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deferred-leveldown

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deferred-leveldown

For handling delayed-open on LevelDOWN compatible libraries

  • 0.3.0
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
742K
decreased by-22.95%
Maintainers
3
Weekly downloads
 
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What is deferred-leveldown?

The deferred-leveldown npm package is a wrapper for LevelDOWN that defers operations until the underlying store is ready. This is particularly useful for scenarios where you need to queue operations while waiting for the database to be initialized or opened.

What are deferred-leveldown's main functionalities?

Deferred Operations

This feature allows you to queue operations like 'put' and 'get' until the underlying LevelDOWN store is ready. The operations will be executed once the store is initialized.

const levelup = require('levelup');
const leveldown = require('leveldown');
const deferredLeveldown = require('deferred-leveldown');

const db = levelup(deferredLeveldown(leveldown('./mydb')));

db.put('key', 'value', (err) => {
  if (err) return console.error('Error:', err);
  console.log('Put operation completed');
});

db.get('key', (err, value) => {
  if (err) return console.error('Error:', err);
  console.log('Got value:', value);
});

Error Handling

This feature demonstrates how deferred-leveldown handles errors. If an operation fails, the error is passed to the callback, allowing you to handle it appropriately.

const levelup = require('levelup');
const leveldown = require('leveldown');
const deferredLeveldown = require('deferred-leveldown');

const db = levelup(deferredLeveldown(leveldown('./mydb')));

db.put('key', 'value', (err) => {
  if (err) return console.error('Error:', err);
  console.log('Put operation completed');
});

db.get('nonexistentKey', (err, value) => {
  if (err) return console.error('Error:', err);
  console.log('Got value:', value);
});

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Package last updated on 16 Apr 2015

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