Index (babel-canvas API)

A B C D E G I M N P R S T U V W
All Classes and Interfaces|All Packages|Constant Field Values

A

apply(PaintOp) - Method in class protocols.apps.canvas.PixelCanvas: Apply an op under last-writer-wins.
autoDetectAddress() - Static method in class utils.InterfaceToIp: Auto-detect a reachable bind address: the routable IPv4 of the sole real (non-loopback, up, non-virtual, non-p2p, non-bridge/VM/VPN) interface.

B

broadcast(UUID, int, int, int) - Method in class protocols.apps.canvas.telemetry.Telemetry: Emitted by the origin node when it issues a paint op.

C

CanvasApp - Class in protocols.apps.canvas: The collaborative-canvas application — the top of the stack, and the only protocol a user (or experiment) drives directly.
CanvasApp(Properties, Host, short, short) - Constructor for class protocols.apps.canvas.CanvasApp
CanvasPayload - Class in protocols.apps.canvas: The canvas's "application protocol" that rides inside the gossip broadcast's opaque byte[] payload.
CanvasSyncMessage - Class in protocols.apps.canvas.messages: A point-to-point canvas snapshot exchange, sent directly to one peer (not broadcast) over HyParView's shared channel via sendMessage.
CanvasSyncMessage(CanvasSyncMessage.Kind, List<PaintOp>) - Constructor for class protocols.apps.canvas.messages.CanvasSyncMessage
CanvasSyncMessage.Kind - Enum Class in protocols.apps.canvas.messages
clone() - Method in class protocols.apps.canvas.timers.ControlTimer
clone() - Method in class protocols.apps.canvas.timers.DigestTimer
clone() - Method in class protocols.apps.canvas.timers.WorkloadTimer
ControlTimer - Class in protocols.apps.canvas.timers: Polls the shared control file in orchestrator-coordinated workload mode (see CanvasApp.uponControlTimer).
ControlTimer() - Constructor for class protocols.apps.canvas.timers.ControlTimer

D

decode(byte[]) - Static method in class protocols.apps.canvas.CanvasPayload: Parse the bytes delivered by the gossip layer back into a paint op.
DEFAULT_DIGEST_INTERVAL - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_DIGEST_INTERVAL: "5000" ms.
DEFAULT_HEIGHT - Static variable in class protocols.apps.canvas.CanvasApp: Default canvas height: "48".
DEFAULT_SNAPSHOT_SYNC - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_SNAPSHOT_SYNC: "true".
DEFAULT_UI_ENABLED - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_UI_ENABLED: "true".
DEFAULT_UI_OPEN - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_UI_OPEN: "true".
DEFAULT_UI_PORT_OFFSET - Static variable in class protocols.apps.canvas.CanvasApp: Offset added to the bind port to derive the default UI port.
DEFAULT_WIDTH - Static variable in class protocols.apps.canvas.CanvasApp: Default canvas width: "48".
DEFAULT_WORKLOAD_CONTROL_FILE - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_CONTROL_FILE: "" (empty → legacy timer mode).
DEFAULT_WORKLOAD_CONTROL_POLL_MS - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_CONTROL_POLL_MS: "250" ms.
DEFAULT_WORKLOAD_DURATION - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_DURATION: "0" ms.
DEFAULT_WORKLOAD_ENABLED - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_ENABLED: "false".
DEFAULT_WORKLOAD_RATE - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_RATE: "2" ops/s.
DEFAULT_WORKLOAD_START_DELAY - Static variable in class protocols.apps.canvas.CanvasApp: Default for CanvasApp.PAR_WORKLOAD_START_DELAY: "5000" ms.
deliver(UUID, String) - Method in class protocols.apps.canvas.telemetry.Telemetry: Emitted by every node (including the origin) when an op is delivered locally.
describeInterfaces() - Static method in class utils.InterfaceToIp: Logs every network interface and its IPv4 addresses (with up/loopback/virtual/ point-to-point flags) to help diagnose a wrong auto-selection.
digest() - Method in class protocols.apps.canvas.PixelCanvas: Stable 64-bit digest of the visible canvas: FNV-1a over (index, argb) for every painted cell in row-major order.
digest(long, long, int, int, long, String) - Method in class protocols.apps.canvas.telemetry.Telemetry: Periodic convergence digest of the local canvas.
DigestTimer - Class in protocols.apps.canvas.timers: Fires periodically to make CanvasApp emit a convergence digest of its local canvas to the telemetry log (see CanvasApp.uponDigestTimer).
DigestTimer() - Constructor for class protocols.apps.canvas.timers.DigestTimer

E

EMPTY - Static variable in class protocols.apps.canvas.PixelCanvas: Colour reported for a cell nobody has painted yet (transparent).
encode(PaintOp) - Static method in class protocols.apps.canvas.CanvasPayload: Serialize a paint op to the bytes carried inside a broadcast message.

G

getArgb() - Method in class protocols.apps.canvas.PaintOp
getHeight() - Method in class protocols.apps.canvas.PixelCanvas
getIpOfInterface(String) - Static method in class utils.InterfaceToIp: Returns the first non-loopback IPv4 address of interfaceName, or null if it has none / does not exist.
getKind() - Method in class protocols.apps.canvas.messages.CanvasSyncMessage
getOpId() - Method in class protocols.apps.canvas.PaintOp
getOps() - Method in class protocols.apps.canvas.messages.CanvasSyncMessage
getOriginId() - Method in class protocols.apps.canvas.PaintOp
getTimestamp() - Method in class protocols.apps.canvas.PaintOp
getUiPort() - Method in class protocols.apps.canvas.CanvasApp
getWidth() - Method in class protocols.apps.canvas.PixelCanvas
getX() - Method in class protocols.apps.canvas.PaintOp
getY() - Method in class protocols.apps.canvas.PaintOp

I

init(Properties) - Method in class protocols.apps.canvas.CanvasApp
InterfaceToIp - Class in utils: Resolves the process-wide bind address (babel.address) the node binds and announces on.
isNewerThan(PaintOp) - Method in class protocols.apps.canvas.PaintOp: Total, deterministic last-writer-wins order: this op beats other iff it has a strictly higher timestamp, or an equal timestamp and a greater originId, or equal on both and a greater opId.
isUiEnabled() - Method in class protocols.apps.canvas.CanvasApp

M

main(String[]) - Static method in class Main
Main - Class in Unnamed Package: Entry point for babel-canvas — a peer-to-peer collaborative pixel canvas.
Main() - Constructor for class Main
mergeSnapshot(List<PaintOp>) - Method in class protocols.apps.canvas.PixelCanvas: Merge a peer's snapshot into this canvas under LWW.
MSG_ID - Static variable in class protocols.apps.canvas.messages.CanvasSyncMessage

N

neighborDown(String, int) - Method in class protocols.apps.canvas.telemetry.Telemetry
neighborUp(String, int) - Method in class protocols.apps.canvas.telemetry.Telemetry

P

paintedCount() - Method in class protocols.apps.canvas.PixelCanvas: Number of cells that have been painted at least once.
paintFromUi(int, int, int) - Method in class protocols.apps.canvas.CanvasApp: Paint a cell from the web UI.
PaintOp - Class in protocols.apps.canvas: A single paint operation: "cell (x,y) becomes colour argb".
PaintOp(int, int, int, long, String, UUID) - Constructor for class protocols.apps.canvas.PaintOp
paintStart(int, long, String) - Method in class protocols.apps.canvas.telemetry.Telemetry: The local node began its paint workload.
PAR_ANTIENTROPY_ENABLED - Static variable in class Main: Property key — load and wire the anti-entropy reconciliation protocol.
PAR_DEFAULT_BABEL_PORT - Static variable in class Main: Default value for the TCP port (Babel.PAR_DEFAULT_PORT, i.e.
PAR_DIGEST_INTERVAL - Static variable in class protocols.apps.canvas.CanvasApp: Property key — period (ms) between convergence-digest telemetry lines; <= 0 disables.
PAR_HEIGHT - Static variable in class protocols.apps.canvas.CanvasApp: Property key — shared grid height in cells.
PAR_SNAPSHOT_SYNC - Static variable in class protocols.apps.canvas.CanvasApp: Property key — request a canvas snapshot from a neighbour on join.
PAR_UI_ENABLED - Static variable in class protocols.apps.canvas.CanvasApp: Property key — enable the embedded web UI.
PAR_UI_OPEN - Static variable in class protocols.apps.canvas.CanvasApp: Property key — open the system browser at the UI on startup (best-effort).
PAR_UI_PORT - Static variable in class protocols.apps.canvas.CanvasApp: Property key — web UI port.
PAR_WIDTH - Static variable in class protocols.apps.canvas.CanvasApp: Property key — shared grid width in cells.
PAR_WORKLOAD_CONTROL_FILE - Static variable in class protocols.apps.canvas.CanvasApp: Property key — shared control file (RUN/STOP) the experiment script drives; empty = legacy timer mode.
PAR_WORKLOAD_CONTROL_POLL_MS - Static variable in class protocols.apps.canvas.CanvasApp: Property key — how often (ms) to poll the control file in coordinated mode.
PAR_WORKLOAD_DURATION - Static variable in class protocols.apps.canvas.CanvasApp: Property key — how long (ms) to keep painting; <= 0 = until stopped.
PAR_WORKLOAD_ENABLED - Static variable in class protocols.apps.canvas.CanvasApp: Property key — enable the headless random-paint workload driver.
PAR_WORKLOAD_RATE - Static variable in class protocols.apps.canvas.CanvasApp: Property key — workload paint operations per second.
PAR_WORKLOAD_START_DELAY - Static variable in class protocols.apps.canvas.CanvasApp: Property key — delay (ms) before the first workload paint, to let the overlay form.
PixelCanvas - Class in protocols.apps.canvas: The shared pixel grid: one PaintOp winner per cell under last-writer-wins (see PaintOp.isNewerThan(protocols.apps.canvas.PaintOp)).
PixelCanvas(int, int) - Constructor for class protocols.apps.canvas.PixelCanvas
PROTO_ID - Static variable in class protocols.apps.canvas.CanvasApp
PROTO_NAME - Static variable in class protocols.apps.canvas.CanvasApp
protocols.apps.canvas - package protocols.apps.canvas
protocols.apps.canvas.messages - package protocols.apps.canvas.messages
protocols.apps.canvas.telemetry - package protocols.apps.canvas.telemetry
protocols.apps.canvas.timers - package protocols.apps.canvas.timers
protocols.apps.canvas.ui - package protocols.apps.canvas.ui

R

readFrom(DataInputStream) - Static method in class protocols.apps.canvas.PaintOp: Read one op previously written by PaintOp.writeTo(java.io.DataOutputStream).
REPLY - Enum constant in enum class protocols.apps.canvas.messages.CanvasSyncMessage.Kind
REQUEST - Enum constant in enum class protocols.apps.canvas.messages.CanvasSyncMessage.Kind
resolveBindAddress(Properties) - Static method in class utils.InterfaceToIp: Resolve the process-wide bind address into babel.address (see the class javadoc for the precedence).

S

serializer - Static variable in class protocols.apps.canvas.messages.CanvasSyncMessage
snapshotArgb() - Method in class protocols.apps.canvas.PixelCanvas: The grid as a row-major array of ARGB colours, PixelCanvas.EMPTY for unpainted cells.
snapshotOps() - Method in class protocols.apps.canvas.PixelCanvas: All current winning ops (one per painted cell) — used to seed a joining peer.
start() - Method in class protocols.apps.canvas.ui.WebUi: Bind and start serving.
start(int, int, String, int, boolean) - Method in class protocols.apps.canvas.telemetry.Telemetry: Once at startup: records this node's identity and the run's key parameters.
stateJson() - Method in class protocols.apps.canvas.CanvasApp: A JSON snapshot of canvas + neighbours for the web UI's polling loop.
stop() - Method in class protocols.apps.canvas.ui.WebUi
syncMerge(String, int, int, int) - Method in class protocols.apps.canvas.telemetry.Telemetry: This node merged a snapshot reply from from: ops ops received, applied of them won LWW (state this node obtained by reconciliation rather than gossip — invisible to the delivered counter and DELIVER lines).
syncRequest(String) - Method in class protocols.apps.canvas.telemetry.Telemetry: This node asked peer for a canvas snapshot (point-to-point, once it has a neighbour).
syncServe(String, int) - Method in class protocols.apps.canvas.telemetry.Telemetry: This node served its canvas snapshot (ops winning ops) to to.

T

Telemetry - Class in protocols.apps.canvas.telemetry: Structured, machine-readable event emitter — the data contract between the canvas demo and the babel-canvas-experiments correctness harness.
Telemetry(String) - Constructor for class protocols.apps.canvas.telemetry.Telemetry
TIMER_ID - Static variable in class protocols.apps.canvas.timers.ControlTimer
TIMER_ID - Static variable in class protocols.apps.canvas.timers.DigestTimer
TIMER_ID - Static variable in class protocols.apps.canvas.timers.WorkloadTimer
toString() - Method in class protocols.apps.canvas.PaintOp

U

utils - package utils

V

valueOf(String) - Static method in enum class protocols.apps.canvas.messages.CanvasSyncMessage.Kind: Returns the enum constant of this class with the specified name.
values() - Static method in enum class protocols.apps.canvas.messages.CanvasSyncMessage.Kind: Returns an array containing the constants of this enum class, in the order they are declared.

W

WebUi - Class in protocols.apps.canvas.ui: A tiny embedded web UI for the canvas, built on the JDK's bundled HttpServer so the demo pulls in no HTTP dependency.
WebUi(int, CanvasApp) - Constructor for class protocols.apps.canvas.ui.WebUi
workloadStop(long) - Method in class protocols.apps.canvas.telemetry.Telemetry: The local node stopped generating paint ops — on the script's STOP (or the in-node duration safety-cap), before the drain window.
WorkloadTimer - Class in protocols.apps.canvas.timers: Fires at the configured paint rate to make CanvasApp generate one random paint operation in headless workload mode (see CanvasApp.uponWorkloadTimer).
WorkloadTimer() - Constructor for class protocols.apps.canvas.timers.WorkloadTimer
writeTo(DataOutputStream) - Method in class protocols.apps.canvas.PaintOp: Append this op to out (see PaintOp.readFrom(java.io.DataInputStream) for the inverse).

A B C D E G I M N P R S T U V W
All Classes and Interfaces|All Packages|Constant Field Values