Quick and dirty example of the Neo4j 4.0 js driver promise api

sai.js

const neo4j = require('neo4j-driver')

const queryTemplate = `
  MATCH (u:User {id: 'some-user-id'})-[:POSTED_ON_2020_05_10|POSTED_ON_2020_05_17]->(p:Post)
  RETURN p ORDER BY p.createdAt;
`

let driver = neo4j.driver(
  'neo4j://localhost',
  neo4j.auth.basic('neo4j', 'password')
)

let localBuf = [];

const runQuery = async (query) => {

  console.log(`running query: ${query}`)
  const t0 = Date.now()

  let session = driver.session({
    database: 'sai',
  })
  try {
    let {records, summary} = await session.run(query)
    console.log(`starting result consumption...`)
    records.forEach((record) => localBuf.push(record.toObject()))
    console.log(`results consumed`)
    console.log(`results available after: ${summary.resultAvailableAfter}ms, consumed after ${summary.resultConsumedAfter}ms`)
  } catch (e) {
    console.error(e)
    return
  }
  session.close()

  const delta = Date.now() - t0
  console.log(`consumed ${localBuf.length} in ${delta}ms, approximate rate of ${localBuf.length / (delta / 1000)} obj/s`)
}

runQuery(queryTemplate)
  .then(() => {
    driver.close()
    console.log('finished')
  })
  .catch(e => console.error(e))