Mike Percy created FLUME-1941:
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Summary: Support defaults or inheritance in configs
Key: FLUME-1941
URL: https://issues.apache.org/jira/browse/FLUME-1941
Project: Flume
Issue Type: New Feature
Components: Configuration
Reporter: Mike Percy
Fix For: v1.4.0
Proposal to support defaults or inheritance in configs.
The idea is to create a "prototypal" component config, such as a source or
sink, which is not necessarily instantiated but is used to avoid repetitive
configurations when creating multiple components of the same type. A great
example of this is users who define 5 HDFS sinks to increase write parallelism,
but they each contain many of the same configuration parameters and differ only
in their name and path.
Basic idea:
{noformat}
agent.sinks.sink-proto-1.type = my-sink
agent.sinks.sink-proto-1.path = /var/log/foo/bar
agent.sinks.sink-proto-1.serializer = MySerializer$Builder
agent.sinks.sink-proto-1.credentials = mpercy
agent.sinks.sink-1.__prototype__ = sink-proto-1
agent.sinks.sink-1.path = /var/log/baz/blam
agent.sinks.sink-2.__prototype__ = sink-proto-1
agent.sinks.sink-2.path = /var/log/glerp/bazinga
{noformat}
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