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From Davanum Srinivas <dava...@gmail.com>
Subject Re: [Axis2] Adding support for WS Policy in Axis2
Date Mon, 21 Nov 2005 16:49:01 GMT
Sanka,

+1 from me. i think we need to get WS-SecurityPolicy working with
Axis2's security module.

thanks,
dims

On 11/21/05, Sanka Samaranayake <ssanka@gmail.com> wrote:
> Dear Axis2 Developers,
>
> I would like to know whether there are any efforts to add support for WS
> Policy in Axis2 framework. The Web Services Policy Framework (WS-Policy)
> provides a general purpose model and corresponding syntax to describe
> and communicate the policies of a Web service.  Ws-commons/policy
> provides a framework which can be used to manipulate WS Policies.
> Following is a brief introduction on ws-commons/policy and I hope that
> it'll be useful in any effort to add WS Policy support in Axis2 framework.
>
>
> How to use ws-commons/Policy.
>
>
> Ws-commons/Policy framework provides a convenient way to process
> policies. In this framework a requirement is viewed as an assertion. An
> assertion can be of two types.
>
> (a) Primitive Assertion - it is a domain specific requirement.
> One needs domain-specific knowledge to process a primitive assertion.
>
> (b) Composite Assertion: it contains set of requirements and implicit
> knowledge how those requirements should met.
> For instance AndCompositeAssertion requires that all of its terms (set
> of assertions it contains) are met.
>
> XorCompositeAssertion requires that exactly one of it terms should met.
>
>
> Policy operations:
>
> Three policy operations are defined
> (a) normalize();
> Creates a new Assertion object which is in its normalized format.
>
> (b) intersect();
> Provides a set of alternatives which both parties understand. If any
> policy alternative that contains an assertion which the other party
> doesn't understand is ignored.
>
> (c) merge();
> Provides all alternatives which can be derived by two policies. If one
> of these alternatives can be met, then at least one of the policy
> alternatives of both policies are met.
>
>
> How to read a policy object:
>
> InputStream is = new FileInputStream("/home/ ..... /policy.xml");
>
> PolicyFactory factory = PolicyFactory.getInstance();
> PolicyReader reader = factory.getPolicyReader();
> Policy policy = reader.readPolicy(is);
>
>
> How write a policy object:
>
> OutputStream os = new FileOutputStream("/home/..../policy.xml");
>
> PolicyFactory factory = PolicyFactory.getInstance();
> PolicyWriter writer = factory.getPolicyWriter();
> writer.writePolicy(os);
>
>
> How to normalize a policy ;
>
> Policy policy = reader.readPolicy(...);
> Policy normalized = (Policy) policy.normalize();
>
>
> How to merge two policies;
>
> Policy policy1 = reader.readPolicy("..../policy1");
> Policy policy2 = reader.readPolicy("..../policy2");
>
> Policy merged = (Policy) policy1.merge(policy2);
>
> Best,
> Sanka
>
>
>
>
>
>
>
>
>


--
Davanum Srinivas : http://wso2.com/blogs/

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