com.scurrilous.circe.utils.NativeUtils Maven / Gradle / Ivy
/*
* 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 com.scurrilous.circe.utils;
import static org.apache.pulsar.shade.com.google.common.base.Preconditions.checkArgument;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Locale;
/**
* Utils for loading native checksum library.
*/
public class NativeUtils {
public static final String OS_NAME = System.getProperty("os.name").toLowerCase(Locale.US);
/**
* loads given library from the this jar. ie: this jar contains: /lib/pulsar-checksum.jnilib
*
* @param path
* : absolute path of the library in the jar
* if this jar contains: /lib/pulsar-checksum.jnilib then provide the same absolute path as input
* @throws Exception
*/
public static void loadLibraryFromJar(String path) throws Exception {
checkArgument(path.startsWith("/"), "absolute path must start with /");
String[] parts = path.split("/");
String filename = (parts.length > 0) ? parts[parts.length - 1] : null;
Path dir = Files.createTempDirectory("native");
dir.toFile().deleteOnExit();
File temp = new File(dir.toString(), filename);
temp.deleteOnExit();
byte[] buffer = new byte[1024];
int read;
InputStream input = NativeUtils.class.getResourceAsStream(path);
if (input == null) {
throw new FileNotFoundException("Couldn't find file into jar " + path);
}
try {
OutputStream out = new FileOutputStream(temp);
try {
while ((read = input.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
} finally {
out.close();
}
} finally {
input.close();
}
if (!temp.exists()) {
throw new FileNotFoundException("Failed to copy file from jar at " + temp.getAbsolutePath());
}
System.load(temp.getAbsolutePath());
}
/**
* Returns jni library extension based on OS specification. Maven-nar generates jni library based on different OS :
* http://mark.donszelmann.org/maven-nar-plugin/aol.html (jni.extension)
*
* @return
*/
public static String libType() {
if (OS_NAME.indexOf("mac") >= 0) {
return "jnilib";
} else if (OS_NAME.indexOf("nix") >= 0 || OS_NAME.indexOf("nux") >= 0 || OS_NAME.indexOf("aix") > 0) {
return "so";
} else if (OS_NAME.indexOf("win") >= 0) {
return "dll";
}
throw new TypeNotPresentException(OS_NAME + " not supported", null);
}
}