io.undertow.examples.Runner Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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
*
* 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 io.undertow.examples;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.xnio.IoUtils;
/**
* Simple utility to make it easy to run the examples
*
* @author Stuart Douglas
*/
public class Runner {
private static final String TARGET_CLASS = "target" + File.separatorChar + "classes" + File.separatorChar;
public static void main(final String[] args) {
System.setProperty("java.util.logging.manager", "org.jboss.logmanager.LogManager");
URL url = Runner.class.getClassLoader().getResource(Runner.class.getPackage().getName().replace(".", "/"));
if (url == null) {
throw new RuntimeException("Could not locate examples package");
}
final Map examples = new HashMap<>();
//hackz to discover all the example classes on the class path
ZipInputStream in = null;
boolean fromJarFile = false;
try {
String finalURIString = url.toString();
if(url.getPath().contains("!")) {
fromJarFile = true;
finalURIString = url.getPath().substring(0, url.getPath().indexOf("!"));
}
if(fromJarFile) {
String zipPath = finalURIString.replace("file:", "");
in = new ZipInputStream(new FileInputStream(zipPath));
ZipEntry entry = in.getNextEntry();
while (entry != null) {
if (entry.getName().endsWith(".class")) {
String className = entry.getName().substring(0, entry.getName().length() - 6).replace("/", ".");
try {
Class clazz = Class.forName(className);
UndertowExample example = clazz.getAnnotation(UndertowExample.class);
if (example != null) {
examples.put(example.value(), clazz);
}
} catch (Throwable e) {
//ignore
}
}
entry = in.getNextEntry();
}
}else {
try {
try (Stream paths = Files.walk(Paths.get(url.toURI()))) {
Map> annotationMapping = paths
.filter(Files::isRegularFile)
.filter(path -> path.toFile().getName().endsWith(".class"))
.map(Runner::toFileName)
.map(fileName -> fileName.replace(File.separator, "."))
.map(Runner::instance)
.filter(Optional::isPresent)
.filter(clazz -> clazz.get().getAnnotation(UndertowExample.class) != null)
.collect(Collectors.toMap(clazz -> clazz.get().getAnnotation(UndertowExample.class).value(), Optional::get));
examples.putAll(annotationMapping);
}
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
final List names = new ArrayList<>(examples.keySet());
Collections.sort(names);
System.out.println("Welcome to the Undertow Examples");
System.out.println("Please select an example:");
for (int i = 0; i < names.size(); ++i) {
System.out.print((char) ('a' + i));
System.out.println(") " + names.get(i));
}
byte[] data = new byte[1];
System.in.read(data);
String example = names.get(data[0] - 'a');
System.out.println("Running example " + example);
Class exampleClass = examples.get(example);
UndertowExample annotation = (UndertowExample) exampleClass.getAnnotation(UndertowExample.class);
System.out.println("Please point your web browser at " + annotation.location());
final Method main = exampleClass.getDeclaredMethod("main", String[].class);
main.invoke(null, (Object)args);
} catch (IOException | NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
throw new RuntimeException(e);
} finally {
IoUtils.safeClose(in);
}
}
private static String toFileName(Path path) {
String pathName = path.toFile().getAbsolutePath();
int index = pathName.indexOf(TARGET_CLASS) + TARGET_CLASS.length();
int classIndex = pathName.lastIndexOf(".class");
return pathName.substring(index, classIndex);
}
private static Optional> instance(String clazz) {
try {
return Optional.ofNullable(Class.forName(clazz));
} catch (ClassNotFoundException e) {
return Optional.empty();
}
}
}