| /* |
| * 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.ignite.spi.deployment.uri; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import org.apache.ignite.compute.ComputeTask; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.spi.IgniteSpiException; |
| |
| /** |
| * Helper that loads classes either from directory or from JAR file. |
| * <p> |
| * If loading from directory is used, helper scans given directory |
| * and all subdirectories recursively and loads all files |
| * with ".class" extension by given class loader. If class could not |
| * be loaded it will be ignored. |
| * <p> |
| * If JAR file loading is used helper scans JAR file and tries to |
| * load all {@link JarEntry} assuming it's a file name. |
| * If at least one of them could not be loaded helper fails. |
| */ |
| final class GridUriDeploymentDiscovery { |
| /** |
| * Enforces singleton. |
| */ |
| private GridUriDeploymentDiscovery() { |
| // No-op. |
| } |
| |
| /** |
| * Load classes from given file. File could be either directory or JAR file. |
| * |
| * @param clsLdr Class loader to load files. |
| * @param file Either directory or JAR file which contains classes or |
| * references to them. |
| * @return Set of found and loaded classes or empty set if file does not |
| * exist. |
| * @throws org.apache.ignite.spi.IgniteSpiException Thrown if given JAR file references to none |
| * existed class or IOException occurred during processing. |
| */ |
| static Set<Class<? extends ComputeTask<?, ?>>> getClasses(ClassLoader clsLdr, File file) |
| throws IgniteSpiException { |
| Set<Class<? extends ComputeTask<?, ?>>> rsrcs = new HashSet<>(); |
| |
| if (!file.exists()) |
| return rsrcs; |
| |
| GridUriDeploymentFileResourceLoader fileRsrcLdr = new GridUriDeploymentFileResourceLoader(clsLdr, file); |
| |
| if (file.isDirectory()) |
| findResourcesInDirectory(fileRsrcLdr, file, rsrcs); |
| else { |
| try { |
| for (JarEntry entry : U.asIterable(new JarFile(file.getAbsolutePath()).entries())) { |
| Class<? extends ComputeTask<?, ?>> rsrc = fileRsrcLdr.createResource(entry.getName(), false); |
| |
| if (rsrc != null) |
| rsrcs.add(rsrc); |
| } |
| } |
| catch (IOException e) { |
| throw new IgniteSpiException("Failed to discover classes in file: " + file.getAbsolutePath(), e); |
| } |
| } |
| |
| return rsrcs; |
| } |
| |
| /** |
| * Recursively scans given directory and load all found files by loader. |
| * |
| * @param clsLdr Loader that could load class from given file. |
| * @param dir Directory which should be scanned. |
| * @param rsrcs Set which will be filled in. |
| */ |
| private static void findResourcesInDirectory(GridUriDeploymentFileResourceLoader clsLdr, File dir, |
| Set<Class<? extends ComputeTask<?, ?>>> rsrcs) { |
| assert dir.isDirectory(); |
| |
| for (File file : dir.listFiles()) { |
| if (file.isDirectory()) { |
| // Recurse down into directories. |
| findResourcesInDirectory(clsLdr, file, rsrcs); |
| } |
| else { |
| Class<? extends ComputeTask<?, ?>> rsrc = null; |
| |
| try { |
| rsrc = clsLdr.createResource(file.getAbsolutePath(), true); |
| } |
| catch (IgniteSpiException e) { |
| // Must never happen because we use 'ignoreUnknownRsrc=true'. |
| assert false; |
| } |
| |
| if (rsrc != null) |
| rsrcs.add(rsrc); |
| } |
| } |
| } |
| } |