| /* |
| * 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.Bundle; |
| import org.apache.nifi.bundle.BundleCoordinate; |
| import org.apache.nifi.bundle.BundleDetails; |
| import org.apache.nifi.util.NiFiProperties; |
| import org.apache.nifi.util.StringUtils; |
| |
| import java.io.File; |
| |
| /** |
| * Utility to create the system bundle. |
| */ |
| public final class SystemBundle { |
| |
| public static final BundleCoordinate SYSTEM_BUNDLE_COORDINATE = new BundleCoordinate( |
| BundleCoordinate.DEFAULT_GROUP, "system", BundleCoordinate.DEFAULT_VERSION); |
| |
| /** |
| * Returns a bundle representing the system class loader. |
| * |
| * @param niFiProperties a NiFiProperties instance which will be used to obtain the default NAR library path, |
| * which will become the working directory of the returned bundle |
| * @return a bundle for the system class loader |
| */ |
| public static Bundle create(final NiFiProperties niFiProperties) { |
| final ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader(); |
| |
| final String narLibraryDirectory = niFiProperties.getProperty(NiFiProperties.NAR_LIBRARY_DIRECTORY); |
| if (StringUtils.isBlank(narLibraryDirectory)) { |
| throw new IllegalStateException("Unable to create system bundle because " + NiFiProperties.NAR_LIBRARY_DIRECTORY + " was null or empty"); |
| } |
| |
| final BundleDetails systemBundleDetails = new BundleDetails.Builder() |
| .workingDir(new File(narLibraryDirectory)) |
| .coordinate(SYSTEM_BUNDLE_COORDINATE) |
| .build(); |
| |
| return new Bundle(systemBundleDetails, systemClassLoader); |
| } |
| } |