Strategy design pattern is widely implemented to achieve interchangeable algorithmic behavior at runtime. As we know strategy pattern uses aggregation or composition instead of inheritance. It is a behavioral design pattern. The behaviors are defined in separate interfaces and the encapsulating classes that implement this interface. Generally most of the SOLID principles can be identified from classes, and modules which...
Factory Design Patterns and Open-Closed Principle (OCP), the ‘O’ in SOLID
Factory Design patterns are Creational patterns and deals with how the objects are created. There are three design patterns, namely, Simple Factory, Factory Method and Abstract Factory design patterns. All these patterns hide the object creation process from the client and supply the objects without specifying the exact class of object that will be created. These patterns are widely used...
JAX-WS Exceptions and Faults: Annotation, Exception and Fault Handling Examples
JAX-WS exception and SOAP fault handling sometimes confuses a Java programmer. This article explains the handling of JAX-WS exceptions and SOAP Fault with examples. Here, we also check some of the common Exceptions such as “IllegalAnnotationExceptions. java.lang.StackTraceElement does not have a no-arg default constructor.“. This article also discusses the JAX-WS mapping of WSDL faults to Java exceptions, Java exceptions to...
Design Considerations: When Should We Use JSON instead of XML as Data-interchange Format?
As we know, JSON (JavaScript Object Notation) is a lightweight and text based data-interchange format that is used frequently replacing XML. The question is, when should we consider JSON instead of XML as the data interchange format? Table of Contents Few Points: JSON and XML JavaScript Runtime and JSON Performance & bandwidth Considerations Security and Standards Scalable Web APIs: Let...
Java Performance – String, StringBuffer and StringBuilder Memory and Runtime Analysis
We normally use many string instances in our applications. As we know String objects are immutable and their values cannot be changed after they are created. If you intend to use a string object that is dynamic, then StringBuffer or StringBuilder should be your choice. This is because both are mutable. String always creates a new object when you try...
How to Fix : java.security.cert.CertificateException: No name matching localhost found
How to Fix the exception ” java.security.cert.CertificateException: No name matching localhost found”, when client uses URL with “localhost” as host name to access some secure service over HTTPS? In this article we will check the root cause of the issue and will try two different solutions two fix the same. Table of Contents When Do You Encounter the Error :...
Logging or Tracing Web Service XML Request/Response with JAX-WS
How to Log Request and Response With Java JAX-WS web-service Server and Client? We have discussed many examples to develop secure web services with JAX-WS API and using the Metro web service stack. We also discussed how to enable Message Transmission Optimization Mechanism (MTOM) to optimize the data transfer between services and clients. In our previous examples we also created...
Secure Metro JAX-WS UsernameToken Web Service with Signature, Encryption and TLS (SSL)
Java Web Services Security: How to Secure JAX-WS UsernameToken Web Service with Signature, Encryption and TLS (SSL) Securing the data exchanged between web service producers and consumers is essential to ensure confidentiality, authenticity and integrity of critical business data. There are many approaches to implement Web Service Security (WSS) popularly called as WS-Security. WS-Security is an extension to SOAP to...
JAX-WS Secure Web Services with Signatures and Encryption: WS-Security with Metro and WSIT
Java Web Services: Create Secure JAX-WS Metro Web Service Signed and Encrypted Using Public-Key Cryptography Asymmetric Encryption Security is the primary concern when web services exchange critical business data. WS-Security is an is an extension to SOAP to apply security to web services. It is one of the main part of WS-* specification from OASIS. WS-Security focuses on XML Signature...
JAX-WS and Secure Java Web Services using UsernameToken : WS-Security with Metro and WSIT
JAX-WS and Secure Java Web Services using UsernameToken: WS-Security with Metro and WSIT Example This tutorial focuses on creating secure JAX-WS web service with UsernameToken WS-Security profile by using Metro and WSIT. You will learn how to create , deploy and run JAX-WS UsernameToken web service security example and UsernameToken jax-ws client. We will also create the service-side username and...
