Module com.aoapps.servlet.util

Package com.aoapps.servlet.tomcat

Class GetParallelDeploymentVersion

java.lang.Object

jakarta.servlet.GenericServlet

jakarta.servlet.http.HttpServlet

com.aoapps.servlet.tomcat.GetParallelDeploymentVersion

All Implemented Interfaces:

Servlet, ServletConfig, Serializable

public class GetParallelDeploymentVersion
extends HttpServlet

Gets the Tomcat parallel deployment version based on the path the application is deployed to. Uses ServletContext.getRealPath("/"), then takes the version as the final part of the directory name if contains "##". This is specific to Tomcat installations, and should not be assumed to apply generally.

See Also:

• Serialized Form

Field Summary

Fields inherited from class jakarta.servlet.http.HttpServlet

LEGACY_DO_HEAD

Constructor Summary

Constructors

Constructor	Description
GetParallelDeploymentVersion()

Method Summary

Modifier and Type	Method	Description
protected void	doGet(HttpServletRequest request, HttpServletResponse response)
static Optional<String>	getParallelDeploymentVersion(ServletContext context)	Gets the parallel deployment version by parsing the deploy directory observed by calling ServletContext.getRealPath("/").

Methods inherited from class jakarta.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, init, service, service

Methods inherited from class jakarta.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GetParallelDeploymentVersion

public GetParallelDeploymentVersion()

Method Details

getParallelDeploymentVersion

public static Optional<String> getParallelDeploymentVersion(ServletContext context)

Gets the parallel deployment version by parsing the deploy directory observed by calling ServletContext.getRealPath("/").

If unable to find, the specific reason is logged with level Level.WARNING or Level.SEVERE, depending on the nature of the failure. This method is not expected to be used frequently, only after deployments and possibly via occasional audit / monitoring. Logging of these messages is considered best from a security standpoint and are not expected to fill storage space significantly.

Returns:

The non-empty string of the parallel deployment version or Optional.empty() when unable to determine the version (in which case the underlying cause is logged).

doGet

protected void doGet(HttpServletRequest request,
 HttpServletResponse response)
              throws ServletException,
IOException

Overrides:

doGet in class HttpServlet

Throws:

ServletException

IOException