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backend/node_modules/@electric-sql/pglite-socket/examples/basic-server.ts

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+import { PGLiteSocketServer } from '../src'
+import { PGlite, DebugLevel } from '@electric-sql/pglite'
+
+/*
+ * This is a basic example of how to use the PGLiteSocketServer class.
+ * It creates a PGlite instance and a PGLiteSocketServer instance and starts the server.
+ * It also handles SIGINT to stop the server and close the database.
+ * You can run this example with the following command:
+ *
+ * ```bash
+ * pnpm tsx examples/basic-server.ts
+ * ```
+ * or with the handy script:
+ * ```bash
+ * pnpm example:basic-server
+ * ```
+ *
+ * You can set the host and port with the following environment variables:
+ *
+ * ```bash
+ * HOST=127.0.0.1 PORT=5432 DEBUG=1 pnpm tsx examples/basic-server.ts
+ * ```
+ *
+ * Debug level can be set to 0, 1, 2, 3, or 4.
+ *
+ * ```bash
+ * DEBUG=1 pnpm tsx examples/basic-server.ts
+ * ```
+ * You can also use a UNIX socket instead of the host:port
+ * 
+ * ```bash
+ * UNIX=/tmp/.s.PGSQL.5432 DEBUG=1 pnpm tsx examples/basic-server.ts
+ * ```
+ */
+
+const UNIX = process.env.UNIX
+const PORT = process.env.PORT ? parseInt(process.env.PORT) : 5432
+const HOST = process.env.HOST ?? '127.0.0.1'
+const DEBUG = process.env.DEBUG
+  ? (parseInt(process.env.DEBUG) as DebugLevel)
+  : 0
+
+// Create a PGlite instance
+const db = await PGlite.create({
+  debug: DEBUG,
+})
+
+// Check if the database is working
+console.log(await db.query('SELECT version()'))
+
+// Create a PGLiteSocketServer instance
+const server = new PGLiteSocketServer({
+  db,
+  port: PORT,
+  host: HOST,
+  path: UNIX,
+  inspect: !!DEBUG, // Print the incoming and outgoing data to the console
+})
+
+server.addEventListener('listening', (event) => {
+  const detail = (
+    event as CustomEvent<{ port: number; host: string } | { host: string }>
+  ).detail
+  console.log(`Server listening on ${JSON.stringify(detail)}`)
+})
+
+// Start the server
+await server.start()
+
+// Handle SIGINT to stop the server and close the database
+process.on('SIGINT', async () => {
+  await server.stop()
+  await db.close()
+  console.log('Server stopped and database closed')
+  process.exit(0)
+})