A Web project must, for example, contain a Web content directory that contains all the content for the project everything except source code. If the code is structured in such a way for the build process to bundle the different modules into J2EE artifacts, then the implications might be that existing code organization will have to be changed as a part of the migration effort.
All applications require standard J2EE deployment descriptors as web. In addition to these, there are also application server specific deployment descriptors that some applications will need to run within the container. The application server specific deployment descriptors do not conform to any standards and hence they vary between the J2EE container implementations. The extended deployment descriptors also referred to as deployment plan in the Geronimo world provide more information about the application to the container.
Any number of security realms can be configured and each application module has to specify in its deployment plan the name of the security realm to be used. This limits the ability to do single sign on and identity propagation to downstream servers.
The security realms are enforced using JAASLoginModules, which provides the capabilities of prompting the user for username and password, and for creating the JAAS subject with the principal for that user. All the security realms are configurable via deployment plan. Information on Geronimo security will also apply to Community Edition. WebSphere Application Server provides a default security realm that can be set and used for the entire server.
The same realm can be shared between WebSphere administration and for application security authentication and authorization. The security realms are enforced by means of four types of UserRegistry:. As the names indicate, the user registries are for disk based, LDAP, and local operating system authentication.
The more complex security requirements can be addressed using the CustomUserRegistry. Further, if you have written your own JAASLoginModule, you can leverage the same within WebSphere Application Server by configuring them through the admin console or through using scripts.
Changes in the security implementation do not warrant any changes in the application code itself since they are all being enforced by the J2EE container using the JAAS standards.
If all the JNDI lookups within the application are local context lookups contained within the same EAR , then this will not affect the application code.
WebSphere Application Server uses the context factory com. If you are using an external persistence mechanism such as Hibernate or iBatis , you will be able to retain the persistence model without any changes and run it within WebSphere Application Server by deploying the dependent libraries as a part of the application. WebSphere Application Server treats third-party libraries the same as your application code. Libraries composed of "just Java" code should continue to work without modification on WebSphere Application Server.
However, many libraries do have dependencies on particular versions of the dependent libraries for example Xerces or Xalan. As part of the migration effort, it is imperative that the third party library or framework be compatible to work within WebSphere Application Server.
Compatibility should be tested thoroughly -- and early in the migration cycle -- in case alternatives need to be sought. Community Edition is designed to bootstrap development teams and agile enterprises to quickly get started with the application development and deployment process. It is possible to get Community Edition installed and up and running including downloading within a matter of minutes.
Part of the appeal of the Apache Geronimo project is the ability to customize the runtime to suit the application being deployed on to the server. A simple administrative console is also available to view the current status of the application and to manage the running components within the application server. Installing WebSphere Application Server is a larger effort. To install a large enterprise may take some time and skilled personnel to complete.
WebSphere Application Server Base installation is tuned out of the box to initially run enterprise applications with little or no tuning at all. Any task related to administration and management can be done through Web-based administration console or wsadmin scripts. See the Information Center for more information on installation and administration. Community Edition and WebSphere Application Server installations can co-exist on the same physical servers as long as the ports used by these servers do not conflict.
The run time processes are individual JVMs and as long as the physical server has enough memory and hard disk, they can be run alongside each other. When referring to the run time environment, it is the production environment that most people think of first, but the run time environment should be thought of as more than that; it includes your development testing, system testing, performance, and pre-production testing as well.
Considering that many developers and enterprises may use Community Edition as their test platform, it is important to consider the strategy for migrating the run time environment.
As mentioned above, the easiest run time migration approach is to make Community Edition and WebSphere Application Server co-exist on the same hardware until the development and the test teams are comfortable with the new systems to which they are migrating. Once the new processes are in place for deploying to WebSphere Application Server, then Community Edition can be shut off and removed from the system, if desired. The same approach can be followed for the production environment as well.
Again, the co-existence strategy assumes that there will no port conflict and the physical system s has the capability to support two servers or processes running simultaneously on the same machine. Before you decide to build out your WebSphere Application Server environment, your team should become familiar with the different WebSphere deployment topologies that will ensure the best high availability and scalability options for your applications.
Every organization and application is different, and so the migration experience will be as well. The migration path is a natural progression as your organization and applications grow in size and complexity, and a more scalable, highly available, and full featured platform becomes more of a competitive requirement to successfully achieve your business objectives.
Offline documentation Purchase support Product support. Legend External Link Opens in a new window. The table below details the open source projects integrated into Apache Geronimo see the open source list for more information : Specification required for J2EE Area of coverage Project or code used by Apache Geronimo Servlets 2. Figure 1. WebSphere product family WebSphere Application Server Community Edition is an extremely practical and beneficial option for customers, enabling them to get started quickly with their J2EE application development without any licensing costs.
Instead, migration should be thought of in broader terms, and must at least consider: Development environment Developer skills Required and recommended changes to the application code Administrator skills Run time environments.
Migration roadmap Migration must consider all aspects of enterprise application ownership. At a high level, your migration plan should cover the following areas: Migration assessment Development environment Skills Application code Run time environments.
Please let me know. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. The analyse of the error Reproduce the error Before we dive into the analyse we need an example project to reproduce the error.
The wsadmin ant tasks do the follwoing: Validate ant-properties e. Parse the setupCmdLine. Create command line arguments for a new java process Create a new java process based on the main class com.
Active 8 years, 9 months ago. Viewed 3k times. Helen Add a comment. Active Oldest Votes. For Websphere 6. The Actual Websphere Ant tasks are defined in wsanttasks. Rob Kielty 7, 7 7 gold badges 37 37 silver badges 50 50 bronze badges. Dinesh Manne Dinesh Manne 1, 6 6 gold badges 23 23 silver badges 32 32 bronze badges. Possible scenario: you want to build and deploy but you don't want to install WAS on the build machine - say its a jenkins node for example.
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