node-zookeeper-client-async

A promises wrapper over https://github.com/alexguan/node-zookeeper-client

For the most part it has each method included in the original node-zookeeper-client, with each method with a callback having an additional Async variant (e.g. createAsync).

The symantics are slightly different in that operations on nonexistant nodes typically do not reject (i.e. return an error), but rather resolve null.

Documentation

For more specific information see the documentation

Example

const zk = require('node-zookeeper-client-async');


(async function main() {
    const client = zk.createAsyncClient("127.0.0.1:2181");

    // connect to the server
    await client.connectAsync();
    console.log('connected!');

    // create a node
    const rootPath = await client.mkdirpAsync('/test');
    console.log(`created ${rootPath}`)

    // add some ephemeral nodes
    await client.createAsync('/test/counter-', Buffer.from('first'), null, zk.CreateMode.EPHEMERAL_SEQUENTIAL);
    await client.createAsync('/test/counter-', Buffer.from('second'), null, zk.CreateMode.EPHEMERAL_SEQUENTIAL);

    // list the nodes
    const nodes = await client.getChildrenAsync('/test');

    // print stuff to console
    console.log(`${rootPath} has the children:`)
    await Promise.all(nodes.map(async node => {
        const data = await client.getDataAsync(`/test/${node}`);
        console.log(`  ${node}: ${data.data}`);
    }));

    // delete everything
    await client.rmrfAsync(rootPath);

    // shut down
    await client.closeAsync();
    console.log('disconnected');
})();

Console output:

~/node-zookeeper-client-async$ node example.js
connected!
created /test
/test has the children:
  counter-0000000000: first
  counter-0000000001: second
disconnected