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Instrumentation of Java libraries using OpenTelemetry.

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.bootstrap;

import java.lang.instrument.ClassFileTransformer;

/**
 * Holder for {@link ClassFileTransformer} used by the instrumentation. Calling transform on this
 * class file transformer processes given bytes the same way as they would be processed during
 * loading of the class.
 */
public final class ClassFileTransformerHolder {

  private static volatile ClassFileTransformer classFileTransformer;

  public static ClassFileTransformer getClassFileTransformer() {
    return classFileTransformer;
  }

  public static void setClassFileTransformer(ClassFileTransformer transformer) {
    classFileTransformer = transformer;
  }

  private ClassFileTransformerHolder() {}
}