org.tinygroup.weblayer.webcontext.SimpleWebContext Maven / Gradle / Ivy
/**
* Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
*
* Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
*
* 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.tinygroup.weblayer.webcontext;
import org.tinygroup.commons.tools.StringUtil;
import org.tinygroup.commons.tools.ToStringBuilder;
import org.tinygroup.commons.tools.ToStringBuilder.MapBuilder;
import org.tinygroup.logger.LogLevel;
import org.tinygroup.logger.Logger;
import org.tinygroup.logger.LoggerFactory;
import org.tinygroup.weblayer.TinyFilterHandler;
import org.tinygroup.weblayer.WebContext;
import org.tinygroup.weblayer.configmanager.TinyListenerConfigManager;
import org.tinygroup.weblayer.configmanager.TinyListenerConfigManagerHolder;
import org.tinygroup.weblayer.listener.ServletContextHolder;
import org.tinygroup.weblayer.webcontext.rewrite.RewriteWebContext;
import org.tinygroup.weblayer.webcontext.util.WebContextUtil;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletRequestAttributeEvent;
import javax.servlet.ServletRequestAttributeListener;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Enumeration;
import java.util.List;
/**
*
* 功能说明: 实现了WebContext接口，包含request、response和servletContext的信息。
*
*
* 开发人员: renhui
* 开发时间: 2013-5-7
*
*/
public class SimpleWebContext extends CommitMonitor implements WebContext {
private static final Logger logger = LoggerFactory
.getLogger(SimpleWebContext.class);
/**
* 创建一个新的RequestContext对象。
*
* @param webContext
* 当前请求所在的ServletContext
* @param request
* HttpServletRequest对象
* @param response
* HttpServletResponse对象
*/
public SimpleWebContext(WebContext webContext, TinyFilterHandler handler,
HttpServletRequest request, HttpServletResponse response) {
super(webContext, handler);
setRequest(new RequestWrapper(request));
setResponse(new CommittingAwareResponse(response, this));
}
/** 开始一个请求。 */
public void prepare() {
}
/** 结束一个请求。 */
public void commit() {
}
/**
* 显示当前RequestContext的内容。
*
* @return 字符串表示
*/
public String toString() {
MapBuilder mb = new MapBuilder();
mb.append("request", getRequest());
mb.append("response", getResponse());
mb.append("webapp", getServletContext());
return new ToStringBuilder().append(getClass().getSimpleName())
.append(mb).toString();
}
private class RequestWrapper extends AbstractRequestWrapper {
public RequestWrapper(HttpServletRequest request) {
super(SimpleWebContext.this, request);
}
public Object getAttribute(String name) {
Object object = super.getAttribute(name);
if (object == null) {
WebContext topWebContext = getTopWebContext();
if (topWebContext != null) {
object = getFromWrapperContext(name, getTopWebContext());
}
}
return object;
}
public Enumeration getAttributeNames() {
return super.getAttributeNames();
}
public void setAttribute(String name, Object value) {
Object oldValue = getAttribute(name);
super.setAttribute(name, value);
setAttributeListener(name, value,oldValue);
}
private void setAttributeListener(String name, Object newValue,Object oldValue) {
TinyListenerConfigManager configManager = TinyListenerConfigManagerHolder
.getInstance();
List listeners = configManager
.getRequestAttributeListeners();
ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(
ServletContextHolder.getServletContext(), this, name, newValue);
if (oldValue == null) {
for (ServletRequestAttributeListener listener : listeners) {
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] will be attributeAdded",
listener);
listener.attributeAdded(event);
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] attributeAdded",
listener);
}
} else {
for (ServletRequestAttributeListener listener : listeners) {
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] will be attributeReplaced,the oldValue:[{1}]",
listener,oldValue);
listener.attributeReplaced(event);
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] attributeReplaced",
listener);
}
}
}
public void removeAttribute(String name) {
super.removeAttribute(name);
removeAttributeListener(name);
}
private void removeAttributeListener(String name) {
TinyListenerConfigManager configManager = TinyListenerConfigManagerHolder
.getInstance();
List listeners = configManager
.getRequestAttributeListeners();
ServletRequestAttributeEvent event = new ServletRequestAttributeEvent(
ServletContextHolder.getServletContext(), this, name, null);
for (ServletRequestAttributeListener listener : listeners) {
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] will be attributeRemoved",
listener);
listener.attributeRemoved(event);
logger.logMessage(
LogLevel.DEBUG,
"ServletRequestAttributeListener:[{0}] attributeRemoved",
listener);
}
}
public RequestDispatcher getRequestDispatcher(String path) {
RewriteWebContext webContext = WebContextUtil.findWebContext(
(HttpServletRequest) getRequest(), RewriteWebContext.class);
if(webContext!=null){
webContext.setPath(StringUtil.substringBefore(path, "?"));//去除带？后面的字符串
}
return super.getRequestDispatcher(path);
}
}
}