ASF GitHub Bot commented on BAHIR-110:

Github user emlaver commented on a diff in the pull request:

    --- Diff: 
    @@ -0,0  1,108 @@
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     package org.apache.bahir.cloudant
     import org.apache.bahir.cloudant.common.JsonStoreConfigManager
     class CloudantChangesConfig(protocol: String, host: String, dbName: String,
                                 indexName: String = null, viewName: String = 
                                (username: String, password: String, 
partitions: Int,
                                 maxInPartition: Int, minInPartition: Int, 
requestTimeout: Long,
                                 bulkSize: Int, schemaSampleSize: Int,
                                 createDBOnSave: Boolean, apiReceiver: String, 
selector: String,
                                 useQuery: Boolean, queryLimit: Int)
       extends CloudantConfig(protocol, host, dbName, indexName, 
viewName)(username, password,
         partitions, maxInPartition, minInPartition, requestTimeout, bulkSize, 
         createDBOnSave, apiReceiver, selector, useQuery, queryLimit) {
       override val defaultIndex: String = apiReceiver
       def getChangesUrl: String = {
         dbUrl   "/"   defaultIndex   "?include_docs=true&feed=normal"
       def getContinuousChangesUrl: String = {
         var url = dbUrl   "/"   defaultIndex   
         if (selector != null) {
           url = url   "&filter=_selector"
       override def getTotalUrl(url: String): String = {
         if (url.contains('?')) {
           if (selector != null) {
             url   "&limit=1&filter=_selector"
           } else {
             url   "&limit=1"
         } else {
           if (selector != null) {
             url   "?limit=1&filter=_selector"
           } else {
             url   "?limit=1"
    --- End diff --
    Removed in 47064b7.

> Replace use of _all_docs API with _changes API in all receivers
> ---------------------------------------------------------------
>                 Key: BAHIR-110
>                 URL: https://issues.apache.org/jira/browse/BAHIR-110
>             Project: Bahir
>          Issue Type: Improvement
>            Reporter: Esteban Laver
>   Original Estimate: 216h
>  Remaining Estimate: 216h
> Today we use the _changes API for Spark streaming receiver and _all_docs API 
> for non-streaming receiver. _all_docs API supports parallel reads (using 
> offset and range) but performance of _changes API is still better in most 
> cases (even with single threaded support).
> With this ticket we want to:
> a) re-implement all receivers using _changes API
> b) compare performance between the two implementations based on _changes and 
> _all_docs
> Based on the results in b) we could decide to either
> - replace _all_docs implementation with _changes based implementation OR
> - allow customers to pick one (with a solid documentation about pros and 
> cons) 

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