![]() ![]() This allows a developer’s restart time to decrease significantly in local development, sometimes up to 16x faster, meaning a developer can now test more frequently without using up as much time waiting for services to start. That low memory footprint lowers unwanted overhead on an application. Not only is Jetty going to provide simplified configuration and fully contained services that add to the increased scalability, but Jetty’s low memory footprint further increases the scalability. Therefore, teams that want to leverage development into the cloud or use a healthy amount of microservices without changing their application architecture in deployment into production lean toward Jetty. Jetty is lightweight free server with a low memory footprint that prides its self on excellent scalability, which helps development teams scale their application throughout their software development lifecycle. Jetty is used in a variety of different ways, from local development all the way to true enterprise deployment. Not only does the self-contained services simplify the deployment but plugins like Maven even further streamline their process because they can hard code, their configurations into their builds. That simplification can decrease the amount of time an application can take to start and run because the application is better contained and help promote a more microservice distributed architecture. Essentially, these advantages improve application development time specifically in development as developers are able to simplify their manual testing. Why would you ever run Jetty in your application as an embedded system? There are some distinct advantages, including better self-contained applications, the ability to test against server like application dependencies, more control of custom filters, headers and caching, and single object deployment. This allows you to not run an application in Jetty but to run Jetty in your application. This isn't really anything special, however, Jetty also has the functionality to operate as a servlet that is embedded in your existing application. What does that entail? Jetty has the ability to run an application like a traditional application server like Tomcat or Wildfly in what is called Standalone deployment. The Jetty server is also maintained and sponsored by the Eclipse Foundation How Does Jetty Server Work?Įarlier, I talked about Jetty having some unique deployment methods. Jetty is an open source Java web server, as well as a servlet container, that provides an application with the features required to launch and run an application servlet or API.Īs we will discuss in this blog, Jetty has some unique deployment methods that can provide many benefits to development teams. In this blog, we take a closer look at Jetty, how it works, what it’s used for, as well as provide tutorials for three use cases. So for example if you are using maven then add this profile to your web application pom.With components that are open source and available for commercial use, Jetty is a popular choice for Java development. This is a JRebel plugin which listens to classes being reloaded in JRebel and it flushes all the Scalate template classes to ensure that your template is recompiled against the latest code. The easiest thing to do is to just depend on the scalate-jrebel plugin in your web application. This is because by default JRebel is not aware of the source & classes directories used by Scalate to generate Scala code for each template and compile it. If you have templates which depend on Scala code thats reloaded by JRebel, it might be that the templates by default are not auto-reloaded by JRebel. Then as you edit your scala code it will be recompiled using Scala's incremental compiler, then JRebel will auto-reload any recompiled classes. Neat eh!įor example if you run the following in another shell mvn scala:cc Now if your code is compiled by your IDE or a build process, the classes are automatically reloaded on the fly. For example:Įxport MAVEN OPTS="-noverify -javaagent:$JREBELHOME/jrebel.jar” Set your MAVEN_OPTS environment variable to point to where you installed the jrebel jar. Here's how you can use it in a web application with Scalate. JRebel allows you to hot reload bytecode on the fly in your application without having to restart your web container. If you are building a web application you want to be able to create and edit Java and Scala code on the fly without having to stop and restart your web container for each code change. ![]()
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