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feat: Add multi instance for consumer #43

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feat: Add multi instance for consumer #43

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66 changes: 36 additions & 30 deletions lib/sqs.service.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ export class SqsService implements OnModuleInit, OnModuleDestroy {
public constructor(
@Inject(SQS_OPTIONS) public readonly options: SqsOptions,
private readonly discover: DiscoveryService,
) {}
) { }

public async onModuleInit(): Promise<void> {
this.logger = this.options.logger ?? new Logger('SqsService', { timestamp: false });
Expand All @@ -31,37 +31,43 @@ export class SqsService implements OnModuleInit, OnModuleDestroy {

this.options.consumers?.forEach((options) => {
const { name, ...consumerOptions } = options;
if (this.consumers.has(name)) {
throw new Error(`Consumer already exists: ${name}`);
}

const metadata = messageHandlers.find(({ meta }) => meta.name === name);
if (!metadata) {
this.logger.warn(`No metadata found for: ${name}`);
}
consumerOptions.instances = consumerOptions.instances ?? 1;

for (let i = 0; i < consumerOptions.instances; i++) {
const consumerName = `${name}_${i}`;
if (this.consumers.has(consumerName)) {
throw new Error(`Consumer already exists: ${consumerName}`);
}

const metadata = messageHandlers.find(({ meta }) => meta.name === name);
if (!metadata) {
this.logger.warn(`No metadata found for: ${consumerName}`);
}

const isBatchHandler = metadata.meta.batch === true;
const consumer = Consumer.create({
...consumerOptions,
...(isBatchHandler
? {
const isBatchHandler = metadata.meta.batch === true;
const consumer = Consumer.create({
...consumerOptions,
...(isBatchHandler
? {
handleMessageBatch: metadata.discoveredMethod.handler.bind(
metadata.discoveredMethod.parentClass.instance,
),
}
: { handleMessage: metadata.discoveredMethod.handler.bind(metadata.discoveredMethod.parentClass.instance) }),
});

const eventsMetadata = eventHandlers.filter(({ meta }) => meta.name === name);
for (const eventMetadata of eventsMetadata) {
if (eventMetadata) {
consumer.addListener(
eventMetadata.meta.eventName,
eventMetadata.discoveredMethod.handler.bind(metadata.discoveredMethod.parentClass.instance),
);
: { handleMessage: metadata.discoveredMethod.handler.bind(metadata.discoveredMethod.parentClass.instance) }),
});

const eventsMetadata = eventHandlers.filter(({ meta }) => meta.name === name);
for (const eventMetadata of eventsMetadata) {
if (eventMetadata) {
consumer.addListener(
eventMetadata.meta.eventName,
eventMetadata.discoveredMethod.handler.bind(metadata.discoveredMethod.parentClass.instance),
);
}
}
this.consumers.set(consumerName, consumer);
}
this.consumers.set(name, consumer);
});

this.options.producers?.forEach((options) => {
Expand All @@ -86,11 +92,11 @@ export class SqsService implements OnModuleInit, OnModuleDestroy {
}

private getQueueInfo(name: QueueName) {
if (!this.consumers.has(name) && !this.producers.has(name)) {
if (!this.consumers.has(`${name}_0`) && !this.producers.has(`${name}_0`)) {
throw new Error(`Consumer/Producer does not exist: ${name}`);
}

const { sqs, queueUrl } = (this.consumers.get(name) ?? this.producers.get(name)) as {
const { sqs, queueUrl } = (this.consumers.get(`${name}_0`) ?? this.producers.get(`${name}_0`)) as {
sqs: AWS.SQS;
queueUrl: string;
};
Expand Down Expand Up @@ -125,15 +131,15 @@ export class SqsService implements OnModuleInit, OnModuleDestroy {
}

public getProducerQueueSize(name: QueueName) {
if (!this.producers.has(name)) {
if (!this.producers.has(`${name}_0`)) {
throw new Error(`Producer does not exist: ${name}`);
}

return this.producers.get(name).queueSize();
return this.producers.get(`${name}_0`).queueSize();
}

public send<T = any>(name: QueueName, payload: Message<T> | Message<T>[]) {
if (!this.producers.has(name)) {
if (!this.producers.has(`${name}_0`)) {
throw new Error(`Producer does not exist: ${name}`);
}

Expand All @@ -150,7 +156,7 @@ export class SqsService implements OnModuleInit, OnModuleDestroy {
};
});

const producer = this.producers.get(name);
const producer = this.producers.get(`${name}_0`);
return producer.send(messages as any[]);
}
}