RequestContext (SmartClient Enterprise Server API 14.0d (2024-12-22))

java.lang.Object
- com.isomorphic.servlet.RequestContext

```
public class RequestContext
extends java.lang.Object
```
RequestContext aggregates state about the current request.

Field Summary

Fields
Modifier and Type	Field and Description
`ISCHttpServletRequest`	`request` `ISCHttpServletRequest` instance for the current request.
`javax.servlet.http.HttpServletResponse`	`response` `HttpServletResponse` instance associated with this request

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static RequestContext`	`instance(javax.servlet.jsp.PageContext pageContext)` Creates a `RequestContext` from a JSP `PageContext`.
`static RequestContext`	`instance(javax.servlet.ServletContext servletContext, javax.servlet.ServletRequest request, javax.servlet.ServletResponse response)` Creates a `RequestContext` from a ServletContext, ServletRequest and ServletResponse.
`static RequestContext`	`instance(javax.servlet.Servlet servlet, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)` Creates a `RequestContext` from a `Servlet`, `HttpServletRequest` and `HttpServletResponse`.
`static RequestContext`	`instance(javax.servlet.Servlet servlet, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, java.io.Writer out)` Creates a `RequestContext` from a `Servlet`, `HttpServletRequest`, `HttpServletResponse` and `Writer`.
`static RequestContext`	`instance(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response)` Creates a `RequestContext` from a `ServletRequest` and `ServletResponse`.
`static void`	`setCacheControlHeader(javax.servlet.http.HttpServletResponse response, java.lang.String value)` Sets the Cache-Control HTTP response header directly
`void`	`setCacheControlHeader(java.lang.String value)` Sets the Cache-Control HTTP response header directly
`void`	`setCachePolicy(CachePolicy[] directives)` Sets the Cache-Control HTTP response header
`static void`	`setCachePolicy(javax.servlet.http.HttpServletResponse response, CachePolicy[] directives)` Sets the Cache-Control HTTP response header

- Field Detail
  - request
```
public ISCHttpServletRequest request
```
    ISCHttpServletRequest instance for the current request.
  - response
```
public javax.servlet.http.HttpServletResponse response
```
    HttpServletResponse instance associated with this request
- Method Detail
  - instance
```
public static RequestContext instance(javax.servlet.jsp.PageContext pageContext)
                               throws java.lang.Exception
```
    Creates a RequestContext from a JSP PageContext.
    
    Parameters:
    
    pageContext - the page context to use for creating the RequestContext
    
    Returns:
    
    the new RequestContext
    
    Throws:
    
    java.lang.Exception
    
    See Also:
    
    RequestContext.instance(ServletContext, ServletRequest, ServletResponse)
  - instance
```
public static RequestContext instance(javax.servlet.ServletRequest request,
                                      javax.servlet.ServletResponse response)
                               throws java.lang.Exception
```
    Creates a RequestContext from a ServletRequest and ServletResponse.
    
    Parameters:
    
    request - the ServletRequest
    
    response - the ServletResponse
    
    Returns:
    
    the new RequestContext
    
    Throws:
    
    java.lang.Exception
    
    See Also:
    
    RequestContext.instance(ServletContext, ServletRequest, ServletResponse)
  - instance
```
public static RequestContext instance(javax.servlet.Servlet servlet,
                                      javax.servlet.http.HttpServletRequest request,
                                      javax.servlet.http.HttpServletResponse response)
                               throws java.lang.Exception
```
    Creates a RequestContext from a Servlet, HttpServletRequest and HttpServletResponse.
    
    Parameters:
    
    servlet - the servlet
    
    request - the HttpServletRequest
    
    response - the HttpServletResponse
    
    Throws:
    
    java.lang.Exception
    
    See Also:
    
    RequestContext.instance(ServletContext, ServletRequest, ServletResponse)
  - instance
```
public static RequestContext instance(javax.servlet.Servlet servlet,
                                      javax.servlet.http.HttpServletRequest request,
                                      javax.servlet.http.HttpServletResponse response,
                                      java.io.Writer out)
                               throws java.lang.Exception
```
    Creates a RequestContext from a Servlet, HttpServletRequest, HttpServletResponse and Writer.
    
    Parameters:
    
    servlet - the Servlet
    
    request - the HttpServletRequest
    
    response - the HttpServletResponse
    
    out - the output writer
    
    Returns:
    
    the new RequestContext
    
    Throws:
    
    java.lang.Exception
    
    See Also:
    
    RequestContext.instance(ServletContext, ServletRequest, ServletResponse)
  - instance
```
public static RequestContext instance(javax.servlet.ServletContext servletContext,
                                      javax.servlet.ServletRequest request,
                                      javax.servlet.ServletResponse response)
                               throws java.lang.Exception
```
    Creates a RequestContext from a ServletContext, ServletRequest and ServletResponse.
    Important Note
    Before we explain the benefits of creating your own RequestContext please take note that only one instance of this must be created and passed along during a requests life-cycle. In normal circumstances one will be created through the IDACall servlet and there will be no need for you to handle this explicitly.
    
    A typical use case for explicitly creating a RequestContext is is you've implemented your own standalone servlet which does not extend IDACall and you require the servlet request/response to be available further down the request chain such as in a DMI call you might issue from your servlet. This could be useful when passing session related data down to your DMI implementations for instance. Once you've created a RequestContext you simply set it on your DSRequest or RPCRequest using setContext(requestContext).
    
    Parameters:
    
    servletContext - the servlet context.
    
    request - the servlet request.
    
    response - the servlet response.
    
    Returns:
    
    a RequestContext.
    
    Throws:
    
    java.lang.Exception
    
    See Also:
    
    BaseRequest.setContext(RequestContext)
  - setCachePolicy
```
public void setCachePolicy(CachePolicy[] directives)
                    throws java.lang.Exception
```
    Sets the Cache-Control HTTP response header
    
    Parameters:
    
    directives - an array of CachePolicy response directives
    
    Throws:
    
    java.lang.Exception
  - setCachePolicy
```
public static void setCachePolicy(javax.servlet.http.HttpServletResponse response,
                                  CachePolicy[] directives)
```
    Sets the Cache-Control HTTP response header
    
    Parameters:
    
    response - HttpServletResponse to set header to
    
    directives - an array of CachePolicy response directives
  - setCacheControlHeader
```
public void setCacheControlHeader(java.lang.String value)
                           throws java.lang.Exception
```
    Sets the Cache-Control HTTP response header directly
    
    Parameters:
    
    value - String of response directives
    
    Throws:
    
    java.lang.Exception
  - setCacheControlHeader
```
public static void setCacheControlHeader(javax.servlet.http.HttpServletResponse response,
                                         java.lang.String value)
```
    Sets the Cache-Control HTTP response header directly
    
    Parameters:
    
    response - HttpServletResponse to set header to
    
    value - String of response directives

Class RequestContext

Field Summary

Method Summary

Field Detail

request

response

Method Detail

instance

instance

instance

instance

instance

setCachePolicy

setCachePolicy

setCacheControlHeader

setCacheControlHeader