Add created_at and last_updated_at timestamps

app/src/main/java/org/vss/impl/postgres/PostgresBackendImpl.java

@@ -2,6 +2,9 @@
 
 import com.google.inject.Inject;
 import com.google.protobuf.ByteString;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -151,36 +154,41 @@ private Query buildPutObjectQuery(DSLContext dsl, VssDbRecord vssRecord) {
  private Query buildNonConditionalUpsertRecordQuery(DSLContext dsl, VssDbRecord vssRecord) {
  return dsl.insertInto(VSS_DB)
  .values(vssRecord.getStoreId(), vssRecord.getKey(),
- vssRecord.getValue(), 1)
+ vssRecord.getValue(), 1, vssRecord.getCreatedAt(), vssRecord.getLastUpdatedAt())
  .onConflict(VSS_DB.STORE_ID, VSS_DB.KEY)
  .doUpdate()
  .set(VSS_DB.VALUE, vssRecord.getValue())
- .set(VSS_DB.VERSION, 1L);
+ .set(VSS_DB.VERSION, 1L)
+ .set(VSS_DB.LAST_UPDATED_AT, vssRecord.getLastUpdatedAt());
  }
 
  private Insert<VssDbRecord> buildConditionalInsertRecordQuery(DSLContext dsl,
  VssDbRecord vssRecord) {
  return dsl.insertInto(VSS_DB)
  .values(vssRecord.getStoreId(), vssRecord.getKey(),
- vssRecord.getValue(), 1)
+ vssRecord.getValue(), 1, vssRecord.getCreatedAt(), vssRecord.getLastUpdatedAt())
  .onDuplicateKeyIgnore();
  }
 
  private Update<VssDbRecord> buildConditionalUpdateRecordQuery(DSLContext dsl, VssDbRecord vssRecord) {
  return dsl.update(VSS_DB)
  .set(Map.of(VSS_DB.VALUE, vssRecord.getValue(),
- VSS_DB.VERSION, vssRecord.getVersion() + 1))
+ VSS_DB.VERSION, vssRecord.getVersion() + 1,
+ VSS_DB.LAST_UPDATED_AT, vssRecord.getLastUpdatedAt()))
  .where(VSS_DB.STORE_ID.eq(vssRecord.getStoreId())
  .and(VSS_DB.KEY.eq(vssRecord.getKey()))
  .and(VSS_DB.VERSION.eq(vssRecord.getVersion())));
  }
 
  private VssDbRecord buildVssRecord(String storeId, KeyValue kv) {
+ OffsetDateTime today = OffsetDateTime.now(ZoneOffset.UTC).truncatedTo(ChronoUnit.DAYS);
  return new VssDbRecord()
  .setStoreId(storeId)
  .setKey(kv.getKey())
  .setValue(kv.getValue().toByteArray())
- .setVersion(kv.getVersion());
+ .setVersion(kv.getVersion())
+ .setCreatedAt(today)
+ .setLastUpdatedAt(today);
  }
 
  @Override

app/src/main/java/org/vss/impl/postgres/sql/v0_create_vss_db.sql

@@ -3,5 +3,7 @@ CREATE TABLE vss_db (
  key character varying(600) NOT NULL,
  value bytea NULL,
  version bigint NOT NULL,
+ created_at TIMESTAMP WITH TIME ZONE,
+ last_updated_at TIMESTAMP WITH TIME ZONE,
  PRIMARY KEY (store_id, key)
 );

app/src/test/java/org/vss/impl/postgres/PostgresBackendImplIntegrationTest.java

@@ -48,9 +48,11 @@ void destroy() throws Exception {
  private void createTable(DSLContext dslContext) {
  dslContext.execute("CREATE TABLE vss_db ("
  + "store_id character varying(120) NOT NULL CHECK (store_id <> ''),"
- + "key character varying(120) NOT NULL,"
+ + "key character varying(600) NOT NULL,"
  + "value bytea NULL,"
  + "version bigint NOT NULL,"
+ + "created_at TIMESTAMP WITH TIME ZONE,"
+ + "last_updated_at TIMESTAMP WITH TIME ZONE,"
  + "PRIMARY KEY (store_id, key)"
  + ");");
  }