Introduction to Clients

Now that your Worker is running, it's time to start a Workflow Execution. You’ll need a Client to do this. A Client acts as the bridge for communication between your applications and the Temporal Service and performs actions such as:

• Start a Workflow Execution
• Cancel a Workflow Execution
• Query a Workflow Execution
• Get results from a Workflow Execution

We’ll use this code to start the reimbursement Workflow.

Next Step

Client Code

import { Connection, Client } from '@temporalio/client';
import { reimbursementWorkflow } from './workflows';
async function run() 
    const connection = await Connection.connect({ 
    address: 'localhost:7233' }); //Connect to the default Server location (localhost:7233)
    const client = new Client({ connection });
    const handle = await client.workflow.start(reimbursementWorkflow, {
   args: ['User123', 100], //Arguments to be passed into reimbursementWorkflow
   taskQueue: 'reimbursement-queue', // Tasks from reimbursementWorkflow are placed onto reimbursement-queue which is being polled by the Worker we configured
   workflowId: 'reimbursement-workflow', // in practice, use a meaningful business ID, like customerId or transactionId
 });
 console.log(`Started workflow ${handle.workflowId}`);
 const output = await handle.result();
 console.log(output);
}
run().catch((err) => {
    console.error(err);
    process.exit(1);
});

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