vfs2.impl.VFSClassLoader; +import org.apache.commons.vfs2.provider.hdfs.HdfsFileProvider; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.File; +import java.util.ArrayList; +import java.util.Optional; + +public class VFSClassloaderUtil { + private static final Logger LOG = LoggerFactory.getLogger(VFSClassloaderUtil.class); + + /** + * Create a FileSystem manager suitable for our purposes. + * This manager supports files of the following types: + * * res - resource files + * * jar + * * tar + * * bz2 + * * tgz + * * zip + * * HDFS + * * FTP + * * HTTP/S + * * file + * @return + * @throws FileSystemException + */ + public static FileSystemManager generateVfs() throws FileSystemException { + return generateVfs(null); + } + public static FileSystemManager generateVfs(String jarExtensionToRegister) throws FileSystemException { + DefaultFileSystemManager vfs = new DefaultFileSystemManager(); + + if(jarExtensionToRegister == null || StringUtils.isBlank(jarExtensionToRegister) ) { + vfs.addExtensionMap(jarExtensionToRegister, "jar"); + vfs.addProvider(jarExtensionToRegister, new org.apache.commons.vfs2.provider.jar.JarFileProvider()); + } --- End diff -- This doesn't seem right. Did you perhaps intend the negative of the conditional, ie `if (jarExtensionToRegister != null && !StringUtils.isBlank(jarExtensionToRegister) ) {...`
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