org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedContext Maven / Gradle / Ivy
/*
* Copyright 2012-2014 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.tomcat;
import java.lang.reflect.Method;
import org.apache.catalina.Container;
import org.apache.catalina.core.StandardContext;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;
/**
* Tomcat {@link StandardContext} used by {@link TomcatEmbeddedServletContainer} to
* support deferred initialization.
*
* @author Phillip Webb
*/
class TomcatEmbeddedContext extends StandardContext {
private ServletContextInitializerLifecycleListener starter;
@Override
public boolean loadOnStartup(Container[] children) {
return true;
}
public void deferredLoadOnStartup() {
// Some older Servlet frameworks (e.g. Struts, BIRT) use the Thread context class
// loader to create servlet instances in this phase. If they do that and then try
// to initialize them later the class loader may have changed, so wrap the call to
// loadOnStartup in what we think its going to be the main webapp classloader at
// runtime.
ClassLoader classLoader = getLoader().getClassLoader();
ClassLoader existingLoader = null;
if (classLoader != null) {
existingLoader = ClassUtils.overrideThreadContextClassLoader(classLoader);
}
if (ClassUtils.isPresent("org.apache.catalina.deploy.ErrorPage", null)) {
super.loadOnStartup(findChildren());
}
else {
callSuper(this, "loadOnStartup", findChildren(), Container[].class);
}
if (existingLoader != null) {
ClassUtils.overrideThreadContextClassLoader(existingLoader);
}
}
public void setStarter(ServletContextInitializerLifecycleListener starter) {
this.starter = starter;
}
public ServletContextInitializerLifecycleListener getStarter() {
return this.starter;
}
private void callSuper(Object target, String name, Object value, Class type) {
Method method = ReflectionUtils.findMethod(target.getClass().getSuperclass(),
name, type);
ReflectionUtils.invokeMethod(method, target, value);
}
}