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Java Streams, Part 4: From concurrent to parallel
This fourth installment of the Java Streams series identifies and explains factors that determine the effectiveness of parallel processing, putting them into historical and technical context. An understanding of these factors provides a foundation for making optimal use of the Streams library for parallel execution. (The next installment applies the principles outlined here directly to Streams.)
18 Jul 2016
Java Streams, Part 5: Parallel stream performance
This fifth and final installment of the Java Streams series continues the previous installment's discussion of factors that influence the effectiveness of parallel processing, and applies them to the Streams library. Find out why some stream pipelines parallelize better than others, and see how to analyze your own streams code for parallel performance.
18 Jul 2016
Java Streams, Part 1: An introduction to the java.util.stream library
Explore the Java Streams library, introduced in Java SE 8, in this series by Java Language Architect Brian Goetz. By taking advantage of the power of lambda expressions, the java.util.stream package makes it easy to run functional-style queries on collections, arrays, and other data sets.
Also available in: Chinese  
06 Jul 2016
Java Streams, Part 2: Aggregating with Streams
Explore the Java Streams library, introduced in Java SE 8, in this series by Java Language Architect Brian Goetz. By taking advantage of the power of lambda expressions, the java.util.stream package makes it easy to run functional-style queries on collections, arrays, and other data sets. In this installment, learn how to use the java.util.stream package to aggregate and summarize data efficiently.
Also available in: Chinese  
06 Jul 2016
Java Streams, Part 3: Streams under the hood
Explore the Java Streams library, introduced in Java SE 8, in this series by Java Language Architect Brian Goetz. By taking advantage of the power of lambda expressions, the java.util.stream package makes it easy to run functional-style queries on collections, arrays, and other data sets. In this installment, learn how to fine-tune your queries for maximum efficiency.
Also available in: Chinese  
06 Jul 2016
Achieve your API strategy with IBM API Connect
To deliver on your API strategy, you need to understand your key stakeholders, their needs, and how API Connect can help to meet those needs. In this article you learn about these essential elements of an API strategy. You see how IBM API Connect goes beyond the limits of an API management platform, allowing your organization to not only manage and secure its APIs, but to also create and run them. Finally, you see how quickly you can get started with API Connect.
06 Jun 2016
Editor's picks: Top five WebSphere Liberty tutorials
If there is one thing that IBM WebSphere Liberty gives you, it's the freedom, and flexibility, to dynamically create applications both on-premises and in the cloud. This article highlights the top five tutorials in developerWorks for WebSphere Liberty.
31 May 2016
Refactoring to microservices, Part 3: Roadmap to microservices adoption
Microservices are taking the development world by storm. In this 3-part series, "Refactoring to microservices," we'll cover why they matter, what factors to consider in planning your approach to microservices, the role of data factoring, and a step-by-step migration process. Part 3 lays out a roadmap for transforming your applications from a monolith to a set of microservices.
23 May 2016
Refactoring to microservices, Part 2: What to consider when moving your data
In this 3-part series, learn why microservices matter, what factors to consider in planning your evolution to microservices, the role of data factoring, and a step-by-step migration process. Part 2 delves into data decisions, and shows examples where refactoring your data for a microservices-based approach is (and is not) the best idea.
Also available in: Chinese   Spanish  
04 May 2016
Extend Java apps to mobile and cloud
Tips, considerations, best practices, and encouragement for extending existing Java-based enterprise transaction systems and systems of record to mobile applications deployed in cloud environments.
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04 May 2016
4 reasons why WebSphere Liberty and Bluemix ease the lift and shift of on-premises microservices to the cloud
In this article, Vijay Bhadriraju, IBM Senior Software Engineer, explains his experience in lifting and shifting on-premises Java microservices to Bluemix cloud. He also examines the lifecycle management benefits that these microservices can experience by running in Bluemix. This tutorial is geared to developers and IT personnel who are running microservices in their on-premises infrastructure and want to move them to the cloud.
Also available in: Chinese  
21 Apr 2016
Refactoring to microservices, Part 1: What to consider when migrating from a monolith
Microservices are taking the development world by storm. In this 3-part series, we'll cover why they matter, what factors to consider in planning your approach to microservices, the role of data factoring, and a step-by-step migration process. Part 1 introduces microservices and discusses considerations for refactoring your applications to take advantage of a microservices architecture.
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13 Apr 2016
Such a deal: Jump-start your cloud projects with developerWorks Premium
For a modest investment, our new developerWorks Premium membership program can yield huge benefits for you in terms of time and (yes) money giving you access to powerful tools that support your cloud projects, a trove of learning resources to help you build your skills, discounts to industry events where you can expand and enhance your network, free certification testing, and more.
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29 Mar 2016
Use Elasticsearch in your Java applications
Elasticsearch is taking the full-text search world by storm by combining an easy-to-use REST API with automated cluster scaling. Get a hands-on introduction to using Elasticsearch from a command shell and from within a Java application.
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08 Mar 2016
Explore what's new in IBM Bluemix
In this updated demo, David Barnes shows how to start developing and deploying applications using the latest Bluemix runtimes and services, any way you want to do it: using the Cloud Foundry approach, using IBM Containers, or using OpenStack virtual machines.
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08 Mar 2016
Minecraft and Bluemix, Part 4: Integrating Watson into Minecraft on Bluemix
In this tutorial series, you'll learn how to use Docker, Eclipse, and Bluemix to develop, extend, and host your own Minecraft servers. Find out how to use Eclipse to build Minecraft plugins, test them locally using Docker, and use Bluemix to host your Docker containers on the Internet. You'll also harness the power of IBM Watson from within Minecraft for more educational and interactive game play. In Part 4, you'll learn how to extend the Spigot server with a plugin that uses Watson cognitive services to add a little science to your game play.
Also available in: Chinese   Japanese   Portuguese  
20 Feb 2016
Minecraft and Bluemix, Part 2: Building plugins for Minecraft with Docker and Eclipse
In this tutorial series, you'll learn how to use Docker, Eclipse, and Bluemix to develop, extend, and host your own Minecraft servers. Find out how to use Eclipse to build Minecraft plugins, test them locally using Docker, and use Bluemix to host your Docker containers on the Internet. You'll also harness the power of IBM Watson from within Minecraft for more educational and interactive game play. In Part 2, you'll set up your local development environment in Eclipse, then develop, build, and export your own server-side Minecraft plugin into a local Docker image.
Also available in: Chinese   Japanese   Portuguese  
18 Feb 2016
Minecraft and Bluemix, Part 3: Deploying Spigot Minecraft servers on Bluemix
In this tutorial series, you'll learn how to use Docker, Eclipse and Bluemix to develop, extend, and host your own Minecraft servers. Find out how to use Eclipse to build Minecraft plugins, test them locally using Docker, and use Bluemix to host your Docker containers on the Internet. You'll also harness the power of IBM Watson from within Minecraft for more educational and interactive game play. In Part 3, we'll deploy Docker images to Bluemix, and run them as Docker containers that are accessible through the cloud.
Also available in: Chinese   Japanese   Portuguese  
18 Feb 2016
Minecraft and Bluemix, Part 1: Running Minecraft servers within Docker
In this tutorial series, you'll learn how to use Docker, Eclipse, and Bluemix to develop, extend, and host your own Minehttp://www.ibm.com/developerworks/i/twitterdw-26796-minecraftseries.jpgcraft servers. Find out how to use Eclipse to build Minecraft plugins, test them locally using Docker, and use Bluemix to host your Docker containers on the Internet. You'll also harness the power of IBM Watson from within Minecraft for more educational and interactive game play. In Part 1, you'll set up your local Minecraft and Docker development environment, and see the power of Docker for building custom servers for Minecraft. You'll even get started playing with Minecraft on your own locally hosted server!
Also available in: Chinese   Japanese   Portuguese  
18 Feb 2016
Docker: A boon for the modern developer
Use Docker to code more productively and expand your skills more efficiently. Declutter your development environment, eliminate dependency conflicts, and reduce development and learning time by working with containerized applications.
Also available in: Chinese   Japanese  
05 Jan 2016
Bluemix fundamentals: Deploy a sample Java application to the cloud
Get started working in the cloud using the language and tooling you're already familiar with as a Java developer. In this tutorial, learn how to run, modify, test, and deploy a simple web app to the cloud using the Java language and the IBM Bluemix Tools for Eclipse. Once you deploy the app to Bluemix, IBM's cloud development platform, anyone on the Internet can access it.
Also available in: Chinese   Japanese   Portuguese  
07 Dec 2015
developerWorks Premium for Java, web, and open source developers
developerWorks recently debuted the developerWorks Premium developer membership program, and it offers a little bit of something for everyone, no matter your area of interest and level of expertise. With an extensive Safari digital library, conference replays and discounts, and other perks curated with you in mind, you're sure to find it worth the price.
Also available in: Chinese   Japanese  
01 Dec 2015
Using Spark Streaming for keyword detection
As new kinds of devices connect to the internet, they generate petabytes of data every day. Companies analyze this valuable data to better understand and meet their customers’ needs. Streaming big data analytics gives users the ability to analyze data in real time, which is useful in time-critical applications like fraud detection. In this article, learn how to use the Spark Streaming platform for real-time keyword detection.
Also available in: Chinese  
26 Nov 2015
Notes from developerWorks Technology: Top Java tutorials from 2015
The developerWorks Technologies editor showcases the top tutorials published in 2015 for Java developers.
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17 Nov 2015
Playful web development, Part 1: Manage user authentication with the Play Framework and Scala
Implement user management for your Play Framework applications and put your Scala skills to work. Pablo Pedemonte takes you through building a basic Play application that handles authentication and authorization. You can even use the application code as a starter for your own Play projects to shorten user-management development time.
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12 Nov 2015
Move your Java application into a hybrid cloud using Bluemix, Part 3
In this article, we examine how to run stand-alone Java programs in Bluemix. We also share some expert hints on navigating the Cloud Foundry documentation, using the CF command-line tool, and debugging in Cloud Foundry and Bluemix.
Also available in: Chinese   Japanese   Portuguese  
26 Oct 2015
Move your Java application into a hybrid cloud using Bluemix, Part 2
Want to quickly migrate a Tomcat application to IBM Bluemix using Eclipse tooling? This tutorial provides step-by-step directions to set up Eclipse tooling to analyze, migrate, and deploy a Tomcat application to the Liberty for Java runtime in Bluemix. We show you how to set up both the Java runtime and the SQL Database, and how to bind the application to the database.
Also available in: Chinese   Japanese   Portuguese  
21 Oct 2015
IBM@JavaOne 2015: Meeting the needs of the modern enterprise
The Java platform has been critical to IBM for almost two decades and continues to be as we move deeper into the era of cloud, mobile, and cognitive computing, key themes in this year's JavaOne conference. This article provides an overview of IBM's activities during JavaOne 2015.
Also available in: Chinese  
19 Oct 2015
Move your Java application into a hybrid cloud using Bluemix, Part 1
In this article, we show you how to tier a hybrid application, and we guide you step by step through migrating parts of your Tomcat or WebSphere applications to Bluemix, while connecting to services best left within your enterprise. We introduce a tool you can use to determine if your application will run in the Bluemix Liberty Java buildpack, and we show you how to connect to an SQL database in the cloud or on-premise. We'll also explain how to update an application for important cloud considerations including session persistence, scaling, and logging.
Also available in: Chinese   Japanese   Portuguese  
15 Oct 2015
Bluemix fundamentals: 5 key advantages, from a developer's perspective
In this short video, Bobby Woolf discusses benefits and advantages the IBM Bluemix has over other cloud platforms for developers.
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05 Oct 2015
Bluemix fundamentals: Add a world of cloud services to your application
Explore the cloud services offered in Bluemix based on their general functions. See how to add and manage services in the platform. Take a quick look at boilerplates, which are packages of sample code and services that are oriented around popular Internet technologies and languages.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Add a Cloudant NoSQL database to your Node.js app
Learn how to create and add a Cloudant NoSQL database to your Node.js web applications on Bluemix. Explore a data-driven, dynamically generated web store that changes appearance depending on current inventory stock levels. Use the web-based Cloudant Dashboard to view and maintain your NoSQL databases.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Add an SQL database to your PHP app
Learn how to create and add an SQL database to your PHP web applications on Bluemix. Explore a data-driven, dynamically generated web store that changes appearance depending on current inventory stock level. Use the web-based Bluemix SQL Database console to view and maintain your SQL databases.
Also available in: Chinese   Japanese  
05 Oct 2015
Bluemix fundamentals: Add an SQL database to your Java app
Learn how to create and add an SQL database to your Java web applications on Bluemix. Explore a data-driven, dynamically generated web store that changes appearance depending on current inventory stock level. Use the web-based Bluemix SQL Database Console to view and maintain your SQL databases.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Set up team collaboration and automatic deployments for your PHP app
In this tutorial, learn the basics of storing your application code in a Git repository hosted at DevOps Services, pushing code to that repository, and configuring a multi-stage Delivery Pipeline for automatic deployment. The pipeline is triggered whenever you or someone on your team pushes code to your Git repository.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Set up team collaboration and automatic deployments for your Node.js app
In this tutorial, learn the basics of storing your application code in a Git repository hosted at DevOps Services, pushing code to that repository, and configuring a multi-stage Delivery Pipeline for automatic deployment. The pipeline is triggered whenever you or someone on your team pushes code to your Git repository.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Set up team collaboration and automatic deployments for your Java app
In this tutorial, learn the basics of storing your application code in a Git repository hosted at DevOps Services, pushing code to that repository, and configuring a multi-stage Delivery Pipeline for automatic deployment. The pipeline is triggered whenever you or someone on your team pushes code to your Git repository.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Deploy a sample PHP application to the cloud
Get started working in the cloud using the language and tools you're already familiar with as a web developer. In this tutorial, learn how to run, modify, test, and deploy a simple PHP app to the cloud. Once you deploy the app to Bluemix, IBM's cloud development platform, anyone on the Internet can access it.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Deploy a sample Node.js application to the cloud
Get started working in the cloud using the language and tools you're already familiar with as a web developer. In this tutorial, learn how to run, modify, test, and deploy a simple Node.js app to the cloud. Once you deploy the app to Bluemix, IBM's cloud development platform, anyone on the Internet can access it.
Also available in: Chinese   Japanese   Portuguese  
05 Oct 2015
Bluemix fundamentals: Start your free trial
You've seen the overviews of Bluemix and have a feel for what it can do for you. Now it's time to roll up your sleeves and get down to business. In this tutorial, you'll take the first step in working with IBM's robust cloud platform: starting your free Bluemix trial.
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05 Oct 2015
Develop full-stack Java apps with Vaadin in the cloud
Use the Vaadin Rich Web Starter boilerplate to deploy a customized DB2-backed, three-tier order-desk web app to the Bluemix cloud in minutes.
Also available in: Chinese   Japanese  
30 Sep 2015
Full-stack Java web dev with Vaadin
Java web developers are often forced to learn JavaScript, CSS, and HTML5 (cornerstone of all modern browsers) in order to create compelling interactive user experiences for their web applications. Vaadin open source framework empowers Java developers by giving them full-stack control within a 100% Java world.
Also available in: Chinese   Japanese  
30 Sep 2015
JVM concurrency: Building actor applications with Akka
Actor applications require a different style of programming from the linear approach that is used for single-threaded applications. Go deeper into structuring systems in terms of actors and messages from Scala code, using the Akka toolkit and runtime.
Also available in: Chinese   Russian   Japanese  
12 Aug 2015
Introduction to Java multitenancy
The multitenant JVM recently became available as part of the IBM SDK Java Technology Edition, Version 7 Release 1 as a tech preview. By running multiple applications within a single multitenant JVM, a cloud system can speed applications' start times and reduce their memory footprint. This article introduces the technology behind multitenant cloud JVM and discusses the main costs and benefits.
Also available in: Chinese   Russian   Japanese   Portuguese   Spanish  
06 Aug 2015
Use Maven with the Bluemix DevOps Services delivery pipeline
Learn how to integrate existing Apache Maven projects into the delivery pipeline in Bluemix DevOps Services and how to set up Maven projects to make them available as Bluemix DevOps Services projects.
Also available in: Chinese   Japanese  
20 May 2015
Build a data mining app using Java, Weka, and the dashDB service
The dashDB (formerly known as Analytics Warehouse and BLU Acceleration) service provides data warehousing and analytics as a service on IBM Bluemix. Developers can develop and deploy a heavy-duty analytic application using blazing-fast IBM BLU database technology offered in the cloud. Learn how to develop a data mining application using the Weka statistical analysis tool and leveraging the IBM BLU columnar database.
Also available in: Chinese   Chinese   Russian   Japanese   Spanish  
08 May 2015
JVM concurrency: Acting asynchronously with Akka
The actor model, a long-established approach to concurrent programming, gives you an easy way to build applications for high concurrency and scalability. Learn about the actor model and start working in Scala or Java with the Akka implementation of the model.
Also available in: Chinese   Russian   Japanese   Portuguese  
08 Apr 2015
Use a Liberty JAAS login module for Bluemix single sign-on
This tutorial provides a technique for Liberty-aware authentication with the Bluemix SSO service. Create a sample app that uses the Bluemix SSO service for user login; the Liberty server creates all necessary objects (Subject, Principal, Session) upon successful authentication. A Liberty app can obtain Bluemix SSO capabilities using JAAS authentication with the SSO service so that your authentication mechanism is abstracted from application code.
Also available in: Chinese   Russian   Japanese  
24 Mar 2015
Rapidly build a rich three-tier web app, Part 2: Build the application tier
In this three-part tutorial, learn how to use IBM Rational Application Developer and IBM Bluemix to rapidly build and host a multi-tier Java Enterprise Edition (JEE) app. Find out how you can save time in each stage: creating the data model and database, generating the data access code using the Java Persistence API (JPA), writing the Enterprise JavaBeans (EJBs) and web services, and using Dojo to create a rich web UI for viewing and modifying the data. When the application is complete, you'll deploy it to IBM Bluemix, the IBM Platform as a Service (PaaS).
Also available in: Chinese   Russian   Japanese   Portuguese  
10 Mar 2015
Rapidly build a rich three-tier web app, Part 3: Create a rich web UI
In this three-part tutorial, learn how to use IBM Rational Application Developer and IBM Bluemix to rapidly build and host a multi-tier Java Enterprise Edition (JEE) app. Find out how you can save time in each stage: creating the data model and database, generating the data access code using the Java Persistence API (JPA), writing the Enterprise JavaBeans (EJBs) and web services, and using Dojo to create a rich web UI for viewing and modifying the data. When the application is complete, you'll deploy it to IBM Bluemix, the IBM Platform as a Service (PaaS).
Also available in: Chinese   Russian   Japanese   Portuguese  
10 Mar 2015
Rapidly build a rich three-tier web app, Part 1: Build the database
In this three-part tutorial, learn how to use IBM Rational Application Developer and IBM Bluemix to rapidly build and host a multi-tier Java Enterprise Edition (JEE) app. Find out how you can save time in each stage: creating the data model and database, generating the data access code using the Java Persistence API (JPA), writing the Enterprise JavaBeans (EJBs) and web services, and using Dojo to create a rich web UI for viewing and modifying the data. When the application is complete, you'll deploy it to IBM Bluemix, the IBM Platform as a Service (PaaS).
Also available in: Chinese   Russian   Japanese   Portuguese  
10 Mar 2015
Explore MQTT and the Internet of Things service on IBM Bluemix
For interconnecting devices and applications, the Internet of Things (IoT) service in Bluemix is simple but powerful, thanks to MQTT (Message Queue Telemetry Transport). In this tutorial, see how MQTT works effectively behind the IoT service, and follow an easy process to build apps using the IoT service with Java and the Node-RED editor.
Also available in: Chinese   Japanese   Portuguese  
18 Feb 2015
Create and manage cloud applications with Java
For full, continuous integration, you need to automate deployment of applications in the cloud. This tutorial includes examples that show how to use the Cloud Foundry Java Client Library to automate how you create and manage apps in IBM Bluemix.
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10 Feb 2015
Integrating FindBugs, CheckStyle and Cobertura with Rational Team Concert build system
This article discusses the integration of quality assurance tools FindBugs, CheckStyle and Cobertura with IBM Rational Team Concert. This integration reduces defect generation when compiling and building an application. It improves the code quality of the application while performing the day-to-day build job. This technique can be used cross-platform with products and applications built on Java technology.
Also available in: Chinese   Russian  
22 Jan 2015
Embed rich reports in your applications
In this tutorial, learn how to embed reports in a sample application using the Embeddable Reporting service on Bluemix, IBM's cloud development platform. You'll start with a Liberty for Java application and add the Embeddable Reporting service, the MongoLab service, and the dashDB service. From this starting point, you can begin to embed your own reports into more complex applications.
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21 Jan 2015
Create a coupon-finding app by combining Yelp, Google Maps, Twitter, and Klout services
Use Bluemix, MongoDB, and external services provided by Yelp, Google, Twitter, and Klout to build an app that finds highly rated businesses.
Also available in: Chinese   Russian   Japanese  
17 Dec 2014
Translate your Twitter feed
Use the Watson Machine Translation and Watson Language Identification services in IBM Bluemix to translate and normalize content from social media channels such as Twitter in preparation for sentiment analysis.
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24 Nov 2014
Build a portable Java EE app across Bluemix and private cloud patterns
As a Java developer, you want the “write once, run anywhere” promise of Java. How can you ensure this if you are moving your applications between IBM Bluemix and on-premise cloud environments like SmartCloud Orchestrator or Pure Application System? In this article, we show you how.
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10 Nov 2014
Develop and manage Java Apps with IBM Bluemix and DevOps Services
Lauren Schaefer shows how easy it is to plan, track, and manage an agile Java development project with IBM DevOps Services.
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08 Oct 2014
Going to JavaOne? Take a Break!
If you find yourself looking for a little downtime from all the excitement at JavaOne 2014, look no further. This article sends you in the right direction to rest, refresh, and recharge.
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24 Sep 2014
IBM@JavaOne 2014: Developers first
As a longtime licensee of the Java platform, IBM is a regular supporter and active participant in the annual JavaOne conference. This article provides an overview of IBM's activities -- keynotes, technical presentations, demos, and after-hours entertainment -- during JavaOne 2014.
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24 Sep 2014
From the developerWorks trenches: The best open technologies content in 2014
As developerWorks celebrates its 15th anniversary, the technical landscape has never been more exciting or complex. Myriad products, projects, technologies, and techniques abound. Let us cut through the noise and provide a quick look at what's hot right now.
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16 Sep 2014
JVM concurrency: Asynchronous event handling in Scala
Scala Future and Promise classes give you powerful ways to handle asynchronous processing, including nonblocking ways to organize and sequence events. The async / await constructs, implemented as a macro, make it even easier to write nonblocking event handling in Scala. This tutorial shows you the basic Future and Promise techniques in action, then demonstrates how async / await can convert what looks like simple blocking code to nonblocking execution.
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02 Sep 2014
Build a game app with Liberty, Cloudant, and Single Sign On
This tutorial shows how to quickly build an online game application based on IBM Bluemix prebuilt services.
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22 Aug 2014
Unlock your on-premises translated content in the cloud
Enterprise software developers making the transition to cloud computing often ask how they can use the existing translated content in their on-premises databases from the cloud. Find out how to use the Cloud Integration add-on in Bluemix to unlock your translated content from systems of record and access it from the cloud even if the database is behind a secure firewall.
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19 Aug 2014
Improving performance and scalability for IBM Sterling Order Management
This article discusses the design best practices that are important for the performance and scalability of the IBM Sterling Order Management solution. Adopting these design best practices during implementation, helps eliminate the common performance bottlenecks that are introduced with custom design or code.
Also available in: Russian  
07 Aug 2014
Java multitenancy: Configuration options, tenant lifecycle, and isolation in action
The multitenant JVM is available with the IBM SDK Java Technology Edition, Version 7 Release 1 as a tech preview. By running multiple applications within a single multitenant JVM, a cloud system can speed applications' start times and reduce their memory footprint. Examine the tenant lifecycle, learn some of the available configuration options, and see the benefits of isolation of statics in tenant applications. This article builds on a previous developerWorks article, "Introduction to Java multitenancy."
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31 Jul 2014
JVM concurrency: To block, or not to block?
The CompletableFuture class added in Java 8 gives you new ways to handle the completion of asynchronous processing, including nonblocking ways to compose and combine events. This article helps you understand the differences between blocking and nonblocking approaches to handling completions and gives you some reasons to prefer nonblocking approaches.
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22 Jul 2014
Explore the eXtreme Scale-based caching service options in IBM PureApplication System
Caching services are a popular solution to address performance and scalability issues for cloud enterprise applications. Explore three caching options available with the IBM PureApplication System cloud system: One built-in, one based on WebSphere eXtreme Scale that uses a virtual system pattern on a cluster, and one based on eXtreme Scale that uses a VSP with a core OS image.
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28 Jun 2014
Build a portable Java travel app that integrates web services
Learn how to develop and deploy a Java PaaS web app on the cloud.
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27 Jun 2014
Use Software Defined Networking to optimize your IaaS
Explore Software Defined Networking (SDN) network management via software abstraction layers as a method to enhance and optimize your Infrastructure as a Service in the areas of interoperability, user and provider expectation management, developer and administrator requirements, and effective risk mitigation.
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24 Jun 2014
Use SLDT to transfer data to SoftLayer object storage
SoftLayer provides an object storage service that is based on OpenStack Swift. You can transfer files to and from the object store by using the SoftLayer APIs and a command-line tool like cURL, but that can be tedious for large files. This article describes how to use a simple Java tool, SLDT, to handle authentication, object segmenting, and data transfer to and from the SoftLayer object store.
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24 Jun 2014
Create IBM SmartCloud Orchestrator-compatible images for Windows
Creating images you can deploy through IBM SmartCloud Orchestrator requires knowledge of the operating system, the hypervisor on which the images are going to be deployed, and the corresponding hypervisor manager. Learn how to easily and smoothly prepare a SmartCloud Orchestrator-compatible image for Windows.
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10 Jun 2014
Java.next: Choosing your next JVM language
Any of the Java.next languages is a suitable candidate for your next language, so how do you choose? Investigate the factors that contribute to this important decision.
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13 May 2014
Java.next: Java 8 as Java.next
This installment of Java.next investigates the Java 8 release as a reasonable candidate for your next programming language. Find out how lambda blocks and the streaming API upgrade Java to a modern language.
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28 Apr 2014
Java.next: Concurrency in Clojure
Clojure has the most radical approach to concurrency of all the Java.next languages. This installment delves into some of the many facets of concurrency in Clojure, including the epochal time model and software transactional memory.
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15 Apr 2014
JVM concurrency: Java 8 concurrency basics
Java 8 incorporates new language features and added classes that give you easier ways to construct programs, including concurrent programs. Learn about new, powerful parallel-processing support in the language made possible by Java 8 extensions, including CompletableFuture and streams. You'll recognize similarities between these new features and some of the Scala capabilities that you explored in the first article of this series.
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08 Apr 2014
Java 8 language changes
Java 8 incorporates important new language features that give you easier ways to construct programs. Lamba expressions define a new syntax for inline code blocks that gives you the same flexibility as anonymous inner classes, with much less boilerplate. Interface changes make it possible to add to existing interfaces without breaking compatibility with existing code. Learn how these changes work together.
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08 Apr 2014
Java.next: Contrasting concurrency
Perhaps the starkest difference among the Java.next languages lies in threading, concurrency, and parallelism. This installment shows easy ways to make existing functional code in Scala, Groovy, and Clojure parallel. Then it investigates the actor currency model in Scala.
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31 Mar 2014
JVM concurrency: Java and Scala concurrency basics
The Java platform provides excellent support for concurrent programming in all JVM-based languages. Scala extends the concurrency support in the Java language with even more ways to share work among processors and coordinate the results. This first article in a new series on JVM concurrency covers the state of the art in concurrent programming in Java 7 and introduces some of the Scala enhancements. The article also helps prepare the way for understanding concurrency features in Java 8.
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25 Mar 2014
Generate DITA Java API reference documentation using DITADoclet and DITA API specialization
Combine DITADoclet and DITA API specialization to save time and still produce quality API documentation directly from the Java source code.
Also available in: Russian   Japanese  
17 Mar 2014
Java.next: Memoization and functional synergy
Both Scala and Clojure are functional languages, and Groovy includes many functional features through libraries. This Java.next installment explores how memoization is implemented in the Java.next languages and how the combination of functional features leads to concise power.
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18 Feb 2014
Java.next: Overcome synonym suffering
The previous Java.next installment ("Functional coding styles") compared and contrasted functional coding styles in Scala, Groovy, and Clojure. In this article, series author Neal Ford delves more deeply into the filter, map, and reduce functions in the Java.next languages. A series of short coding examples help you to sort out the somewhat confusing differences in how the three languages name these key functional constructs.
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28 Jan 2014
Transparent network acceleration for Java-based workloads in the cloud
Java Sockets over RDMA (JSOR) is a new communication library in the IBM Java 7 SDK for Linux platforms. JSOR can improve throughput and reduce latency for client-server applications in cloud environments by exploiting RDMA-capable high-speed network adapters. Learn about the technology underlying JSOR, find out how to use the library, and compare JSOR performance with solutions based on other communication protocols.
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28 Jan 2014
IBM Entrepreneur Week
IBM Entrepreneur Week is a one-of-a-kind opportunity for you to meet, interact, and connect with entrepreneurs, venture capitalists, industry leaders, and academics from around the world. If you're a startup or entrepreneur, join us onlne for our inaugural IBM Entrepreneur Week, 3-7 Feb 2014. There will be events taking place online and in locations worldwide, including face-to-face and virtual mentoring sessions, a women entrepreneur-focused event, and a LiveStream broadcast of the SmartCamp Global Finals in San Francisco.
15 Jan 2014
Implement responsive web design using WebSphere Portal, Part 3: Developing multi-channel portlets
Responsive Web Design (RWD) ensures a seamless user experience across multiple device types and form factors. For a truly adaptive and holistic site experience across devices, a responsive portlet user interface is essential. In this article, we discuss some of the more common yet complex portlet UIs and show how to use WebSphere Portal V8.0.0.1 to make them render seamlessly across devices, without having to maintain multiple code bases for each device type.
07 Jan 2014
Java.next: Functional coding styles
All of the Java.next languages include functional programming constructs, which enable you to think at a higher level of abstraction. However, differences in terminology among the languages can make it difficult to see similar constructs. This installment shows how common functional programming constructs manifest in the Java.next languages, pointing out some subtle differences in the implementation details of those features.
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24 Dec 2013
Eliminate banner grabbing in Apache Tomcat
Banner grabbing is often the first step before a full-blown cyber attack, but it's easy to prevent. Learn how to secure your Apache Tomcat installation against version-based exploits by overriding the default parameters in your Server.xml and ServerInfo.properties files.
Also available in: Japanese  
02 Dec 2013
Java.next: Currying and partial application
All of the Java.next languages include currying and partial application but implement them in different ways. This installment explains both techniques, distinguishes between them, and shows implementation details -- and practical uses -- in Scala, Groovy, and Clojure.
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26 Nov 2013
Developing mobile apps with Node.js and MongoDB, Part 1: A team's methods and results
Explore the advantages of using Node.js (server-side JavaScript) to develop systems of engagement. In this article, see the results achieved by an IBM Extreme Blue team who used Node and MongoDB with IBM Passes, an application that demonstrates the notion of systems of engagement. Their experience with Node and MongoDB provides interesting insight into how rapid application development can be achieved with these solutions that are starting to appear in the enterprise.
Also available in: Portuguese  
26 Nov 2013
Create a simple predictive analytics classification model in Java with Weka
Get an overview of the Weka classification engine and learn how to create a simple classifier for programmatic use. Understand how to store and load models, manipulate them, and use them to evaluate data. Consider applications and implementation strategies suitable for the enterprise environment so you turn a collection of training data into a functioning model for real-time prediction.
Also available in: Russian  
12 Nov 2013
Next-generation search and analytics with Apache Lucene and Solr 4
Apache Lucene and Solr are highly capable open source search technologies that make it easy for organizations to enhance data access dramatically. With the 4.x line of Lucene and Solr, it's easier than ever to add scalable search capabilities to your data-driven applications. Lucene and Solr committer Grant Ingersoll walks you through the latest Lucene and Solr features that relate to relevance, distributed search, and faceting. Learn how to leverage these capabilities to build fast, efficient, and scalable next-generation data-driven applications.
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28 Oct 2013
Verify and convert JSON payloads dynamically for cloud-based applications
This article presents a solution architecture that facilitates JavaScript Object Notation (JSON) validation and transformation for the benefit of cloud consumers and cloud service providers.
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02 Oct 2013
Java.next: Mixins and traits
The Java language's primary paradigm, object orientation with single inheritance, effectively models most but not all programming problems. The Java.next languages extend this paradigm in various ways, including mixins and traits. This Java.next installment defines the mechanisms that mixins and traits share, and it delves into the subtle differences between mixins in Groovy and traits in Scala.
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19 Sep 2013
IBM@JavaOne 2013: The IBM sessions
IBM is a regular supporter of the JavaOne conference, both as a sponsor and as a source of technical presenters. If you plan to attend JavaOne 2013, don't miss your opportunity to glean invaluable knowledge from IBM's Java experts and to learn about their vital contributions to the Java ecosystem. This article gives you an overview of the activities that the IBM team is involved in during the week of JavaOne in 2013.
Also available in: Chinese  
19 Sep 2013
Test cloud-based applications with Apache JMeter
JMeter is a powerful testing tool that you can use to test applications that run in the cloud. But managing and maintaining JMeter scripts can be challenging if you don't know how to use JMeter effectively. This article presents techniques that can help you implement well-designed, automated JMeter tasks in your cloud-based application testing.
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09 Sep 2013
Java.next: Extension without inheritance, Part 3
The Java.next languages Groovy, Scala, and Clojure remedy the Java language's extension limitations in numerous ways. This Java.next installment covers the astounding extension capabilities that are available through Groovy's metaprogramming facilities.
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03 Sep 2013
Mobile for the masses: Sign, seal, and deliver your Android app
By web logic, content is king; but for mobile users, interaction rules. Static information design is out for mobile apps, and gamification is in. This month Andrew Glover concludes his introduction to Android mobile development by adding a multiple-choice quiz feature to the example app, Overheard Word, introduced in a previous article. Then he shows you how to generate a digital signature and publish and promote your signed app on Google Play or Amazon Appstore for Android.
Also available in: Russian   Japanese  
03 Sep 2013
Build server-cluster-aware Java applications
Server clustering has become commonplace for highly scalable Java enterprise application development, but application-level server-cluster awareness is not currently part of Java EE. In this article, Mukul Gupta and Paresh Paladiya show you how to leverage two open source projects, Apache ZooKeeper and LinkedIn's Project Norbert, for server-group coordination in distributed enterprise Java applications.
Also available in: Chinese   Japanese   Spanish  
27 Aug 2013
Develop Spring Redis applications
Redis is a key-value NoSQL datastore solution. Spring Data Redis is a Spring portfolio project that helps Java developers build Spring applications with Redis, without needing to work directly with the low-level Redis API. This article introduces Redis and then shows how to build a simple dictionary application by using the Spring Data Redis API.
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21 Aug 2013

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