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https://issues.apache.org/jira/browse/GOBBLIN-1225?focusedWorklogId=534674&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-534674
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ASF GitHub Bot logged work on GOBBLIN-1225:
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Author: ASF GitHub Bot
Created on: 12/Jan/21 05:11
Start Date: 12/Jan/21 05:11
Worklog Time Spent: 10m
Work Description: chris9692 opened a new pull request #3198:
URL: https://github.com/apache/incubator-gobblin/pull/3198
Dear Gobblin maintainers,
Please accept this PR. I understand that it will not be reviewed until I
have checked off all the steps below!
### JIRA
- [X] My PR addresses the following [Gobblin
JIRA](https://issues.apache.org/jira/browse/GOBBLIN/) issues and references
them in the PR title. For example, "[GOBBLIN-XXX] My Gobblin PR"
- https://issues.apache.org/jira/browse/GOBBLIN-1225
### Description
- [X] Here are some details about my PR, including screenshots (if
applicable):
Many HTTP data sources, including OData and GraphQL based data sources, use
a set of common HTTP request methods,
but their parameters can vary significantly case by case. The Gobblin
ecosystem has multiple connectors that were
built to suite those needs, for example, the Salesforce connector, the
Google Search Console connector, etc.
Multistage connector framework is a paradigm that makes connectors more
generic and more reusable. We have used this framework to address the huge
variety challenge in data integration with external data sources.
HTTP data sources are the top beneficiary of this framework, including Rest
API, OData, and SOAP based data sources. S3 and GCS (Google Cloud Storage) data
sources can also benefit from it in small data volumes that are less than 10TB,
without using SDK.
We have also verified the HTTP Multistage connector can greatly simplify
data ingestion from Salesforce.com. However, this PR doesn't included the
necessary component, CSV Extractor, yet.
This PR includes following functionalities:
- This PR contains a separate multistage module that works with HTTP
data sources
- It supports HTTP GET, PUT, POST, and DELETE operations
- It supports nested JSON format
- It supports Rest API calls and its derived OData service
- It supports following ways of pagination
○ By offset and page size
○ By page number
○ By a total record count
○ By signal of an empty response
○ By next page URL
○ By a cursor or next page locator
- It supports session state control as a mechanism of pagination or
asynchronous requests
- It supports pulling files from GCS or S3 via HTTP requests
- It supports field project, including nested field projection, based
on a given schema
### Tests
- [X] My PR adds the following unit tests __OR__ does not need testing for
this extremely good reason:
All 113 unit tests were successful.
### Commits
- [X] My commits all reference JIRA issues in their subject lines, and I
have squashed multiple commits if they address the same issue. In addition, my
commits follow the guidelines from "[How to write a good git commit
message](http://chris.beams.io/posts/git-commit/)":
1. Subject is separated from body by a blank line
2. Subject is limited to 50 ##characters
3. Subject does not end with a period
4. Subject uses the imperative mood ("add", not "adding")
5. Body wraps at 72 characters
6. Body explains "what" and "why", not "how"
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Issue Time Tracking
-------------------
Worklog Id: (was: 534674)
Remaining Estimate: 0h
Time Spent: 10m
> Multistage Generic Connector for HTTP Protocol and JSON Format
> --------------------------------------------------------------
>
> Key: GOBBLIN-1225
> URL: https://issues.apache.org/jira/browse/GOBBLIN-1225
> Project: Apache Gobblin
> Issue Type: Sub-task
> Components: gobblin-connectors
> Reporter: Chris Li
> Assignee: Shirshanka Das
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This change includes:
> * Multistage connector base classes
> * HttpSource class
> * JsonExtractor class
> * Utility classes
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