title: Spring WS & Validator interceptor
body: <p>I have a endpoint mapping a webservice which is used to insert in the dabatabase some keywords:</p>
  
  <pre><code>@Transactional(readOnly = false,isolation= Isolation.SERIALIZABLE)
  public Source saveKW(...).
  </code></pre>
  
  <p>The input is a request.</p>
  
  <p>I would like to add  an interceptor on the method in order to validate the parameters.
  this one will read some values from the DB.</p>
  
  <p>i would like that this interceptor is EMBED in the transaction declared for the endpoint (or this opposite). In other words, i want them to be in the same transaction.</p>
  
  <p>Ideally im looking for something like this with annotation:</p>
  
  <pre><code>@Transactional(readOnly = false,isolation= Isolation.SERIALIZABLE)
  @validator("KeyWordValidaor.class")
  public Source saveKW(...)
  </code></pre>
  
  <p>where <code>KeyWordValidaor</code> will be class validating the parameters.</p>
  
  <p>Have you any idea or short examples to implements this like this way or in a other real way?</p>