org.eclipse.jetty.ee8.quickstart.QuickStartConfiguration Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.ee8.quickstart;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.jetty.ee8.annotations.AnnotationDecorator;
import org.eclipse.jetty.ee8.webapp.AbstractConfiguration;
import org.eclipse.jetty.ee8.webapp.Configuration;
import org.eclipse.jetty.ee8.webapp.StandardDescriptorProcessor;
import org.eclipse.jetty.ee8.webapp.WebAppContext;
import org.eclipse.jetty.ee8.webapp.WebDescriptor;
import org.eclipse.jetty.ee8.webapp.WebInfConfiguration;
import org.eclipse.jetty.ee8.webapp.WebXmlConfiguration;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceFactory;
import org.eclipse.jetty.util.resource.Resources;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* QuickStartConfiguration
*
* Prepare for quickstart generation, or usage.
*/
public class QuickStartConfiguration extends AbstractConfiguration {
private static final Logger LOG = LoggerFactory.getLogger(QuickStartConfiguration.class);
public static final Set> __replacedConfigurations = new HashSet<>();
public static final String ORIGIN_ATTRIBUTE = "org.eclipse.jetty.quickstart.origin";
public static final String QUICKSTART_WEB_XML = "org.eclipse.jetty.quickstart.xml";
public static final String MODE = "org.eclipse.jetty.quickstart.mode";
private static final Mode DEFAULT_MODE = Mode.AUTO;
static {
__replacedConfigurations.add(org.eclipse.jetty.ee8.webapp.WebXmlConfiguration.class);
__replacedConfigurations.add(org.eclipse.jetty.ee8.webapp.MetaInfConfiguration.class);
__replacedConfigurations.add(org.eclipse.jetty.ee8.webapp.FragmentConfiguration.class);
__replacedConfigurations.add(org.eclipse.jetty.ee8.annotations.AnnotationConfiguration.class);
}
private ResourceFactory.Closeable _resourceFactory;
/**
* Configure the server for the quickstart mode.
* In practise this means calling server.setDryRun(true) for GENERATE mode
*
* @param server The server to configure
* @param mode The quickstart mode
* @see Server#setDryRun(boolean)
*/
public static void configureMode(Server server, String mode) {
if (mode != null && Mode.valueOf(mode) == Mode.GENERATE)
server.setDryRun(true);
}
public enum Mode {
// Generate quickstart-web.xml and then stop
GENERATE,
// use quickstart depending on the existence of quickstart-web.xml
AUTO,
// Use quickstart-web.xml
QUICKSTART
}
public QuickStartConfiguration() {
super(true);
addDependencies(WebInfConfiguration.class);
addDependents(WebXmlConfiguration.class);
}
private static Mode getModeForContext(WebAppContext context) {
Object o = context.getAttribute(MODE);
if (o instanceof Mode m)
return m;
if (o instanceof String s)
return Mode.valueOf(s);
else
return DEFAULT_MODE;
}
@Override
public void preConfigure(WebAppContext context) throws Exception {
_resourceFactory = ResourceFactory.closeable();
// check that webapp is suitable for quick start - it is not a packed war
String war = context.getWar();
if (StringUtil.isBlank(war) || !context.getBaseResource().isDirectory())
throw new IllegalStateException("Invalid Quickstart location");
// look for quickstart-web.xml in WEB-INF of webapp
Path quickStartWebXml = getQuickStartWebXml(context);
// Get the mode
Mode mode = getModeForContext(context);
if (LOG.isDebugEnabled())
LOG.debug("mode={} quickStartWebXml={} isReadableFile={} for {}", mode, quickStartWebXml, Files.isRegularFile(quickStartWebXml), context);
switch(mode) {
case GENERATE:
{
if (Files.isRegularFile(quickStartWebXml))
LOG.info("Regenerating {} for {}", quickStartWebXml, context);
else
LOG.info("Generating {} for {}", quickStartWebXml, context);
super.preConfigure(context);
// generate the quickstart file then abort
QuickStartGeneratorConfiguration generator = new QuickStartGeneratorConfiguration(true);
configure(generator, context);
context.addConfiguration(generator);
break;
}
case AUTO:
{
if (Files.isRegularFile(quickStartWebXml)) {
quickStart(context);
} else {
if (LOG.isDebugEnabled())
LOG.debug("No quickstart-web.xml found, starting webapp {} normally", context);
super.preConfigure(context);
}
break;
}
case QUICKSTART:
{
if (Files.isRegularFile(quickStartWebXml)) {
quickStart(context);
} else {
throw new IllegalStateException("No WEB-INF/quickstart-web.xml file for " + context);
}
break;
}
default:
throw new IllegalStateException("Unhandled QuickStart.Mode: " + mode);
}
}
protected void configure(QuickStartGeneratorConfiguration generator, WebAppContext context) throws IOException {
Object attr;
attr = context.getAttribute(ORIGIN_ATTRIBUTE);
if (attr != null)
generator.setOriginAttribute(attr.toString());
Path quickStartWebXml = getQuickStartWebXml(context);
generator.setQuickStartWebXml(quickStartWebXml);
}
@Override
public void configure(WebAppContext context) throws Exception {
Path quickStartWebXml = getQuickStartWebXml(context);
// Don't run configure() if quickstart-web.xml does not exist
if (!Files.isRegularFile(quickStartWebXml)) {
super.configure(context);
} else {
//add the processor to handle normal web.xml content
context.getMetaData().addDescriptorProcessor(new StandardDescriptorProcessor());
//add a processor to handle extended web.xml format
QuickStartDescriptorProcessor quickStartDescriptorProcessor = new QuickStartDescriptorProcessor();
context.getMetaData().addDescriptorProcessor(quickStartDescriptorProcessor);
context.setAttribute(QuickStartDescriptorProcessor.class.getName(), quickStartDescriptorProcessor);
//add a decorator that will find introspectable annotations
//this must be the last Decorator because they are run in reverse order!
context.getObjectFactory().addDecorator(new AnnotationDecorator(context));
if (LOG.isDebugEnabled())
LOG.debug("configured {}", this);
}
}
@Override
public void postConfigure(WebAppContext context) throws Exception {
super.postConfigure(context);
}
@Override
public void deconfigure(WebAppContext context) throws Exception {
super.deconfigure(context);
QuickStartDescriptorProcessor quickStartDescriptorProcessor = (QuickStartDescriptorProcessor) context.getAttribute(QuickStartDescriptorProcessor.class.getName());
IO.close(quickStartDescriptorProcessor);
IO.close(_resourceFactory);
_resourceFactory = null;
}
protected void quickStart(WebAppContext context) throws Exception {
if (LOG.isDebugEnabled())
LOG.info("Quickstarting {}", context);
context.setConfigurations(context.getConfigurations().stream().filter(c -> !__replacedConfigurations.contains(c.replaces())).filter(c -> !__replacedConfigurations.contains(c.getClass())).toArray(Configuration[]::new));
Path quickStartWebXml = getQuickStartWebXml(context);
if (!Files.isRegularFile(quickStartWebXml))
throw new IllegalStateException("Quickstart doesn't exist: " + quickStartWebXml);
Resource quickStartWebResource = context.getResourceFactory().newResource(quickStartWebXml);
context.getMetaData().setWebDescriptor(new WebDescriptor(quickStartWebResource));
context.getServletContext().setEffectiveMajorVersion(context.getMetaData().getWebDescriptor().getMajorVersion());
context.getServletContext().setEffectiveMinorVersion(context.getMetaData().getWebDescriptor().getMinorVersion());
}
/**
* Get the quickstart-web.xml Path from the webapp (from attributes if present, or built from the context's {@link WebAppContext#getWebInf()}).
*
* @param context the web app context
* @return the Path for the quickstart-web.xml
* @throws IOException if unable to build the quickstart xml
*/
public static Path getQuickStartWebXml(WebAppContext context) throws IOException {
Object attr = context.getAttribute(QUICKSTART_WEB_XML);
if (attr instanceof Path)
return (Path) attr;
Path webInfDir = getWebInfPath(context);
Path qstartPath = webInfDir.resolve("quickstart-web.xml");
if (attr != null && StringUtil.isNotBlank(attr.toString())) {
Resource resource;
String attrValue = attr.toString();
try {
// Try a relative resolution
resource = context.getResourceFactory().newResource(webInfDir.resolve(attrValue));
} catch (Throwable th) {
// try as a resource
resource = context.getResourceFactory().newResource(attrValue);
}
if (resource != null) {
Path attrPath = resource.getPath();
if (attrPath != null) {
if (LOG.isDebugEnabled())
LOG.debug("Using quickstart attribute {} value of {}", attr, attrValue);
qstartPath = attrPath;
}
}
}
if (LOG.isDebugEnabled())
LOG.debug("Using quickstart location: {}", qstartPath);
context.setAttribute(QUICKSTART_WEB_XML, qstartPath);
return qstartPath;
}
private static Path getWebInfPath(WebAppContext context) throws IOException {
Path webInfDir = null;
Resource webInf = context.getWebInf();
if (webInf != null) {
webInfDir = webInf.getPath();
}
if (webInfDir == null) {
Path baseResourcePath = findFirstWritablePath(context);
webInfDir = baseResourcePath.resolve("WEB-INF");
// Only create directory if in GENERATE mode
if (getModeForContext(context) == Mode.GENERATE) {
if (!Files.exists(webInfDir))
Files.createDirectories(webInfDir);
}
}
return webInfDir;
}
private static Path findFirstWritablePath(WebAppContext context) throws IOException {
for (Resource resource : context.getBaseResource()) {
Path path = resource.getPath();
if (path == null || !Files.isDirectory(path) || !Files.isWritable(path))
// skip
continue;
return path;
}
throw new IOException("Unable to find writable path in Base Resources");
}
}