content: /*
   * 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 org.apache.activemq.artemis.tests.compatibility.base;
  
  import java.io.File;
  import java.lang.invoke.MethodHandles;
  import java.lang.reflect.Method;
  import java.net.URL;
  import java.nio.file.Files;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.activemq.artemis.tests.compatibility.GroovyRun;
  import org.apache.activemq.artemis.tests.extensions.LogTestNameExtension;
  import org.apache.activemq.artemis.tests.extensions.TargetTempDirFactory;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.junit.jupiter.api.io.TempDir;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.apache.activemq.artemis.tests.compatibility.GroovyRun.SNAPSHOT;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @ExtendWith(LogTestNameExtension.class)
  public class ClasspathBase {
  
     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
     @AfterAll
     public static void cleanup() throws Exception {
        loaderMap.values().forEach((ClasspathBase::clearClassLoader));
        clearClassLoader(VersionedBase.class.getClassLoader());
        loaderMap.clear();
     }
  
     public static void clearClassLoader(ClassLoader loader) {
        try {
           execute(loader, "org.apache.activemq.artemis.api.core.client.ActiveMQClient.clearThreadPools()");
        } catch (Throwable e) {
           logger.debug(e.getMessage(), e);
        }
  
        try {
           execute(loader, "org.hornetq.core.client.impl.ServerLocatorImpl.clearThreadPools()");
        } catch (Throwable e) {
           logger.debug(e.getMessage(), e);
        }
  
        clearGroovy(loader);
     }
  
     // Temp folder at ./target/tmp/<TestClassName>/<generated>
     @TempDir(factory = TargetTempDirFactory.class)
     public static File serverFolder;
  
     private static int javaVersion;
  
     public static final int getJavaVersion() {
        return javaVersion;
     }
  
     // defining java version
     static {
        String version = System.getProperty("java.version");
        if (version.startsWith("1.")) {
           version = version.substring(2, 3);
        } else {
           int dot = version.indexOf(".");
           if (dot != -1) {
              version = version.substring(0, dot);
           }
  
           int dashIndex = version.indexOf("-");
           if (dashIndex != -1) {
              version = version.substring(0, dashIndex);
           }
        }
        javaVersion = Integer.parseInt(version);
     }
  
     protected static Map<String, ClassLoader> loaderMap = new HashMap<>();
  
     protected ClassLoader defineClassLoader(String classPath) throws Exception {
        String[] classPathArray = classPath.split(File.pathSeparator);
        URL[] elements = new URL[classPathArray.length];
        for (int i = 0; i < classPathArray.length; i++) {
           elements[i] = new File(classPathArray[i]).toPath().toUri().toURL();
        }
  
        ClassLoader parent = ClassLoader.getPlatformClassLoader();
        return new TestClassLoader(elements, parent);
     }
  
     protected static void startServer(File folder,
                                       ClassLoader loader,
                                       String serverName,
                                       String globalMaxSize,
                                       boolean setAddressSettings,
                                       String scriptToUse,
                                       String server,
                                       String sender,
                                       String receiver) throws Exception {
        setVariable(loader, "setAddressSettings", setAddressSettings);
        evaluate(loader, scriptToUse, folder.getAbsolutePath(), serverName, server, sender, receiver, globalMaxSize);
     }
  
     public static void stopServer(ClassLoader loader) throws Throwable {
        execute(loader, "server.stop()");
     }
  
     protected ClassLoader getClasspath(String name) throws Exception {
        return getClasspath(name, false);
     }
  
     protected ClassLoader getClasspath(String name, boolean forceNew) throws Exception {
  
        if (!forceNew) {
           if (name.equals(SNAPSHOT)) {
              GroovyRun.clear();
              return VersionedBase.class.getClassLoader();
           }
  
           ClassLoader loader = loaderMap.get(name);
           if (loader != null && !forceNew) {
              clearGroovy(loader);
              return loader;
           }
        }
  
        String classPathValue = null;
        File file = new File("./target/" + name + ".cp");
        if (file.exists()) {
           StringBuilder sb = new StringBuilder();
           Files.lines(file.toPath()).forEach((str) -> sb.append(str));
           classPathValue = sb.toString();
        }
  
        assertTrue(classPathValue != null && !classPathValue.trim().isEmpty(), "Cannot run compatibility tests, no classpath found on ./target/" + name + ".cp");
  
        ClassLoader loader = defineClassLoader(classPathValue);
        if (!forceNew) {
           // if we are forcing a new one, there's no point in caching it
           loaderMap.put(name, loader);
        }
  
        return loader;
     }
  
     protected static Object evaluate(ClassLoader loader, String script, String... arguments) throws Exception {
        return tclCall(loader, () -> {
           Class clazz = loader.loadClass(GroovyRun.class.getName());
           Method method = clazz.getMethod("evaluate", String.class, String[].class);
           return method.invoke(null, script, arguments);
        });
     }
  
     protected static void setVariable(ClassLoader loader, String name, Object object) throws Exception {
        tclCall(loader, () -> {
           Class clazz = loader.loadClass(GroovyRun.class.getName());
           Method method = clazz.getMethod("setVariable", String.class, Object.class);
           method.invoke(null, name, object);
           return null;
        });
     }
  
     protected static void clearGroovy(ClassLoader loader) {
        try {
           tclCall(loader, () -> {
              Class clazz = loader.loadClass(GroovyRun.class.getName());
              Method method = clazz.getMethod("clear");
              method.invoke(null);
              return null;
           });
        } catch (Throwable e) {
           logger.warn(e.getMessage(), e);
        }
     }
  
     protected static Object setVariable(ClassLoader loader, String name) throws Exception {
        return tclCall(loader, () -> {
           Class clazz = loader.loadClass(GroovyRun.class.getName());
           Method method = clazz.getMethod("getVariable", String.class);
           return method.invoke(null, name);
        });
     }
  
     protected static Object execute(ClassLoader loader, String script) throws Exception {
        return tclCall(loader, () -> {
           Class clazz = loader.loadClass(GroovyRun.class.getName());
           Method method = clazz.getMethod("execute", String.class);
           return method.invoke(null, script);
        });
     }
  
     protected static Object tclCall(ClassLoader loader, CallIt run) throws Exception {
  
        ClassLoader original = Thread.currentThread().getContextClassLoader();
        Thread.currentThread().setContextClassLoader(loader);
        try {
           return run.run();
        } finally {
           Thread.currentThread().setContextClassLoader(original);
        }
     }
  
     public interface CallIt {
  
        Object run() throws Exception;
     }
  
  }
  