BroadcastableSchemaInfo (cassandra-analytics-core 0.3.0 API)

java.lang.Object
- org.apache.cassandra.spark.bulkwriter.BroadcastableSchemaInfo

All Implemented Interfaces:

java.io.Serializable
```
public final class BroadcastableSchemaInfo
extends java.lang.Object
implements java.io.Serializable
```
Broadcastable wrapper for schema information with ZERO transient fields to optimize Spark broadcasting.
Contains BroadcastableTableSchema (pre-computed schema data) and UDT statements. Executors reconstruct CassandraSchemaInfo and TableSchema from these fields.
Why ZERO transient fields matters:
Spark's SizeEstimator uses reflection to estimate object sizes before broadcasting. Each transient field forces SizeEstimator to inspect the field's type hierarchy, which is expensive. Logger references are particularly costly due to their deep object graphs (appenders, layouts, contexts). By eliminating ALL transient fields and Logger references, we:
- Minimize SizeEstimator reflection overhead during broadcast preparation
- Reduce broadcast variable serialization size
- Avoid accidental serialization of non-serializable objects
See Also:

Serialized Form

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static BroadcastableSchemaInfo`	`from(SchemaInfo source)`	Creates a BroadcastableSchemaInfo from a source SchemaInfo.
`BroadcastableTableSchema`	`getBroadcastableTableSchema()`
`java.util.Set<java.lang.String>`	`getUserDefinedTypeStatements()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

from
```
public static BroadcastableSchemaInfo from(@NotNull
                                           SchemaInfo source)
```
Creates a BroadcastableSchemaInfo from a source SchemaInfo. Extracts BroadcastableTableSchema to avoid serializing Logger.

Parameters:

source - the source SchemaInfo (typically CassandraSchemaInfo)

getBroadcastableTableSchema

public BroadcastableTableSchema getBroadcastableTableSchema()

getUserDefinedTypeStatements

@NotNull
public java.util.Set<java.lang.String> getUserDefinedTypeStatements()