| /* |
| * 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.flink.statefun.flink.core.spi; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.Serializable; |
| import java.net.URI; |
| import java.util.*; |
| import org.apache.flink.statefun.flink.core.spi.ModuleSpecs.ModuleSpec; |
| |
| public class ModuleSpecs implements Iterable<ModuleSpec>, Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| private final List<ModuleSpec> specs; |
| |
| private ModuleSpecs(List<ModuleSpec> specs) { |
| this.specs = Objects.requireNonNull(specs); |
| } |
| |
| public static ModuleSpecs fromPath(String rootDirectory) throws IOException { |
| Objects.requireNonNull(rootDirectory); |
| |
| List<ModuleSpec> loadableModules = discoverLoadableArtifacts(rootDirectory); |
| return new ModuleSpecs(loadableModules); |
| } |
| |
| public static ModuleSpecs fromCollection(ModuleSpec... moduleSpecs) { |
| List<ModuleSpec> loadableModules = Arrays.asList(moduleSpecs); |
| return new ModuleSpecs(loadableModules); |
| } |
| |
| /** Scans the given directory and looks for a List of artifacts ( */ |
| private static List<ModuleSpec> discoverLoadableArtifacts(String rootDirectory) |
| throws IOException { |
| File parent = new File(rootDirectory); |
| if (!parent.exists()) { |
| throw new IllegalArgumentException(rootDirectory + " does not exists."); |
| } |
| if (!parent.isDirectory()) { |
| throw new RuntimeException(rootDirectory + " is not a directory."); |
| } |
| List<ModuleSpec> loadableFunctions = new ArrayList<>(); |
| for (File subDirectory : nullToEmpty(parent.listFiles())) { |
| if (subDirectory.isDirectory()) { |
| ModuleSpec loadableFunction = findLoadableModuleArtifacts(subDirectory.getAbsoluteFile()); |
| loadableFunctions.add(loadableFunction); |
| } |
| } |
| return loadableFunctions; |
| } |
| |
| private static ModuleSpec findLoadableModuleArtifacts(File subDirectory) throws IOException { |
| ModuleSpec.Builder builder = ModuleSpec.builder(); |
| |
| for (File file : nullToEmpty(subDirectory.listFiles())) { |
| if (!file.isFile()) { |
| continue; |
| } |
| if (file.getName().endsWith(".jar")) { |
| builder.withJarFile(file.getAbsoluteFile()); |
| } else if (file.getName().equals(Constants.STATEFUL_FUNCTIONS_MODULE_NAME)) { |
| // for module YAMLs we have to add the entire module directory as a |
| // URL path. ClassLoader#findResource("module.yaml"). |
| builder.withYamlModuleFile(subDirectory.getAbsoluteFile()); |
| } |
| } |
| return builder.build(); |
| } |
| |
| private static File[] nullToEmpty(File[] elements) { |
| return elements == null ? new File[0] : elements; |
| } |
| |
| public List<ModuleSpec> modules() { |
| return specs; |
| } |
| |
| @Override |
| public Iterator<ModuleSpec> iterator() { |
| return specs.iterator(); |
| } |
| |
| public static final class ModuleSpec implements Serializable { |
| |
| private static final long serialVersionUID = 1; |
| private final List<URI> artifactUrls; |
| |
| private ModuleSpec(List<URI> artifacts) { |
| this.artifactUrls = Collections.unmodifiableList(artifacts); |
| } |
| |
| static Builder builder() { |
| return new Builder(); |
| } |
| |
| public List<URI> artifactUris() { |
| return artifactUrls; |
| } |
| |
| static final class Builder { |
| private final TreeSet<URI> artifacts = new TreeSet<>(); |
| |
| Builder withYamlModuleFile(File file) throws IOException { |
| Objects.requireNonNull(file); |
| artifacts.add(file.getCanonicalFile().toURI()); |
| return this; |
| } |
| |
| Builder withJarFile(File file) throws IOException { |
| Objects.requireNonNull(file); |
| artifacts.add(file.getCanonicalFile().toURI()); |
| return this; |
| } |
| |
| Builder withUri(URI uri) { |
| Objects.requireNonNull(uri); |
| artifacts.add(uri); |
| return this; |
| } |
| |
| ModuleSpec build() { |
| List<URI> sortedCopy = new ArrayList<>(artifacts); |
| return new ModuleSpec(sortedCopy); |
| } |
| } |
| } |
| } |