for more about Tapestry Service go http://tapestry.apache.org/tapestry5/tapestry-ioc/service.html

Tapestry Services

Services consist of two main parts: a service interface and a service implementation. The service interface is how the service will be represented throughout the rest of the application.

Service Interface and Implementation

Create an Interface (Service.java) in services package. declare service methods in interface.

Create a Class (ServiceImpl.java) in services package. this class most implement 'Service' Interface.

Add Service To Your Application

Each Tapestry Application could have special class that called Module class. A module class exists for the following reasons:

• To bind service interfaces to service implementations
• To contribute configuration data into services
• To decorate services by providing interceptors around them
• To provide explicit code for building a service
• To set a default marker for all services defined in the module

Module Class name consist of two parts : <tapestry filter name> + Module. This class most be in services package. for example if your application filter name is myapp your module class name most be MyAppModule.java or MyappModule.java(the filter name is case insensitive).

note that application filter name was defined in web.xml.

put this code in your AppModule class :

    public static void bind(ServiceBinder binder) {
        binder.bind(Service.class, ServiceImpl.class);
    }

Inject Service to Page

put this code in your page class :

    @Inject
    private Service service;

after this you can use service and call its methods in your page

for more about Tapestry Service go http://tapestry.apache.org/tapestry5/tapestry-ioc/service.html

good luck.