one step, whole life

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tech road 

1. tech & wk

1. design

1. DDD Think

2. reactive programming

2. tech

1.Java concurrency

2.Java stream, multiple calculation,FP

3.RxJava, DDD event, notification

4.JVM 结构，optimization.

3. extension

1. Spring reactive programming
2. gradle groovy.
3. Scala

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