What&#x27;s new in the Sling developer tooling?

Sling is an established web application framework, with a multitude of core features and extensions. It has a very productive inner loop, with OSGi bundle deployment, JCR content editing and live configuration updates. The less-told story is how an application should be assembled, configured, deployed, and monitored. In this talk we will present the main approaches for bootstrapping, deploying, updating, and monitoring Sling-based applications, based on Open Source tools and libraries. The participants will gain a better understanding of the options available for managing their own Sling-based application and will be able to minimise the effort needed to manage such an application.

Sling Applications - A DevOps perspective

Java agents are a little-known but extremely powerful part of the Java ecosystem. Agents are able to transform existing classes at runtime, allowing scenarios such as logging and monitoring, hot reload or gathering code coverage. However, their usage presents a number of pitfalls as well. In this talk we will present the steps of writing a java agent from scratch, indicate various common mistakes and pain points and draw conclusions on best practices. Special care will be taken to discuss how running in an OSGi environment affects Java agents and how we can best approach integration testing in a modular environment. After this talk participants will have a better understanding of the Java instrumentation API, how it fits in with OSGi runtimes and about should / should not be done with it.

Will it blend? Java agents and OSGi

AEM as a Cloud Service is using the same battle-tested core of Sling, Felix and Jackrabbit Oak that you are used to. Many of the large-scale architectural changes, such as container-based deployments, separation of code and content, horizontal and vertical scaling, etc, are made possible by a host of reimplementations of APIs exposed by the open-source projects that serve as the foundation of AEM. In this talk we will explore a number of such extensions and their implications, such as Oak's principal-based authorization, getting up and running with the composite node store, or indexing in a separation of content and apps scenario. After this talk participants will have a better understanding of various under-the-hood changes present in AEM as a Cloud Service and their practical implications for AEM development. They will also be able to set up their own tweaked Sling instance so they can experiment with such a setup.

Escape the defaults - Configure Sling like AEM as a Cloud Service

Microservices were born out of a need to enable modularity at a technical and business level. With their mass adoption tehnical patterns and solution have started to emerge, and management using Kubernetes is one of the most encountered. Monitoring application state becomes tedious when using approaches designed for individual servers and deployments. Prometheus and Grafana are cloud-native solutions that make monitoring of Kubernetes deployments a simple and very fruitful task. After this talk participants will understand how to instrument their applications, gather metrics and act on high-level aggregate information.

Crash course in Kubernetes monitoring

Java agents are a little-known but extremely powerful part of the Java ecosystem. Agents are able to transform existing classes at runtime, allowing scenarios such as logging and monitoring, hot reload or gathering code coverage. However, their usage presents a number of pitfalls as well. In this talk we will present the steps of writing a java agent from scratch, indicate various common mistakes and pain points and draw conclusions on best practices. After this talk participants will have a better understanding of the Java instrumentation API and about should / should not be done with it.

Java agents for fun and (not so much) profit

Will it blend? Java agents and OSGi

Kubernetes is quickly becoming the de facto deployment platform for container runtimes. New applications can be written with containers in mind, but existing applications are not always aligned to the new best practices. In this talk we will present how an existing application can be deployed on a Kubernetes platform, exploring various patterns such as scaling out, centralised logging and monitoring, content distribution and persistence. After this talk participants will gain a better understanding about how existing applications can be molded into a cloud-native ones with reasonable effort.

Cloud-native legacy applications

Kubernetes is quickly becoming the de facto deployment platform for container runtimes. Sling provides a quick out-of-the box experience using the Starter jar, but this kind of setup is not always easy to deploy in containers. In this talk we will present how a Sling application can be deployed on a Kubernetes platform, exploring various patterns such as scaling out, centralised logging and monitoring, content distribution and persistence. After this talk participants will gain a better understanding about how Sling can be molded into a cloud-native applications without sacrificing the features that make Sling a strong development platform.

Cloud-Native Sling

Adobe Experience Manager as the biggest enterprise application built on the Apache Sling stack over the years was built with a monolithic product perspective. Taming the growth over time and tackling upcoming challenges led to a situation were a transition towards a modular product, where large features can be gracefully removed at runtime, becomes unavoidable. With this talk we want to provide insights on how Adobe uses the available technologies in the stack, extends the stack and transforms the own practices to cut the product in loosely coupled modules with minimal impact on existing consumers. We will be identifying patterns on OSGi, content and scripting side to eliminate and prevent hard wiring and highlight pending challenges and our thoughts on how to resolve that. Last but not least we will share our experience on how such a transition impacts our engineering flow and quality assurance practices.

From Monolith to Modules - breaking apart a one size fits all product into mo...

Microservices are quickly becoming one of the preferred deployment models in the software industry. Much has been said about the runtime impact of microservices, but less about how they impact the development process. This talk will discuss the details of moving from a single monolithic codebase to multiple repositories in terms of the development process. We will present the impact of modularisation on source control, continuous integration, code reviews, IDEs and public discussion on chat/email. After this talk attendees will have a better understanding on the impact of the development process of modular development.

Scaling up development of a modular code base

OSGi offers developers excellent tools for creating modular applications. We have come to have a good understanding of the runtime impact of modularity, but less has been spoken of the impact of modularity on the development process. This talk will discuss the details of moving a large OSGi project from a single monolithic codebase to multiple repositories in terms of the development process. We will present the impact of modularisation on source control, continuous integration, code reviews, IDEs and public discussion on chat/email. After this talk attendees will have a better understanding of the way they can improve their development process when dealing with OSGi or other kinds of modular applications.

Scaling up development of a modular code base

Microservices are quickly becoming one of the preferred deployment models in the software industry. Much has been said about the runtime impact of microservices, but less about how they impact the development process. This talk will discuss the details of moving from a single monolithic codebase to multiple repositories in terms of the development process. We will present the impact of modularisation on source control, continous integration, code reviews, IDEs and public discussion on chat/email. After this talk attendees will have a better understanding on the impact of the development process of modular development.

Scaling up development of a modular code base

In this session we'll show how the Composite Node Store, a new Oak feature, can be used together with Docker to perform blue-green deployments. This kind of setup allows to dynamically change a part of the repository (containing the application code), while leaving the content part untouched. The presentation and the demo will be based on the AEM, but the concepts and tools are generally applicable to all Sling-based applications. The building blocks we'll present can be used to develop other mechanisms for zero-downtime deployments.

Zero downtime deployments for Sling application using Docker

Microservices are quickly becoming one of the preferred deployment models in the software industry. Much has been said about the runtime impact of microservices, but less about how they impact the development process. This talk will discuss the details of moving from a single monolithic codebase to multiple repositories in terms of the development process. We will present the impact of modularisation on source control, continous integration, code reviews, IDEs and public discussion on chat/email. After this talk attendees will have a better understanding on the impact of the development process of modular development.

Scaling up development of a modular code base

Microservices are definitely the hot topic du jour . Everyone ( and their dog ) is using microservices or migrating towards them. However, the initial enthusiasm for microservices is starting to fade, and for many scenarios monoliths still seem to fit the bill. Even more interesting, in many situations a pure approach of using either microservices or monliths is not enough. Instead a more careful, intermediate approach can be quite powerul. This talk introduces the concepst of an API gateway for microservices as a means to adopt microservices at a more convenient pace. This approach brings about most of the benefits of microservices, but removes large chunks of complexity. We will touch upon authentication, authorization, API standardisation and logging, 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.

Do you really want to go fully micro?

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.

Effective web application development with Apache Sling

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.

Of microservices and microservices

Slide IDE Tooling (adaptTo 2016)

A product that works is not done, as there are many facets to consider – availability, scalability, security. Of those, security is probably the most expensive to get wrong. By analysing a simple web application built on top of Apache Sling and its threat model, we will review the main attack vectors and how they can be mitigated. You will see what the general approaches are and also how Apache Sling allows you to eliminate entire classes of vulnerabilities by using secure-by-default components. Although we will use Apache Sling for examples, previous knowledge of Sling or its components is not required.

Secure by Default Web Applications with Apache Sling

Más de Robert Munteanu (20)

Secure by Default Web Applications

Sling Applications - A DevOps perspective

Will it blend? Java agents and OSGi

Escape the defaults - Configure Sling like AEM as a Cloud Service

Crash course in Kubernetes monitoring

Java agents for fun and (not so much) profit

Will it blend? Java agents and OSGi

Cloud-native legacy applications

Cloud-Native Sling

From Monolith to Modules - breaking apart a one size fits all product into mo...

Scaling up development of a modular code base

Zero downtime deployments for Sling application using Docker

Scaling up development of a modular code base

Do you really want to go fully micro?

Effective web application development with Apache Sling

Of microservices and microservices

Slide IDE Tooling (adaptTo 2016)

Secure by Default Web Applications with Apache Sling

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ADR, or Architecture Decision Record, is a valuable tool in software development for several reasons. It provides a centralized location for documenting and tracking architectural decisions, aiding both current and future team members. ADRs enhance communication among team members by documenting the rationale behind architectural decisions, especially beneficial during onboarding of new team members or when revisiting decisions. They serve as a knowledge base, enabling teams to learn from past decisions and refine their decision-making process. Additionally, ADRs contribute to transparency by helping stakeholders understand the reasons behind specific architectural choices. As with any other tool or process, introducing them into an organization can face several obstacles, and overcoming these challenges is crucial for successful implementation. In this talk I go through some common problems and our way of solving them.

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