Skip to main content

JAX-RS Jersey Client Example With Post

Let's take example of the operateXMLNumbers restful service, which excepts data in XML format and also returns data in XML format. This service is simple and add two numbers and returns the data.
Following show's the service method written using Jersey. Notice that the parameter is mapped object type
The Full code can be found at google code.

Service Method

 public MathResponse addTwoXMLNumbers(MathRequest rq) {
     String numa = rq.getOperandA().toString();
     String numb = rq.getOperandB().toString();
     String operator1 = rq.getOperationTypeNew();
     Integer result = doCalculateCoreLogic(operator1, numa, numb);
     MathResponse rs = new MathResponse();
     return rs;

   private static void callTwoXMLNumbers() {
 Client client = Client.create();
 WebResource webResource = client.resource("http://localhost:8080/MyJRS2/rest/");
 MathRequest rq = new ObjectFactory().createMathRequest();
 rq.setOperandA(new BigInteger("100"));
 rq.setOperandB(new BigInteger("100"));
  MathResponse response = webResource.path("calculate").path("operateXMLNumbers")
        .post(MathResponse.class, rq);

 System.out.format("Output from Server .... Result = %s \n" ,response.getResult() );
Using WebResource we are specifying that the mediatype is application/xml and mathod is the post method. We are specifying that, upon posting rq data we are expecting MathResponse type data back from service. All the marshalling and unmarshalling is taken care by JAXB, and we can simply play with objects.


Popular posts from this blog

Masking Credit Card number in Java

Sometimes we need to mask crucial information like Credit Card Numbers, CVV numbers etc before storing  or logging the information. This example mask Credit Card Number (Except last 4 Digit) from a Text which contains information along with Credit Card Number.

The following example demonstrates how we can easily mask the credit card with Matcher and Pattern Classes. This Sample Code uses Matcher and Pattern.
Pattern Used in this sample is not optimized for Credit Card Numbers, this pattern will get any numerical numbers in the String Content.  Based on the Credit Card Type a more efficient and Strict RegEx can be used to mask the Credit Card.
/**Mask the Credit card number but last four digit value **/   Pattern PATTERN = Pattern.compile("[0-9]+"); String message = content; Matcher matcher = PATTERN.matcher(message); String maskingChar = "*"; StringBuilder finalMask = new StringBuilder(maskingChar); while …

Converting Java Map to String

Java Collections framework, String manipulation etc is something that we often encounter in Development process.
For processing collections (like checking null/empty, Intersection, Disjunction) We do have some of the very use full libraries.

Some of the Collection related libraries are Apche Commons Collections and Google  Collections(Guava).

Problem Use Case

This article explains how to convert a Java Map to String(and vice versa) using different libraries and technique.

One way is to use StringBuilder(Or String) and loop though the Map and build the String by applying some sort of separator ( for key:value and entry). Here we have to take care of the null value etc.

Without Any Library
If we want to convert the map to a String with key value separator and also individual entry seperator in the resulting String, we have to write code for that. For a simple Map, we have to iterate though the map, take care of the null values etc. Following is a sample to get String built out from Map C…

Invoking EJB deployed on a remote machine

Invoking EJB deployed on a remote machineIn case we are calling remote ejb( ejb deployed on remote machines),The JNDI lookup might lookup like,Properties env = new Properties();env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");env.put(Context.PROVIDER_URL, "XX.XXX.XX.XX:1099");env.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces"); Context ctx = new InitialContext(env);If we are calling local ejb then we can simply create InitialContext without any parameters.Like,Context ctx = new InitialContext();