Write¶

Write is an abstraction of writers.

Contract¶

Description¶

String description()

Defaults to the name of this Write class

Used when:

• Write is requested to toBatch and toStreaming (for reporting purposes)

Supported CustomMetrics¶

CustomMetric[] supportedCustomMetrics()

Defaults to no CustomMetrics

Used when:

• V2ExistingTableWriteExec is requested for customMetrics
• StreamExecution (Spark Structured Streaming) is requested for a StreamingWrite

Creating BatchWrite¶

BatchWrite toBatch()

toBatch throws an UnsupportedOperationException by default:

[description]: Batch write is not supported

toBatch should be implemented for Tables that create Writes that reports BATCH_WRITE support in their capabilities.

Used when:

• V2ExistingTableWriteExec is requested to run
• TableWriteExecHelper is requested to writeToTable

Creating StreamingWrite¶

StreamingWrite toStreaming()

toStreaming throws an UnsupportedOperationException by default:

[description]: Streaming write is not supported

toStreaming should be implemented for Tables that create Writes that reports STREAMING_WRITE support in their capabilities.

Used when:

• StreamExecution (Spark Structured Streaming) is requested for a StreamingWrite

Implementations¶

• ConsoleTable (Spark Structured Streaming)
• WriteBuilder
• FileWrite
• ForeachWrite (Spark Structured Streaming)
• KafkaWrite
• MemoryWrite (Spark Structured Streaming)
• NoopWrite
• RequiresDistributionAndOrdering
• V1Write