marklogic

MarkLogic Node.js Client API

The MarkLogic Node.js Client API provides access to the MarkLogic database from Node.js applications.

Features

• Writing, reading, patching, and deleting documents in JSON, XML, text, or binary formats
• Querying over documents including parsing string queries, extracting properties, and calculating facets
• Projecting tuples (like table rows) out of documents
• Single transactions and multi-statement transactions for database changes
• Writing, reading, and deleting graphs and executing SPARQL queries over graphs
• Extending the built-in services or evaluating or invoking your own JavaScript or XQuery on the server
• Basic, digest, certificate, Kerberos, and SAML authentication
• Import libraries as JavaScript mjs modules
• Data Services First - MarkLogic's support for microservices
• Optic query DSL, document matching, relevance, multiple groups
• Generate query based views, redaction on rows
• Data Movement SDK - move large amounts of data into, out of, or within a MarkLogic cluster

Getting Started

You can install the marklogic package as a dependency for your Node.js project using npm:

npm install marklogic --save

For Windows OS please use the below for Node Client 2.9.1:

npm install marklogic --save --ignore-scripts

With the marklogic package installed, the following inserts two documents in a collection into the Documents database using MarkLogic's built-in REST server at port 8000:

const marklogic = require('marklogic');

const db = marklogic.createDatabaseClient({
  host:     'localhost',
  port:     '8000',
  database: 'Documents',
  user:     'admin',
  password: 'admin',
  authType: 'DIGEST',
  // enableGzippedResponses is optional and can be set to true in order to request MarkLogic to compress the response for better performance,
    // the client will automatically decompress the response before it returns a value.
  enableGzippedResponses: true
});

// For MarkLogic Cloud
const db = marklogic.createDatabaseClient({
    apiKey:   'changeme',
    host:     'example.beta.marklogic.com',
    authType: 'cloud',
    // basePath is optional.
    basePath: '/marklogic/test',
    // accessTokenDuration (in seconds) is optional and can be used to customize the expiration of the access token.
    accessTokenDuration: 10,
    // enableGzippedResponses is optional and can be set to true in order to request MarkLogic to compress the response for better performance,
    // the client will automatically decompress the response before it returns a value.
    enableGzippedResponses: true
});

db.createCollection(
  '/books',
  {author: 'Beryl Markham', ...},
  {author: 'WG Sebald',     ...}
  )
.result(function(response) {
    console.log(JSON.stringify(response, null, 2));
  }, function (error) {
    console.log(JSON.stringify(error, null, 2));
  });

Resources

• Node.js Client API Documentation
• Node.js Application Developer's Guide
• MarkLogic Training for the Node.js Client API

Code Examples

The Node.js Client API ships with code examples to supplement the examples in the online resources. To run the examples, follow the instructions here:

examples/1readme.txt

Generating Documentation Locally

After installing the project dependencies (including the gulp build system), you can build the reference documentation locally from the root directory of the marklogic package:

npm run doc

The documentation is generated in a doc subdirectory. The documentation can also be accessed online here.

Support

The MarkLogic Node.js Client API is maintained by MarkLogic Engineering. It is designed for use in production applications with MarkLogic Server. Everyone is encouraged to file bug reports, feature requests, and pull requests through GitHub. This input is critical and will be carefully considered, but we can’t promise a specific resolution or timeframe for any request. In addition, MarkLogic provides technical support for release tags of the Node.js Client API to licensed customers under the terms outlined in the Support Handbook. For more information or to sign up for support, visit help.marklogic.com.