Last year's OOPSLA tutorial on Enterprise Integration Patterns was quite well received. The most frequent constructive criticism was that the whole tutorial was PowerPoint as opposed to running code. I took that feedback to heart and set out to develop a toolkit that demonstrates the routing and transformation patterns in our book. After a lot of deja-vu in Windows GDI programming I created a toolkit that contains each pattern as a small executable. The toolkit is a lot of fun and makes for great demos, but it also triggered a bigger question. Are patterns meant to be codified as components?
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