raw.compiler.jvm.RawMutableURLClassLoader.scala Maven / Gradle / Ivy

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/*
 * Copyright 2023 RAW Labs S.A.
 *
 * Use of this software is governed by the Business Source License
 * included in the file licenses/BSL.txt.
 *
 * As of the Change Date specified in that file, in accordance with
 * the Business Source License, use of this software will be governed
 * by the Apache License, Version 2.0, included in the file
 * licenses/APL.txt.
 */

package raw.compiler.jvm

import com.typesafe.scalalogging.StrictLogging

import java.net.{URL, URLClassLoader}

/**
 * Used to load the classes generated by the query compiler. It is important to use the same
 * classloader whenever the query classes are loaded, which includes in the ExecutionServer class
 * and in the Spark executors. Therefore, the same instance of RawMutableURLClassLoader should be
 * used as a parent to the classloader that Spark creates internally (by setting it as
 * Thread.contextClassloader) and by the execution server.
 */
class RawMutableURLClassLoader(parent: ClassLoader, urls: Array[URL] = new Array(0))
    extends URLClassLoader(urls, parent)
    with StrictLogging {

  override def addURL(url: URL): Unit = {
    logger.debug("Adding URL: " + url)
    super.addURL(url)
  }
}