Eduzine©

Introduction

First of all, what does term "inline" mean?

Generally the inline term is used to instruct the compiler to insert the code of a function into the code of its caller at the point where the actual call is made. Such functions are called "inline functions". The benefit of inlining is that it reduces function-call overhead.

This article describes how to consume web services in Java 1.5.0 using the new JAX-WS 2.0 API (JSR 228 at http://jcp.org/en/jsr/detail?id=224).

Developers around the world, including me, have always complained about the hard ways to work in Java to consume even a web service as simple as adding two numbers.

However, with JAX-WS 2.0 API now available in core Java in JDK 1.5.0, life is simple like never before.

The article describes how this API can be used for maximum benefits using some off-the-shelf tools similar to wsdl.exe available from Microsoft in the .Net Framework to generate the proxy classes.

How do I access two separate methods of same class publishing multiple operations in a webservice with the state being maintained?

The answer to this question, put in the newsgroup, is making use of transaction techniques. What you are trying to say is that I would like to have operations being done successfully to indicate that my job is done.

Strictly speaking, the problem does not make a concrete sense in the realm of web services since multiple operations at an end-point may or may not be implemented by a single class. So, let me rephrase the problem so that it becomes technically correct w.r.t. Web Services.

I get a 405 error while working with ASP.Net based web service. The request synopsis is:

POST / HTTP/1.0
Host: my.machine.host.name
Content-Type: text/xml
Content-Length: NNNN
...

The problem is not anywhere else but with the request itself. To be able to appreciate the solution, one must understand the HTTP specifications.

1.0 version of HTTP does not specify any 'Host' header. It was introducted in 1.1. One needs to change the request to look something like:

POST http://my.machine.host.name/ HTTP/1.0
Content-Type: text/xml
Content-Length: NNNN
...

What is HTTP SOAP and how does it differ from HTTP POST as far as Web Services in ASP.Net are concerned?

To get an answer to the question, one must first have an understanding of the HTTP Protocol - how does it work.

HTTP Protocol allows, among other methods, two most widely methods - GET and POST. You may consider them as the commands given to the server to perform specific tasks.

How does the interoperability of Web Services between Java, PHP and .Net fare?

In this entry and may be a couple more to follow, I plan to bring out how the three leading web-platforms fare when it comes to Web Services. Few questions, not exhaustive by any means, that would be of interest may be:

• What level of support is available in individual platform?
• How good is individual platform when it comes to all standards and specifications around WebServices?
• How good is individual platform when it comes to inter-operability with others?
• What resources are available in terms of bundled libraries, additional libraries, 3rd party tools and libraries and documentation / tutorials thereof?

How do I use arrays in a Web Service?

Probably one of the more frequently asked questions regarding web services. I thought I will answer this prior to starting my discussion on comparing platforms.

Attempting to answer this question from the perspective of all three major enterprise platforms...

How to transfer files using Web Services?

There are actually multiple ways of doing so.

The first, simplest approach, is to send the contents of the file as a raw-string parameter. In case, the file content is binary, do not forget to base64 encode it.

The advantage of this approach is that you don't need to download any extra features / extensions / add-ons for any Web Service engine that you are using, be it on .Net, Java, PHP or whatever.

How to disable non-SOAP and non-Documentation Requests to ASP.Net based Web Services?

ASP.Net WebServices (ASMX handlers) are highly configurable in terms of the protocols that they can handle. By protocol, I mean the WebServices protocols like Get, Post, Document, SOAP-1.1, SOAP-1.2 etc.

The configuration section /configuration/system.web/webServices is handled by System.Web.Services.Configuration.WebServicesSection. Now, this section has a sub-section of procotols that is mapped to the Protocols property of the class mentioned.

How to use this WSDL file in my own .NET application?

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