spark技术分享DataSourceRegister Contract — Registering Data Source Format
DataSourceRegister is a contract to register a DataSource provider under shortName alias (so it can be looked up by the alias not its fully-qualified class name).
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package org.apache.spark.sql.sources trait DataSourceRegister { def shortName(): String } |
Data Source Format Discovery — Registering Data Source By Short Name (Alias)
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Caution
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FIXME Describe how Java’s ServiceLoader works to find all DataSourceRegister provider classes on the CLASSPATH. |
Any DataSourceRegister has to register itself in META-INF/services/org.apache.spark.sql.sources.DataSourceRegister file to…FIXME
