[jira] [Created] (GOBBLIN-1179) Add a typed config to replace properties

["Alex Li (Jira)" <ji...@apache.org>]

Alex Li created GOBBLIN-1179:
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             Summary: Add a typed config to replace properties
                 Key: GOBBLIN-1179
                 URL: https://issues.apache.org/jira/browse/GOBBLIN-1179
             Project: Apache Gobblin
          Issue Type: Task
            Reporter: Alex Li


Add a typed config to replace *_properties.get(“ini.file.userName”)_* with *config.userName*

The gobblin config file is an ini file. Java loads the ini file to a properties instance. The way to use the config information is to get from the properties.
|workUnitState.getPropAsBoolean(BULK_API_USE_QUERY_ALL)|
|workUnitState.getPropAsInt(FETCH_RETRY_LIMIT_KEY, DEFAULT_FETCH_RETRY_LIMIT)|
|Math.max(MIN_SIZE,Math.min(MAX_SIZE, workUnitState.getPropAsInt(PARTITION_SIZE, DEFAULT_SIZE))); 
// partition size must be >= min and <= max, otherwise use default|

Problems
 # No consistent key naming model
 * A long dot-separated key string is used, easy to run into typos. The config code is pretty verbose: We use *properties.getProp(key, default)*
 * Key collision if the same type is used in multiple places, e.g kafka.brokers


 # No ownership management
 * in gobblin connector package: We have multiple constant static classes. GobblinKeys, QueryBaseKeys, GaapKeys, and SalesforceConnectorKeys.We can even directly read config values by state.getProp(*“my.key”*) without creating any constant key.


 # No static validation
 * Required & default value
 * Type check
 * Date range
 * Enum


 # No dependency check
 * If users set to *useGaap=true*, there must be *gaap.url* and *gaap.credential*. And this needs to be verified at both runtime and compile time.

 



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