com.alipay.sofa.ark.support.startup.SofaArkBootstrap Maven / Gradle / Ivy

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/*
 * 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.alipay.sofa.ark.support.startup;

import com.alipay.sofa.ark.bootstrap.ClasspathLauncher;
import com.alipay.sofa.ark.bootstrap.ClasspathLauncher.ClassPathArchive;
import com.alipay.sofa.ark.common.util.AssertUtils;
import com.alipay.sofa.ark.common.util.ClassLoaderUtils;
import com.alipay.sofa.ark.spi.argument.CommandArgument;
import com.alipay.sofa.ark.support.thread.IsolatedThreadGroup;
import com.alipay.sofa.ark.support.thread.LaunchRunner;

import java.net.URL;
import java.net.URLClassLoader;

/**
 * relaunch a started main method with bootstrapping ark container
 * {@literal org.springframework.boot.maven.RunMojo}
 *
 * @author qilong.zql
 * @author Phillip Webb
 * @since 0.1.0
 */
public class SofaArkBootstrap {

    private static final String BIZ_CLASSLOADER = "com.alipay.sofa.ark.container.service.classloader.BizClassLoader";
    private static final String MAIN_ENTRY_NAME = "remain";
    private static EntryMethod  entryMethod;

    public static void launch(String[] args) {
        try {
            if (!isSofaArkStarted()) {
                entryMethod = new EntryMethod(Thread.currentThread());
                IsolatedThreadGroup threadGroup = new IsolatedThreadGroup(
                    entryMethod.getDeclaringClassName());
                LaunchRunner launchRunner = new LaunchRunner(SofaArkBootstrap.class.getName(),
                    MAIN_ENTRY_NAME, args);
                Thread launchThread = new Thread(threadGroup, launchRunner,
                    entryMethod.getMethodName());
                launchThread.start();
                LaunchRunner.join(threadGroup);
                threadGroup.rethrowUncaughtException();
                System.exit(0);
            }
        } catch (Throwable e) {
            throw new RuntimeException(e);
        }
    }

    public static Object prepareContainerForTest(Class testClass) {
        try {
            URL[] urls = getURLClassPath();
            return new ClasspathLauncher(new ClassPathArchive(testClass.getCanonicalName(), null,
                urls)).launch(getClasspath(urls), testClass);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private static void remain(String[] args) throws Exception {// NOPMD
        AssertUtils.assertNotNull(entryMethod, "No Entry Method Found.");
        URL[] urls = getURLClassPath();
        new ClasspathLauncher(new ClassPathArchive(entryMethod.getDeclaringClassName(),
            entryMethod.getMethodName(), urls)).launch(args, getClasspath(urls),
            entryMethod.getMethod());
    }

    private static String getClasspath(URL[] urls) {
        StringBuilder sb = new StringBuilder();
        for (URL url : urls) {
            sb.append(url.toExternalForm()).append(CommandArgument.CLASSPATH_SPLIT);
        }
        return sb.toString();
    }

    private static URL[] getURLClassPath() {
        ClassLoader classLoader = ClassLoader.getSystemClassLoader();
        //        return ((URLClassLoader) classLoader).getURLs();
        return ClassLoaderUtils.getURLs(classLoader);
    }

    private static boolean isSofaArkStarted() {
        Class bizClassLoader = SofaArkBootstrap.class.getClassLoader().getClass();
        return BIZ_CLASSLOADER.equals(bizClassLoader.getCanonicalName());
    }
}