add bestEffortDeduplication config option

The connector is currently adding an InsertId per row, which is used by
BigQuery to dedupe rows that have the same insertId (in a 1 minute
window). Using insertIds throttles the ingestion rate to a maximum of
100k rows per second & 100 MB/s.

Insertions without a insertId disable best effort de-duplication [1],
which increases the ingestion quota to a maximum of 1 GB/s. For high
throughput applications, its desirable to disable dedupe, handling
duplication on the query side.

[1] https://cloud.google.com/bigquery/streaming-data-into-bigquery#disabling_best_effort_de-duplication

Signed-off-by: Alejandro del Castillo <[email protected]>

Author: Alejandro del Castillo

kcbq-connector/src/main/java/com/wepay/kafka/connect/bigquery/BigQuerySinkTask.java

@@ -173,7 +173,11 @@ private RowToInsert getRecordRow(SinkRecord record) {
     if (config.getBoolean(config.SANITIZE_FIELD_NAME_CONFIG)) {
       convertedRecord = FieldNameSanitizer.replaceInvalidKeys(convertedRecord);
     }
-    return RowToInsert.of(getRowId(record), convertedRecord);
+    if (config.getBoolean(config.BEST_EFFORT_DEDUPLICATION_CONFIG)) {
+      return RowToInsert.of(getRowId(record), convertedRecord);
+    } else {
+      return RowToInsert.of(convertedRecord);
+    }
   }
 
   private String getRowId(SinkRecord record) {

kcbq-connector/src/main/java/com/wepay/kafka/connect/bigquery/config/BigQuerySinkConfig.java

@@ -233,6 +233,15 @@ public class BigQuerySinkConfig extends AbstractConfig {
   private static final String TABLE_CREATE_DOC =
           "Automatically create BigQuery tables if they don't already exist";
 
+  public static final String BEST_EFFORT_DEDUPLICATION_CONFIG =         "bestEffortDeduplication";
+  private static final ConfigDef.Type BEST_EFFORT_DEDUPLICATION_TYPE =  ConfigDef.Type.BOOLEAN;
+  public static final Boolean BEST_EFFORT_DEDUPLICATION_DEFAULT =       true;
+  private static final ConfigDef.Importance BEST_EFFORT_DEDUPLICATION_IMPORTANCE =
+      ConfigDef.Importance.MEDIUM;
+  private static final String BEST_EFFORT_DEDUPLICATION_DOC =
+      "If false, Big Query best effort de-duplication will be disabled, which increases "
+      + "the streaming ingest quota, at the expense of not checking for duplicates";
+
   static {
     config = new ConfigDef()
         .define(
@@ -365,7 +374,13 @@ public class BigQuerySinkConfig extends AbstractConfig {
             TABLE_CREATE_DEFAULT,
             TABLE_CREATE_IMPORTANCE,
             TABLE_CREATE_DOC
-        );
+         ).define(
+            BEST_EFFORT_DEDUPLICATION_CONFIG,
+            BEST_EFFORT_DEDUPLICATION_TYPE,
+            BEST_EFFORT_DEDUPLICATION_DEFAULT,
+            BEST_EFFORT_DEDUPLICATION_IMPORTANCE,
+            BEST_EFFORT_DEDUPLICATION_DOC
+         );
   }
     /**
      * Throw an exception if the passed-in properties do not constitute a valid sink.