Apache Tomcat vs. JRebel

Tomcat is more than enough to deploy most of the mid-end web applications without any problem but for the high-end applications which require high scalability and high availability, which might need some tune-ups with the support of expertise in this regard. Otherwise, you may realize numerous performance issues, memory leaks, server crashes etc.

Incentivized

I recommend JRebel for Java developers, it will remove the time needed for redeployment, it will increase the focus on the task at hand (without being distracted by the redeployment) and will make them happier. I recommend JRebel for Java Development Managers, they should purchase this for their teams - it will increase productivity, decrease the product's time to market, and it will save money for the company. The ROI can be calculated upfront and presented to higher level management for approving this, if needed.

Incentivized

• Fast to start up, which is useful when we need to just check that our changes are working correctly.
• Free, which allows us to not be involved with the finance/legal team about using it.
• Bundled with Spring Boot, which makes it even more convenient for our testing.

Incentivized

• Removes the time needed for redeployments of the source code - improves productivity, time to market, and saves money.
• Easy to install
• License renewals - the sales department reaches out to you long before the licenses expire so you can have time to get your approvals.
• Analytics and reporting - it will show you the time saved by JRebel and even the ROI, if you input the average hourly cost of a developer.

Incentivized

• tomcat is just part of the J2EE specification implementation, majorly focusing on the servlet (front-end) part. If you requires the full J2ee stack, like EJB support, you need consider other containers like Weblogic
• tomcat's cluster level support is very limited
• tomcat's admin/configuration is not so intuitive, and default logging needs a lot of improvement

Incentivized

• Launch times are where JRebel is slower than Instant Run.
• Sometimes, it has incompatibilities with how you wrote something and causes compile failures, but Zero turnaround is quick to respond.

Incentivized

We have a huge knowledge of the product within our company and we're satisfied with the performance.

Incentivized

Tomcat has a very rich API set which allows us to implement our automation script to trigger the deployment, configure, stop and start Tomcat from the command line. In our projects, we embedded Tomcat in our Eclipse in all of the developer's machines so they could quickly verify their code with little effort, Azure Webapp has strong support for Tomcat so we could move our application to Azure cloud very easy. One drawback is Tomcat UI quite poorly features but we almost do not use it.

Incentivized

Tomcat doesn't have a built-in watchdog that ensures restart upon failure, so you have to provide it externally. A very good solution is java service wrapper. The community edition is able to restart Tomcat upon out of memories exceptions.

Incentivized

Tomcat support to customize memory used and allow us to define the Connection pool and thread pool to increase system performance and availability, Tomcat server itself consume very little memory and almost no footprint. We use Tomcat in our production environment which has up to thousands of concurrent users and it is stable and provides a quick response.

Incentivized

The performance of JRebel is great. It is enabling the Java team to do hot re-deployments and it has to be transparent and fast for the user, otherwise the whole purpose of reducing wasted time with re-deployments doesn't make sense. Also the User Interface for License Server management and analytics loads fast and the navigation through pages is quick.

Incentivized

Well, in actuality, I have never needed support for Apache Tomcat since it is configured and ready-to-go with no configuration needed on my end.

Incentivized

Commercial application servers are available that support enterprise application needs, but many times this is overkill for most web applications running in the cloud, particularly for independent software vendors. The capabilities and management tools provided with these applications are superior to Tomcat, but most times unnecessary for the vast majority of web applications developed in Java.

Incentivized

Hot code swapping doesn't have many players...it's mainly JRebel. We use JRebel a lot in our backend code development where it minimizes our development cycle (20min down to 30sec). For Android, the competitor is Android Studio's Instant Run which works fairly well now. For smaller apps, Instant Run is faster deploying but needs more full builds. With JRebel, you hardly ever need to do a full build.

Incentivized

It's very easy to add instances to an existing deployment and, using apache with mod proxy balancer, to scale up the serving farm

Incentivized

• It has simplified administration efforts, thus saving much time to focus on other projects and issues.
• It saves us in costs, as there are no licensing requirements.
• It gives us the ability to manage all of our java applets in one place, so as to be able to host both development and production systems on one server.

Incentivized

• It sped up the developing time, and time is money for the company.

Incentivized