feat: publish the Cloud Bigtable Change Streams (#1237)

* feat: publish the Cloud Bigtable Change Streams

PiperOrigin-RevId: 508465928

Source-Link: googleapis/googleapis@3770af2

Source-Link: googleapis/googleapis-gen@0280f1f
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protos/google/bigtable/v2/data.proto

@@ -486,9 +486,7 @@ message Mutation {
   }
 
   // A Mutation which deletes all cells from the containing row.
-  message DeleteFromRow {
-
-  }
+  message DeleteFromRow {}
 
   // Which of the possible Mutation types to apply.
   oneof mutation {
@@ -533,3 +531,30 @@ message ReadModifyWriteRule {
     int64 increment_amount = 4;
   }
 }
+
+// NOTE: This API is intended to be used by Apache Beam BigtableIO.
+// A partition of a change stream.
+message StreamPartition {
+  // The row range covered by this partition and is specified by
+  // [`start_key_closed`, `end_key_open`).
+  RowRange row_range = 1;
+}
+
+// NOTE: This API is intended to be used by Apache Beam BigtableIO.
+// The information required to continue reading the data from multiple
+// `StreamPartitions` from where a previous read left off.
+message StreamContinuationTokens {
+  // List of continuation tokens.
+  repeated StreamContinuationToken tokens = 1;
+}
+
+// NOTE: This API is intended to be used by Apache Beam BigtableIO.
+// The information required to continue reading the data from a
+// `StreamPartition` from where a previous read left off.
+message StreamContinuationToken {
+  // The partition that this token applies to.
+  StreamPartition partition = 1;
+
+  // An encoded position in the stream to restart reading from.
+  string token = 2;
+}

samples/generated/v2/bigtable.check_and_mutate_row.js

@@ -33,9 +33,8 @@ function main(tableName, rowKey) {
    * TODO(developer): Uncomment these variables before running the sample.
    */
   /**
-   *  Required. The unique name of the table to which the conditional mutation should be
-   *  applied.
-   *  Values are of the form
+   *  Required. The unique name of the table to which the conditional mutation
+   *  should be applied. Values are of the form
    *  `projects/<project>/instances/<instance>/tables/<table>`.
    */
   // const tableName = 'abc123'
@@ -45,7 +44,8 @@ function main(tableName, rowKey) {
    */
   // const appProfileId = 'abc123'
   /**
-   *  Required. The key of the row to which the conditional mutation should be applied.
+   *  Required. The key of the row to which the conditional mutation should be
+   *  applied.
    */
   // const rowKey = 'Buffer.from('string')'
   /**