We assess the existing Java application with respect to the Java version, application server configuration, EJB and JPA usage, dependency graph, build toolchain (Ant, Maven, Gradle), and deployment. The result is a written migration roadmap that covers the risks involved in the process, the suggested migration approach, and the estimated time required for each step. The migration process does not begin without the approval of the written assessment.
We assist in the migration of Java-based applications developed on Java EE/Jakarta EE-based technologies to the Spring Boot framework. In this process, we replace the existing EJB session beans with Spring-managed components, JAX-RS/JAX-WS endpoints with Spring MVC/Spring WebFlux endpoints, JTA-based transactions with Spring-based transactions, and container-managed resources with Spring-native resources. The migration process retains the business logic of the application and frees it from the application server.
We assist in migrating applications running on JBoss EAP, Oracle WebLogic, and IBM WebSphere to lighter runtimes or containerized environments. This involves resolving dependencies on proprietary APIs and configuration, as well as validating application behavior on the new runtime prior to cutover.
We specialize in updating older Java applications, those still operating on Java 6+, to the most recent long-term support releases of Java. This process requires us to eliminate outdated APIs, address the module system issues that emerged with Java 9 and later, and ensure all dependencies are once again compatible. For larger code bases, we employ an incremental upgrade approach via intermediate releases.
To decompose the Java-based monolith into a number of microservices, which can be deployed independently, we use domain-driven design. The decomposition of the microservices doesn’t depend on any particular layer of the system, but rather on analysis of the business’s domain. The microservices are developed as independent components using Spring Boot as the framework. They are then containerized using Docker and deployed on a Kubernetes environment. For decomposing the monolithic system, we use the strangler fig pattern.
The migration of the Java-based application to the cloud-native environment is achieved through the use of infrastructure providers such as AWS, Azure, and Google Cloud. This is done through the following process: first, the Java-based application is containerized using Docker. Then, it is orchestrated using the Kubernetes environment. After that, the database is migrated to the cloud-native environment. Finally, the CI/CD pipeline is implemented to manage the migrated application.
We help in the migration of legacy databases of existing Java-based applications, including Oracle DB, IBM DB2, and earlier versions of MySQL or PostgreSQL, to modern managed database platforms. This involves database schema migration, modification of the object relational mapping layer, modification of existing stored procedures, and validation of existing data before and after the migration.
We revamp old SOAP/WSDL services and RMI interfaces, transforming them into RESTful or gRPC APIs. This process encompasses contract design, versioning, authentication, and thorough documentation. API modernization is key to successfully linking Java back-ends with contemporary front-ends and other services.
We refactor the code of legacy application codebases to remove technical debts that have been accumulated over the years without changing the external behavior of the system. The activities in this process involve the removal of duplicated code, the reduction of the code’s cyclomatic complexity, the replacement of outdated code, the modernization of dependencies, and the addition of automated tests. The refactoring process is done module by module based on the assessment.
We implement CI/CD pipelines for Java applications that currently rely on manual or semi-manual processes. We use Maven or Gradle as the build tool, JUnit and integration test frameworks for automated testing, and GitHub Actions, GitLab CI/CD, or Jenkins for running the pipelines.
We offer support and maintenance services for migrated Java applications, which include dependency and security updates, performance monitoring and optimization, bug fixing with root cause analysis, and infrastructure management. We offer support contracts with defined response service level agreements.
Patient management systems, electronic health record systems, and medical device integrations using Java EE-based architectures are migrated with particular focus on HIPAA compliance requirements.
Core banking systems, payment processing systems, and insurance policy management systems using Java EE-based WebLogic or WebSphere architectures are migrated with particular focus on transaction integrity.
Billing systems, provisioning systems, and customer management systems in the Telecom industry often use Java EE-based architectures. We have significant experience in migrating Telecom systems with a particular focus on high availability requirements.
Enterprise resource planning systems, production management systems, and other Java EE-based architectures in the manufacturing industry are migrated with particular focus on integration requirements with manufacturing execution systems.
Route optimization systems, fleet management systems, and shipment tracking systems using Java-based architectures are migrated with particular focus on scalability requirements.
Order management systems and customer-facing applications developed on old Java monoliths are refactored and migrated.
Content management and delivery systems developed on old Java EE platforms are refactored and migrated to containerized cloud-native applications.
Learning management systems and assessment systems developed on old Java stacks are refactored and migrated to new versions.
