@qrvey/event-broker

The @qrvey/event-broker package provides a unified interface for work with AWS SQS, AWS EventBridge and RabbitMQ based on the specific configurations of the service.

Installation

You can install the package using npm or yarn:

npm install @qrvey/event-broker

Or with yarn:

yarn add @qrvey/event-broker

Note: If the application does not have @aws-sdk/aws-sdk/client-sqs, @aws-sdk/client-eventbridge, @smithy/node-http-handler and @smithy/middleware-retry it must be installed manually to work with AWS SQS, AWS EventBridge and amqplib to work with RabbitMQ

Require environment variables

AWS_ACCOUNT_ID; //AWS AccountId to send SQS service
AWS_DEFAULT_REGION; //AWS Region for SQS service
AWS_ACCESS_KEY_ID; //AWS Access key for Event Bridge service
AWS_SECRET_ACCESS_KEY; //AWS Secret key for Event Bridge service
RABBITMQ_HOST; //RabbitMQ host
RABBITMQ_USER; //RabbitMQ user
RABBITMQ_PASSWORD; //RabbitMQ password
RABBITMQ_PORT; //RabbitMQ port
PLATFORM_TYPE; //Platform type (possible value CONTAINER)

No-require environment variables

AWS_EVENT_BUS_NAME; //AWS Event Bus name, if it is not set, you will need to defined every bus name in the code for each message.

Conditions for AWS SQS or RA

@qrvey/event-broker [QueueService] package can deliver message either to AWS SQS or RabbitMQ, depending on certain conditions. These conditions are determined by:

1. AWS SQS:

   • If the environment variable PLATFORM_TYPE is not set or have a different value to 'CONTAINER'.

2. RabbitMQ:

   • If the environment variable PLATFORM_TYPE is set to 'CONTAINER'.

Usage Example

const { QueueService } = require('@qrvey/event-broker');

const queueSchema = {
    name: 'MY_SAMPLE_QUEUE', //name of the queue in SQS
    alias: 'MY_SAMPLE_QUEUE', //name of the queue for RabbitMQ
};
const queueMessage = {
    company: 'Qrvey',
    name: 'Jhon Doe',
};

const options = {
    headers: {
        DelaySeconds: 3,
    },
};
const queueService = new QueueService();
let connected = false;
try {
    await queueService.connect();
    connected = true;

    const res = await queueService.sendMessage(queueSchema, message, options);

    await queueService.disconnect();
    console.log('res: ', res);
} catch (error) {
    console.log(error);
} finally {
    if (connected) await queueService.disconnect();
}

Conditions for AWS EventBridge or RA

@qrvey/event-broker [EventBusService] package can deliver events either to AWS EventBridge or RabbitMQ, depending on certain conditions. These conditions are determined by:

1. AWS EventBridge:

   • If the environment variable PLATFORM_TYPE is not set or have a different value to 'CONTAINER'.

2. RabbitMQ:

   • If the environment variable PLATFORM_TYPE is set to 'CONTAINER'.

Usage Example

const { EventBusService } = require('@qrvey/event-broker');

const queueSchema = {
    name: 'MY_SAMPLE_BUS', //name of the bus even in Amazon EventBridge, if AWS_EVENT_BUS_NAME is defined, you will need to set this value.
    alias: 'MY_SAMPLE_QUEUE', //name of the queue for RabbitMQ
};
const eventBridgeMessage = {
    EventBusName: 'my-event-bus', //The name of the event bus to which the event is sent. If not specified, the event is sent to the default(AWS_EVENT_BUS_NAME) event bus.
    Detail: { 'key1': 'value1', 'key2': 'value2' }, //A JSON string containing detailed information about the event. This field is required and contains the specific data of the event.
    DetailType: 'MyEventType', //An arbitrary identifier for the type of the event. It can be any string that describes the nature of the event.
    Source: 'my.application', //The source of the event. This field is typically an identifier of the application or service that generates the event.
    Time: '2024-06-26T12:00:00Z', //The time at which the event was generated. Is not required.
    Resources: ['arn:aws:s3:::my-bucket'], //A list of resources that are related to the event. Each resource should be a string representing the ARN of an AWS resource. Is not required.
    AccountId: '123456789012', //The AWS account ID where the event was generated. If not specified, the account ID of the current context is used.

};

const options = {
    headers: {
        DelaySeconds: 3,
    },
};
const queueService = new QueueService();
let connected = false;
try {
    await queueService.connect();
    connected = true;

    const res = await queueService.sendMessage(queueSchema, message, options);

    await queueService.disconnect();
    console.log('res: ', res);
} catch (error) {
    console.log(error);
} finally {
    if (connected) await queueService.disconnect();
}

API

Class

QueueService

Functions

connect(): Promise<any>

sendMessage(queue: string, message: object, options: IFunctionMapping, options: Options.Publish): Promise<any>

• queueSchema: Object with the queue information.
• queueSchema.name: The name of the queue in AWS.
• queueSchema.alias: The name of the queue in RabbitMQ.
• message: the body of the messages to be sent to the queue.
• options: An object with additional configuration options.
• options.headers: headers of the message
• Returns: A promise that resolves with the result of the invoked function or rejects with an error if the invocation fails.

deleteMessage(queue: string, receiptHandle: string): Promise<any>

• queue: The name of the queue.
• receiptHandle:

disconnect(): Promise<any>

Class

EventBusService

Functions

connect(): Promise<any>

sendMessage(queue: IQueueSchema, message: IEventBridgeMessage): Promise<any>

• IQueueSchema: Object with the queue information.
• queueSchema.name: The name of the bus in AWS EventBridge.
• queueSchema.alias: The name of the queue in RabbitMQ.
• message: The body of the messages to be sent to the queue. message.EventBusName: The name of the event bus in AWS EventBridge. Optional.
• message.Detail: A JSON string containing detailed information about the event. Required.
• message.DetailType: An arbitrary identifier for the type of the event. Required.
• message.Source: The source of the event, typically an identifier of the application or service generating the event. Required.
• message.Time: The time the event was generated. Optional.
• message.Resources: A list of related resources, each represented as a string containing the ARN of an AWS resource. Optional.
• message.AccountId: The AWS account ID where the event was generated. Optional. If not specified, the current context's account ID is used.
• Returns: A promise that resolves with the result of the invoked function or rejects with an error if the invocation fails.

disconnect(): Promise<any>