de.tum.ei.lkn.eces.webgraphgui

Class NettyInboundHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

de.tum.ei.lkn.eces.webgraphgui.NettyInboundHandler

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler

@ChannelHandler.Sharable
public class NettyInboundHandler
extends io.netty.channel.ChannelInboundHandlerAdapter

Currently incredibly ugly. We'll clean if we have time, but not very important as it is just the GUI.

Author:

Florian Kreft, Amaury Van Bemten

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field and Description
protected io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker	handshaker
protected NettyHttpFileHandler	httpFileHandler
protected de.tum.ei.lkn.eces.dnm.mappers.NCRequestDataMapper	ncRequestDataMapper
protected de.tum.ei.lkn.eces.routing.mappers.RequestNameMapper	requestNameMapper
protected de.tum.ei.lkn.eces.routing.mappers.SelectedRoutingAlgorithmMapper	selectedRoutingAlgorithmMapper
protected de.tum.ei.lkn.eces.routing.mappers.UnicastRequestMapper	unicastRequestMapper

Constructor Summary

Constructors

Constructor and Description
NettyInboundHandler(de.tum.ei.lkn.eces.core.Controller controller)
NettyInboundHandler(de.tum.ei.lkn.eces.core.Controller controller, ColoringSystem passedColSys)

Method Summary

Modifier and Type	Method and Description
void	addGraph(de.tum.ei.lkn.eces.graph.Graph newGraph)
void	channelActive(io.netty.channel.ChannelHandlerContext ctx)
void	channelRead(io.netty.channel.ChannelHandlerContext ctx, Object msg)
void	componentStateEdge(de.tum.ei.lkn.eces.graph.Edge newEdge, String newStatus)
void	componentStateNode(de.tum.ei.lkn.eces.graph.Node newNode, String newStatus)
void	exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, Throwable cause)
protected void	handleHttpRequest(io.netty.channel.ChannelHandlerContext ctx, io.netty.handler.codec.http.FullHttpRequest req)
protected void	handleMessageCompleted(io.netty.channel.ChannelHandlerContext ctx, String frameText) Executed when websocket message completely received If the WEbGraphGui frontend sends other websocket messages, process them here.
protected boolean	handleREST(io.netty.channel.ChannelHandlerContext ctx, io.netty.handler.codec.http.FullHttpRequest req)
protected void	handleWebSocketFrame(io.netty.channel.ChannelHandlerContext ctx, io.netty.handler.codec.http.websocketx.WebSocketFrame frame)
protected void	sendAllColors(ChannelStateful channelStateful, long activeGraphId) Send Color Information of all edges in one graph to one specific frontend Used if a Color Scheme is clicked in the dropdown of the frontend
void	sendColorOfEdge(de.tum.ei.lkn.eces.graph.Edge edge) Send Color of one specific edge to all active frontends, taking into account the respective active ColoringScheme Used if the Entity of an edge is updated, possibly changing the color value
protected void	sendCurrentEntityObject(ChannelStateful channelStateful) Executed when message of type "nodeClicked" received
protected void	sendError(io.netty.channel.Channel channel, String errorTypeString, String errorMsg) Can be used to send arbitrary error Message
protected void	sendInitial(io.netty.channel.ChannelHandlerContext ctx) Executed on established websocket connection: go through all registered graphs and send nodes + edges; Send all existing ColorScheme Names
void	sendWebsocketFrameToAll(String frameText) Send a arbitrary text message as Websocket frame to all established websocket connections (connected frontends) Mainly used if all frontends need to be updated (e.g.
protected void	startColorDaemon(ChannelStateful channelStateful, long activeGraphId)
void	updatedActiveEntity(long updatedEntityId)

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Field Detail

httpFileHandler

protected NettyHttpFileHandler httpFileHandler

handshaker

protected io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker handshaker

ncRequestDataMapper

protected de.tum.ei.lkn.eces.dnm.mappers.NCRequestDataMapper ncRequestDataMapper

selectedRoutingAlgorithmMapper

protected de.tum.ei.lkn.eces.routing.mappers.SelectedRoutingAlgorithmMapper selectedRoutingAlgorithmMapper

unicastRequestMapper

protected de.tum.ei.lkn.eces.routing.mappers.UnicastRequestMapper unicastRequestMapper

requestNameMapper

protected de.tum.ei.lkn.eces.routing.mappers.RequestNameMapper requestNameMapper

Constructor Detail

NettyInboundHandler

public NettyInboundHandler(de.tum.ei.lkn.eces.core.Controller controller)

NettyInboundHandler

public NettyInboundHandler(de.tum.ei.lkn.eces.core.Controller controller,
                           ColoringSystem passedColSys)

Method Detail

channelActive

public void channelActive(io.netty.channel.ChannelHandlerContext ctx)
                   throws Exception

Specified by:

channelActive in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelActive in class io.netty.channel.ChannelInboundHandlerAdapter

Throws:

Exception

channelRead

public void channelRead(io.netty.channel.ChannelHandlerContext ctx,
                        Object msg)
                 throws Exception

Specified by:

channelRead in interface io.netty.channel.ChannelInboundHandler

Overrides:

channelRead in class io.netty.channel.ChannelInboundHandlerAdapter

Throws:

Exception

handleREST

protected boolean handleREST(io.netty.channel.ChannelHandlerContext ctx,
                             io.netty.handler.codec.http.FullHttpRequest req)

handleHttpRequest

protected void handleHttpRequest(io.netty.channel.ChannelHandlerContext ctx,
                                 io.netty.handler.codec.http.FullHttpRequest req)
                          throws Exception

Throws:

Exception

handleMessageCompleted

protected void handleMessageCompleted(io.netty.channel.ChannelHandlerContext ctx,
                                      String frameText)

Executed when websocket message completely received If the WEbGraphGui frontend sends other websocket messages, process them here.

Parameters:

ctx - ChannelHandlerContext that recieved message, used for sending answers

frameText - should be message in JSON Format with type and possible additional Information

sendInitial

protected void sendInitial(io.netty.channel.ChannelHandlerContext ctx)

Executed on established websocket connection: go through all registered graphs and send nodes + edges; Send all existing ColorScheme Names

Parameters:

ctx - ChannelHandlerContext of new connection

sendCurrentEntityObject

protected void sendCurrentEntityObject(ChannelStateful channelStateful)

Executed when message of type "nodeClicked" received

Parameters:

channelStateful - Needed because several instances of the frontend can be open with different activeEntitys

sendError

protected void sendError(io.netty.channel.Channel channel,
                         String errorTypeString,
                         String errorMsg)

Can be used to send arbitrary error Message

Parameters:

channel - channel to which to send the error

errorTypeString - Name of Error

errorMsg - additional Information

sendAllColors

protected void sendAllColors(ChannelStateful channelStateful,
                             long activeGraphId)

Send Color Information of all edges in one graph to one specific frontend Used if a Color Scheme is clicked in the dropdown of the frontend

Parameters:

channelStateful - channel to which to send the color values

activeGraphId - limits messages to only the currently active graph of that specific frontend

sendColorOfEdge

public void sendColorOfEdge(de.tum.ei.lkn.eces.graph.Edge edge)

Send Color of one specific edge to all active frontends, taking into account the respective active ColoringScheme Used if the Entity of an edge is updated, possibly changing the color value

Parameters:

edge - edge that should be colored

sendWebsocketFrameToAll

public void sendWebsocketFrameToAll(String frameText)

Send a arbitrary text message as Websocket frame to all established websocket connections (connected frontends) Mainly used if all frontends need to be updated (e.g. update of edge/node)

Parameters:

frameText - complete Message text, should be JSON (mostly)

handleWebSocketFrame

protected void handleWebSocketFrame(io.netty.channel.ChannelHandlerContext ctx,
                                    io.netty.handler.codec.http.websocketx.WebSocketFrame frame)

exceptionCaught

public void exceptionCaught(io.netty.channel.ChannelHandlerContext ctx,
                            Throwable cause)

Specified by:

exceptionCaught in interface io.netty.channel.ChannelHandler

Specified by:

exceptionCaught in interface io.netty.channel.ChannelInboundHandler

Overrides:

exceptionCaught in class io.netty.channel.ChannelInboundHandlerAdapter

componentStateNode

public void componentStateNode(de.tum.ei.lkn.eces.graph.Node newNode,
                               String newStatus)

componentStateEdge

public void componentStateEdge(de.tum.ei.lkn.eces.graph.Edge newEdge,
                               String newStatus)

addGraph

public void addGraph(de.tum.ei.lkn.eces.graph.Graph newGraph)

updatedActiveEntity

public void updatedActiveEntity(long updatedEntityId)

startColorDaemon

protected void startColorDaemon(ChannelStateful channelStateful,
                                long activeGraphId)