kanela.agent.attacher.io.Tools Maven / Gradle / Ivy

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/*
 * =========================================================================================
 * Copyright © 2013-2018 the kamon project 
 *
 * Licensed 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 kanela.agent.attacher.io;


import lombok.Value;
import lombok.val;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.management.ManagementFactory;

/**
 * Various IO tools.
 */
@Value
public class Tools {
    /**
     * Gets the current JVM PID.
     *
     * @return Returns the PID.
     */
    public static String getCurrentPID() {
        val jvm = ManagementFactory.getRuntimeMXBean().getName();
        return jvm.substring(0, jvm.indexOf('@'));
    }

    public static String unqualify(Class clazz) {
        return clazz.getName().replace('.', '/') + ".class";
    }

    public static byte[] getBytesFromStream(InputStream stream) throws IOException {
        val buffer = new ByteArrayOutputStream();
        int nRead;
        byte[] data = new byte[65536];
        while ((nRead = stream.read(data, 0, data.length)) != -1) {
            buffer.write(data, 0, nRead);
        }
        buffer.flush();
        return buffer.toByteArray();
    }
}