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Apache Axis2
Stubs & Skeletons With Axis2
Agenda
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Introducing the Axis2 code generator
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Client Side-Stubs with Axis2
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Server Side-Skeletons with Axis2
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Default options
Different data bindings
Tweaks and options
Default options
Different data bindings
More tweaks
Exercises
Command Line Codegen Tool
• Two Formats
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wsdl2java
java2wsdl
• Available in .bat and .sh formats in
<Axis2_home>/bin directory
• wsdl2java - generate Java helper classes from
WSDL
• java2wsdl – generate a WSDL from a Java
Class or Interface
Main tooling functions
Stub
<wsdl/>
Interface
Or class
java2wsdl
wsdl2java
document
Skeleton
Tooling in real life
WSDL
Enhance
WSDL
Axis2 client
stub
1
POJO
2
Axis2
server
SOAP (at runtime)
WSDL2Java
Java2WSDL
(automatic)
WSDL2Java
WSDL
+
(filled-in)
Skeleton
WSDL
Where is the Code Generator?
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Command line version
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Available in the Axis2 standard distribution
Accompanied with Batch and Shell scripts
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Eclipse plug-in
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IntelliJ IDEA plug-in
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Maven2 plug-in
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Ant task
Details: http://ws.apache.org/axis2/tools/index.html
Note: All the examples use the command line tool
Options for the Code Generator
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Long list of options!
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Complete reference at
http://ws.apache.org/axis2/tools/1_4/CodegenToolReference.html
Also look at
http://ws.apache.org/axis2/1_4/reference.html
Important ones
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-uri – WSDL file (required)
-o – output folder
-d – data binding framework
-s – sync interfaces o
Agenda

Introducing the Axis2 code generator

Client Side-Stubs with Axis2
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−
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Default options
Different data bindings
Tweaks
Server Side-Skeletons with Axis2
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Default options
Different data bindings
More tweaks
Stubs - Case 1 - Default Options
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Try the -uri option only
wsdl2java -uri currencyConvert.wsdl
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Applied default options
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Output directory is the current directory
Data binding is ADB
Language is Java
Both sync and async methods
Client side code generation only
Stubs - Case 1 Cont...
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Generated Artifacts
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src directory
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Stub source file
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Callback source file
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The call back class to be used when invoking the async methods
build.xml
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Contains both the sync and async methods
Ant build file
All data binding classes are generated as inner
classes inside the stub
Stubs – Case 1 - sync Method
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Returns the relevant response directly
//instantiate the stub
CurrencyConverterServiceStub stub
= new CurrencyConverterServiceStub();
CurrencyConverterServiceStub.ConversionRequest
request = new CurrencyConverterServiceStub.ConversionRequest();
//fill up the request object
request.setAmount(100f);
request.setFromCurrency("USD");
request.setToCurrency("SLR");
//send and get the response
CurrencyConverterServiceStub.ConversionResponse
response = stub.convert(request);
Data binding
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How to go from Java objects to XML and back
again
Axis2 was designed to be flexible with respect
to the Data Binding approach
wsdl2java supports
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XMLBeans – an Apache project
ADB – Axis Data Binding (built-in)
JIBX – http://jibx.sourceforge.net
JAXBRI – Java API for XML Binding Reference
Implementation
None – A stub/skeleton with AXIOM-typed interface
Data binding compared
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XMLBeans has 100% schema coverage
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But generates many many classes!
ADB does not support 100% schema coverage
and hence has limitations. But the number of
classes are significantly reduced improving
performance.
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JiBX is a third party binding framework
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JAXB is the Java Standard
Stubs - Case2 - Switch Data Binding
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Use the -d option
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Other options are defaults
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Similar to case 1
wsdl2java -uri currencyConvert.wsdl -d xmlbeans
Stubs – Case2 Cont...
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Generated Artifacts
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src directory
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Stub source file
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Callback source file
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The call back class to be used when invoking the async methods
XMLBeans specific data binding classes
resources directory
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Contains both the sync and async methods
XMLBeans specific xsb files
build.xml
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Ant build file
Stubs - Case 2 – sync Method
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Method signatures are slightly different
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Uses XMLBeans classes now!
CurrencyConverterServiceStub stub =
new CurrencyConverterServiceStub();
ConversionRequestDocument requestDoc =
ConversionRequestDocument.Factory.newInstance();
ConversionRequest request = requestDoc.addNewConversionRequest();
//fill up the request object
request.setAmount(100f);
request.setFromCurreCncy("USD");
request.setToCurrency("SLR");
//call the method
ConversionResponseDocument response =
stub.convert(requestDoc);
Stubs – Case 3 - Tweaks
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Switch on/off sync and async
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-a generates only async methods
-s generates only sync methods
Generate a test case
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-t generates a Junit test case
Needs filling in before usage
 Read the todo's before running!
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Unpack ADB classes
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-u expands the generated data binding classes
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See next page
Unpacking
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Unpacked stubs have separate classes for the
top-level types
Works well for a real SOA application where the
data types will be used across several different
services
Always used for server side
Otherwise all the classes are inner types of the
stub
Gives a single class to use a service and works
well for building a client to a single service
Stubs – Case 3 Cont...
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Package name control
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Derives package names from the target namespace
by default
-p overrides the main package
-ns2p helps to provide different packages to
different namespac
Unwrapping
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Remember the discussion of “wrapping” in
WSDL?
-uw performs an unwrapping if your WSDL uses
a wrapped style
Instead of
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submit(PORequest po)
submit(String,String,int, double,…)
Agenda

Introducing the Axis2 code generator

Client Side-Stubs with Axis2
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Default options
Different data bindings
Tweaks and options
Server Side-Skeletons with Axis2
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Default options
Different data bindings
More tweaks
Skeletons – Case 1 - Defaults
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Try the -uri option with -ss and -sd
-ss stands for server side
 -sd stands for service descriptor
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Default options used are similar to stub case 1
wsdl2java -uri currencyConvert.wsdl -ss -sd
Skeletons – Case 1 Cont...
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Generated Artifacts
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src directory
Skeleton source file
 Message receiver source file
 ADB specific data binding classes
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resources directory
WSDL file
 services.xml file
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build.xml
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Ant build fil
Skeletons – Case 1 Cont...
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Just fill in the skeleton
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Example code:
public class MyServiceSkeleton {
public MyReturnObject myOperation(MyReqObj param0) {
// fill in code here
return null;
}
}
Skeletons – Case 1 Cont...
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Making the service archive
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Use the build script!
Deploy the service archive
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Copy the archive to the services folder of the
repository.
Upload it using the web admin tool.
Skeletons - Case 2 - Switch Data
Binding
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Use the -d xmlbeans switch
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Default options used are similar to case1
wsdl2java -uri currencyConvert.wsdl -ss –sd -d xmlbeans
Skeletons – Case 2 Cont...
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Generated Artifacts
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src directory
Skeleton source file
 Message receiver source file
 XMLBeans specific data binding classes
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resources directory
WSDL file
 services.xml file
 XMLBeans specific .xsb files
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build.xml
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Ant build file
Skeletons – Case 3 - Tweaks
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-ssi generates an interface
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useful when multiple implementations are present
-g generates both client and server code
Summary
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Axis2 offers a rich set of code generation
options
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Stubs and skeletons
Multiple data bindings
Auto creation of WSDL, services.xml and Ant build
file
Also plug-in versions of the command line tools
are available for several IDEs
Exercises
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In the beginner section of this training, we have
used wsdl2java command both to generate
server side and client side code.
How about java2wsdl? Find the options that can
be used with this command.
Given the Java interface
“TemperatureConverter.java” (see the
resources section),
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Use java2wsdl to generate the WSDL file and then
wsdl2java to generate client and server side code
Complete both client and server, deploy the service
and test