Why glassfish

Because there is no file name, the name of the application is taken from the application-name or module-name entry in the Java EE standard deployment descriptor. If the application-name or module-name entry is not present, GlassFish Server creates a temporary file name and uses that name to deploy the application. If you are using the following preferred JSR 88 API, the name is derived from the application-name or module-name entry if present or the first portion of the file name without the.

Application and module versioning allows multiple versions of the same application to exist in a GlassFish Server domain, which simplifies upgrade and rollback tasks. At most one version of an application or module can be enabled on a server any given time. Versioning provides extensions to tools for deploying, viewing, and managing multiple versions of modules and applications, including the Administration Console and deployment-related asadmin subcommands.

Different versions of the same module or application can have the same context root or JNDI name. Use of versioning is optional.

The version identifier is a suffix to the module or application name. It is separated from the name by a colon :. It must begin with a letter or number. The following examples show valid version identifiers for the foo application:. A module or application without a version identifier is called the untagged version. This version can coexist with other versions of the same module or application that have version identifiers. Using the asterisk by itself after the colon selects all versions of a module or application, including the untagged version.

The following table shows example version expressions and the versions they select. The following table summarizes which asadmin subcommands are identifier-aware or expression-aware. All expression-aware subcommands are also identifier-aware. The create-application-ref subcommand is expression-aware only if the --enabled option is set to false.

Because the --enabled option is set to true by default, the create-application-ref subcommand is identifier-aware by default. The list-applications and list-application-refs subcommands display information about all deployed versions of a module or application. To find out which version is enabled, use the --long option.

At most one version of a module or application can be enabled on a server instance. All other versions are disabled. Enabling one version automatically disables all others. You can disable all versions of a module or application, leaving none enabled. The --enabled option of the deploy and redeploy subcommands is set to true by default. Therefore, simply deploying or redeploying a module or application with a new version identifier enables the new version and disables all others.

To deploy a new version in a disabled state, set the --enabled option to false. Module and application versioning in GlassFish Server is subject to the following restrictions and limitations:. Use of the --name option is mandatory for modules and applications that use versioning. There is no automatic version identifier generation.

GlassFish Server does not recognize any relationship between versions such as previous or later versions. All version relationships must be tracked manually. There is no limit to the number of versions you can deploy except what is imposed by disk space limits. A module or application in a directory should not be deployed twice with a different version identifier. To redeploy a module or application from a directory with a new version, you must use the --force option of the deploy subcommand.

Database tables created or deleted as part of deployment and undeployment are global resources and cannot be qualified by an application version. Be very careful when using global resources among versions of the same application.

Web sessions are preserved during redeployment of a new version. However, preserving sessions among different versions of the same module or application is complex, because the key used for session variables is the same for the old and new versions.

Resources are created with reference to a resource-adapter's module or application name. This means that an older version's resources do not automatically refer to a newer version of the module or application.

Therefore, you must explicitly create resources for a newer version of a module or application. GlassFish Server ignores duplicate exported global resources and lets deployment succeed.

OSGi already has its own versioning system. Therefore, when you deploy an OSGi bundle, GlassFish Server ignores any version information provided with the name but permits the deployment to succeed with warnings.

The deployment tools that are provided by GlassFish Server can be used by any user authorized as an administrator to deploy applications and modules into any GlassFish Server environment. However, effective application deployment requires planning and care.

Only the developer knows exactly what is required by an application, so the developer is responsible for initial assembly and deployment. Deployment Descriptor or Annotation Creation. The developer creates the deployment descriptors or equivalent annotations using Java standards and tools. With Payara Platform 5, we use Eclipse Transformer tools so that you can move to the Jakarta namespace incrementally Every specification must have been tested before it is released in order to prove that it is possible to implement it.

Otherwise, a specification could have some impossible requirements. The Jakarta EE specification contains several optional parts, so it must be tested on a runtime that implements all these optional elements.

GlassFish is, alongside the Payara Platform, the only Jakarta EE runtime that implements all the optional specifications. Since GlassFish is also a truly vendor-neutral product, it is at this current time used as the testing implementation of the Jakarta EE specification, and therefore it's used to verify the usability of each new release.

This is why GlassFish continues to be updated despite not being tied to a specific vendor or project team. However, although the GlassFish server is being updated, it is not maintained like other runtimes or given the necessary continuing attention between Jakarta EE releases. This means that, when there are newer versions of EclipseLink, Mojarra, or any other framework are released, they are not updated within GlassFish. This is in contrast with the Payara Platform, where we update the frameworks regularly so that fixes from libraries like EclipseLink and Mojarra are included.

Since each new GlassFish release is only created to verify the Jakarta EE specifications, there is also no company behind GlassFish supporting you and your team. It may be possible to obtain third-party support services, but this is not the same as having a fully supported application server, with support provided by the same team that works on development.

GlassFish has a long list of known bugs but they are not addressed by anyone. It is an open source project, so anyone can provide a fix for them voluntarily, but there is no project team to include them into the code base and provide another release.

What is GlassFish server open source? What is glassfish3? What is GlassFish Jersey? Do people still use Tomcat? Is Tomcat a Web server? Which server is best for Java? Is JBoss still used? Why do we use WildFly? What is JBoss server used for? How does application server work? Is Tomcat good for production? Who uses Tomcat? What is domain in GlassFish server? How can I tell if GlassFish is running? GlassFish GlassFish is the open source application server provided by Sun Microsystems for the applied science platform in Java.

Features and Resources GlassFish Server 4. Main Features GlassFish Server supports Java EE seven, which provides the basis for delivering dynamic and scalable hypertext language applications. Fast repetitive development Using fashion days, such as NetBeans and Eclipse, the web application development cycle is simplified for the browser-edit-save-update.

Benefits of Tomcat Server: The main benefit to this is flexibility. Tomcat has a lighter memory footprint, compared to Glassfish.

Tomcat is very popular for simple web applications, as compared to Glassfish. Both Tomcat and Glassfish are open sources and free, but they have different licenses. Glassfish is licensed with double, while Tomcat has a unique license. Author Recent Posts. Kitty Gupta. She has many years experience writing for reputable platforms with her engineering and communications background. Latest posts by Kitty Gupta see all. Kitty Gupta , February 22,