Class SchemaAwareStreamWriter<T> (3.4.0)

A StreamWriter that can write data to BigQuery tables. The SchemaAwareStreamWriter is built on top of a StreamWriter, and it converts all data to Protobuf messages using provided converter then calls StreamWriter's append() method to write to BigQuery tables. It maintains all StreamWriter functions, but also provides an additional feature: schema update support, where if the BigQuery table schema is updated, users will be able to ingest data on the new schema after some time (in order of minutes).

NOTE: The schema update ability will be disabled when you pass in a table schema explicitly through the writer. It is recommended that user either use JsonStreamWriter (which fully manages table schema) or StreamWriter (which accepts proto format in raw and user will handle the schema update event themsevles). If you use this class, you need to be very cautious about possible mistmach between the writer's schema and the input data, any mismatch of the two will cause data corruption.

newBuilder that constructs a SchemaAwareStreamWriter builder with TableSchema being initialized by StreamWriter by default.

newBuilder that constructs a SchemaAwareStreamWriter builder.

The table schema passed in will be updated automatically when there is a schema update event. When used for Writer creation, it should be the latest schema. So when you are trying to reuse a stream, you should use Builder newBuilder( String streamOrTableName, BigQueryWriteClient client) instead, so the created Writer will be based on a fresh schema.

newBuilder that constructs a SchemaAwareStreamWriter builder with BigQuery client being initialized by StreamWriter by default.

The table schema passed in will be updated automatically when there is a schema update event. When used for Writer creation, it should be the latest schema. So when you are trying to reuse a stream, you should use Builder newBuilder( String streamOrTableName, BigQueryWriteClient client) instead, so the created Writer will be based on a fresh schema.

Writes a collection that contains objects to the BigQuery table by first converting the data to Protobuf messages, then using StreamWriter's append() to write the data at current end of stream. If there is a schema update, the current StreamWriter is closed. A new StreamWriter is created with the updated TableSchema.

Writes a collection that contains objects to the BigQuery table by first converting the data to Protobuf messages, then using StreamWriter's append() to write the data at the specified offset. If there is a schema update, the current StreamWriter is closed. A new StreamWriter is created with the updated TableSchema.

Closes the underlying StreamWriter.

Gets current descriptor

Returns the wait of a request in Client side before sending to the Server. Request could wait in Client because it reached the client side inflight request limit (adjustable when constructing the Writer). The value is the wait time for the last sent request. A constant high wait value indicates a need for more throughput, you can create a new Stream for to increase the throughput in exclusive stream case, or create a new Writer in the default stream case.

Gets the location of the destination

Sets the missing value interpretation map for the SchemaAwareStreamWriter. The input missingValueInterpretationMap is used for all append requests unless otherwise changed.