Package org.apache.beam.sdk.io.gcp.spanner.changestreams

Class ChangeStreamsConstants

  • public class ChangeStreamsConstants
extends java.lang.Object
    Single place for defining the constants used in the Spanner.readChangeStreams() connector.

    • Method Summary

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • MAX_INCLUSIVE_END_AT

        public static final com.google.cloud.Timestamp MAX_INCLUSIVE_END_AT
        Represents the max end at that can be specified for a change stream.

      • DEFAULT_CHANGE_STREAM_NAME

        public static final java.lang.String DEFAULT_CHANGE_STREAM_NAME
        The default change stream name for a change stream query is the empty String.
        See Also:
        Constant Field Values

      • DEFAULT_INCLUSIVE_START_AT

        public static final com.google.cloud.Timestamp DEFAULT_INCLUSIVE_START_AT
        The default start timestamp for a change stream query is Timestamp.MIN_VALUE.

      • DEFAULT_INCLUSIVE_END_AT

        public static final com.google.cloud.Timestamp DEFAULT_INCLUSIVE_END_AT
        The default end timestamp for a change stream query is MAX_INCLUSIVE_END_AT.

      • DEFAULT_RPC_PRIORITY

        public static final com.google.cloud.spanner.Options.RpcPriority DEFAULT_RPC_PRIORITY
        The default priority for a change stream query is Options.RpcPriority.HIGH.

      • THROUGHPUT_WINDOW_SECONDS

        public static final int THROUGHPUT_WINDOW_SECONDS
        The sliding window size in seconds for throughput reporting.
        See Also:
        Constant Field Values

      • SAMPLE_PARTITION

        public static final PartitionMetadata SAMPLE_PARTITION
        We use a bogus partition here to estimate the average size of a partition metadata record.

        The only dynamically allocated size field here is the "parentTokens", which is a set and can expand. In practice, however, partitions have 1 to 2 parents at most.

      • DEFAULT_WATERMARK_REFRESH_RATE

        public static final org.joda.time.Duration DEFAULT_WATERMARK_REFRESH_RATE
        The default period for which we will re-compute the watermark of the DetectNewPartitionsDoFn stage.

    • Constructor Detail

      • ChangeStreamsConstants

        public ChangeStreamsConstants()