tree a23a5d2f3aeb4a01595da282e4816ed26d0ea938
parent 491a168da33c2811e9945f1e037a2df5ddc57ccc
author chitralverma <chitralverma@gmail.com> 1591268494 +0800
committer William Guo <guoyp@apache.org> 1591268494 +0800

[GRIFFIN-326] New Data Connector for Elasticsearch

**What changes were proposed in this pull request?**

This ticket proposes the following changes,
- Deprecate the current implementation in favour of the direct implementation in the official [elasticsearch-hadoop](https://github.com/elastic/elasticsearch-hadoop/tree/master/spark/sql-20) library.
- This library is built on DataSource API built on spark 2.2.x+ and thus brings support for filter pushdowns, column pruning, unified read and write and additional optimizations.
- Many configuration options are available for ES connectivity, [check here](https://github.com/elastic/elasticsearch-hadoop/blob/master/mr/src/main/java/org/elasticsearch/hadoop/cfg/ConfigurationOptions.java).
- Any filters can be applied as expressions directly on the data frame and are pushed automatically to the source.

**Does this PR introduce any user-facing change?**
Yes. As mentioned above, the old connector has been deprecated and config structure for Elasticsearch data connector has changed now.

**How was this patch tested?**
Griffin test suite and additional unit test cases

Author: chitralverma <chitralverma@gmail.com>

Closes #569 from chitralverma/new-elastic-search-connector.