Seedstack introduction (at the OW2Con)
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This presentation is an introduction to SeedStack that was shown at the 2016 OW2Con, when SeedStack joined the OW2 codebase.
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Seedstack introduction (at the OW2Con)
- 1. SeedStack The lean development stack Marius MATEI Adrien LAUER http://seedstack.org https://github.com/seedstack @seedstack 1
- 2. What is SeedStack ? A full-stack development solution A scalable architecture for enterprise software An extensible ecosystem of add-ons 2
- 3. Why SeedStack ? To avoid software pitfalls common in the enterprise: – Huge and complex monoliths – No standard for business code – Poor reusability – Poor dependency management And build a software strategy to address various business cases: Research & Development Manufacturing Trading Retail Digital Banking Infrastructure 3
- 5. A typical SeedStack Web application Java framework Web framework Add-on 1 Business framework Add-on 4 Add-on 2 Add-on 3 Add-on 5 Add-on 6 Add-on 7 REST APIs Application backend REST APIs Application frontend 5
- 6. Themes 6
- 8. An integration stack Leverages existing software into something greater than the sum of its parts Rely on standards where possible but can also integrate specific technologies Guice Apache Shiro JSR 330 JAX RS Java Mail JAX WS MQTT JMS Redis Mongo DB Elastic Search JPA Boot strap Require JS Angular JS I18n I/O Audit 8
- 9. Open-Source Business-friendly license: MPL 2.0 100% open-source: – Core frameworks – All official add-ons – Tools – Documentation (CC BY-SA) Copyright is held by collective « The SeedStack authors » Can be extended with proprietary add-ons without restriction 9 https://projects.ow2.org/bin/view/seedstack
- 10. Benefits A proven software architecture is defined and can be applied on all projects Commonplace technical challenges are addressed Business can contribute to software elaboration Components can be reused accross organization boundaries … and a real economic gain 10
Editor's Notes
- SeedStack is a full-stack solution enabling teams to accelerate and better frame developments. It includes the best Java/Web technologies and addresses the whole scope of development, from backend to frontend, including Domain-Driven Design guidelines and building blocks to create reusable business code. SeedStack promotes an architecture that scales from one developer to vast organizations. Architecture modular IT architecture systems becomes easy and you can scale this architecture according to the business requirements needs. SeedStack is simple for the newcomer yet powerful and extensible for the seasoned developer. You can compose you applications at every level : frontend, backend, and business via a rich API. SeedStack comes with a important add-on (plugin) ecosystem. This ecosystem is extensible for the benefits of each organizations. For example you can add your own internationalization feature, your own communication protocols, your own security model, etc...
- But why did we do this full stack ? Why did we consider that existing frameworks are not enough to companies? 1. We developed for years using the most common frameworks. Lacking opinion and being mere toolboxes, using these frameworks lead to huge and complex monoliths very difficult to improve and evolve. Every change in such systems became a headache and a money issue. 2. Our business code was lacking structure and we were reimplementing the same concepts and objects in each project. 3. The lack of a global software architecture and end-to-end modularity was making code reuse practically impossible. 4. Every developer is using its own favorite library without any global strategy. It became necessary to build a long-term software strategy. SeedStack is the implementation of such software strategy. It standardizes development around carefully chosen technologies and do so in a modular way. It gives the necessary guidelines for project teams and provides the building blocks to develop reusable business code accross the organization.
- Let’s take a look at the key components of SeedStack. It’s built around three frameworks and an ecosystem of add-ons. 1. A Java framework built around a kernel/plugins architecture. Each plugin has a well-defined responsibility and provides integration of a specific technology or service. The kernel do a one-pass scan of the classpath according to all plugins requests and provides to each of them the corresponding results. It also orchestrates the plugin lifecycle: init / start / stop. The Java framework multiple modules providing “core” Java technologies and services: Dependency injection with Google Guice CLI parsing Integration with Servlet 3+ Security with Apache Shiro JAX-RS 2 with Jersey Metrics and health checks Transactions … 2. A Business framework based on Domain-Driven Design principles and particularly on its tactical aspect. It provides a number of building blocks matching the DDD tactical pattern, to frame and speed-up business development: Value objects, entities and aggregates Repositories Factories Domain events Policies … 3. A Web framework which enables UI composition from reusable fragments. It provides: A common technical base for Web UI: AngularJS and RequireJS Base services like i18n or security An integration of several CSS frameworks like Bootstrap or Angular material Support for graphical themes Various UI components 4. The notion of add-on is built upon the end-to-end modularity of SeedStack. Each add-on provides a specific technology support: Persistence: JPA, MongoDB, Redis, Neo4J, … Communication: JAX-WS, JMS, MQTT, … Bridges: W20, Spring, … Or a well-defined feature: Dynamic i18n Application monitoring …
- SeedStack provides different project templates. It can be used for creating REST microservices, Web applications, CLI applications, batch jobs, etc… Here we are looking at a very common pattern, the traditional Web application: We have a backend based on the Java framework, the business framework and necessary add-ons. We have a Single-Page-Application (SPA) frontend based on a the Web framework and necessary add-ons. Communication between the backend and the frontend is done with REST APIs.
- Like said before, the Web framework supports theming and SeedStack provides several open-source ones: The simple theme which is little more than Bootstrap itself, The business theme which is built for the typical business application The material theme which is built around material design Anyone can design and package its own theme as a reusable add-on.
- We have an automatic tool to generate projects based on various templates: Web application, REST microservice, CLI application, Batch job, Reusable business domain. It allows to generate a working, deployable project in a few seconds.
- SeedStack is a modular integration solution augmented by a Domain-Driven Design approach for business code. This means that, while SeedStack provides various services on its own, it is mainly built around existing open-source technologies. It provides support for these technologies (injection, configuration, default behaviors, …) and allows them to work together seamlessly. Automatic activation of plugins, code pattern detection and convention-over-configuration means that you can add a module to your classpath and be ready to go. SeedStack relies on standards like JSR or RFC when possible but can integrate any technology. The time needed to write a technology add-on from scratch is between a day and a week, depending on complexity. Here you can see some open-source frameworks and libraries that are already integrated with SeedStack.
- SeedStack joined recently the OW2 code base. The project has a business friendly licence Mozilla Publica Licence 2.0. The whole project is now Open-Source: The 3 core frameworks, The 20+ official add-ons, The tools (maven plugin, project generators, archetypes), The documentation under the CC BY-SA licence. SeedStack can be extended by anyone, either by open-source contributions or add-ons or inside organizations by proprietary code. The license just ask for contributing back modifications to existing files. The copyright is held collectively by « The SeedStack authors ». We encourage you to do it, we have code samples and guides to help your start an add-on or a project. SeedStack adds to OW2 a new component : a whole modular Java development platform, with strong opinion and based on standard open source framework. It covers the User Interface development via JavaScript frameworks and adresses the most common project templates like microservices, web applications, standalone applications. Frames the business development of an application.
- More than 50 IT systems use SeedStack today. At a enterprise scale a lot of benefits were proven in the past 3 years: SeedStack usage globally improves project ROI (whereas in development or maintenance) Reusability is improved for technical components but also for business concepts. The DDD approach allows business people and developers to collaborate more effectively.