Java Code Examples for javax.servlet.ServletContext#getAttributeNames()

The following examples show how to use javax.servlet.ServletContext#getAttributeNames() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					logger.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 2
Source Project: Project   File: MainServlet.java    License: Apache License 2.0 6 votes vote down vote up
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	//从ServletContext对象中获取到Session信息
	ServletContext servletContext = this.getServletContext();
	
	//获取ServletContext域中所有的属性名
	Enumeration<String> names = servletContext.getAttributeNames();
	
	HttpSession session = req.getSession(false);
	String sessionName = "sessionID" + session.getId();
	
	if (session != null) {
		while (names.hasMoreElements()) {
			String name = names.nextElement();
			//System.out.println(name);
			if (name.equals(sessionName)) {
				HttpSession temp = (HttpSession) servletContext.getAttribute(name);
				System.out.println(temp.getAttribute("user"));
			}
		}
	}
}
 
Example 3
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					logger.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 4
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					logger.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 5
/**
 *  销毁一个消费端 
 *  
 *     该方法  会通过传递的   ConsumerID 从 servletContext 查询 是否有 该对象 
 *     然后调用 其销毁方法 
 * 
 * @param ConsumerID    消费者唯一标识   
 * @return   
 */
@RequestMapping(method = RequestMethod.DELETE)
public ResponseEntity<String> destroyMqConsumer(@RequestParam("Consumer") String Consumer)
{

	ServletContext servletContext = request.getServletContext();

	Enumeration<String> attributeNames = servletContext.getAttributeNames();

	List<String> outList = new ArrayList<String>();

	Object AttributeConsumer = servletContext.getAttribute(Consumer);
	if (AttributeConsumer != null)
	{
		MqConsumer mqConsumer = (MqConsumer) AttributeConsumer;
		mqConsumer.destroy();
		servletContext.setAttribute(Consumer, null);

		return ResponseEntity.status(HttpStatus.OK).body(Consumer + " 消费者销毁成功");
	}

	return ResponseEntity.status(HttpStatus.NOT_FOUND).body(Consumer + " 未找到   该消费者 ");
}
 
Example 6
/**
 * 获取servletContext 中存放的 所有  消费者对象 唯一标识 
 * 
 * @return  返回  说有消费者唯一标识  
 * 
 */
@RequestMapping(method = RequestMethod.GET)
public List<AttributeNames> queryMqConsumerList()
{
	ServletContext servletContext = request.getServletContext();
	List<AttributeNames> list = new ArrayList<AttributeNames>();
	Enumeration<String> attributeNames = servletContext.getAttributeNames();
	while (attributeNames.hasMoreElements())
	{
		String nameString = (String) attributeNames.nextElement();
		if (nameString.contains("@"))
		{
			AttributeNames attri = new AttributeNames();
			attri.setKid(nameString);
			list.add(attri);
		}
	}
	return list;
}
 
Example 7
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					logger.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 8
Source Project: mdw   File: WebAppContext.java    License: Apache License 2.0 6 votes vote down vote up
public static SysInfoCategory getContainerInfo(ServletContext context) {
    List<SysInfo> containerInfos = new ArrayList<SysInfo>();
    containerInfos.add(new SysInfo("Root path", context.getRealPath("/")));
    containerInfos.add(new SysInfo("Servlet container", context.getServerInfo()));
    containerInfos.add(new SysInfo("Servlet version", context.getMajorVersion() + "." + context.getMinorVersion()));
    containerInfos.add(new SysInfo("Servlet context", context.getServletContextName()));
    SysInfo attrInfo = new SysInfo("Attributes");
    Enumeration<?> attrNames = context.getAttributeNames();
    while (attrNames.hasMoreElements()) {
        String attrName = (String)attrNames.nextElement();
        if (!"org.apache.tomcat.util.scan.MergedWebXml".equals(attrName) && !"org.apache.catalina.jsp_classpath".equals(attrName))
        attrInfo.addSysInfo(new SysInfo(attrName, String.valueOf(context.getAttribute(attrName))));
    }
    containerInfos.add(attrInfo);
    return new SysInfoCategory("Container Details", containerInfos);
}
 
Example 9
Source Project: flow   File: JSR356WebsocketInitializer.java    License: Apache License 2.0 6 votes vote down vote up
@Override
public void contextDestroyed(ServletContextEvent sce) {
    // Destroy any AtmosphereFramework instance we have initialized.
    // This must be done here to ensure that we cleanup Atmosphere instances
    // related to servlets which are never initialized
    ServletContext servletContext = sce.getServletContext();
    Enumeration<String> attributeNames = servletContext.getAttributeNames();
    while (attributeNames.hasMoreElements()) {
        String attributeName = attributeNames.nextElement();
        if (isAtmosphereFrameworkAttribute(attributeName)) {
            Object value = servletContext.getAttribute(attributeName);
            if (value instanceof AtmosphereFramework) {
                // This might result in calling destroy() twice, once from
                // here and once from PushRequestHandler but
                // AtmosphereFramework.destroy() deals with that
                ((AtmosphereFramework) value).destroy();
            }
        }
    }
}
 
Example 10
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
private static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					log.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 11
Source Project: oryx   File: ModelManagerListener.java    License: Apache License 2.0 6 votes vote down vote up
@Override
public void contextDestroyed(ServletContextEvent sce) {
  log.info("ModelManagerListener destroying");
  // Slightly paranoid; remove objects from app scope manually
  ServletContext context = sce.getServletContext();
  for (Enumeration<String> names = context.getAttributeNames(); names.hasMoreElements();) {
    context.removeAttribute(names.nextElement());
  }

  close();

  // Hacky, but prevents Tomcat from complaining that ZK's cleanup thread 'leaked' since
  // it has a short sleep at its end
  try {
    Thread.sleep(1000);
  } catch (InterruptedException ie) {
    // continue
  }
}
 
Example 12
/**
 * Find all ServletContext attributes which implement {@link DisposableBean}
 * and destroy them, removing all affected ServletContext attributes eventually.
 * @param sc the ServletContext to check
 */
private static void cleanupAttributes(ServletContext sc) {
	Enumeration<String> attrNames = sc.getAttributeNames();
	while (attrNames.hasMoreElements()) {
		String attrName = attrNames.nextElement();
		if (attrName.startsWith("org.springframework.")) {
			Object attrValue = sc.getAttribute(attrName);
			if (attrValue instanceof DisposableBean) {
				try {
					((DisposableBean) attrValue).destroy();
				}
				catch (Throwable ex) {
					log.error("Couldn't invoke destroy method of attribute with name '" + attrName + "'", ex);
				}
			}
		}
	}
}
 
Example 13
Source Project: cumulusrdf   File: InfoServlet.java    License: Apache License 2.0 5 votes vote down vote up
@SuppressWarnings("unchecked")
@Override
public void service(final HttpServletRequest request, final HttpServletResponse response) throws IOException, ServletException {
	
	String accept = request.getHeader(Headers.ACCEPT) == null ? "text/plain" : request.getHeader(Headers.ACCEPT);
	
	if (accept.contains("html")) {
		
		request.setAttribute("page", "Overview");
		forwardTo(request, response, "info.vm");
		
	} else {

		PrintWriter out = response.getWriter();
		response.setContentType(MimeTypes.TEXT_PLAIN);

		ServletContext ctx = getServletContext();
		Store crdf = (Store) getServletContext().getAttribute(ConfigParams.STORE);

		out.println("Status: " + crdf.getStatus());

		for (Enumeration<String> e = ctx.getAttributeNames(); e.hasMoreElements();) {
			String attr = e.nextElement();
			out.println("Setting: attribute = " + attr + " @ value = " + ctx.getAttribute(attr));
		}

		out.close();
	}
}
 
Example 14
Source Project: ldp4j   File: BootstrapUtil.java    License: Apache License 2.0 5 votes vote down vote up
private static void addAttributeMessages(ServletContext context,Map<String, Object> messages) {
	Enumeration<String> attributeNames = context.getAttributeNames();
	if(attributeNames==null || !attributeNames.hasMoreElements()) {
		return;
	}
	StringBuilder builder=new StringBuilder();
	while(attributeNames.hasMoreElements()) {
		String name = attributeNames.nextElement();
		buildAttributeMessage(builder,name,context.getAttribute(name));
	}
	addMessage(messages,"Attributes",builder.toString());
}
 
Example 15
public static Set<String> init(final ServletContext context, final Set<String> existing) {
    if(existing != null) {
        return existing;
    }
    final Set<String> ret = new HashSet<String>();
    Enumeration names = context.getAttributeNames();
    while (names.hasMoreElements()) {
        ret.add((String) names.nextElement());
    }
    return ret;
}
 
Example 16
/**
 * Clear any resteasy stuff from the context
 *
 * @param servletContext
 */
private void clearContext(final ServletContext servletContext, final Set<String> doNotClear) {
    final Enumeration names = servletContext.getAttributeNames();
    while (names.hasMoreElements()) {
        final String name = names.nextElement().toString();
        if (name.startsWith("org.jboss.resteasy") && !doNotClear.contains(name)) {
            servletContext.removeAttribute(name);
        }
    }
}
 
Example 17
Source Project: netbeans   File: MonitorFilter.java    License: Apache License 2.0 4 votes vote down vote up
/**
    * Creates a Param[] of attributes from a Context
    */
   private Param[] recordContextAttributes(ServletContext context) {

if(debug) log("recordContextAttributes"); //NOI18N

Vector v = new Vector();
 
Enumeration e = context.getAttributeNames();
 
while (e.hasMoreElements()) {
    String name = (String)e.nextElement();
    if(debug) log(" name: " + name);  //NOI18N
    Object value = context.getAttribute(name);
           String valueRep = null;
           try {
               if(value == null) {
                   valueRep = ResourceBundle.getBundle("org.netbeans.modules.web.monitor.server.Bundle").getString("MON_Warning_attributes"); //NOI18N
               } else if (value.getClass().isArray()) {
                   Object[] valueItems = (Object[])value;
                   StringBuffer sb = new StringBuffer(valueItems.length * 16);
                   if (valueItems.length > 0) sb.append(valueItems[0]);
                   for(int i=1; i < valueItems.length; i++) {
                       sb.append(", "); // NOI18N
                       sb.append(valueItems[i]);
                   }
                   valueRep = sb.toString();
               } else {
                   valueRep = value.toString();
                   if (valueRep == null) {
                       valueRep = ResourceBundle.getBundle("org.netbeans.modules.web.monitor.server.Bundle").getString("MON_Warning_toString_null"); //NOI18N
                   }
               }
           } catch (Throwable t) {
               // Ensure that the monitor can continue to run even if there is a
               // serious problem in the application code that it is monitoring
               valueRep = ResourceBundle.getBundle("org.netbeans.modules.web.monitor.server.Bundle").getString("MON_Warning_toString_exception"); //NOI18N
           }
    Param p = new Param();
    p.setAttributeValue("name", name);  //NOI18N
    p.setAttributeValue("value", valueRep);  //NOI18N
    v.add(p);
}
int size = v.size();
Param[] params = new Param[size];
for(int i=0; i< size; ++i) 
    params[i] = (Param)v.elementAt(i);

return params;
   }
 
Example 18
public static Enumeration<String> getAttributeNames(ServletContext container) { return (container != null) ? container.getAttributeNames() : null; }