added aws lambda adapter + improvements to handle concurrency

examples/aws-lambda/clean.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# Set variables
+FUNCTION_NAME="bknd-lambda"
+ROLE_NAME="bknd-lambda-execution-role"
+
+echo "Starting cleanup of AWS resources..."
+
+# Delete Function URL if it exists
+echo "Checking if Function URL exists for '$FUNCTION_NAME'..."
+FUNCTION_URL=$(aws lambda get-function-url-config --function-name $FUNCTION_NAME --query "FunctionUrl" --output text 2>/dev/null)
+
+if [ -n "$FUNCTION_URL" ]; then
+  echo "Deleting Function URL for '$FUNCTION_NAME'..."
+  aws lambda delete-function-url-config --function-name $FUNCTION_NAME
+  echo "Function URL deleted."
+else
+  echo "No Function URL found for '$FUNCTION_NAME'."
+fi
+
+# Delete Lambda function if it exists
+echo "Checking if Lambda function '$FUNCTION_NAME' exists..."
+LAMBDA_EXISTS=$(aws lambda get-function --function-name $FUNCTION_NAME --query "Configuration.FunctionArn" --output text 2>/dev/null)
+
+if [ -n "$LAMBDA_EXISTS" ]; then
+  echo "Deleting Lambda function '$FUNCTION_NAME'..."
+  aws lambda delete-function --function-name $FUNCTION_NAME
+  echo "Lambda function deleted."
+else
+  echo "Lambda function '$FUNCTION_NAME' does not exist."
+fi
+
+# Delete IAM role and attached policies if role exists
+echo "Checking if IAM role '$ROLE_NAME' exists..."
+ROLE_EXISTS=$(aws iam get-role --role-name $ROLE_NAME --query "Role.Arn" --output text 2>/dev/null)
+
+if [ -n "$ROLE_EXISTS" ]; then
+  echo "Detaching policies from IAM role '$ROLE_NAME'..."
+  ATTACHED_POLICIES=$(aws iam list-attached-role-policies --role-name $ROLE_NAME --query "AttachedPolicies[].PolicyArn" --output text)
+
+  for POLICY_ARN in $ATTACHED_POLICIES; do
+    aws iam detach-role-policy --role-name $ROLE_NAME --policy-arn $POLICY_ARN
+    echo "Detached policy: $POLICY_ARN"
+  done
+
+  echo "Deleting IAM role '$ROLE_NAME'..."
+  aws iam delete-role --role-name $ROLE_NAME
+  echo "IAM role deleted."
+else
+  echo "IAM role '$ROLE_NAME' does not exist."
+fi
+
+echo "AWS resource cleanup completed successfully!"

examples/aws-lambda/deploy.sh

@@ -0,0 +1,131 @@
+#!/bin/bash
+
+# Set variables
+FUNCTION_NAME="bknd-lambda"
+ROLE_NAME="bknd-lambda-execution-role"
+RUNTIME="nodejs22.x"
+HANDLER="index.handler"
+ARCHITECTURE="arm64" # or "x86_64"
+MEMORY="1024" # in MB, 128 is the minimum
+TIMEOUT="30"
+ENTRY_FILE="index.mjs"
+ZIP_FILE="lambda.zip"
+
+# Build step
+echo "Building Lambda package..."
+rm -rf dist && mkdir dist
+
+# copy assets
+node_modules/.bin/bknd copy-assets --out=dist/static
+
+# Run esbuild and check for errors
+# important to use --platform=browser for libsql dependency (otherwise we need to push node_modules)
+if ! npx esbuild $ENTRY_FILE --bundle --format=cjs --platform=browser --external:fs --minify --outfile=dist/index.js; then
+  echo "Error: esbuild failed to build the package"
+  exit 1
+fi
+
+# zip
+( cd dist && zip -r $ZIP_FILE . )
+
+# Read .env file and export variables
+if [ -f .env ]; then
+  export $(grep -v '^#' .env | xargs)
+else
+  echo ".env file not found!"
+  exit 1
+fi
+
+# Prepare environment variables string for Lambda
+ENV_VARS=$(awk -F= '{printf "%s=\"%s\",", $1, $2}' .env | sed 's/,$//')
+
+# Create a trust policy file for the Lambda execution role
+cat > trust-policy.json << EOL
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Principal": {
+        "Service": "lambda.amazonaws.com"
+      },
+      "Action": "sts:AssumeRole"
+    }
+  ]
+}
+EOL
+
+# Create IAM role if it doesn't exist
+ROLE_ARN=$(aws iam get-role --role-name $ROLE_NAME --query "Role.Arn" --output text 2>/dev/null)
+
+if [ -z "$ROLE_ARN" ]; then
+  echo "Creating IAM role..."
+  aws iam create-role --role-name $ROLE_NAME --assume-role-policy-document file://trust-policy.json
+  aws iam attach-role-policy --role-name $ROLE_NAME --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
+
+  # Wait for IAM role to propagate
+  echo "Waiting for IAM role to propagate..."
+  sleep 10
+
+  # Get the role ARN after creation
+  ROLE_ARN=$(aws iam get-role --role-name $ROLE_NAME --query "Role.Arn" --output text)
+else
+  echo "Using existing IAM role: $ROLE_ARN"
+fi
+
+# Create or update Lambda function
+echo "Creating or updating Lambda function..."
+LAMBDA_ARN=$(aws lambda get-function --function-name $FUNCTION_NAME --query "Configuration.FunctionArn" --output text 2>/dev/null)
+
+if [ -z "$LAMBDA_ARN" ]; then
+  echo "Creating new Lambda function..."
+  aws lambda create-function \
+    --function-name $FUNCTION_NAME \
+    --zip-file fileb://dist/$ZIP_FILE \
+    --handler $HANDLER \
+    --runtime $RUNTIME \
+    --role $ROLE_ARN \
+    --architectures $ARCHITECTURE \
+    --memory-size $MEMORY \
+    --timeout $TIMEOUT \
+    --environment Variables="{$ENV_VARS}"
+else
+  echo "Updating existing Lambda function..."
+  aws lambda update-function-code --function-name $FUNCTION_NAME --zip-file fileb://dist/$ZIP_FILE
+
+  echo "Waiting for Lambda function to become active..."
+  aws lambda wait function-updated --function-name $FUNCTION_NAME
+
+  # Update function configuration, including env variables
+  aws lambda update-function-configuration \
+    --function-name $FUNCTION_NAME \
+    --memory-size $MEMORY \
+    --timeout $TIMEOUT \
+    --environment Variables="{$ENV_VARS}"
+fi
+
+# Check if Function URL exists, if not create it
+echo "Checking if Function URL exists..."
+FUNCTION_URL=$(aws lambda get-function-url-config --function-name $FUNCTION_NAME --query "FunctionUrl" --output text 2>/dev/null)
+
+if [ -z "$FUNCTION_URL" ]; then
+  echo "Creating Function URL..."
+  FUNCTION_URL=$(aws lambda create-function-url-config \
+    --function-name $FUNCTION_NAME \
+    --auth-type NONE \
+    --query "FunctionUrl" --output text)
+
+  # Make the Function URL publicly accessible (log output)
+  aws lambda add-permission \
+    --function-name $FUNCTION_NAME \
+    --action lambda:InvokeFunctionUrl \
+    --principal "*" \
+    --statement-id public-access \
+    --function-url-auth-type NONE
+
+  echo "Created Lambda Function URL: $FUNCTION_URL"
+else
+  echo "Lambda Function URL: $FUNCTION_URL"
+fi
+
+echo "Deployment completed successfully!"

examples/aws-lambda/index.mjs

@@ -0,0 +1,14 @@
+import { serveLambda } from "bknd/adapter/aws";
+
+export const handler = serveLambda({
+   // to get local assets, run `npx bknd copy-assets`
+   // this is automatically done in `deploy.sh`
+   assets: {
+      mode: "local",
+      root: "./static",
+   },
+   connection: {
+      url: process.env.DB_URL,
+      authToken: process.env.DB_TOKEN,
+   },
+});

examples/aws-lambda/package.json

@@ -0,0 +1,21 @@
+{
+   "name": "aws-lambda",
+   "version": "1.0.0",
+   "main": "index.mjs",
+   "scripts": {
+      "test": "esbuild index.mjs --bundle --format=cjs --platform=node --external:fs --outfile=dist/index.js && node test.js",
+      "deploy": "./deploy.sh",
+      "clean": "./clean.sh"
+   },
+   "keywords": [],
+   "author": "",
+   "license": "ISC",
+   "description": "",
+   "dependencies": {
+      "bknd": "file:../../app/bknd-0.9.0-rc.1-11.tgz"
+   },
+   "devDependencies": {
+      "esbuild": "^0.25.0",
+      "dotenv": "^16.4.7"
+   }
+}

examples/aws-lambda/test.js

@@ -0,0 +1,31 @@
+require("dotenv").config();
+const handler = require("./dist/index.js").handler;
+
+const event = {
+   httpMethod: "GET",
+   path: "/",
+   //path: "/api/system/config",
+   //path: "/assets/main-B6sEDlfs.js",
+   headers: {
+      //"Content-Type": "application/json",
+      "User-Agent": "curl/7.64.1",
+      Accept: "*/*",
+   },
+};
+
+const context = {
+   awsRequestId: "mocked-request-id",
+   functionName: "myMinimalLambda",
+   functionVersion: "$LATEST",
+   memoryLimitInMB: "128",
+   getRemainingTimeInMillis: () => 5000,
+};
+
+// Execute the handler
+handler(event, context)
+   .then((response) => {
+      console.log(response.statusCode, response.body);
+   })
+   .catch((error) => {
+      console.error("Error:", error);
+   });

examples/aws-lambda/trust-policy.json

@@ -0,0 +1,12 @@
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Principal": {
+        "Service": "lambda.amazonaws.com"
+      },
+      "Action": "sts:AssumeRole"
+    }
+  ]
+}