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November 17, 2024 20:43
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| <html> | |
| <head> | |
| <script type="module" src="https://cdn.jsdelivr.net/npm/@finos/perspective/dist/cdn/perspective.js"></script> | |
| <script type="module" src="https://cdn.jsdelivr.net/npm/@finos/perspective-viewer/dist/cdn/perspective-viewer.js"></script> | |
| <script type="module" src="https://cdn.jsdelivr.net/npm/@finos/perspective-viewer-datagrid/dist/cdn/perspective-viewer-datagrid.js"></script> | |
| <script type="module" src="https://cdn.jsdelivr.net/npm/@finos/perspective-viewer-d3fc/dist/cdn/perspective-viewer-d3fc.js"></script> | |
| <link rel="stylesheet" crossorigin="anonymous" href="https://cdn.jsdelivr.net/npm/@finos/perspective-viewer/dist/css/pro.css"/> | |
| <style> | |
| perspective-viewer { | |
| position: absolute; | |
| top: 0; | |
| bottom: 0; | |
| left: 0; | |
| right: 0; | |
| display: flex; | |
| flex-direction: column; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <perspective-viewer id="viewer"></perspective-viewer> | |
| </body> | |
| <script type="module"> | |
| import perspective from "https://cdn.jsdelivr.net/npm/@finos/perspective/dist/cdn/perspective.js"; | |
| window.addEventListener("DOMContentLoaded", async function () { | |
| const websocket = await perspective.websocket("ws://localhost:8000/websocket"); | |
| const worker = perspective.worker(); | |
| await document.getElementById("viewer").load(websocket.open_table("test")); | |
| }); | |
| </script> | |
| </html> |
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| Example of perspective multiworker webserver (independent perspective instances) | |
| ```bash | |
| uvicorn server:app --workers 4 | |
| ``` |
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| import asyncio | |
| import random | |
| from fastapi import FastAPI, WebSocket | |
| from perspective import Server | |
| from perspective.handlers.starlette import PerspectiveStarletteHandler | |
| from starlette.staticfiles import StaticFiles | |
| loop = asyncio.get_event_loop() | |
| app = FastAPI() | |
| perspective_server = Server() | |
| async def websocket_handler(websocket: WebSocket): | |
| await PerspectiveStarletteHandler(perspective_server=perspective_server, websocket=websocket).run() | |
| app.add_api_websocket_route("/websocket", websocket_handler) | |
| app.mount("/", StaticFiles(directory=".", html=True), name="static") | |
| async def feed(table): | |
| while True: | |
| table.update([{"a": random.randint(0, 10), "index": 1}]) | |
| await asyncio.sleep(0.1) | |
| @app.on_event("startup") | |
| def startup(): | |
| client = perspective_server.new_local_client(loop_callback=asyncio.get_event_loop().call_soon_threadsafe) | |
| table = client.table({"a": "integer", "index": "integer"}, index="index", name="test") | |
| loop.create_task(feed(table)) |
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