/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.openejb.server.cxf.rs;
import org.apache.cxf.jaxrs.ext.ContextProvider;
import org.apache.cxf.jaxrs.ext.MessageContext;
import org.apache.cxf.jaxrs.model.ClassResourceInfo;
import org.apache.cxf.jaxrs.model.OperationResourceInfo;
import org.apache.cxf.jaxrs.provider.ProviderFactory;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
import org.apache.openejb.cdi.CdiAppContextsService;
import org.apache.openejb.rest.ThreadLocalContextManager;
import javax.annotation.Resource;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.SecurityContext;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Providers;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
public final class Contexts {
private static final ThreadLocal<Exchange> EXCHANGE = new ThreadLocal<>();
private static final Set<Class<?>> CONTEXT_CLASSES = contextClasses();
private Contexts() {
// no-op
}
public static Collection<Class<?>> findContextFields(final Class<?> cls, final Collection<Class<?>> types) {
if (cls == Object.class || cls == null) {
return Collections.emptyList();
}
for (final Field f : cls.getDeclaredFields()) {
for (final Annotation a : f.getAnnotations()) {
if (a.annotationType() == Context.class || a.annotationType() == Resource.class
&& isContextClass(f.getType())) {
types.add(f.getType());
}
}
}
findContextFields(cls.getSuperclass(), types);
return types;
}
private static boolean isContextClass(final Class<?> type) {
return CONTEXT_CLASSES.contains(type);
}
private static Set<Class<?>> contextClasses() {
final Set<Class<?>> classes = new HashSet<>(); classes.add(UriInfo.class);
classes.add(SecurityContext.class);
classes.add(HttpHeaders.class);
classes.add(ContextResolver.class);
classes.add(Providers.class);
classes.add(Request.class);
/* TODO: when we have jaxrs 2
classes.add(ResourceInfo.class);
classes.add(ResourceContext.class);
*/
classes.add(Application.class);
classes.add(HttpServletRequest.class);
classes.add(HttpServletResponse.class);
classes.add(ServletConfig.class);
classes.add(ServletContext.class);
classes.add(MessageContext.class);
return classes;
}
@SuppressWarnings("UnusedDeclaration")
public static void bind(final Exchange exchange) {
if (exchange == null) {
return;
}
final ClassResourceInfo cri = exchange.get(OperationResourceInfo.class).getClassResourceInfo();
// binding context fields
final Set<Class<?>> types = new HashSet<>();
for (final Field field : cri.getContextFields()) {
types.add(field.getType());
}
bind(exchange, types);
}
/**
* Using a set ensures we don't set the thread local twice or more,
* there may be super classes with injection points of identical types
* <p/>
* Also allows us to get context references from other sources such as interceptors
*
* @param exchange Exchange
* @param types Collection
*/
public static void bind(final Exchange exchange, final Collection<Class<?>> types) {
EXCHANGE.set(exchange); // used in lazy mode by RESTResourceFinder if cdi beans uses @Context, === initThreadLocal
CdiAppContextsService.pushRequestReleasable(CleanUpThreadLocal.INSTANCE);
for (final Class<?> type : types) {
if (Request.class.equals(type)) {
final Request binding = JAXRSUtils.createContextValue(exchange.getInMessage(), null, Request.class);
ThreadLocalContextManager.REQUEST.set(binding);
} else if (UriInfo.class.equals(type)) {
final UriInfo binding = JAXRSUtils.createContextValue(exchange.getInMessage(), null, UriInfo.class);
ThreadLocalContextManager.URI_INFO.set(binding);
} else if (HttpHeaders.class.equals(type)) {
final HttpHeaders binding = JAXRSUtils.createContextValue(exchange.getInMessage(), null, HttpHeaders.class);
ThreadLocalContextManager.HTTP_HEADERS.set(binding);
} else if (SecurityContext.class.equals(type)) {
final SecurityContext binding = JAXRSUtils.createContextValue(exchange.getInMessage(), null, SecurityContext.class);
ThreadLocalContextManager.SECURITY_CONTEXT.set(binding);
} else if (ContextResolver.class.equals(type)) {
final ContextResolver<?> binding = JAXRSUtils.createContextValue(exchange.getInMessage(), type, ContextResolver.class);
ThreadLocalContextManager.CONTEXT_RESOLVER.set(binding);
} else if (Providers.class.equals(type)) {
final Providers providers = JAXRSUtils.createContextValue(exchange.getInMessage(), null, Providers.class);
ThreadLocalContextManager.PROVIDERS.set(providers);
} else if (ServletRequest.class.equals(type)) {
ServletRequest servletRequest = JAXRSUtils.createContextValue(exchange.getInMessage(), null, ServletRequest.class);
if (servletRequest == null) { // probably the case with CXF
servletRequest = JAXRSUtils.createContextValue(exchange.getInMessage(), null, HttpServletRequest.class);
}
ThreadLocalContextManager.SERVLET_REQUEST.set(servletRequest);
} else if (HttpServletRequest.class.equals(type)) {
final HttpServletRequest httpServletRequest = JAXRSUtils.createContextValue(exchange.getInMessage(), null, HttpServletRequest.class);
ThreadLocalContextManager.HTTP_SERVLET_REQUEST.set(httpServletRequest);
} else if (HttpServletResponse.class.equals(type)) {
final HttpServletResponse httpServletResponse = JAXRSUtils.createContextValue(exchange.getInMessage(), null, HttpServletResponse.class);
ThreadLocalContextManager.HTTP_SERVLET_RESPONSE.set(httpServletResponse);
} else if (ServletConfig.class.equals(type)) {
final ServletConfig servletConfig = JAXRSUtils.createContextValue(exchange.getInMessage(), null, ServletConfig.class);
ThreadLocalContextManager.SERVLET_CONFIG.set(servletConfig);
} else {
final Message message = exchange.getInMessage();
final ContextProvider<?> provider = ProviderFactory.getInstance(message).createContextProvider(type, message);
if (provider != null) {
final Object value = provider.createContext(message);
Map<String, Object> map = ThreadLocalContextManager.OTHERS.get();
if (map == null) {
map = new HashMap<>();
ThreadLocalContextManager.OTHERS.set(map);
}
map.put(type.getName(), value);
}
}
}
}
public static <T> T find(final Class<T> clazz) {
return JAXRSUtils.createContextValue(EXCHANGE.get().getInMessage(), null, clazz);
}
private static class CleanUpThreadLocal implements Runnable {
public static final Runnable INSTANCE = new CleanUpThreadLocal();
@Override
public void run() {
EXCHANGE.remove();
ThreadLocalContextManager.reset();
}
}
}