org.springframework.boot.context.embedded.jetty.ServletContextInitializerConfiguration Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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
*
* 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.springframework.boot.context.embedded.jetty;
import javax.servlet.ServletException;
import org.eclipse.jetty.util.component.AbstractLifeCycle;
import org.eclipse.jetty.webapp.AbstractConfiguration;
import org.eclipse.jetty.webapp.Configuration;
import org.eclipse.jetty.webapp.WebAppContext;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.util.Assert;
/**
* Jetty {@link Configuration} that calls {@link ServletContextInitializer}s.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
public class ServletContextInitializerConfiguration extends AbstractConfiguration {
private final ServletContextInitializer[] initializers;
/**
* Create a new {@link ServletContextInitializerConfiguration}.
* @param initializers the initializers that should be invoked
* @since 1.2.1
*/
public ServletContextInitializerConfiguration(
ServletContextInitializer... initializers) {
Assert.notNull(initializers, "Initializers must not be null");
this.initializers = initializers;
}
@Override
public void configure(WebAppContext context) throws Exception {
context.addBean(new Initializer(context), true);
}
/**
* Jetty {@link AbstractLifeCycle} to call the {@link ServletContextInitializer
* ServletContextInitializers}.
*/
private class Initializer extends AbstractLifeCycle {
private final WebAppContext context;
Initializer(WebAppContext context) {
this.context = context;
}
@Override
protected void doStart() throws Exception {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(this.context.getClassLoader());
try {
callInitializers();
}
finally {
Thread.currentThread().setContextClassLoader(classLoader);
}
}
private void callInitializers() throws ServletException {
try {
setExtendedListenerTypes(true);
for (ServletContextInitializer initializer : ServletContextInitializerConfiguration.this.initializers) {
initializer.onStartup(this.context.getServletContext());
}
}
finally {
setExtendedListenerTypes(false);
}
}
private void setExtendedListenerTypes(boolean extended) {
try {
this.context.getServletContext().setExtendedListenerTypes(extended);
}
catch (NoSuchMethodError ex) {
// Not available on Jetty 8
}
}
}
}