Java Persistence API v1.0 (JPA)

http://www.cornerstone.se/expertzone/dev07/sessions_java.aspx

Declarative mappingFramework APIQuery LanguageTransaction Support
Entiteter: skall vara rena
ORM: Håller det hela i synk
Tjänster

Transparent Persitance

JPA 1.0 Declarative Object Relational Mapping
1. Classes are mapped to tables
2. Fields are mapped to columns
3. All types of relationships are supported
4. Support for embedded objects
5. Use either annotation or deployement descriptors

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Laxy loading potentiellt problem med många sm@a
Eager loading kan ge stora SQL statements
Guideline Use laxy on relations and "fetch join" on queries
(Select * from Employee e LEFT JOIN FETCH e. phoneNumbers WHERE )

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Contructor expressions in queries

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Buld update delete

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Valideringar - Lifecycle Callback

Excel macro

Problem Fylla alla tomma celler i vald range i Excel med dom ovanfor.

Losning
Macro se
http://www.mvps.org/dmcritchie/excel/fillempt.htm

Produktivitet

Nice links

http://wiki.davidseah.com/public:article_cat1#productivity

Ask Men
Turning Goals into Actions

Getting Things Done GTD

Getting things done
A survey of the Get Things Done Landscape Apps
Getting Things Done: The Art of Stress-Free Productivity Summary
Blog om GTD

Software
MindManager Pro http://www.mindjet.com/eu/

Updated Nhibernet article

NHibernate Best Practices with ASP.NET, 1.2nd Ed. - The Code Project - ASP.NET

NHibernate Best Practices with ASP.NET, 1.2nd Ed

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OO Design Principle metrics

http://www.parlezuml.com/metrics/OO%20Design%20Principles%20&%20Metrics.pdf

http://www.objectmentor.com/resources/articles/CoffeeMaker.pdf

http://www.objectmentor.com/resources/publishedArticles.html

http://www.objectmentor.com/resources/articles/Principles_and_Patterns.pdf

http://www.objectmentor.com/resources/downloads.html

Best Practise in error handling webparts in Sharepoint 2007

Uploaded as an article to CodeProject
http://www.codeproject.com/useritems/Errorhandling_in_Webparts.asp

When installing a webpart in Sharepoint 2007 you need to have some kind of model how to handle errors. This is the approach I have used.

The entry points in the code are

1. CreateChildControls
Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering.

2. Render
Renders the control to the specified HTML writer.

The problem is that the user should get somekind of feedback in a readable format telling him OOhps the secound problem is how to communicate this to the System Administrator

My Approach

a) Create a private variable to store the Exception
private Exception childException = null;

b) In CreateChildControls have a try/catch and catch the error in the childException variable
try{
base.CreateChildControls();
.....}
catch (Exception exp)
{
HttpContext ctx = HttpContext.Current;
ctx.Trace.Warn(ex.ToString());
childException = ex;
}
c) In Render check if the have a try/catch and catch the error in the childException variable
and then display the result in the page by using labels..


protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
if (childException != null)
displayErrorMsg(writer, childException);
try
{...
...
...

}
catch (Exception ex)
{
displayErrorMsg(writer, ex);
}

where

private void displayErrorMsg(HtmlTextWriter writer, Exception ex)
{
this.Controls.Clear();
this.Controls.Add(new LiteralControl(ex.Message));
if (ex.InnerException != null)
{
this.Controls.Add(new LiteralControl(ex.InnerException.Message));
}
this.Controls.Add(new LiteralControl());
base.Render(writer);
HttpContext ctx = HttpContext.Current;
ctx.Trace.Warn(ex.ToString());
}

Sharepoint Event handlers explained

See http://blogs.msdn.com/brianwilson/archive/2007/03/05/part-1-event-handlers-everything-you-need-to-know-about-microsoft-office-sharepoint-portal-server-moss-event-handlers.aspx