Package protocols.apps.canvas

Class CanvasPayload

java.lang.Object

protocols.apps.canvas.CanvasPayload

public final class CanvasPayload
extends Object

The canvas's "application protocol" that rides inside the gossip broadcast's opaque byte[] payload. The dissemination layer doesn't know or care what these bytes mean — that's the point of layering: gossip moves bytes; the canvas decides they are a PaintOp.

One paint operation travels per broadcast. We hand-roll the encoding with DataOutputStream (delegating to PaintOp.writeTo(java.io.DataOutputStream)) so the wire format is obvious and matches the snapshot encoding used for sync.

Method Summary

Modifier and Type	Method	Description
static PaintOp	decode(byte[] bytes)	Parse the bytes delivered by the gossip layer back into a paint op.
static byte[]	encode(PaintOp op)	Serialize a paint op to the bytes carried inside a broadcast message.

Methods inherited from class java.lang.Object

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

Method Details

encode

public static byte[] encode(PaintOp op)

Serialize a paint op to the bytes carried inside a broadcast message.

decode

public static PaintOp decode(byte[] bytes)

Parse the bytes delivered by the gossip layer back into a paint op.