org.springframework.boot.cli.SpringCli Maven / Gradle / Ivy
/*
* Copyright 2012-2019 the original author or authors.
*
* 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
*
* https://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.springframework.boot.cli;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
import org.springframework.boot.cli.command.CommandFactory;
import org.springframework.boot.cli.command.CommandRunner;
import org.springframework.boot.cli.command.core.HelpCommand;
import org.springframework.boot.cli.command.core.HintCommand;
import org.springframework.boot.cli.command.core.VersionCommand;
import org.springframework.boot.cli.command.shell.ShellCommand;
import org.springframework.boot.loader.tools.LogbackInitializer;
import org.springframework.util.ClassUtils;
import org.springframework.util.SystemPropertyUtils;
/**
* Spring Command Line Interface. This is the main entry-point for the Spring command line
* application.
*
* @author Phillip Webb
* @see #main(String...)
* @see CommandRunner
*/
public final class SpringCli {
private SpringCli() {
}
public static void main(String... args) {
System.setProperty("java.awt.headless", Boolean.toString(true));
LogbackInitializer.initialize();
CommandRunner runner = new CommandRunner("spring");
ClassUtils.overrideThreadContextClassLoader(createExtendedClassLoader(runner));
runner.addCommand(new HelpCommand(runner));
addServiceLoaderCommands(runner);
runner.addCommand(new ShellCommand());
runner.addCommand(new HintCommand(runner));
runner.setOptionCommands(HelpCommand.class, VersionCommand.class);
runner.setHiddenCommands(HintCommand.class);
int exitCode = runner.runAndHandleErrors(args);
if (exitCode != 0) {
// If successful, leave it to run in case it's a server app
System.exit(exitCode);
}
}
private static void addServiceLoaderCommands(CommandRunner runner) {
ServiceLoader factories = ServiceLoader.load(CommandFactory.class);
for (CommandFactory factory : factories) {
runner.addCommands(factory.getCommands());
}
}
private static URLClassLoader createExtendedClassLoader(CommandRunner runner) {
return new URLClassLoader(getExtensionURLs(), runner.getClass().getClassLoader());
}
private static URL[] getExtensionURLs() {
List urls = new ArrayList<>();
String home = SystemPropertyUtils.resolvePlaceholders("${spring.home:${SPRING_HOME:.}}");
File extDirectory = new File(new File(home, "lib"), "ext");
if (extDirectory.isDirectory()) {
for (File file : extDirectory.listFiles()) {
if (file.getName().endsWith(".jar")) {
try {
urls.add(file.toURI().toURL());
}
catch (MalformedURLException ex) {
throw new IllegalStateException(ex);
}
}
}
}
return urls.toArray(new URL[0]);
}
}