Reading a property of Axis2 services.xml from service Implementation class

There have been questions raised in Axis2 user list about reading some properties defined in services.xml from service implementation class.
An easy way of doing that is as follows.

1. Suppose your services.xml is as follows and it has a parameter named, TestProperty.

<service name="ParameterService">
<messageReceivers>
<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-only"
class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver"/>
<messageReceiver mep="http://www.w3.org/2004/08/wsdl/in-out"
class="org.apache.axis2.rpc.receivers.RPCMessageReceiver"/>
</messageReceivers>
<parameter name="ServiceClass">org.test.MyParameterService</parameter>
<parameter name="TestProperty">This is a test property</parameter>

</service>

2. We need to read the value of "TestProperty" parameter from service implementation class.
It can be done using MessageContext as follows.

import org.apache.axis2.context.MessageContext;

public class MyParameterService {
public void readProperty(){
MessageContext mc = MessageContext.getCurrentMessageContext();
String prop = mc.getCurrentMessageContext().getAxisService().getParameter("TestProperty").getParameterElement().getText();
System.out.println(prop);
}

}

Now you can create a service archive with this class and copy it to AXIS2_HOME/repository/services directory. Then start axis2server.bat and go to http://localhost:8080
You will notice that the service will be deployed there. Then invoke the service by sending HTTP GET request as follows
http://localhost:8070/axis2/services/ParameterService/readProperty

Look at the Axis2server console. You will see "This is a test property" message is printed there.

Comments

Amila Suriarachchi said…
hi Charitha,

Normally we read parameters from services.xml and axis2.xml. Properties are read from the options object. i.e.

MessageContext.getCurrentMessageContext().getOptions().getProperty("TestProperty");

Typically users set properties at the Client level (i.e. at ServiceClient )

thanks,
Amila.
November 11, 2008 at 1:59 AM
Ranjan Patro said…
Hi,
Thanks for writing "Reading a property of Axis2 services.xml from service Implementation class".
Can you tell me how to get the properties in lower levels of the service.
For example I want properties related to database in dao layer, but I dont want to declare dao layer as a service class.
I get null pointer exception on trying it this way.
August 20, 2009 at 5:12 AM
Ranjan Patro said…
I put the properties file besides the service accessible files (unlike log4j.xml which is still in util package) and it worked fine.
This was my mistake.
Thank you.
August 24, 2009 at 5:41 AM
shazsterblog.blogspot.com said…
Retrieving the property value can be done

mc.getCurrentMessageContext().getAxisService().getParameter("TestProperty").getValue().toString();
March 2, 2010 at 8:57 PM
Post a Comment

Popular posts from this blog

WSO2 Stratos - Introducing WSO2 middleware Platform as a Service (PaaS)

Image
Yesterday we released our newest integrated cloud middleware platform, WSO2 Stratos . It is now online and ready for use! For the past few years, WSO2 has been doing many releases based on revolutionary Carbon platform , which helped to consistently improve the platform with introducing latest state-of-art technologies. The initial releases of Carbon product platform intended to improve the features of the individual products. For example, a lot of core features were introduced to WSO2 ESB, WSAS, Governance Registry etc.. Then we focused on ease of integration and more component based model. We introduced Equinox based provisioning model to build your SOA platform by picking and choosing the components as and when you need. Then, the core product platform has been enhanced to support multi-tenancy. With the multi-tenant supported architecture at hand, our brilliant development team was able to introduce the first ever comprehensive middleware PaaS. Why is this so important? Now, WSO2 C...
Read more

Common mistakes to avoid in WSO2 ESB - 1 - "org.apache.axis2.AxisFault: The system cannot infer the transport information from the URL"

In the next few weeks, you could expect a series of blog posts from me which explain the remedies to avoid some common mistakes which we do when working with WSO2 ESB . This is the first of many. During the initial rounds of testing your integration solution or even in production systems, you may have come across the following error. org.apache.axis2.AxisFault: The system cannot infer the transport information from the URL .... Some of you may have struggled hours figuring out a solution to address this issue. Let me explain this error in detail and possible causes of this. So, next time when you see this error in your WSO2 ESB setup, you will not have to spend time unnecessarily googling everywhere. There can be many different causes of this error. I have observed  four main reasons. Cause 1 This is the simplest cause. Suppose, you have a proxy service similar to the following. <proxy xmlns="http://ws.apache.org/ns/synapse" name="MistakesTest...
Read more

Working with HTTP multipart requests in soapUI

Image
You can use HTTP request test step in soapUI to submit messages with various Content-Types.  In this post, we will have a quick look into the multipart/form-data requests in soapUI. multipart/form-data requests usually come into action when you do HTML form submissions with file attachments. For example, have a look at the following HTML form post. <form action="http://localhost:8090/CKFileUploadApp/UploadServlet" method="post" enctype="multipart/form-data"> <input type="file" name="file"> <input type="text" name="paramName"> <input type="submit" name="Submit" value="Upload File"> </form> In the forms like above, we have file upload option as a form input where we can upload a file along with the form submission. In that case, the request's HTTP content type will be multipart/form-data. How can we simulate such a request using soapUI...
Read more