Java Project Structure
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root
┣━━ custom-processors-bundle
┃ ┣━━ example1-bundle
┃ ┃ ┣━━ example1-processors
┃ ┃ ┃ ┗━━ src
┃ ┃ ┃ ┣━━ main
┃ ┃ ┃ ┃ ┣━━ processor1.java
┃ ┃ ┃ ┃ ┗━━ processor2.java
┃ ┃ ┃ ┗━━ resource
┃ ┃ ┃ ┗━━ META-INF
┃ ┃ ┃ ┗━━ services
┃ ┃ ┃ ┗━━ org.apache.nifi.processor.Processor
┃ ┃ ┗━━ example1-processors-nar
┃ ┃ ┗━━ target
┃ ┃ ┗━━ .nar
┃ ┗━━ example2-bundle
┃ ┗━━ ...
┗━━ custom-services-bundle
┣━━ example1-services-bundle
┃ ┣━━ example1-services
┃ ┃ ┗━━ .java
┃ ┗━━ example1-services-nar
┃ ┗━━ .nar
┗━━ example2-services-bundle
┗━━ ...
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custom-processors-bundle: 새롭게 만들 프로세서들
custom-services-bundle: 새롭게 만들 서비스들
각 NAR 는 하나의 NAR 종속성만 가질 수 있다.
일반적으로 Controller Service API 와 함께 패키징하거나 체인을 설정함.
Dependency Chain for Services (NAR dependencies)
- example1-services-nar -> example1-service-api-nar -> nifi-standard-services-api-nar
Dependency Chain for Processors (NAR dependencies)
- example1-processors-nar -> example1-service-api-nar
참고: https://github.com/bbende/nifi-dependency-example
Make HDFS Custom Processors Example
기존 GetHDFS -> WriteHDFS 수정
properties 에 core-site.xml 이 필요한 것을 hdfs url, user 입력으로 치환
UserGroupInformation 사용
Dependency Chain
- nifi-custom-hdfs-processors (.jar) -> nifi-custom-hdfs-processors-nar -> nifi-standard-services-api-nar
NiFi version: 1.3
ex source: https://github.com/cukuzz/nifi-custom-hdfs-processors-example
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