<strong>This article looks at getting started with Node.js and Apache Ignite. Learn how to quickly install the Node.js Thin Client package for Ignite.</strong>
This article looks at getting started with Node.js and Apache Ignite. Learn how to quickly install the Node.js Thin Client package for Ignite.Introduction
Apache Ignite provides support for a number of major programming languages. Recently, support for additional programming languages has also been added using what is termed as a Thin Client. New Thin Clients include Python, PHP, and Node.js.
The characteristics of a Thin Client are as follows:
In summary, a Thin Client just establishes a socket connection to a standard Ignite node and performs all operations through that node.
In this article, we’ll focus on Node.js and see how we can quickly use this with Ignite
In order to use Node.js with Ignite, we need the following:
In the following examples, we will use an Apple Macintosh computer running macOS Mojave.Installation
We’ll use the binary distribution of Ignite, which can be downloaded directly from the Apache Ignite download page.
An easy way to install Node.js on macOS is to use Homebrew. This is as simple as typing the following in a terminal window:
brew install node
Once the installation is complete, we can check the software version as shown in Figure 1.
Figure 1: Check Software Version.
Node.js source code or installers for other operating systems can also be downloaded from the Node.js website.
Next, we need to install the Node.js Thin Client package for Ignite. The quickest way to do this is as follows from a terminal window:
npm install -g apache-ignite-client
The output should be similar to Figure 2.
Figure 2: Install Node.js Thin Client.
We can also build the Thin Client from sources, and the official documentation contains full details on how to do this.Node.js Examples
Ignite ships with a number of Node.js examples. However, before we can use them, we need to start at least one Ignite server node. We can do this as follows from a terminal window:
The variable $IGNITE_HOME being set to the Ignite installation directory.
The output should be similar to Figure 3.
Figure 3: Start Ignite Server Node.
Next, we need to link the Ignite Node.js examples. We can do this as follows from a terminal window:
cd $IGNITE_HOME/platforms/nodejs/examples npm link apache-ignite-client
Using link provides a quick and easy way to test the Ignite Node.js examples.Run Example
We are now ready to try an example, and from the terminal window in the examples directory, we can do the following:
The output should be similar to Figure 4.
Figure 4: CachePutGetExample.js Output.Web Console
We can check the Ignite storage by using Web Console. Web Console requires a Web Agent to be running and the option to download the Web Agent is provided from the Web Console. We also need to ensure that the directory:
is copied one level up, so that we have the following:
Also, in the CachePutGetExample.js file, we need to comment out the following line:
Once we have done these steps, we can restart our Ignite server node, start the Web Agent by navigating to the directory where the Web Agent files have been unpacked and run the following command:
and run CachePutGetExample.js again. From the Web Console, if we navigate to Monitoring > Dashboard > Caches, we can see that Ignite storage has been created with four Primary values, similar to Figure 5.
Figure 5: Ignite Storage.Next Steps
There are additional Node.js examples that ship with Ignite and these can also be tested from a terminal window. The official documentation contains further details about the Node.js Thin Client for Ignite.Summary
In this first article, we have quickly installed the Node.js Thin Client package for Ignite and tested an example that ships with the Ignite binary distribution. In future articles, we will look at additional application examples beyond those provided with the Ignite binary distribution. Until next time!
Originally published by Akmal Chaudhri at https://dzone.com
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Node is fast, scalable, and easy to get started with. Its default package manager is npm, which means it also sports the largest ecosystem of open-source libraries. Node is used by companies such as NASA, Uber, Netflix, and Walmart.
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With over 43,000 GitHub stars, Express is the most popular Node framework. It brands itself as a fast, unopinionated, and minimalist framework. Express acts as middleware: it helps set up and configure routes to send and receive requests between the front-end and the database of an app.
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The project has over 41,000 GitHub stars and is built to power large projects. Meteor is used by companies such as Mazda, Honeywell, Qualcomm, and IKEA. It has excellent documentation and a strong community behind it.Koa
Koa is built by the same team that built Express. It uses ES6 methods that allow developers to work without callbacks. Developers also have more control over error-handling. Koa has no middleware within its core, which means that developers have more control over configuration, but which means that traditional Node middleware (e.g. req, res, next) won't work with Koa.
Koa already has over 26,000 GitHub stars. The Express developers built Koa because they wanted a lighter framework that was more expressive and more robust than Express. You can find out more about the differences between Koa and Express here.Sails
Sails is a real-time, MVC framework for Node that's built on Express. It supports auto-generated REST APIs and comes with an easy WebSocket integration.
The project has over 20,000 stars on GitHub and is compatible with almost all databases (MySQL, MongoDB, PostgreSQL, Redis). It's also compatible with most front-end technologies (Angular, iOS, Android, React, and even Windows Phone).Nest
Nest is packaged in such a way it serves as a complete development kit for writing enterprise-level apps. The framework uses Express, but is compatible with a wide range of other libraries.LoopBack
LoopBack is a framework that allows developers to quickly create REST APIs. It has an easy-to-use CLI wizard and allows developers to create models either on their schema or dynamically. It also has a built-in API explorer.
LoopBack has over 12,000 GitHub stars and is used by companies such as GoDaddy, Symantec, and the Bank of America. It's compatible with many REST services and a wide variety of databases (MongoDB, Oracle, MySQL, PostgreSQL).Hapi
Similar to Express, hapi serves data by intermediating between server-side and client-side. As such, it's can serve as a substitute for Express. Hapi allows developers to focus on writing reusable app logic in a modular and prescriptive fashion.
The project has over 11,000 GitHub stars. It has built-in support for input validation, caching, authentication, and more. Hapi was originally developed to handle all of Walmart's mobile traffic during Black Friday.
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