Ondro Mihályi @OmniFishEE Piranha Cloud From Eclipse GlassFish to super fast Cloud and Serverless Java

Ondro Mihályi @OmniFishEE Application servers Designed for reliability and security Provide a lot of robust features Designed for management during runtime Designed to run for a long time (and restart rarely)

Ondro Mihályi @OmniFishEE Application servers Therefore Are usually slow to start

Ondro Mihályi @OmniFishEE Java startup time Plain Java starts fast In milliseconds, way faster than application servers

Ondro Mihályi @OmniFishEE How fast can Jakarta EE be? Anything close to plain Java start-up times?

Ondro Mihályi @OmniFishEE What is Jakarta EE (formerly Java EE) Just an API Common API provided by many servers Collection of smaller APIs Boot time an implementation detail

Ondro Mihályi @OmniFishEE API versus implementation Learn and use a single API Choose from multiple implementations

Ondro Mihályi @OmniFishEE API versus implementation Learn and use a single API or...

Ondro Mihályi @OmniFishEE Eclipse GlassFish Opensource Jakarta EE Full Profile app server Robust Lot of features Easy management

Ondro Mihályi @OmniFishEE History of GlassFish 2006-2012 – supported by Sun MS, later Oracle 2013-2017 – maintained by Oracle, no support 2018-now – maintained within the Eclipse Foundation ● supported by multiple companies 2022 – Eclipse GlassFish 7 provides Jakarta EE 10

Ondro Mihályi @OmniFishEE The current status of GlassFish Jakarta EE 10 Java 11 to 18 MicroProfile Config Jakarta MVC Embedded GlassFish Lots of fixes and new tests

Ondro Mihályi @OmniFishEE GlassFish Embedded Start from a Java app GlassFishRuntime.bootstrap() .newGlassFish().start(); Faster startup Simple Flexible

Ondro Mihályi @OmniFishEE Built on well‑known projects GlassFish is modular Jersey (REST) Eclipselink (JPA) Tyrus (WebSockets) Weld (CDI) Exousia (Authorization) Eleos (Authentication) Expressly (EL) Transact (JTA) WaSP (JSP) More modules extracted

Ondro Mihályi @OmniFishEE Piranha Cloud Introducing Piranha Cloud Exousia (Authorization) Eleos (Authentication) Expressly (EL) Transact (JTA) WaSP (JSP) Jersey (REST) Eclipselink (JPA) Weld (CDI)

Ondro Mihályi @OmniFishEE Piranha Cloud Opensource Subset of Jakarta EE APIs Bare‑bone Fast Highly extensible

Ondro Mihályi @OmniFishEE Architecture of Piranha Cloud Bare‑bone Servlet container Jakarta EE profiles Extensions to add features Servlets to add features

Ondro Mihályi @OmniFishEE Piranha Cloud extensions Jakarta EE Pluggable functionality Extension groups From GlassFish and other projects Hazelcast, third-party extensions More extensions in a single one

Ondro Mihályi @OmniFishEE Piranha Cloud distributions Executable JARs Package multiple extensions Embed HTTP server Run from command line Coreprofile Webprofile Piranha Server

Ondro Mihályi @OmniFishEE Embedded Piranha var piranha = new EmbeddedPiranhaBuilder() .servletMapped(MyServlet.class, "/") .build(); piranha.start(); var httpProc = new HttpWebApplicationServerProcessor(piranha); var httpServer = new DefaultHttpServer(8080, httpProc, false); httpServer.start();

Ondro Mihályi @OmniFishEE Embedded Piranha without HTTP listener var piranha = new EmbeddedPiranhaBuilder() .servletMapped(MyServlet.class, "/") .build(); piranha.start(); var request = new EmbeddedRequestBuilder().build(); var response = piranha.service(request); System.out.println(response.getResponseAsString());

Ondro Mihályi @OmniFishEE Piranha Server architecture Piranha Server HTTP listener Embedded Piranha App 1 Embedded Piranha App 2 Embedded Piranha App 3 /app1 /app3 /app2

Ondro Mihályi @OmniFishEE Comparison of startup times (Simple app with a single Jakarta EE Servlet)

Ondro Mihályi @OmniFishEE Where startup speed matters? Serverless Minimize cold starts Remove what’s useless Optimize what’s left

Ondro Mihályi @OmniFishEE Piranha in AWS Lambda No HTTP listener Init in static block Starts fast Custom Java 17 layer (for now)

Ondro Mihályi @OmniFishEE Comparison of startup times – close up (Simple app with a single Jakarta EE Servlet)

Ondro Mihályi @OmniFishEE Conclusion? Same Jakarta EE APIs, implementations differ GlassFish has improved Jakarta EE not slow, servers are slow Piranha goes where GlassFish can’t get

Ondro Mihályi @OmniFishEE Questions

Ondro Mihályi @OmniFishEE OmniFish - Jakarta EE Consulting & Support Jakarta EE Consultancy (migrations, tuning) Jakarta EE Application Development GlassFish Server Support omnifish.ee Jakarta EE Training