Request templates are obtained from a Session and should be always used with the session that creates the template. When a session is terminated, any request templates associated with that session become invalid. Results of sending or canceling of invalid requests templates is undefined.

In order to send a request represented by a template, the SendRequest(RequestTemplate, CorrelationID) method should be called with the 'RequestTemplate' object passed as the first argument.

All handles should be closed by calling close method for releasing resources when a request template is no longer needed.

Check createSnapshotRequestTemplate(String, CorrelationID, Identity) for details about creation and management of snapshot request templates.

RequestTemplate requestTemplate
     = session.createSnapshotRequestTemplate(
          "//blp/mktdata/ticker/IBM US Equity,
          statusCorrelationId,
          identity);
session.sendRequestTemplate(requestTemplate);
requestTemplate.close();

Reference