Package groovy.servlet

## Class GroovyServlet

- java.lang.Object
- - javax.servlet.GenericServlet
  - - javax.servlet.http.HttpServlet
    - - groovy.servlet.AbstractHttpServlet
      - - groovy.servlet.GroovyServlet

- All Implemented Interfaces:
    `ResourceConnector`, `java.io.Serializable`, `Servlet`, `ServletConfig`

      public class GroovyServlet
      extends AbstractHttpServlet

  This servlet will run Groovy scripts as Groovlets. Groovlets are scripts with these objects implicit in their scope:
  - request - the HttpServletRequest
  - response - the HttpServletResponse
  - application - the ServletContext associated with the servlet
  - session - the HttpSession associated with the HttpServletRequest
  - out - the PrintWriter associated with the ServletRequest

  Your script sources can be placed either in your web application's normal web root (allows for subdirectories) or in /WEB-INF/groovy/* (also allows subdirectories).

  To make your web application more groovy, you must add the GroovyServlet to your application's web.xml configuration using any mapping you like, so long as it follows the pattern *.* (more on this below). Here is the web.xml entry:

          <servlet>
            <servlet-name>Groovy</servlet-name>
            <servlet-class>groovy.servlet.GroovyServlet</servlet-class>
          </servlet>

          <servlet-mapping>
            <servlet-name>Groovy</servlet-name>
            <url-pattern>*.groovy</url-pattern>
            <url-pattern>*.gdo</url-pattern>
          </servlet-mapping>

  The URL pattern does not require the "*.groovy" mapping. You can, for example, make it more Struts-like but groovy by making your mapping "*.gdo".

  See Also:
    `ServletBinding`, Serialized Form

- - ### Field Summary

    - ### Fields inherited from class groovy.servlet.AbstractHttpServlet

      `CONTENT_TYPE_TEXT_HTML, encoding, INC_PATH_INFO, INC_REQUEST_URI, INC_SERVLET_PATH, INIT_PARAM_RESOURCE_NAME_REGEX, INIT_PARAM_RESOURCE_NAME_REGEX_FLAGS, namePrefix, reflection, resourceNamePattern, resourceNameReplaceAll, resourceNameReplacement, servletContext, verbose`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `GroovyServlet()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected GroovyScriptEngine` | `createGroovyScriptEngine()` | Hook method to setup the GroovyScriptEngine to use. Subclasses may override this method to provide a custom engine.
    `void` | `init​(ServletConfig config)` | Initialize the GroovyServlet.
    `void` | `service​(HttpServletRequest request, HttpServletResponse response)` | Handle web requests to the GroovyServlet

    - ### Methods inherited from class groovy.servlet.AbstractHttpServlet

      `applyResourceNameMatcher, generateNamePrefixOnce, getResourceConnection, getScriptUri, getScriptUriAsFile, removeNamePrefix, setVariables`

    - ### Methods inherited from class javax.servlet.http.HttpServlet

      `doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service`

    - ### Methods inherited from class javax.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 Detail

    - #### GroovyServlet

          public GroovyServlet()

  - ### Method Detail

    - #### init

          public void init​(ServletConfig config)
                    throws ServletException

      Initialize the GroovyServlet.
      Specified by:
        `init` in interface `Servlet`
      Overrides:
        `init` in class `AbstractHttpServlet`
      Parameters:
        `config` - the servlet configuration provided by the container
      Throws:
        `ServletException` - if this method encountered difficulties

    - #### service

          public void service​(HttpServletRequest request,
                              HttpServletResponse response)
                       throws java.io.IOException

      Handle web requests to the GroovyServlet
      Overrides:
        `service` in class `HttpServlet`
      Throws:
        `java.io.IOException`

    - #### createGroovyScriptEngine

          protected GroovyScriptEngine createGroovyScriptEngine()

      Hook method to setup the GroovyScriptEngine to use.
      Subclasses may override this method to provide a custom engine.