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nifi 入门英文文档
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大数据分析工具nifi 英文入门文档。This book gives you an overview of NiFi, why it s useful, and some common use cases with technical information to help you et started, debug, and manage your own dataflows
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These materials are © 2018 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited.
These materials are © 2018 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited.
Apache
®
NiFi
™
Hortonworks and Attunity Special Edition
by Christopher Gambino
Solutions Engineer, Hortonworks
Dan Rice
Manager, Solutions Engineering, Hortonworks
Joseph Niemiec
Systems Architect, Hortonworks
Mark Johnson
Passionate Distributed Computer and
Data Integration Technologist
Jordan Martz
Director of Technology Solutions, Attunity
These materials are © 2018 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited.
Apache
®
NiFi™ For Dummies
®
, Hortonworks and Attunity
Special Edition
Published by: John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, www.wiley.com
Copyright © 2018 by John Wiley & Sons, Inc., Hoboken, New Jersey
Published simultaneously in Canada
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.
Trademarks: Wiley, For Dummies, the Dummies Man logo, Dummies.com, Making Everything
Easier, and related trade dress are trademarks or registered trademarks of John Wiley & Sons,
Inc. and may not be used without written permission. Apache, Apache NiFi, NiFi, Hadoop, Mini,
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Foundation in the United States and/or other countries. No endorsement by The Apache Software
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Table of Contents
FOREWORD ..........................................................................................................v
INTRODUCTION ............................................................................................... 1
About This Book ................................................................................... 1
Icons Used in This Book ....................................................................... 1
Beyond the Book .................................................................................. 1
Where to Go from Here ....................................................................... 2
CHAPTER 1: Why NiFi? ............................................................................................ 3
The Advantages to Apache NiFi .......................................................... 3
NiFi Core Concepts ............................................................................... 4
NiFi Expression Language and Other Query Languages ................. 7
JSONPath .......................................................................................... 9
XPath/XQuery .................................................................................. 9
CHAPTER 2: Getting Started with NiFi .................................................... 11
Importing a NiFi Template .................................................................12
Adding a NiFi Template to the NiFi Canvas ..................................... 13
Setting Up and Running the Hello World Example ........................ 15
Conguring HandleHttpRequest NiFi processor ....................... 15
Conguring the other processors ............................................... 16
Running the Hello World example ..............................................17
Understanding the Hello World Example ........................................ 18
CHAPTER 3: General Debugging & Monitoring ................................. 19
Debugging through the User Interface ............................................ 19
Status bar ....................................................................................... 20
Summary ........................................................................................ 20
Status History ................................................................................ 22
Conguring Backpressure ................................................................. 22
Checking Provenance......................................................................... 24
Checking the NiFi Server Logs........................................................... 26
CHAPTER 4: NiFi Use Cases .............................................................................. 27
Importing Datasets into a Database ................................................ 28
Listening for HTTP Posts .................................................................... 29
Polling a RESTFul API to Extract a JSON Attribute ........................... 30
Table of Contents
iii
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