org.eclipse.jetty.websocket.api.extensions.Extension Maven / Gradle / Ivy
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// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
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// and Apache License v2.0 which accompanies this distribution.
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// http://www.eclipse.org/legal/epl-v10.html
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package org.eclipse.jetty.websocket.api.extensions;
/**
* Interface for WebSocket Extensions.
*
* That {@link Frame}s are passed through the Extension via the {@link IncomingFrames} and {@link OutgoingFrames} interfaces
*/
public interface Extension extends IncomingFrames, OutgoingFrames
{
/**
* The active configuration for this extension.
*
* @return the configuration for this extension. never null.
*/
ExtensionConfig getConfig();
/**
* The Sec-WebSocket-Extensions name for this extension.
*
* Also known as the extension-token per Section 9.1. Negotiating Extensions.
*
* @return the name of the extension
*/
String getName();
/**
* Used to indicate that the extension makes use of the RSV1 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV1.
*
* @return true if extension uses RSV1 for its own purposes.
*/
boolean isRsv1User();
/**
* Used to indicate that the extension makes use of the RSV2 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV2.
*
* @return true if extension uses RSV2 for its own purposes.
*/
boolean isRsv2User();
/**
* Used to indicate that the extension makes use of the RSV3 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV3.
*
* @return true if extension uses RSV3 for its own purposes.
*/
boolean isRsv3User();
/**
* Set the next {@link IncomingFrames} to call in the chain.
*
* @param nextIncoming the next incoming extension
*/
void setNextIncomingFrames(IncomingFrames nextIncoming);
/**
* Set the next {@link OutgoingFrames} to call in the chain.
*
* @param nextOutgoing the next outgoing extension
*/
void setNextOutgoingFrames(OutgoingFrames nextOutgoing);
}