>>>>>>The only thing that will be tied with the Bussines Layer will be >>>>>>commons-beanutils.jar. What about the struts libs ? The ActionForm will be the Bean that is wrapped inside the DynaBean and it has refs to the struts as well as servlets package....
Perfromance ..as mentioned we have not yest benchmarked but we have not had any noticeable impact no the performance of the system when using DynaBeans...We are using them in the appserver layer though for transferring data from a resultset into a DynaBean and from there to a Value Object. Sumit -----Original Message----- From: Ovidiu EFTIMIE [mailto:[EMAIL PROTECTED] Sent: Friday, November 14, 2003 2:54 PM To: Struts Users Mailing List Subject: Re: DTO pattern and WrapDynaBean Yes, I know it holds the reference, but it could be a reference to any other JavaBean. The only thing that will be tied with the Bussines Layer will be commons-beanutils.jar. The ideea is to avoid creating new data transfer objects; so the real debate here is that if the overhead added by getting the data in the bussines layer, using reflection/introspection, is smaller than the overhead added by creating another object and filling it with the data obtained from the ActionForm and retriving this data in the bussines layer. Ovidiu ----- Original Message ----- From: "Sumit S." <[EMAIL PROTECTED]> To: "Struts Users Mailing List" <[EMAIL PROTECTED]> Sent: Friday, November 14, 2003 10:07 AM Subject: RE: DTO pattern and WrapDynaBean I have'nt benchmarked the perf, but for our app we were not comfortable with having the struts libs in the Application layer...The WrapDynaBean holds the instance of the Action form and hence has references to the struts libs. Sumit -----Original Message----- From: Ovidiu EFTIMIE [mailto:[EMAIL PROTECTED] Sent: Friday, November 14, 2003 2:05 PM To: Struts Users Mailing List Subject: DTO pattern and WrapDynaBean Hi, I've used until now the DTO pattern to transfer data from action forms to the bussines layer , but I was wondering if using WrapDynaBean (that I've just discovered) to wrap the action form an to pass it in a DAO class would have a major inpact on performance. For example: ===> in an Action (DocumentAction) DocumentForm dcForm = (DocumentForm)form; DynaBean wrp = new WrapDynaBean(dcForm); DocumentDAO dbo = new DocumentDAO(); dom.insertDocument(getConnection(),wrp); ===>and then in the DAO class public int insertDocument(Connection conn, DynaBean data){ StringBuffer sbf = new StringBuffer(); sbf.append("insert ......").appen(data.get("title")).append(",") .append(data.get("author")).append(")"); ............................................ } So the basic ideea is to use the wrapped ActionForm as a DTO. Anyone has any comments? Thanx Ovidiu ps: I'm reposting this beacause yesterday our mail server had some problems and I'm not sure it was really posted on the list --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]