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## org.apache.catalina
Interface Response

All Known Subinterfaces:
  HttpResponse

All Known Implementing Classes:
  CoyoteResponse, CoyoteResponse, DummyResponse

public interface Response

A Response is the Catalina-internal facade for a `ServletResponse` that is to be produced, based on the processing of a corresponding `Request`.

Version:
  $Revision: 1.3 $ $Date: 2004/01/20 19:38:38 $
Author:
  Craig R. McClanahan

Method Summary
`javax.servlet.ServletOutputStream` | `createOutputStream()` Create and return a ServletOutputStream to write the content associated with this Response.
`void` | `finishResponse()` Perform whatever actions are required to flush and close the output stream or writer, in a single operation.
`Connector` | `getConnector()` Return the Connector through which this Response is returned.
`int` | `getContentCount()` Return the number of bytes actually written to the output stream.
`int` | `getContentLength()` Return the content length that was set or calculated for this Response.
`java.lang.String` | `getContentType()` Return the content type that was set or calculated for this response, or `null` if no content type was set.
`Context` | `getContext()` Return the Context with which this Response is associated.
`boolean` | `getIncluded()` Return the "processing inside an include" flag.
`java.lang.String` | `getInfo()` Return descriptive information about this Response implementation and the corresponding version number, in the format `<description>/<version>`.
`java.io.PrintWriter` | `getReporter()` Return a PrintWriter that can be used to render error messages, regardless of whether a stream or writer has already been acquired.
`Request` | `getRequest()` Return the Request with which this Response is associated.
`javax.servlet.ServletResponse` | `getResponse()` Return the `ServletResponse` for which this object is the facade.
`java.io.OutputStream` | `getStream()` Return the output stream associated with this Response.
`boolean` | `isAppCommitted()` Application commit flag accessor.
`boolean` | `isError()` Error flag accessor.
`boolean` | `isSuspended()` Suspended flag accessor.
`void` | `recycle()` Release all object references, and initialize instance variables, in preparation for reuse of this object.
`void` | `resetBuffer()` Reset the data buffer but not any status or header information.
`void` | `sendAcknowledgement()` Send an acknowledgment of a request.
`void` | `setAppCommitted(boolean appCommitted)` Set the application commit flag.
`void` | `setConnector(Connector connector)` Set the Connector through which this Response is returned.
`void` | `setContext(Context context)` Set the Context with which this Response is associated.
`void` | `setError()` Set the error flag.
`void` | `setIncluded(boolean included)` Set the "processing inside an include" flag.
`void` | `setRequest(Request request)` Set the Request with which this Response is associated.
`void` | `setStream(java.io.OutputStream stream)` Set the output stream associated with this Response.
`void` | `setSuspended(boolean suspended)` Set the suspended flag.

Method Detail

### getConnector

    public Connector getConnector()

  Return the Connector through which this Response is returned.

### setConnector

    public void setConnector(Connector connector)

  Set the Connector through which this Response is returned.

  Parameters:
    `connector` - The new connector

### getContentCount

    public int getContentCount()

  Return the number of bytes actually written to the output stream.

### getContext

    public Context getContext()

  Return the Context with which this Response is associated.

### setContext

    public void setContext(Context context)

  Set the Context with which this Response is associated. This should be called as soon as the appropriate Context is identified.

  Parameters:
    `context` - The associated Context

### setAppCommitted

    public void setAppCommitted(boolean appCommitted)

  Set the application commit flag.

  Parameters:
    `appCommitted` - The new application committed flag value

### isAppCommitted

    public boolean isAppCommitted()

  Application commit flag accessor.

### getIncluded

    public boolean getIncluded()

  Return the "processing inside an include" flag.

### setIncluded

    public void setIncluded(boolean included)

  Set the "processing inside an include" flag.

  Parameters:
    `included` - `true` if we are currently inside a RequestDispatcher.include(), else `false`

### getInfo

    public java.lang.String getInfo()

  Return descriptive information about this Response implementation and the corresponding version number, in the format `<description>/<version>`.

### getRequest

    public Request getRequest()

  Return the Request with which this Response is associated.

### setRequest

    public void setRequest(Request request)

  Set the Request with which this Response is associated.

  Parameters:
    `request` - The new associated request

### getResponse

    public javax.servlet.ServletResponse getResponse()

  Return the `ServletResponse` for which this object is the facade.

### getStream

    public java.io.OutputStream getStream()

  Return the output stream associated with this Response.

### setStream

    public void setStream(java.io.OutputStream stream)

  Set the output stream associated with this Response.

  Parameters:
    `stream` - The new output stream

### setSuspended

    public void setSuspended(boolean suspended)

  Set the suspended flag.

  Parameters:
    `suspended` - The new suspended flag value

### isSuspended

    public boolean isSuspended()

  Suspended flag accessor.

### setError

    public void setError()

  Set the error flag.

### isError

    public boolean isError()

  Error flag accessor.

### createOutputStream

    public javax.servlet.ServletOutputStream createOutputStream()
                                                         throws java.io.IOException

  Create and return a ServletOutputStream to write the content associated with this Response.

  Throws:
    `java.io.IOException` - if an input/output error occurs

### finishResponse

    public void finishResponse()
                        throws java.io.IOException

  Perform whatever actions are required to flush and close the output stream or writer, in a single operation.

  Throws:
    `java.io.IOException` - if an input/output error occurs

### getContentLength

    public int getContentLength()

  Return the content length that was set or calculated for this Response.

### getContentType

    public java.lang.String getContentType()

  Return the content type that was set or calculated for this response, or `null` if no content type was set.

### getReporter

    public java.io.PrintWriter getReporter()
                                    throws java.io.IOException

  Return a PrintWriter that can be used to render error messages, regardless of whether a stream or writer has already been acquired.

  Returns:
    Writer which can be used for error reports. If the response is not an error report returned using sendError or triggered by an unexpected exception thrown during the servlet processing (and only in that case), null will be returned if the response stream has already been used.
  Throws:
    `java.io.IOException` - if an input/output error occurs

### recycle

    public void recycle()

  Release all object references, and initialize instance variables, in preparation for reuse of this object.

### resetBuffer

    public void resetBuffer()

  Reset the data buffer but not any status or header information.

### sendAcknowledgement

    public void sendAcknowledgement()
                             throws java.io.IOException

  Send an acknowledgment of a request.

  Throws:
    `java.io.IOException` - if an input/output error occurs

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