Interceptor

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The document discusses interceptors, which are reusable components that can monitor and modify method invocations in middleware frameworks. Interceptors provide a way to separate cross-cutting concerns like logging, authentication, and transaction management from application code. They work by registering callback methods with a dispatcher component that executes interceptors before and after target methods. While interceptors enable aspects like monitoring and load balancing, they also add complexity and potential performance issues if not implemented carefully.

Technology Business

Problem

• Intergration.
• No affect.
• Monitor and Control.

Interceptor

• Concrete Framework
.

• Hook method
• Concrete Interceptor

Interceptor
register
remove
Interceptor Dispatcher
callback

Concrete
Framework

Interceptor
Context
Object
Concrete
Interceptor
accessor Framework
mutator

Dispatcher

• Concrete Interceptor , .

• (Dispatch)

Context Object

• Concrete Framework .

• Concrete Framework .

Interceptor points

•
.(logging, changing parameters)

Known Uses -
Component-based application servers

Beneﬁts

• .

• Separation of concerns.
• .

• (Layer symmetry)

• .

Liabilities

• .

• Malicious or erroneous interceptors.
• Potential interception cascades.

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Interceptor

1. Interceptor

2. Interceptor • . • .

3. MiddleORB

4. . • .

5. Context • (transparently)

6. Problem • Intergration. • No affect. • Monitor and Control.

7. Solution

8. Structure - Concrete framework

9. Interceptor • Concrete Framework . • Hook method • Concrete Interceptor

10. Interceptor register remove Interceptor Dispatcher callback Concrete Framework

11. Interceptor Context Object Concrete Interceptor accessor Framework mutator

12. Dispatcher • Concrete Interceptor , . • (Dispatch)

13. Context Object • Concrete Framework . • Concrete Framework .

14. Solution

15.

16. Implementation

17. Interceptor points • .(logging, changing parameters)

18.

19. Example - Load balancing

20. Variants - Interceptor Proxy

21. Known Uses - Component-based application servers

22. Beneﬁts • . • Separation of concerns. • . • (Layer symmetry) • .

23. Liabilities • . • Malicious or erroneous interceptors. • Potential interception cascades.

Editor's Notes

\n
\n
&#xBE0C;&#xB85C;&#xCEE4;&#xD328;&#xD134;&#xC73C;&#xB85C; object request broker(ORB)&#xB97C; &#xAD6C;&#xD604;. \n&#xBD84;&#xC0B0; &#xC5B4;&#xD50C;&#xB9AC;&#xCF00;&#xC774;&#xC158;&#xC744; &#xAD6C;&#xD604;&#xD558;&#xB294;&#xB370; &#xD3B8;&#xC758;&#xB97C; &#xC81C;&#xACF5;&#xD558;&#xB294; &#xC11C;&#xBE44;&#xC2A4; &#xAC1C;&#xBC1C;.\n&#xD1B5;&#xC2E0; &#xC11C;&#xBE44;&#xC2A4;(&#xC5F0;&#xACB0; &#xAD00;&#xB9AC;, &#xD504;&#xB85C;&#xD1A0;&#xCF5C;)&#xB97C; &#xC81C;&#xACF5;.\n&#xC774;&#xC678; &#xD2B8;&#xB79C;&#xC81D;&#xC158;, &#xB85C;&#xAE45;, &#xBE44;&#xD45C;&#xC900; &#xD1B5;&#xC2E0;(&#xACF5;&#xC720; &#xBA54;&#xBAA8;&#xB9AC;), &#xBAA8;&#xB2C8;&#xD130;&#xB9C1;, &#xB514;&#xBC84;&#xAE45;.\n
\n
\n
&#xD504;&#xB808;&#xC784;&#xC6CC;&#xD06C;&#xB294; &#xCF54;&#xC5B4; &#xC544;&#xD0A4;&#xD14D;&#xCCD0;&#xC758; &#xC218;&#xC815; &#xC5C6;&#xC774; &#xC11C;&#xBE44;&#xC2A4;&#xB97C; &#xCD94;&#xAC00;&#xD560; &#xC218; &#xC788;&#xC5B4;&#xC57C; &#xD55C;&#xB2E4;.\n&#xD504;&#xB808;&#xC784;&#xC6CC;&#xD06C;&#xC5D0; &#xC5B4;&#xD50C;&#xB9AC;&#xCF00;&#xC774;&#xC158; &#xB808;&#xBCA8; &#xC11C;&#xBE44;&#xC2A4;&#xC758; &#xD1B5;&#xD569;&#xD560; &#xACBD;&#xC6B0; &#xAE30;&#xC874; &#xD504;&#xB808;&#xC784;&#xC6CC;&#xD06C; &#xCEF4;&#xD3EC;&#xB10C;&#xD2B8;&#xC5D0; &#xC601;&#xD5A5;&#xC744; &#xB07C;&#xCCD0;&#xC11C;&#xB294; &#xC548;&#xB41C;&#xB2E4;.\n&#xC5B4;&#xD50C;&#xB9AC;&#xCF00;&#xC774;&#xC158;&#xC774; &#xC790;&#xC2E0;&#xC758; &#xB3D9;&#xC791;&#xC744; &#xC81C;&#xC5B4;&#xD558;&#xACE0; &#xBAA8;&#xB2C8;&#xD130;&#xB9C1;&#xD560; &#xC218; &#xC788;&#xC5B4;&#xC57C; &#xD55C;&#xB2E4;.\n
\n
&#xC774;&#xBCA4;&#xD2B8; &#xCC98;&#xB9AC;.\n
concreate interceptor &#xB294; interceptor &#xC778;&#xD130;&#xD398;&#xC774;&#xC2A4;&#xB97C; &#xAD6C;&#xD604;&#xD55C;&#xB2E4;(specialize)\n&#xD504;&#xB808;&#xC784;&#xC6CC;&#xD06C;&#xC5D0;&#xC11C; &#xBC1C;&#xC0DD;&#xD558;&#xB294; &#xC774;&#xBCA4;&#xD2B8;&#xB97C; &#xCC98;&#xB9AC;&#xD558;&#xAE30; &#xC704;&#xD55C; hook method&#xB97C; &#xAD6C;&#xD604;&#xD55C;&#xB2E4;.\n
\n
context object : framework &#xC811;&#xADFC;&#xACFC; &#xC81C;&#xC5B4;&#xC5D0; &#xC0AC;&#xC6A9;. &#xC774;&#xBCA4;&#xD2B8;&#xAD00;&#xB828; &#xC815;&#xBCF4; &#xD3EC;&#xD568;.\naccessor methods : framework&#xB85C; &#xBD80;&#xD130; &#xC815;&#xBCF4; &#xD68D;&#xB4DD;.\nmutator methods : framework&#xC758; &#xD589;&#xC704; &#xC81C;&#xC5B4;.\n
\n
\n
interceptor &#xC0C1;&#xC18D; &#xBC1B;&#xC740; concrete interceptor &#xAD6C;&#xD604;.\ninterceptor&#xB97C; dispatcher&#xC5D0; &#xB4F1;&#xB85D;. iterator pattern.\nconcrete framework&#xB294; &#xCEE8;&#xD14D;&#xC2A4;&#xD2B8; &#xC0DD;&#xC131;/dispatcher&#xC5D0;&#xAC8C; &#xC54C;&#xB9BC;.\n
\n
&#xC0C1;&#xD0DC; &#xBA38;&#xC2E0;&#xC740; &#xD544;&#xC694;&#xD55C; interceptor&#xC758; &#xC2DD;&#xBCC4;&#xD558;&#xAC8C; &#xD558;&#xACE0;, concrete framework &#xC758; &#xD589;&#xC704;&#xB97C; &#xC815;&#xC704;&#xD558;&#xB294;&#xB370; &#xB3C4;&#xC6C0;&#xC774; &#xB41C;&#xB2E4;.\n
\n
\n
\n
Proxy&#xC5D0;&#xC11C; &#xBD80;&#xAC00;&#xC801;&#xC778; &#xC791;&#xC5C5;&#xC744; &#xC218;&#xD589;&#xD55C;&#xB2E4;.\n
&#xD2B9;&#xBCC4;&#xD55C; concrete &#xD504;&#xB808;&#xC784;&#xC6CC;&#xD06C;(&#xCEE8;&#xD14C;&#xC774;&#xB108;)&#xB97C; &#xD1B5;&#xD574; &#xAE30;&#xBC18; &#xC11C;&#xBE44;&#xC2A4;(&#xD2B8;&#xB79C;&#xC7AD;&#xC158;, &#xC2DC;&#xD050;&#xB9AC;&#xD2F0;, persistence)&#xB97C; &#xAD6C;&#xD604;&#xD558;&#xC9C0; &#xC54A;&#xB294;&#xB2E4;.\n
&#xD655;&#xC7A5;&#xC131;&#xACFC; &#xC720;&#xC5F0;&#xC131;-concrete framework&#xB97C; &#xC218;&#xC815;&#xC5C6;&#xC774; &#xCD94;&#xAC00;,&#xC218;&#xC815;,&#xC81C;&#xAC70;&#xD560; &#xC218; &#xC788;&#xB2E4;.\nSeparation of concerns - interceptor&#xB97C; &#xAE30;&#xC874; &#xC5B4;&#xD50C;&#xC5D0; &#xC601;&#xD5A5;&#xC744; &#xC8FC;&#xC9C0;&#xC54A;&#xACE0; &#xD22C;&#xBA85;&#xD558;&#xAC8C; &#xCD94;&#xAC00;&#xD560; &#xC218; &#xC788;&#xB2E4;. &#xAC1C;&#xBC1C;&#xC790;&#xB294; &#xB85C;&#xC9C1;&#xC5D0;&#xB9CC; &#xC804;&#xB150;&#xD560; &#xC218; &#xC788;&#xB2E4;.\n&#xBAA8;&#xB2C8;&#xD130;&#xB9C1;/&#xC81C;&#xC5B4; - &#xAD00;&#xB9AC;&#xC790;&#xD234;, &#xB514;&#xBC84;&#xAC70;, &#xB85C;&#xB4DC; &#xBC38;&#xB7F0;&#xC2F1;, fault tolerance.\n&#xB300;&#xCE58; &#xB808;&#xC774;&#xC5B4;-&#xD074;&#xB77C;&#xC774;&#xC5B8;&#xD2B8;/&#xC11C;&#xBC84; &#xAC01;&#xAC01;&#xC758; interceptor &#xAD6C;&#xD604;.\nresuablility-interceptor&#xB97C; &#xC7AC; &#xC0AC;&#xC6A9;&#xD560; &#xC218; &#xC788;&#xB2E4;.\n\n\n
erroneous interceptors-timeout\ninterception cascades-concrete framework&#xC758; &#xC0C8;&#xB85C;&#xC6B4; &#xC774;&#xBCA4;&#xD2B8;&#xB97C; &#xBC1C;&#xC0DD;&#xC2DC;&#xD0A4;&#xB294; &#xD589;&#xC704; &#xBCC0;&#xACBD;&#xD558;&#xB294;&#xAC83;&#xC740; &#xC2DC;&#xC2A4;&#xD15C; &#xD37C;&#xD3EC;&#xBA3C;&#xC2A4; &#xB0AE;&#xCD94;&#xACE0; &#xB370;&#xB4DC;&#xB77D;&#xC744; &#xAC00;&#xB2A5;&#xC131;&#xC744; &#xB9CC;&#xB4E0;&#xB2E4;.\n

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Editor's Notes