phrocker commented on a change in pull request #489: MINIFICPP-740: Add ability to run NiFi processors from Java and Python URL: https://github.com/apache/nifi-minifi-cpp/pull/489#discussion_r261014684
########## File path: extensions/jni/nifi-framework-jni/src/main/java/org/apache/nifi/nar/JniUnpacker.java ########## @@ -0,0 +1,398 @@ +/* + * 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.nifi.nar; + +import org.apache.nifi.bundle.BundleCoordinate; +import org.apache.nifi.util.FileUtils; +import org.apache.nifi.util.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.*; +import java.nio.file.Files; +import java.nio.file.Path; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.util.*; +import java.util.concurrent.TimeUnit; +import java.util.jar.Attributes; +import java.util.jar.JarEntry; +import java.util.jar.JarFile; +import java.util.jar.Manifest; + +/** + * Should change NarPacker so that we can depend on it a little more for our purposes. + */ +public class JniUnpacker { + + private static final Logger logger = LoggerFactory.getLogger(JniUnpacker.class); + private static String HASH_FILENAME = "nar-md5sum"; + + private static final Map<String,File> narMaps = new HashMap<>(); + private static final Map<String,String> narDependencies = new HashMap<>(); + + private static final FileFilter NAR_FILTER = new FileFilter() { + @Override + public boolean accept(File pathname) { + final String nameToTest = pathname.getName().toLowerCase(); + return nameToTest.endsWith(".nar") && pathname.isFile(); + } + }; + + + public static Optional<String> getDependency(final String narId){ + return Optional.of( narDependencies.get(narId) ); + } + + public static Optional<File> getDirectory(final String narId){ + return Optional.of( narMaps.get(narId) ); + } + + public static ExtensionMapping unpackNars(final File narFilesDir, final File unpackDirectory, final File docsWorkingDir, List<File> paths ) throws IOException { + final List<Path> narLibraryDirs = new ArrayList<>(); + final Map<File, BundleCoordinate> unpackedNars = new HashMap<>(); + + final Path narFilesPath = narFilesDir.toPath(); + narLibraryDirs.add(narFilesPath); + + try { + File unpackedFramework = null; + final Set<File> unpackedExtensions = new HashSet<>(); + final List<File> narFiles = new ArrayList<>(); + + // make sure the nar directories are there and accessible + FileUtils.ensureDirectoryExistAndCanReadAndWrite(unpackDirectory); + + for (Path narLibraryDir : narLibraryDirs) { + + File narDir = narLibraryDir.toFile(); + + // Test if the source NARs can be read + FileUtils.ensureDirectoryExistAndCanRead(narDir); + + File[] dirFiles = narDir.listFiles(NAR_FILTER); + if (dirFiles != null) { + List<File> fileList = Arrays.asList(dirFiles); + narFiles.addAll(fileList); + } + } + + if (!narFiles.isEmpty()) { + final long startTime = System.nanoTime(); + logger.info("Expanding " + narFiles.size() + " NAR files with all processors..."); + for (File narFile : narFiles) { + logger.debug("Expanding NAR file: " + narFile.getAbsolutePath() + " to " + unpackDirectory); + + // get the manifest for this nar + try (final JarFile nar = new JarFile(narFile)) { + logger.debug("Expanding NAR file: " + nar.getName()); + final Manifest manifest = nar.getManifest(); + + // lookup the nar id + final Attributes attributes = manifest.getMainAttributes(); + final String groupId = attributes.getValue(NarManifestEntry.NAR_GROUP.getManifestName()); + final String narId = attributes.getValue(NarManifestEntry.NAR_ID.getManifestName()); + final String version = attributes.getValue(NarManifestEntry.NAR_VERSION.getManifestName()); + final String dependencyId = attributes.getValue(NarManifestEntry.NAR_DEPENDENCY_ID.getManifestName()); + logger.debug("Expanding NAR file: " + nar.getName() + " has dependency " + dependencyId); + narMaps.put(narId,narFilesDir); + narDependencies.put(narId,dependencyId); + // determine if this is the framework + if (NarClassLoaders.FRAMEWORK_NAR_ID.equals(narId)) { + if (unpackedFramework != null) { + throw new IllegalStateException("Multiple framework NARs discovered. Only one framework is permitted."); + } + + // unpack the framework nar + unpackedFramework = unpackNar(narFile,paths, unpackDirectory); + } else { + final File unpackedExtension = unpackNar(narFile,paths, unpackDirectory); + + // record the current bundle + unpackedNars.put(unpackedExtension, new BundleCoordinate(groupId, narId, version)); + + // unpack the extension nar + unpackedExtensions.add(unpackedExtension); + } + } + } + + final long duration = System.nanoTime() - startTime; + logger.info("NAR loading process took " + duration + " nanoseconds " + + "(" + (int) TimeUnit.SECONDS.convert(duration, TimeUnit.NANOSECONDS) + " seconds)."); + } + + // attempt to delete any docs files that exist so that any components that have been removed + // will no longer have entries in the docs folder + final File[] docsFiles = docsWorkingDir.listFiles(); + if (docsFiles != null) { + for (final File file : docsFiles) { + FileUtils.deleteFile(file, true); + } + } + + final ExtensionMapping extensionMapping = new ExtensionMapping(); + mapExtensions(unpackedNars, docsWorkingDir, extensionMapping); + + return extensionMapping; + } catch (IOException e) { + logger.warn("Unable to load NAR library bundles due to " + e + " Will proceed without loading any further Nar bundles"); + if (logger.isDebugEnabled()) { + logger.warn("", e); + } + } + + return null; + } + + private static void mapExtensions(final Map<File, BundleCoordinate> unpackedNars, final File docsDirectory, final ExtensionMapping mapping) throws IOException { + for (final Map.Entry<File, BundleCoordinate> entry : unpackedNars.entrySet()) { + final File unpackedNar = entry.getKey(); + final BundleCoordinate bundleCoordinate = entry.getValue(); + + final File bundledDependencies = new File(unpackedNar, "NAR-INF/bundled-dependencies"); + + unpackBundleDocs(docsDirectory, mapping, bundleCoordinate, bundledDependencies); Review comment: nm i don't think i could really get all the information I need without loading processors anyway. good point re the docs. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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