Package com.linkedin.davinci.replication.merge

Class MergeGenericRecord

java.lang.Object
com.linkedin.davinci.replication.merge.MergeGenericRecord
All Implemented Interfaces:
Merge<org.apache.avro.generic.GenericRecord>
public class MergeGenericRecord extends Object
Implementations of the API defined in Merge based on V1 metadata timestamp Schema generated by RmdSchemaGeneratorV1. All the implementations assume replication metadata format is union record type [long, record] where record is top-level fieldName:timestamp format. 1. Currently collection merging is not supported as replication metadata does not support it yet. 2. schema evolution is not supported, so it assumes incoming and old schema are same else else throws VeniceException 3. Assumes new value to be GenericRecord type, does not support non-record values.

  • Constructor Details

  • Method Details

    • put

      public ValueAndRmd<org.apache.avro.generic.GenericRecord> put(ValueAndRmd<org.apache.avro.generic.GenericRecord> oldValueAndRmd, org.apache.avro.generic.GenericRecord newValue, long putOperationTimestamp, int putOperationColoID)
      Three important requirements regarding input params: 1. Old value and RMD must share the same value schema ID. 2. Old value schema must be a superset of the new value schema. 3. Neither old value nor old RMD should be null.
      Parameters:
      oldValueAndRmd - the old value and replication metadata which are persisted in the server prior to the write operation. Old value should NOT be null. If the old value does not exist, the caller of this method must create a GenericRecord of the old value with default values set for all fields.
      newValue - a record with all fields populated and with one of the registered value schemas
      putOperationTimestamp - the timestamp of the incoming write operation
      putOperationColoID - ID of the colo/fabric where this PUT request was originally received.
      Returns:
      the resulting ValueAndRmd after merging the old one with the incoming write operation. The returned object is guaranteed to be "==" to the input oldValueAndReplicationMetadata object and the internal members of the object are possibly mutated.

    • delete

      public ValueAndRmd<org.apache.avro.generic.GenericRecord> delete(ValueAndRmd<org.apache.avro.generic.GenericRecord> oldValueAndRmd, long deleteOperationTimestamp, int deleteOperationColoID)
      Parameters:
      oldValueAndRmd - the old value and replication metadata which are persisted in the server prior to the write operation
      deleteOperationTimestamp - the timestamp of the incoming delete operation
      deleteOperationColoID - ID of the colo/fabric where this DELETE request was originally received.
      Returns:
      the resulting ValueAndRmd after merging the old one with the incoming delete operation. The returned object is guaranteed to be "==" to the input oldValueAndReplicationMetadata object and the internal members of the object are possibly mutated.

    • update

      public ValueAndRmd<org.apache.avro.generic.GenericRecord> update(ValueAndRmd<org.apache.avro.generic.GenericRecord> oldValueAndRmd, Lazy<org.apache.avro.generic.GenericRecord> writeComputeRecord, org.apache.avro.Schema currValueSchema, long updateOperationTimestamp, int updateOperationColoID)
      Parameters:
      oldValueAndRmd - the old value and replication metadata which are persisted in the server prior to the write operation
      writeComputeRecord - a record with a write compute schema
      currValueSchema - Schema of the current value that is to-be-updated here.
      updateOperationTimestamp - the timestamp of the incoming write operation
      updateOperationColoID - ID of the colo/fabric where this UPDATE request was originally received.
      Returns:
      the resulting ValueAndRmd after merging the old one with the incoming write operation. The returned object is guaranteed to be "==" to the input oldValueAndReplicationMetadata object and the internal members of the object are possibly mutated.

    • putWithRecordLevelTimestamp

      protected ValueAndRmd<org.apache.avro.generic.GenericRecord> putWithRecordLevelTimestamp(long oldTimestamp, ValueAndRmd<org.apache.avro.generic.GenericRecord> oldValueAndRmd, long putOperationTimestamp, org.apache.avro.generic.GenericRecord newValue)

    • deleteWithValueLevelTimestamp

      protected ValueAndRmd<org.apache.avro.generic.GenericRecord> deleteWithValueLevelTimestamp(long oldTimestamp, long deleteOperationTimestamp, ValueAndRmd<org.apache.avro.generic.GenericRecord> oldValueAndRmd)

    • updateReplicationCheckpointVector

      protected void updateReplicationCheckpointVector(org.apache.avro.generic.GenericRecord oldRmd)