| /* |
| * 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * Each processor, controller service, and reporting task will have an InstanceClassLoader. |
| * |
| * The InstanceClassLoader will either be an empty pass-through to the NARClassLoader, or will contain a |
| * copy of all the NAR's resources in the case of components that @RequireInstanceClassLoading. |
| */ |
| public class InstanceClassLoader extends AbstractNativeLibHandlingClassLoader { |
| |
| private static final Logger logger = LoggerFactory.getLogger(InstanceClassLoader.class); |
| |
| private final String identifier; |
| private final String instanceType; |
| |
| private final Set<URL> instanceUrls; |
| private final Set<URL> additionalResourceUrls; |
| |
| /** |
| * @param identifier the id of the component this ClassLoader was created for |
| * @param instanceUrls the urls for the instance, will either be empty or a copy of the NARs urls |
| * @param additionalResourceUrls the urls that came from runtime properties of the component |
| * @param parent the parent ClassLoader |
| */ |
| public InstanceClassLoader(final String identifier, final String type, final Set<URL> instanceUrls, final Set<URL> additionalResourceUrls, final ClassLoader parent) { |
| this(identifier, type, instanceUrls, additionalResourceUrls, Collections.emptySet(), parent); |
| } |
| |
| public InstanceClassLoader( |
| final String identifier, |
| final String type, |
| final Set<URL> instanceUrls, |
| final Set<URL> additionalResourceUrls, |
| final Set<File> narNativeLibDirs, |
| final ClassLoader parent |
| ) { |
| super(combineURLs(instanceUrls, additionalResourceUrls), parent, initNativeLibDirList(narNativeLibDirs, additionalResourceUrls), identifier); |
| this.identifier = identifier; |
| this.instanceType = type; |
| this.instanceUrls = Collections.unmodifiableSet( |
| instanceUrls == null ? Collections.emptySet() : new LinkedHashSet<>(instanceUrls)); |
| this.additionalResourceUrls = Collections.unmodifiableSet( |
| additionalResourceUrls == null ? Collections.emptySet() : new LinkedHashSet<>(additionalResourceUrls)); |
| } |
| |
| /** |
| * Note: Normally URLClassLoader will only load resources that are inside JARs, or in directories, but many times we allow |
| * properties to specify specific files to add to the classpath. This allows those files to be found by checking the known |
| * URLs of the InstanceClassLoader, when the resource wasn't find in the parent hierarchy. |
| */ |
| @Override |
| public URL findResource(String name) { |
| URL resourceUrl = super.findResource(name); |
| |
| if (resourceUrl == null) { |
| resourceUrl = findResource(instanceUrls, name); |
| } |
| |
| if (resourceUrl == null) { |
| resourceUrl = findResource(additionalResourceUrls, name); |
| } |
| |
| return resourceUrl; |
| } |
| |
| private URL findResource(final Set<URL> urls, final String name) { |
| if (urls == null || name == null) { |
| return null; |
| } |
| |
| for (final URL url : urls) { |
| try { |
| final URI uri = url.toURI(); |
| final File file = new File(uri); |
| if (name.equals(file.getName())) { |
| logger.debug("Found resource '" + name + "' from URL '" + url.toExternalForm() + "'"); |
| return url; |
| } |
| } catch (URISyntaxException e) { |
| logger.error(e.getMessage(), e); |
| return null; |
| } |
| } |
| |
| return null; |
| } |
| |
| private static List<File> initNativeLibDirList(Set<File> narNativeLibDirs, Set<URL> additionalResourceUrls) { |
| List<File> nativeLibDirList = new ArrayList<>(narNativeLibDirs); |
| |
| Set<File> additionalNativeLibDirs = new HashSet<>(); |
| if (additionalResourceUrls != null) { |
| for (URL url : additionalResourceUrls) { |
| File file; |
| |
| try { |
| file = new File(url.toURI()); |
| } catch (URISyntaxException e) { |
| file = new File(url.getPath()); |
| } catch (Exception e) { |
| logger.error("Couldn't convert url '" + url + "' to a file"); |
| file = null; |
| } |
| |
| File dir = toDir(file); |
| if (dir != null) { |
| additionalNativeLibDirs.add(dir); |
| } |
| } |
| } |
| |
| nativeLibDirList.addAll(additionalNativeLibDirs); |
| |
| return nativeLibDirList; |
| } |
| |
| private static URL[] combineURLs(final Set<URL> instanceUrls, final Set<URL> additionalResourceUrls) { |
| final Set<URL> allUrls = new LinkedHashSet<>(); |
| |
| if (instanceUrls != null) { |
| allUrls.addAll(instanceUrls); |
| } |
| |
| if (additionalResourceUrls != null) { |
| allUrls.addAll(additionalResourceUrls); |
| } |
| |
| return allUrls.toArray(new URL[allUrls.size()]); |
| } |
| |
| public String getIdentifier() { |
| return identifier; |
| } |
| |
| public String getInstanceType() { |
| return instanceType; |
| } |
| |
| public Set<URL> getInstanceUrls() { |
| return instanceUrls; |
| } |
| |
| public Set<URL> getAdditionalResourceUrls() { |
| return additionalResourceUrls; |
| } |
| } |