Skip to content

StepChain QuickStar Andvance 高级篇

zengfr曾繁荣 edited this page Aug 11, 2019 · 5 revisions
1、StepChain 的中心思想是什么?如何做到通用的?
答: 
1.1、任何业务逻辑处理抽象成1\input输入 2\ processor处理器 3\output输出.中间过程结果产生和组合成dataMiddle。
1.2、任何业务逻辑处理使用多个processor组合执行。

2、StepChain 如何并行和串行执行多个processor ?
答: 
串行step=pipeline.createStep();step.put(processors);//processors串行执行.
并行step=pipeline.createStep(4);step.put(processors);//processors同时4个并行执行.

3、Stepchain 如何创建processor?
  3.1、实现 IProcessor 接口。
  3.2、使用IProcessorBuilder:
    <I> IProcessor<I, Boolean> createProcessor(Predicate<I> predicate);
    <I> IProcessor<I, Boolean> createProcessor(Consumer<I> consumer);
    <I, O> IProcessor<I, O> createProcessor(Function<I, O> func);

4、StepChain 如何复用和组合processor?
  4.1、使用IChainBuilder、IChain:
  4.2、使用IProcessorBuilder:
    <A, B, C> IProcessor<A, C> createProcessor(IProcessor<A, B> first, IProcessor<B, C> second);
    <A, B, C, D> IProcessor<A, D> createProcessor(IProcessor<A, B> processor1, IProcessor<B, C> processor2, IProcessor<C, D> processor3);

5、StepChain 如何按条件复用和组合processor?
答: 
case1、已有trueProcessor\falseProcessor2个 创建 validator 则按条件执行2则之1.
IConditionSelectorProcessor<String, Boolean, String> p3 = pipeline.createConditionValidatorProcessor(validator, trueProcessor, falseProcessor);

case2、已有processor 创建 validator 创建循环执行体,validator 返回false时终止执行。
IConditionLoopProcessor<String, String> p2 = pipeline.createConditionLoopProcessor(validator, processor);

case3、已有processor创建 switch 逻辑,根据selector返回的key执行某1分支branchProcessor如果返回的key不在分支中 则执行默认key对应的分支branchProcessor。
IConditionSelectorProcessor<String, String, String> p1 = pipeline.createConditionSelectorProcessor(selector);
p1.setBranch(S key, IProcessor<I, O> processor);
p1setDefaultBranch(S key);

case4、已有processor创建 if/else if/else  逻辑,根据validator返回的结果与result对比一致则执行分支branchProcessor,如果没有返回一致的 则执行默认分支branchProcessor。
pipeline.createConditionValidatorSelectorProcessor();
public interface IConditionValidatorSelectorProcessor<I,O> extends IProcessor<I, O> {
   void setBranch(IProcessor<I, Boolean> validator,Boolean result,IProcessor<I, O> processor);
   void setDefaultBranch(IProcessor<I, O> processor);
}