66ea26b1bc
Splits jvpp into two jars jvpp-registry.jar - base jvpp functionality jvpp-core.jar - Java wrapper for vpe.api Plugins can be generated the same way jvpp-core.jar is. Example (nsh): https://gerrit.fd.io/r/#/c/2118/ Change-Id: I2254f90b2c3e423563bb91bf70877979f1e90a7d Signed-off-by: Marek Gradzki <mgradzki@cisco.com>
74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
/*
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* Copyright (c) 2016 Cisco and/or its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openvpp.jvpp;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.StandardCopyOption;
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import java.nio.file.attribute.PosixFilePermission;
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import java.nio.file.attribute.PosixFilePermissions;
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import java.util.Set;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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* Utility class for loading JNI libraries.
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*/
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public final class NativeLibraryLoader {
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private static final Logger LOG = Logger.getLogger(NativeLibraryLoader.class.getName());
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private NativeLibraryLoader() {
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throw new UnsupportedOperationException("This utility class cannot be instantiated.");
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}
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/**
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* Loads JNI library using class loader of the given class.
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*
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* @param libName name of the library to be loaded
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*/
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public static void loadLibrary(final String libName, final Class clazz) throws IOException {
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java.util.Objects.requireNonNull(libName, "libName should not be null");
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java.util.Objects.requireNonNull(clazz, "clazz should not be null");
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try (final InputStream is = clazz.getResourceAsStream('/' + libName)) {
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if (is == null) {
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throw new IOException("Failed to open library resource " + libName);
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}
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loadStream(libName, is);
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}
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}
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private static void loadStream(final String libName, final InputStream is) throws IOException {
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final Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxr-x---");
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final Path p = Files.createTempFile(libName, null, PosixFilePermissions.asFileAttribute(perms));
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try {
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Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING);
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Runtime.getRuntime().load(p.toString());
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} catch (Exception e) {
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throw new IOException("Failed to load library " + p, e);
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} finally {
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try {
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Files.deleteIfExists(p);
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} catch (IOException e) {
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LOG.log(Level.WARNING, String.format("Failed to delete temporary file %s.", p), e);
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}
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}
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}
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}
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