Apache Axis (Apache eXtensible Interaction System) is an

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. T ...

based Web service framework. It consists of a

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and a C++ implementation of the

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server, and various utilities and

API An application programming interface (API) is a way for two or more computer programs to communicate with each other. It is a type of software Interface (computing), interface, offering a service to other pieces of software. A document or standa ...

s for generating and deploying

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service applications. Using Apache Axis, developers can create interoperable,

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applications. Axis development takes place under the auspices of the

Apache Software Foundation The Apache Software Foundation (ASF) is an American nonprofit corporation (classified as a 501(c)(3) organization in the United States) to support a number of open source software projects. The ASF was formed from a group of developers of the A ...

Axis for Java

When using the Java version of Axis there are two ways to expose Java code as Web service. The easiest one is to use Axis native JWS (Java Web Service) files. Another way is to use custom deployment. Custom deployment enables you to customize resources that should be exposed as Web services. See also Apache Axis2.

JWS Web service creation

JWS files contain Java class source code that should be exposed as Web service. The main difference between an ordinary java file and jws file is the file extension. Another difference is that jws files are deployed as

source code In computing, source code, or simply code, is any collection of code, with or without comments, written using a human-readable programming language, usually as plain text. The source code of a program is specially designed to facilitate the wo ...

and not compiled

class file A Java class file is a file (with the filename extension) containing Java bytecode that can be executed on the Java Virtual Machine (JVM). A Java class file is usually produced by a Java compiler from Java programming language source files ( fi ...

s. The following example will expose methods ''add'' and ''subtract'' of class Calculator. public class Calculator

JWS Web service deployment

Once the Axis servlet is deployed, you need only to copy the jws file to the Axis directory on the server. This will work if you are using an Apache Tomcat container. In the case that you are using another web container, custom WAR archive creation will be required .

JWS Web service access

JWS Web service is accessible using the URL http://localhost:8080/axis/Calculator.jws . If you are running a custom configuration of Apache Tomcat or a different container, the URL might be different.

Custom deployed Web service

Custom Web service deployment requires a specific deployment descriptor called WSDD (Web Service Deployment Descriptor) syntax. It can be used to specify resources that should be exposed as Web services. Current version (1.3) supports *

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services * EJB - stateless (

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)

Automated generation of WSDL

When a Web service is exposed using Axis it will generate a

WSDL The Web Services Description Language (WSDL ) is an XML-based interface description language that is used for describing the functionality offered by a web service. The acronym is also used for any specific WSDL description of a web service (also ...

file automatically when accessing the Web service URL with ''?WSDL'' appended to it.

Related technologies

* Apache Axis2 - re-design/write of Axis * Java Web Services Development Pack - web services framework * Apache CXF - other Apache web services framework (old

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& Celtix) *

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- RPC/web services framework *

Web Services Invocation Framework The Web Services Invocation Framework (WSIF) supports a simple and flexible Java API for invoking any Web Services Description Language (WSDL)-described service. Using WSIF, WSDL can become the centerpiece of an integration framework for accessing ...

- Java API for invoking Web services *

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- commercial web services enabling product

References

External links

* /axis.apache.org/ Apache Axis Homepageat the Apache Software Foundation {{Apache Software Foundation Axis Web services Web service specifications