Class StatusManagerServlet
- java.lang.Object
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- javax.servlet.GenericServlet
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- javax.servlet.http.HttpServlet
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- org.apache.catalina.manager.StatusManagerServlet
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- All Implemented Interfaces:
java.io.Serializable
,java.util.EventListener
,javax.management.NotificationListener
,Servlet
,ServletConfig
public class StatusManagerServlet extends HttpServlet implements javax.management.NotificationListener
This servlet will display a complete status of the HTTP/1.1 connector.- Author:
- Remy Maucherat
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected java.util.Vector<javax.management.ObjectName>
globalRequestProcessors
Vector of global request processors object names.protected javax.management.MBeanServer
mBeanServer
MBean server.protected java.util.Vector<javax.management.ObjectName>
protocolHandlers
Deprecated.Unused.protected java.util.Vector<javax.management.ObjectName>
requestProcessors
Vector of request processors object names.protected static StringManager
sm
The string manager for this package.protected java.util.Vector<javax.management.ObjectName>
threadPools
Vector of thread pools object names.
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Constructor Summary
Constructors Constructor Description StatusManagerServlet()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
destroy()
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service.void
doGet(HttpServletRequest request, HttpServletResponse response)
Called by the server (via theservice
method) to allow a servlet to handle a GET request.void
handleNotification(javax.management.Notification notification, java.lang.Object handback)
void
init()
A convenience method which can be overridden so that there's no need to callsuper.init(config)
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Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service
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Methods inherited from class javax.servlet.GenericServlet
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log
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Field Detail
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mBeanServer
protected javax.management.MBeanServer mBeanServer
MBean server.
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protocolHandlers
@Deprecated protected final java.util.Vector<javax.management.ObjectName> protocolHandlers
Deprecated.Unused. Will be removed in Tomcat 10.1.xVector of protocol handlers object names.
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threadPools
protected final java.util.Vector<javax.management.ObjectName> threadPools
Vector of thread pools object names.
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requestProcessors
protected final java.util.Vector<javax.management.ObjectName> requestProcessors
Vector of request processors object names.
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globalRequestProcessors
protected final java.util.Vector<javax.management.ObjectName> globalRequestProcessors
Vector of global request processors object names.
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sm
protected static final StringManager sm
The string manager for this package.
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Method Detail
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init
public void init() throws ServletException
Description copied from class:javax.servlet.GenericServlet
A convenience method which can be overridden so that there's no need to callsuper.init(config)
.Instead of overriding
GenericServlet.init(ServletConfig)
, simply override this method and it will be called byGenericServlet.init(ServletConfig config)
. TheServletConfig
object can still be retrieved viaGenericServlet.getServletConfig()
.- Overrides:
init
in classGenericServlet
- Throws:
ServletException
- if an exception occurs that interrupts the servlet's normal operation
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destroy
public void destroy()
Description copied from class:javax.servlet.GenericServlet
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. SeeServlet.destroy()
.- Specified by:
destroy
in interfaceServlet
- Overrides:
destroy
in classGenericServlet
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doGet
public void doGet(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, ServletException
Description copied from class:javax.servlet.http.HttpServlet
Called by the server (via theservice
method) to allow a servlet to handle a GET request.Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a GET request that returns no body in the response, only the request header fields.
When overriding this method, read the request data, write the response headers, get the response's Writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a
PrintWriter
object to return the response, set the content type before accessing thePrintWriter
object.The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.
Where possible, set the Content-Length header (with the
ServletResponse.setContentLength(int)
method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.When using HTTP 1.1 chunked encoding (which means that the response has a Transfer-Encoding header), do not set the Content-Length header.
The GET method should be safe, that is, without any side effects for which users are held responsible. For example, most form queries have no side effects. If a client request is intended to change stored data, the request should use some other HTTP method.
The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online or modifying data is neither safe nor idempotent.
If the request is incorrectly formatted,
doGet
returns an HTTP "Bad Request" message.- Overrides:
doGet
in classHttpServlet
- Parameters:
request
- anHttpServletRequest
object that contains the request the client has made of the servletresponse
- anHttpServletResponse
object that contains the response the servlet sends to the client- Throws:
java.io.IOException
- if an input or output error is detected when the servlet handles the GET requestServletException
- if the request for the GET could not be handled- See Also:
ServletResponse.setContentType(java.lang.String)
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handleNotification
public void handleNotification(javax.management.Notification notification, java.lang.Object handback)
- Specified by:
handleNotification
in interfacejavax.management.NotificationListener
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