faastjs
Version:
Serverless batch computing made simple.
177 lines • 25.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.receiveMessages = exports.processAwsErrorMessage = exports.createSQSQueue = exports.publishFunctionCallMessage = exports.sendResponseQueueMessage = exports.createSNSTopic = void 0;
const abort_controller_1 = require("@aws-sdk/abort-controller");
const error_1 = require("../error");
const log_1 = require("../log");
const serialize_1 = require("../serialize");
const shared_1 = require("../shared");
const throttle_1 = require("../throttle");
const wrapper_1 = require("../wrapper");
async function createSNSTopic(sns, Name) {
const topic = await sns.createTopic({ Name });
return topic.TopicArn;
}
exports.createSNSTopic = createSNSTopic;
function countRequests(bytes) {
return Math.ceil(bytes / (64 * 1024));
}
async function sendResponseQueueMessage(sqs, QueueUrl, message, cc) {
try {
const request = { QueueUrl, MessageBody: (0, serialize_1.serialize)(message) };
const len = request.MessageBody.length;
if (len > 262144) {
throw new Error(`Response length (${len} bytes) exceeds limit of 256KiB`);
}
await sqs.sendMessage(request);
}
catch (err) {
log_1.log.warn(`sendResponseQueueMessage failed: ${err}`);
const errorResponse = (0, wrapper_1.createErrorResponse)(err, cc);
const errorRequest = { QueueUrl, MessageBody: (0, serialize_1.serialize)(errorResponse) };
try {
await sqs.sendMessage(errorRequest);
}
catch (errorResponseError) {
log_1.log.warn(`Error sending error response to response queue: ${errorResponseError}`);
}
}
}
exports.sendResponseQueueMessage = sendResponseQueueMessage;
function publishFunctionCallMessage(sns, TopicArn, message, metrics) {
const serialized = (0, serialize_1.serialize)(message);
metrics.sns64kRequests += countRequests(serialized.length);
return (0, throttle_1.retryOp)((err, n) => n < 6 && err?.message?.match(/does not exist/), () => sns.publish({ TopicArn, Message: serialized }));
}
exports.publishFunctionCallMessage = publishFunctionCallMessage;
async function createSQSQueue(QueueName, VTimeout, sqs) {
try {
const createQueueRequest = {
QueueName,
Attributes: {
VisibilityTimeout: `${VTimeout}`
}
};
const response = await sqs.createQueue(createQueueRequest);
const QueueUrl = response.QueueUrl;
const arnResponse = await sqs.getQueueAttributes({
QueueUrl,
AttributeNames: ["QueueArn"]
});
const QueueArn = arnResponse.Attributes?.QueueArn;
return { QueueUrl, QueueArn };
}
catch (err) {
throw new error_1.FaastError(err, "create sqs queue");
}
}
exports.createSQSQueue = createSQSQueue;
/* c8 ignore next */
function processAwsErrorMessage(message) {
let err = new error_1.FaastError(message);
if (message?.match(/Process exited before completing/) ||
message?.match(/signal: killed/) ||
message?.match(/Runtime exited/)) {
err = new error_1.FaastError({ cause: err, name: error_1.FaastErrorNames.EMEMORY }, "possibly out of memory");
}
else if (message?.match(/time/)) {
err = new error_1.FaastError({ cause: err, name: error_1.FaastErrorNames.ETIMEOUT }, "timeout");
}
else if (message?.match(/EventAgeExceeded/)) {
err = new error_1.FaastError({ cause: err, name: error_1.FaastErrorNames.ECONCURRENCY }, "concurrency limit exceeded");
}
return err;
}
exports.processAwsErrorMessage = processAwsErrorMessage;
async function receiveMessages(sqs, ResponseQueueUrl, metrics, cancel) {
try {
const MaxNumberOfMessages = 10;
const abortController = new abort_controller_1.AbortController();
const request = sqs.receiveMessage({
QueueUrl: ResponseQueueUrl,
WaitTimeSeconds: 20,
MaxNumberOfMessages,
MessageAttributeNames: ["All"],
AttributeNames: ["SentTimestamp"]
}, { abortSignal: abortController.signal });
const response = await Promise.race([request, cancel]);
if (!response) {
abortController.abort();
return { Messages: [] };
}
const { Messages = [] } = response;
const receivedBytes = Messages.reduce((sum, m) => sum + (m.Body?.length ?? 0), 0);
metrics.outboundBytes += receivedBytes;
const inferredSqsRequestsReceived = countRequests(receivedBytes);
// Each request is counted as both sent and received.
metrics.sqs64kRequests += inferredSqsRequestsReceived * 2;
if (Messages.length > 0) {
sqs.deleteMessageBatch({
QueueUrl: ResponseQueueUrl,
Entries: Messages.map(m => ({
Id: m.MessageId,
ReceiptHandle: m.ReceiptHandle
}))
}).catch(_ => { });
metrics.sqs64kRequests++;
}
return {
Messages: Messages.map(processIncomingQueueMessage).filter(shared_1.defined),
isFullMessageBatch: Messages.length === MaxNumberOfMessages
};
}
catch (err) {
throw new error_1.FaastError(err, "receiveMessages");
}
}
exports.receiveMessages = receiveMessages;
function processIncomingQueueMessage(m) {
// AWS Lambda Destinations
// (https://aws.amazon.com/blogs/compute/introducing-aws-lambda-destinations/)
// are used to route failures to the response queue. These
// messages are generated by AWS Lambda and are constrained to the format it
// provides.
const raw = (0, serialize_1.deserialize)(m.Body);
if (raw.responseContext) {
const message = raw;
const snsMessage = message.requestPayload;
const record = snsMessage.Records[0];
const sCall = (0, serialize_1.deserialize)(record.Sns.Message);
let error;
const destinationError = message.responsePayload;
if (destinationError) {
error = processAwsErrorMessage(destinationError.errorMessage);
error.stack = destinationError.stackTrace?.join("\n");
}
else {
error = processAwsErrorMessage(message.requestContext.condition);
}
const executionId = message.requestContext.requestId;
return {
...(0, wrapper_1.createErrorResponse)(error, {
call: sCall,
startTime: new Date(record.Sns.Timestamp).getTime(),
executionId
}),
timestamp: new Date(message.timestamp).getTime()
};
}
else {
const message = raw;
switch (message.kind) {
case "promise":
case "iterator":
message.timestamp = Number(m.Attributes.SentTimestamp);
break;
case "cpumetrics":
break;
case "functionstarted":
break;
default: {
console.warn(`Unknown message received from response queue`);
}
}
return raw;
}
}
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{ AbortController } from \"@aws-sdk/abort-controller\";\nimport { SNS } from \"@aws-sdk/client-sns\";\nimport { CreateQueueRequest, SQS, Message as SQSMessage } from \"@aws-sdk/client-sqs\";\nimport { SNSEvent } from \"aws-lambda/trigger/sns\";\nimport { FaastError, FaastErrorNames } from \"../error\";\nimport { log } from \"../log\";\nimport { Message, PollResult } from \"../provider\";\nimport { deserialize, serialize } from \"../serialize\";\nimport { defined } from \"../shared\";\nimport { retryOp } from \"../throttle\";\nimport { CallingContext, FunctionCall, createErrorResponse } from \"../wrapper\";\nimport { AwsMetrics } from \"./aws-faast\";\n\nexport async function createSNSTopic(sns: SNS, Name: string) {\n    const topic = await sns.createTopic({ Name });\n    return topic.TopicArn!;\n}\n\nfunction countRequests(bytes: number) {\n    return Math.ceil(bytes / (64 * 1024));\n}\n\nexport async function sendResponseQueueMessage(\n    sqs: SQS,\n    QueueUrl: string,\n    message: Message,\n    cc: CallingContext\n) {\n    try {\n        const request = { QueueUrl, MessageBody: serialize(message) };\n        const len = request.MessageBody.length;\n        if (len > 262144) {\n            throw new Error(`Response length (${len} bytes) exceeds limit of 256KiB`);\n        }\n        await sqs.sendMessage(request);\n    } catch (err) {\n        log.warn(`sendResponseQueueMessage failed: ${err}`);\n        const errorResponse = createErrorResponse(err, cc);\n        const errorRequest = { QueueUrl, MessageBody: serialize(errorResponse) };\n        try {\n            await sqs.sendMessage(errorRequest);\n        } catch (errorResponseError: any) {\n            log.warn(\n                `Error sending error response to response queue: ${errorResponseError}`\n            );\n        }\n    }\n}\n\nexport function publishFunctionCallMessage(\n    sns: SNS,\n    TopicArn: string,\n    message: FunctionCall,\n    metrics: AwsMetrics\n) {\n    const serialized = serialize(message);\n    metrics.sns64kRequests += countRequests(serialized.length);\n    return retryOp(\n        (err, n) => n < 6 && err?.message?.match(/does not exist/),\n        () => sns.publish({ TopicArn, Message: serialized })\n    );\n}\n\nexport async function createSQSQueue(QueueName: string, VTimeout: number, sqs: SQS) {\n    try {\n        const createQueueRequest: CreateQueueRequest = {\n            QueueName,\n            Attributes: {\n                VisibilityTimeout: `${VTimeout}`\n            }\n        };\n        const response = await sqs.createQueue(createQueueRequest);\n        const QueueUrl = response.QueueUrl!;\n        const arnResponse = await sqs.getQueueAttributes({\n            QueueUrl,\n            AttributeNames: [\"QueueArn\"]\n        });\n        const QueueArn = arnResponse.Attributes?.QueueArn;\n        return { QueueUrl, QueueArn };\n    } catch (err: any) {\n        throw new FaastError(err, \"create sqs queue\");\n    }\n}\n\n/* c8 ignore next  */\nexport function processAwsErrorMessage(message?: string): Error {\n    let err = new FaastError(message);\n    if (\n        message?.match(/Process exited before completing/) ||\n        message?.match(/signal: killed/) ||\n        message?.match(/Runtime exited/)\n    ) {\n        err = new FaastError(\n            { cause: err, name: FaastErrorNames.EMEMORY },\n            \"possibly out of memory\"\n        );\n    } else if (message?.match(/time/)) {\n        err = new FaastError({ cause: err, name: FaastErrorNames.ETIMEOUT }, \"timeout\");\n    } else if (message?.match(/EventAgeExceeded/)) {\n        err = new FaastError(\n            { cause: err, name: FaastErrorNames.ECONCURRENCY },\n            \"concurrency limit exceeded\"\n        );\n    }\n    return err;\n}\n\nexport async function receiveMessages(\n    sqs: SQS,\n    ResponseQueueUrl: string,\n    metrics: AwsMetrics,\n    cancel: Promise<void>\n): Promise<PollResult> {\n    try {\n        const MaxNumberOfMessages = 10;\n        const abortController = new AbortController();\n        const request = sqs.receiveMessage(\n            {\n                QueueUrl: ResponseQueueUrl!,\n                WaitTimeSeconds: 20,\n                MaxNumberOfMessages,\n                MessageAttributeNames: [\"All\"],\n                AttributeNames: [\"SentTimestamp\"]\n            },\n            { abortSignal: abortController.signal }\n        );\n        const response = await Promise.race([request, cancel]);\n        if (!response) {\n            abortController.abort();\n            return { Messages: [] };\n        }\n\n        const { Messages = [] } = response;\n        const receivedBytes = Messages.reduce((sum, m) => sum + (m.Body?.length ?? 0), 0);\n        metrics.outboundBytes += receivedBytes;\n        const inferredSqsRequestsReceived = countRequests(receivedBytes);\n        // Each request is counted as both sent and received.\n        metrics.sqs64kRequests += inferredSqsRequestsReceived * 2;\n\n        if (Messages.length > 0) {\n            sqs.deleteMessageBatch({\n                QueueUrl: ResponseQueueUrl!,\n                Entries: Messages.map(m => ({\n                    Id: m.MessageId!,\n                    ReceiptHandle: m.ReceiptHandle!\n                }))\n            }).catch(_ => {});\n            metrics.sqs64kRequests++;\n        }\n        return {\n            Messages: Messages.map(processIncomingQueueMessage).filter(defined),\n            isFullMessageBatch: Messages.length === MaxNumberOfMessages\n        };\n    } catch (err: any) {\n        throw new FaastError(err, \"receiveMessages\");\n    }\n}\n\ninterface LambdaDestinationError {\n    errorMessage: string;\n    errorType?: string;\n    stackTrace?: string[];\n}\n\ninterface LambdaDestinationMessage {\n    version: string;\n    timestamp: string;\n    requestContext: {\n        requestId: string;\n        functionArn: string;\n        condition: \"RetriesExhausted\" | \"Success\";\n        approximateInvokeCount: number;\n    };\n    requestPayload: object;\n    responseContext: {\n        statusCode: number;\n        executedVersion: string;\n        functionError?: string;\n    };\n    responsePayload: LambdaDestinationError | object;\n}\n\nfunction processIncomingQueueMessage(m: SQSMessage): Message | void {\n    // AWS Lambda Destinations\n    // (https://aws.amazon.com/blogs/compute/introducing-aws-lambda-destinations/)\n    // are used to route failures to the response queue. These\n    // messages are generated by AWS Lambda and are constrained to the format it\n    // provides.\n    const raw = deserialize(m.Body!);\n    if (raw.responseContext) {\n        const message = raw as LambdaDestinationMessage;\n        const snsMessage = message.requestPayload as SNSEvent;\n        const record = snsMessage.Records[0];\n        const sCall: FunctionCall = deserialize(record.Sns.Message);\n        let error: Error | undefined;\n        const destinationError = message.responsePayload as LambdaDestinationError;\n        if (destinationError) {\n            error = processAwsErrorMessage(destinationError.errorMessage);\n            error.stack = destinationError.stackTrace?.join(\"\\n\");\n        } else {\n            error = processAwsErrorMessage(message.requestContext.condition);\n        }\n        const executionId = message.requestContext.requestId;\n        return {\n            ...createErrorResponse(error, {\n                call: sCall,\n                startTime: new Date(record.Sns.Timestamp).getTime(),\n                executionId\n            }),\n            timestamp: new Date(message.timestamp).getTime()\n        };\n    } else {\n        const message = raw as Message;\n        switch (message.kind) {\n            case \"promise\":\n            case \"iterator\":\n                message.timestamp = Number(m.Attributes!.SentTimestamp);\n                break;\n            case \"cpumetrics\":\n                break;\n            case \"functionstarted\":\n                break;\n            default: {\n                console.warn(`Unknown message received from response queue`);\n            }\n        }\n        return raw;\n    }\n}\n"]}