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Connect Google BigTable and RabbitMQ in our serverless environment

Use this template to Read rows from Google BigTable using them to send RabbitMQ messages.

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Read rows from Google BigTable

Used integrations:
class GoogleBigtableSourceGetRows {
async init() {
// TODO: Create your google-bigtable credential
// More info at https://yepcode.io/docs/integrations/google-bigtable/#credential-configuration
const googleBigTable = yepcode.integration.googleBigTable(
"your-google-bigquery-bigtable-name"
);
// TODO: Customize your instance and table names
this.table = await googleBigTable
.instance("your-instance-name")
.table("your-table-name");
}

async fetch(publish, done) {
// You can customize get options. eg: get matching keys
// Look at: https://cloud.google.com/nodejs/docs/reference/bigtable/latest/bigtable/getrowsoptions
const getRowsOptions = {};
const [rows] = await this.table.getRows(getRowsOptions);

for (const rowResponse of rows) {
const [row] = await rowResponse.get();
const item = this._mapRowToItem(row);
await publish(item);
}
done();
}

_mapRowToItem(row) {
const columnsAndLastValue = Object.entries(row.data).map(
([columnName, columnContent]) => [
columnName,
this._getLastColumnValue(columnContent),
]
);
return Object.fromEntries(columnsAndLastValue);
}

_getLastColumnValue(columnContent) {
// The second [0] is to access the last value
// You can access previous values by accessing the next
// elements in the list
return columnContent[0][0].value;
}

async close() {}
}

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Send RabbitMQ messages

Used integrations:
class AmqpTargetRabbitmqSendMessage {
async init() {
// TODO: Create your rabbitmq credential
// More info at https://yepcode.io/docs/integrations/amqp/#credential-configuration
this.conn = await yepcode.integration.amqp("your-amqp-credential-name");
this.channel = await this.conn.createChannel();
}

async consume(item) {
// TODO: Customize your queue name and message
const queue = "tasks";
const message = `The message content is: ${JSON.stringify(item)}`;
this.channel.sendToQueue(queue, Buffer.from(message));
}

async close() {
try {
await this.channel.close();
} catch (error) {
console.error(`Error closing channel`, error);
}
try {
await this.conn.close();
} catch (error) {
console.error(`Error closing connection`, error);
}
}
}

Other combinations

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