Apache Sling : JCR, OSGi, Scripting and REST

The document provides 12 tips on Django best practices for development, deployment, and external tools. The tips include using virtualenv for isolated environments, managing dependencies with pip and requirements.txt, following a model-template-view framework, keeping views thin and logic in models/forms, and leveraging tools like Fabric, South, Celery, Redis, Sentry, and the Django debug toolbar. The document emphasizes following the Django philosophy and reusing existing apps when possible.

Flink Forward San Francisco 2022. In normal situations, the default Kafka consumer and producer configuration options work well. But we all know life is not all roses and rainbows and in this session we’ll explore a few knobs that can save the day in atypical scenarios. First, we'll take a detailed look at the parameters available when reading from Kafka. We’ll inspect the params helping us to spot quickly an application lock or crash, the ones that can significantly improve the performance and the ones to touch with gloves since they could cause more harm than benefit. Moreover we’ll explore the partitioning options and discuss when diverging from the default strategy is needed. Next, we’ll discuss the Kafka Sink. After browsing the available options we'll then dive deep into understanding how to approach use cases like sinking enormous records, managing spikes, and handling small but frequent updates.. If you want to understand how to make your application survive when the sky is dark, this session is for you! by Olena Babenko

A conceptula model for understanding Java logging frameworks presented at the South Africa Oracle Java Developer Conference, May 2012

LLAP (Live Long and Process) is the newest query acceleration engine for Hive 2.0, which entered GA in 2017. LLAP brings into light a new set of trade-offs and optimizations that allows for efficient and secure multi-user BI systems on the cloud. In this talk, we discuss the specifics of building a modern BI engine within those boundaries, designed to be fast and cost-effective on the public cloud. The focus of the LLAP cache is to speed up common BI query patterns on the cloud, while avoiding most of the operational administration overheads of maintaining a caching layer, with an automatically coherent cache with intelligent eviction and support for custom file formats from text to ORC, and explore the possibilities of combining the cache with a transactional storage layer which supports online UPDATE and DELETES without full data reloads. LLAP by itself, as a relational data layer, extends the same caching and security advantages to any other data processing framework. We overview the structure of such a hybrid system, where both Hive and Spark use LLAP to provide SQL query acceleration on the cloud with new, improved concurrent query support and production-ready tools and UI. Speaker Sergey Shelukin, Member of Technical Staff, Hortonworks

Presented by Kevin Nennig, AEM Technical Instructor, Adobe Experience level: Introductory In Adobe Experience Manager 6.1, a new approach has been taken for user generated content (UGC) for better security, higher availability, and ease of use for community members and administrators. The Social Resource Provider API for AEM Communities can be implemented 3 different ways to create a UGC cloud, two of which use a MongoDB backend. Utilizing MongoDB, companies can implement an on prem UGC common store with a Mongo and a Solr server. UCG is then stored and accessed from this UGC cloud. In this session we’ll explore the Social Resource Provider framework and implement the Mongo Social Resource Provider (MSRP) for AEM Communities.

Learn the best practices and advanced techniques. * Passing data to client libs, use the data attribute * Expression contexts, choose wisely * Use statement best practices, what fits best your needs * Template & Call statements advanced usage * Parameters for sub-resources, featuring resource attributes and synthetic resources

1) Alfresco replaces traditional shared drives with a virtual file system that provides better document management capabilities than a standard file system, including search, version control, metadata, and collaboration tools. 2) It utilizes a rules engine and smart spaces to automate processes like metadata extraction and workflow. Rules can be created to organize, structure, and enrich content. 3) Alfresco provides a virtual file system via several protocols like CIFS, WebDAV, and FTP to emulate a shared drive and allow dragging and dropping of files while also enabling server-side actions.

This document discusses Spring Boot, an open source framework for building microservices and web applications. It provides scaffolding to help build Spring-based services more quickly. The author chose Spring Boot for a project because it integrates well with other frameworks like Jersey and allows building services quickly. Key Spring Boot components discussed include REST frameworks, embedded servers, logging frameworks, security, and metrics. The author outlines their Spring Boot stack and package structure. They discuss using Spring Data for persistence, Swagger for API documentation, and helper libraries like Lombok. The document also covers testing approaches using REST Assured and Spring Integration.

1. The document discusses several popular JavaScript frameworks including AngularJS, Node.js, Agility.js, and Backbone.js. It provides overviews of each framework and their architectures. 2. AngularJS is an open-source framework maintained by Google that assists with single-page applications. Node.js is a platform for scalable server-side applications. Agility.js is a lightweight MVC library, and Backbone.js helps organize code for single-page apps. 3. Each framework has advantages like reusability, testability and being lightweight, though some have disadvantages like learning curves or added complexity. The document provides examples of applications that use each framework.

How to identify memory leaks in java applications, thread contentions, using jdk in built tools to identify performance bottlenecks

The document discusses using Maven for automation builds. It covers quick starting a Maven project, the Maven lifecycle and phases, dependency and plugin management, and integrating Maven with IDEs like Eclipse. Key points include how to create a basic Maven project, the different Maven directories, common Maven commands, using the Surefire plugin to run tests, and configuring test dependencies.

React Hooks are functions that allow you to "hook into" React state and lifecycle features from function components. Some key hooks include useState, useContext, and useEffect. Hooks make it easier to reuse stateful logic between components and simplify component logic. However, hooks should only be called from React functions and not in loops, conditions, or nested functions. Overall, hooks provide more powerful features to function components and opportunities to write code in a more functional style.

Video of the presentation: http://www.youtube.com/watch?v=8z3h4Uv9YbE At LinkedIn, we have started to use the Play Framework to build front-end and back-end services at massive scale. Play does things a little differently: it's a Java and Scala web framework, but it doesn't follow the servlet spec; it's fairly new, but it runs on top of robust technologies like Akka and Netty; it uses a thread pool, but it's built for non-blocking I/O and reactive programming; most importantly, it's high performance, but also high productivity. We've found that the Play Framework is one of the few frameworks that is able to maintain the delicate balance of performance, reliability, and developer productivity. In the Java and Scala world, nothing even comes close. In this talk, I'll share what we've learned so far, including details of rapid iteration with Java and Scala, the story behind async I/O on the JVM, support for real time web apps (comet, WebSockets), and integrating Play into a large existing codebase.

This presentation: * covers basics of caching and popular cache types * explains evolution from simple cache to distributed, and from distributed to IMDG * not describes usage of NoSQL solutions for caching * is not intended for products comparison or for promotion of Hazelcast as the best solution

An opinionated position on JVM performance tuning with practical application. Includes expertise from Jason Goth

10번째 DevMeetup 발표. DevMeetup은 Yello Finance Group내의 개발자 문화증진을 위한 행사.

Introduction to memcached, a caching service designed for optimizing performance and scaling in the web stack, seen from perspective of MySQL/PHP users. Given for 2nd year students of professional bachelor in ICT at Kaho St. Lieven, Gent.

This is the presentation from JavaOne 2011 that Ruben Reusser and I worked on. The presentation was heavily demonstration based, so there are not as many slides.

Apache Sling is an innovative web framework built on top of the Java Content Repository (JCR), that uses OSGi for its component model and fosters RESTful application design. This talk shows how Sling integrates various standard-based technologies, like OSGi and the Content Repository API for Java to create a coherent framework for web application development. We will walk through the development of a simple application with minimal effort and demonstrate how to productize the resulting application. We will pay special attention to some approaches which are not yet part of mainstream development, such as using OSGi for dependecy injection and JCR for persistence.

Sling is a RESTful web application framework that uses JCR repositories like Apache Jackrabbit as its data store. Sling maps HTTP requests to content resources in the repository and uses the resource type to locate the appropriate rendering script. The request URL is decomposed into the resource path, selectors, extension, and suffix path. Sling searches for a node matching the resource path and then locates a script based on the resource type and any selectors. Sling scripts cannot be called directly and must be resolved through the resource to follow REST principles. This document discusses how Sling maps URLs to content resources and scripts to process requests.

This document discusses an overview of Apache Sling, including quick facts about its history and community, its conceptual foundations as a REST-based and content-driven framework powered by OSGi and scripting, its main building blocks like resource providers and JCR, and how to build Sling applications by modeling content in JCR, accessing resources, using templating with Sightly, extensions, deployment and tooling.

Sling Models allow for dependency injection and adaptation of Sling objects into POJOs using annotations. This document discusses how Sling Models work, the annotations used to configure them, standard injectors, and how to use Sling Models with Sightly and JSP. It also provides a live demo and references for further information.

This document provides an overview and introduction to the Apache Sling framework. It discusses why Sling was created, its architecture built on OSGi, JCR, and REST standards, and how it provides a content-centric approach. Key benefits of Sling include its modular design, support for multiple programming languages, and use by major companies for applications like digital asset management and wikis.

The document describes Apache Sling, an OSGi-based application framework for building RESTful web applications on top of a content repository. It uses Apache Sling to build a sample coffee shop ordering application called Slingbucks. The application is built with only a few hundred lines of Java code and uses content to define things like coffee options and styles rather than hardcoding them. Apache Sling promotes the principle that "everything is content" and enables building full-featured applications with relatively little code by leveraging out-of-the-box HTTP services and the ability to extend functionality through OSGi plugins.

Apache Sling is an innovative web framework built on top of the Java Content Repository (JCR), that uses OSGi for its component model and fosters RESTful application design. This presentation will showcase how the Apache Sling framework can be used to build a unified REST-based middleware for multiple data sources, such as MongoDB, Apache Cassandra, Apache Jackrabbit Oak or classical relational databases. In doing so it will present the benefits that come from a single Resource API over multiple data stores, both at the library level and at the HTTP boundary.

Apache Jackrabbit is just about to reach the 3.0 milestone based on a new architecture called Oak. Based on concepts like eventual consistency and multi-version concurrency control, and borrowing ideas from distributed version control systems and cloud-scale databases, the Oak architecture is a major leap ahead for Jackrabbit. This presentation describes the Oak architecture and shows what it means for the scalability and performance of modern content applications. Changes to existing Jackrabbit functionality are described and the migration process is explained.

Introduction into service oriented web development using OSGi, includes latest Declarative Services (DS) and the Http Whiteboard Specification.

This talk presents the simple yet powerful way of dependency injection as defined by the OSGi Compendium Declarative Services specification. Besides covering the basics of Declarative Services this talk also explains the many useful additions of the Declarative Services 1.1 in OSGi R 4.2.

A short introduction to reactive applications. This document details different traits of reactive applications and some of the languages that help implement them.

Apache Sling is an innovative REST based Web Framework which has been developped from the ground up as an OSGi based server side application. After a short introduction to Sling itself I will also show why OSGi has been chosen as the basis for the application.

The document discusses using Apache Sling for modern operations. It describes using Docker and Fig to set up a cluster of stateless and elastic Sling instances that can scale. While Sling works well with some modern operations approaches, dynamic service discovery and handling eventual consistency between instances need more work. The full potential of Sling for modern operations can be unlocked with further testing and development.

Microservices are definitely the hot topic du jour . Everyone ( and their dog ) is using microservices or migrating towards them. To make things more interesting, the OSGi community has been talking about microservices for 6 years now, so now we have two clashing definitions of the term. Besides the dreaded monolith and the famed microservices-based architecture there is plenty of room for a middle ground, where an API gateway mediates between a host of microservices and their consumers. Such a gateway solves multiple cross-cutting concerns, such as authentication, API standardisation, logging and decoupling the API evolution. As it turns out, OSGi is an ideal setting for building such an application. The API gateway implementation demoed is based on Apache Sling - an innovative web framework built on top of the Java Content Repository (JCR), that uses OSGi for its component model and fosters RESTful application design. Although we will use Apache Sling for examples, previous knowledge of Sling or its components is not required.

CQ5 and Sling provide an overview of content management systems and frameworks. CQ5 is a content management system built on Apache Sling, which is an applications framework for JCR content repositories based on OSGi. Sling allows for dynamic modules and services and fosters modular code. Together, CQ5 and Sling provide a flexible and powerful way to manage content on a website through a content-centric approach where everything is treated as content.

Sling is a RESTful web framework for building applications on top of Apache Jackrabbit. It allows resources like content, configurations, code, and binaries to be accessed over REST URLs. Sling maps URLs to resources rather than commands, supports various scripting languages as servlets, and has a modular OSGi-based architecture powered by Apache Felix. Examples shown include building a blog and coffee ordering application on Sling to demonstrate how it supports RESTful content creation and management.

Apache Sling as a Microservices Gateway --- Microservices are definitely the hot topic _du jour_ . Everyone ( and their dog ) is using microservices or migrating towards them. However, there is a gap between the enthusiam for microservices and the ability to create and maintain the infrastructure and culture to effectively use microservices. Apache Sling is an innovative web framework built on top of the Java Content Repository (JCR), that uses OSGi for its component model and fosters RESTful application design. And, as we will see, it is also perfect match for a microservices gateway. In this talk we will review the pros and cons of microservices and monoliths, and look for middle road that smaller organisations that follow to use services productively. One of the approaches we will outline and demo is an API gateway built on top of Apache Sling, used to adress the cross-cutting concerns that would otherwise be reimplemented by all microservices.

The document discusses key maintenance activities for an AEM implementation including backup, compaction, purging, cloning, and other approaches. It provides details on planning and executing online and offline backups, online and offline compaction, version purging, workflow purging, audit log purging, and cloning publish instances. The document emphasizes the importance of backups, compaction, and purging to optimize storage usage, improve performance, and maintain an optimal AEM instance.

This document discusses Sling Models, which provide a simplified way to adapt Sling resources and other objects into domain models. Key points: - Sling Models use annotations to inject properties from resources and other sources into POJOs rather than requiring custom adapter factories. - Common annotations include @Model, @Inject, @Optional, @Source, and @Filter to customize property injection. - Sling Models are included in AEM and their usage has simplified adapting resources from over 30 lines of code to just 13 lines. - The API supports extensions like custom injectors, annotations, and future additions like grandchild resource lists.

This document discusses content management using Apache Jackrabbit, a Java Content Repository implementation. It provides an agenda for the discussion, including an overview of JCR and Jackrabbit, content modeling techniques, using references and search features, and a sample music application to demonstrate JCR capabilities. The document concludes with opening the discussion to questions.

My presentation about JCR and Apache Jackrabbit from the ApacheCon US 2009, November, in Oakland, CA.

This document discusses integrating rich media like video into technical documentation generated from DITA. It describes using the <object> element in DITA to embed Flash video but notes problems with this approach. It then introduces the SwfObject and playlist methods as better solutions. SwfObject uses JavaScript to embed Flash without breaking validation, and playlists allow centralized media management and metadata.

Corona SDK is a software development kit that allows developers to code mobile apps faster using the Lua programming language. Lua is an industry standard scripting language that is simple yet powerful. Corona allows developers to write their code once and deploy their apps to multiple mobile app stores.

This document summarizes a presentation about Memcached and using the cloud. It discusses how Memcached alleviates database load for dynamic web applications by caching objects in memory. Using the cloud allows sites to leverage elastic, on-demand resources and pay only for what they use. The document recommends designing systems to be loosely coupled and resilient to failures when using the cloud. It presents two use cases - a system entirely in the cloud using Memcached and EC2 instances, and a hybrid model with an on-premise Memcached cache. Gear6 is introduced as a commercial distribution of Memcached optimized for use in the cloud.

This document is about Ruby on Rails. It introduces RubySapporo and provides information about Ruby and Rails. Key points discussed include how Rails uses conventions over configuration, Don't Repeat Yourself principles, the MVC framework, and components like ActiveRecord and controllers. Links are provided to resources about Ruby, Rails, and an upcoming Sapporo workshop.

The document outlines a 6-month curriculum for project-based training in .NET and related technologies. It covers topics such as introduction to .NET, C#, object-oriented programming, databases, ADO.NET, ASP.NET, web services, and JavaScript. It also includes advanced topics like remoting, reflection, assembly and deployment, and specialized topics like WPF, WCF, and WF. The curriculum aims to provide hands-on experience through a culminating live project.

Memcached has become a critical tool in the web technology stack. High traffic web sites with dynamic content - like Facebook, Twitter, and Wikipedia - rely on Memcached to scale and ensure “snappy” site performance. This presentation willl cover a brief overview of Memcached, then dive into the evolution of Memcached’s use in dynamic web sites and how you can scale your site and get better performance with Memcached. We’ll also review emerging architectures and tools of high performance, large scale dynamic websites. In this webinar you will learn best practices used by some of the hottest sites and get tips on how to avoid potential pitfalls when scaling. Whether you're just building the infrastructure for a brand new site or have a large dynamic site with millions of users, this webinar is for you.