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

Class PartitionMetadata

  • All Implemented Interfaces:
    java.io.Serializable
    @DefaultCoder(org.apache.beam.sdk.extensions.avro.coders.AvroCoder.class)
public class PartitionMetadata
extends java.lang.Object
implements java.io.Serializable
    Model for the partition metadata database table used in the Connector.
    See Also:
    Serialized Form

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  PartitionMetadata.Builder
      Partition metadata builder for better user experience.
      static class  PartitionMetadata.State
      The state at which a partition can be in the system: CREATED: the partition has been created, but no query has been done against it yet.

    • Constructor Summary

      Constructors 
      Constructor Description
      PartitionMetadata​(java.lang.String partitionToken, java.util.HashSet<java.lang.String> parentTokens, com.google.cloud.Timestamp startTimestamp, com.google.cloud.Timestamp endTimestamp, long heartbeatMillis, PartitionMetadata.State state, com.google.cloud.Timestamp watermark, com.google.cloud.Timestamp createdAt, com.google.cloud.Timestamp scheduledAt, com.google.cloud.Timestamp runningAt, com.google.cloud.Timestamp finishedAt)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object o)  
      com.google.cloud.Timestamp getCreatedAt()
      The time at which this partition was first detected and created in the metadata table.
      com.google.cloud.Timestamp getEndTimestamp()
      The end time for querying this given partition.
      com.google.cloud.Timestamp getFinishedAt()
      The time at which the connector finished processing this partition.
      long getHeartbeatMillis()
      The number of milliseconds after the stream is idle, which a heartbeat record will be emitted in the change stream query.
      java.util.HashSet<java.lang.String> getParentTokens()
      The unique partition identifiers of the parent partitions where this child partition originated from.
      java.lang.String getPartitionToken()
      Unique partition identifier, which can be used to perform a change stream query.
      com.google.cloud.Timestamp getRunningAt()
      The time at which the connector started processing this partition.
      com.google.cloud.Timestamp getScheduledAt()
      The time at which this partition was scheduled to be queried.
      com.google.cloud.Timestamp getStartTimestamp()
      It is the start time at which the partition started existing in Cloud Spanner.
      PartitionMetadata.State getState()
      The state in which the current partition is in.
      com.google.cloud.Timestamp getWatermark()
      The time for which all records with a timestamp less than it have been processed.
      int hashCode()  
      static PartitionMetadata.Builder newBuilder()
      Creates a builder for constructing a partition metadata instance.
      PartitionMetadata.Builder toBuilder()
      Transforms the instance into a builder, so field values can be modified.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • PartitionMetadata

        public PartitionMetadata​(java.lang.String partitionToken,
                         @Nullable
                         java.util.HashSet<java.lang.String> parentTokens,
                         com.google.cloud.Timestamp startTimestamp,
                         com.google.cloud.Timestamp endTimestamp,
                         long heartbeatMillis,
                         PartitionMetadata.State state,
                         com.google.cloud.Timestamp watermark,
                         com.google.cloud.Timestamp createdAt,
                         @Nullable
                         com.google.cloud.Timestamp scheduledAt,
                         @Nullable
                         com.google.cloud.Timestamp runningAt,
                         @Nullable
                         com.google.cloud.Timestamp finishedAt)

    • Method Detail

      • getPartitionToken

        public java.lang.String getPartitionToken()
        Unique partition identifier, which can be used to perform a change stream query.

      • getParentTokens

        @Nullable
public java.util.HashSet<java.lang.String> getParentTokens()
        The unique partition identifiers of the parent partitions where this child partition originated from.

      • getStartTimestamp

        public com.google.cloud.Timestamp getStartTimestamp()
        It is the start time at which the partition started existing in Cloud Spanner. This timestamp can be used to perform a change stream query for the partition.

      • getEndTimestamp

        public com.google.cloud.Timestamp getEndTimestamp()
        The end time for querying this given partition. It does not necessarily mean that the partition exists until this time, but it will be the timestamp used on its change stream query.

      • getHeartbeatMillis

        public long getHeartbeatMillis()
        The number of milliseconds after the stream is idle, which a heartbeat record will be emitted in the change stream query.

      • getWatermark

        public com.google.cloud.Timestamp getWatermark()
        The time for which all records with a timestamp less than it have been processed.

      • getCreatedAt

        public com.google.cloud.Timestamp getCreatedAt()
        The time at which this partition was first detected and created in the metadata table.

      • getScheduledAt

        @Nullable
public com.google.cloud.Timestamp getScheduledAt()
        The time at which this partition was scheduled to be queried.

      • getRunningAt

        @Nullable
public com.google.cloud.Timestamp getRunningAt()
        The time at which the connector started processing this partition.

      • getFinishedAt

        @Nullable
public com.google.cloud.Timestamp getFinishedAt()
        The time at which the connector finished processing this partition.

      • toBuilder

        public PartitionMetadata.Builder toBuilder()
        Transforms the instance into a builder, so field values can be modified.

      • equals

        public boolean equals​(@Nullable
                      java.lang.Object o)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • newBuilder

        public static PartitionMetadata.Builder newBuilder()
        Creates a builder for constructing a partition metadata instance.