| /* |
| * 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.registry.provider.extension; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.nifi.registry.extension.BundleCoordinate; |
| import org.apache.nifi.registry.extension.BundlePersistenceContext; |
| import org.apache.nifi.registry.extension.BundlePersistenceException; |
| import org.apache.nifi.registry.extension.BundlePersistenceProvider; |
| import org.apache.nifi.registry.extension.BundleVersionCoordinate; |
| import org.apache.nifi.registry.extension.BundleVersionType; |
| import org.apache.nifi.registry.flow.FlowPersistenceException; |
| import org.apache.nifi.registry.provider.ProviderConfigurationContext; |
| import org.apache.nifi.registry.provider.ProviderCreationException; |
| import org.apache.nifi.registry.util.FileUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.BufferedInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Map; |
| |
| /** |
| * An {@link BundlePersistenceProvider} that uses local file-system for storage. |
| */ |
| public class FileSystemBundlePersistenceProvider implements BundlePersistenceProvider { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(FileSystemBundlePersistenceProvider.class); |
| |
| static final String BUNDLE_STORAGE_DIR_PROP = "Extension Bundle Storage Directory"; |
| |
| static final String NAR_EXTENSION = ".nar"; |
| static final String CPP_EXTENSION = ".cpp"; |
| |
| private File bundleStorageDir; |
| |
| @Override |
| public void onConfigured(final ProviderConfigurationContext configurationContext) |
| throws ProviderCreationException { |
| final Map<String,String> props = configurationContext.getProperties(); |
| if (!props.containsKey(BUNDLE_STORAGE_DIR_PROP)) { |
| throw new ProviderCreationException("The property " + BUNDLE_STORAGE_DIR_PROP + " must be provided"); |
| } |
| |
| final String bundleStorageDirValue = props.get(BUNDLE_STORAGE_DIR_PROP); |
| if (StringUtils.isBlank(bundleStorageDirValue)) { |
| throw new ProviderCreationException("The property " + BUNDLE_STORAGE_DIR_PROP + " cannot be null or blank"); |
| } |
| |
| try { |
| bundleStorageDir = new File(bundleStorageDirValue); |
| FileUtils.ensureDirectoryExistAndCanReadAndWrite(bundleStorageDir); |
| LOGGER.info("Configured BundlePersistenceProvider with Extension Bundle Storage Directory {}", |
| new Object[] {bundleStorageDir.getAbsolutePath()}); |
| } catch (IOException e) { |
| throw new ProviderCreationException(e); |
| } |
| } |
| |
| @Override |
| public synchronized void createBundleVersion(final BundlePersistenceContext context, final InputStream contentStream) |
| throws BundlePersistenceException { |
| saveOrUpdateBundleVersion(context, contentStream, false); |
| } |
| |
| @Override |
| public synchronized void updateBundleVersion(final BundlePersistenceContext context, final InputStream contentStream) throws BundlePersistenceException { |
| saveOrUpdateBundleVersion(context, contentStream, true); |
| } |
| |
| private synchronized void saveOrUpdateBundleVersion(final BundlePersistenceContext context, final InputStream contentStream, |
| final boolean overwrite) throws BundlePersistenceException { |
| final BundleVersionCoordinate versionCoordinate = context.getCoordinate(); |
| final File bundleVersionDir = getBundleVersionDirectory(bundleStorageDir, versionCoordinate); |
| try { |
| FileUtils.ensureDirectoryExistAndCanReadAndWrite(bundleVersionDir); |
| } catch (IOException e) { |
| throw new FlowPersistenceException("Error accessing directory for extension bundle version at " |
| + bundleVersionDir.getAbsolutePath(), e); |
| } |
| |
| final File bundleFile = getBundleFile(bundleVersionDir, versionCoordinate); |
| if (bundleFile.exists() && !overwrite) { |
| final String existingPath = bundleFile.getAbsolutePath(); |
| throw new BundlePersistenceException("Unable to save because a bundle versions already exists at " + existingPath); |
| } |
| |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Writing extension bundle to {}", new Object[]{bundleFile.getAbsolutePath()}); |
| } |
| |
| try (final OutputStream out = new FileOutputStream(bundleFile)) { |
| IOUtils.copy(contentStream, out); |
| out.flush(); |
| } catch (Exception e) { |
| throw new FlowPersistenceException("Unable to write bundle file to disk due to " + e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public synchronized void getBundleVersionContent(final BundleVersionCoordinate versionCoordinate, final OutputStream outputStream) |
| throws BundlePersistenceException { |
| |
| final File bundleFile = getBundleFile(versionCoordinate); |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Reading extension bundle from {}", new Object[]{bundleFile.getAbsolutePath()}); |
| } |
| |
| try (final InputStream in = new FileInputStream(bundleFile); |
| final BufferedInputStream bufIn = new BufferedInputStream(in)) { |
| IOUtils.copy(bufIn, outputStream); |
| outputStream.flush(); |
| } catch (FileNotFoundException e) { |
| throw new BundlePersistenceException("Extension bundle content was not found for: " + bundleFile.getAbsolutePath(), e); |
| } catch (IOException e) { |
| throw new BundlePersistenceException("Error reading extension bundle content", e); |
| } |
| } |
| |
| @Override |
| public synchronized void deleteBundleVersion(final BundleVersionCoordinate versionCoordinate) throws BundlePersistenceException { |
| final File bundleFile = getBundleFile(versionCoordinate); |
| if (!bundleFile.exists()) { |
| LOGGER.warn("Extension bundle content does not exist at {}", new Object[] {bundleFile.getAbsolutePath()}); |
| return; |
| } |
| |
| final boolean deleted = bundleFile.delete(); |
| if (!deleted) { |
| throw new BundlePersistenceException("Unable to delete extension bundle content at " + bundleFile.getAbsolutePath()); |
| } |
| |
| if (LOGGER.isDebugEnabled()) { |
| LOGGER.debug("Deleted extension bundle content at {}", new Object[] {bundleFile.getAbsolutePath()}); |
| } |
| } |
| |
| @Override |
| public synchronized void deleteAllBundleVersions(final BundleCoordinate bundleCoordinate) throws BundlePersistenceException { |
| final File bundleDir = getBundleDirectory(bundleStorageDir, bundleCoordinate); |
| if (!bundleDir.exists()) { |
| LOGGER.warn("Extension bundle directory does not exist at {}", new Object[] {bundleDir.getAbsolutePath()}); |
| return; |
| } |
| |
| // delete everything under the bundle directory |
| try { |
| org.apache.commons.io.FileUtils.cleanDirectory(bundleDir); |
| } catch (IOException e) { |
| throw new FlowPersistenceException("Error deleting extension bundles at " + bundleDir.getAbsolutePath(), e); |
| } |
| |
| // delete the directory for the bundle |
| final boolean bundleDirDeleted = bundleDir.delete(); |
| if (!bundleDirDeleted) { |
| LOGGER.error("Unable to delete extension bundle directory: " + bundleDir.getAbsolutePath()); |
| } |
| |
| // delete the directory for the group and bucket if there is nothing left |
| final File groupDir = bundleDir.getParentFile(); |
| final File[] groupFiles = groupDir.listFiles(); |
| if (groupFiles.length == 0) { |
| final boolean deletedGroup = groupDir.delete(); |
| if (!deletedGroup) { |
| LOGGER.error("Unable to delete group directory: " + groupDir.getAbsolutePath()); |
| } else { |
| final File bucketDir = groupDir.getParentFile(); |
| final File[] bucketFiles = bucketDir.listFiles(); |
| if (bucketFiles.length == 0){ |
| final boolean deletedBucket = bucketDir.delete(); |
| if (!deletedBucket) { |
| LOGGER.error("Unable to delete bucket directory: " + bucketDir.getAbsolutePath()); |
| } |
| } |
| } |
| } |
| } |
| |
| private File getBundleFile(final BundleVersionCoordinate coordinate) { |
| final File bundleVersionDir = getBundleVersionDirectory(bundleStorageDir, coordinate); |
| return getBundleFile(bundleVersionDir, coordinate); |
| } |
| |
| static File getBundleDirectory(final File bundleStorageDir, final BundleCoordinate bundleCoordinate) { |
| final String bucketId = bundleCoordinate.getBucketId(); |
| final String groupId = bundleCoordinate.getGroupId(); |
| final String artifactId = bundleCoordinate.getArtifactId(); |
| |
| return new File(bundleStorageDir, sanitize(bucketId) + "/" + sanitize(groupId) + "/" + sanitize(artifactId)); |
| } |
| |
| static File getBundleVersionDirectory(final File bundleStorageDir, final BundleVersionCoordinate versionCoordinate) { |
| final String bucketId = versionCoordinate.getBucketId(); |
| final String groupId = versionCoordinate.getGroupId(); |
| final String artifactId = versionCoordinate.getArtifactId(); |
| final String version = versionCoordinate.getVersion(); |
| |
| return new File(bundleStorageDir, sanitize(bucketId) + "/" + sanitize(groupId) + "/" + sanitize(artifactId) + "/" + sanitize(version)); |
| } |
| |
| static File getBundleFile(final File parentDir, final BundleVersionCoordinate versionCoordinate) { |
| final String artifactId = versionCoordinate.getArtifactId(); |
| final String version = versionCoordinate.getVersion(); |
| final BundleVersionType bundleType = versionCoordinate.getType(); |
| |
| |
| final String bundleFileExtension = getBundleFileExtension(bundleType); |
| final String bundleFilename = sanitize(artifactId) + "-" + sanitize(version) + bundleFileExtension; |
| return new File(parentDir, bundleFilename); |
| } |
| |
| static String sanitize(final String input) { |
| return FileUtils.sanitizeFilename(input).trim().toLowerCase(); |
| } |
| |
| static String getBundleFileExtension(final BundleVersionType bundleType) { |
| switch (bundleType) { |
| case NIFI_NAR: |
| return NAR_EXTENSION; |
| case MINIFI_CPP: |
| return CPP_EXTENSION; |
| default: |
| LOGGER.warn("Unknown bundle type: " + bundleType); |
| return ""; |
| } |
| } |
| |
| } |