vvysotskyi commented on a change in pull request #1646: DRILL-6852: Adapt
current Parquet Metadata cache implementation to use Drill Metastore API
URL: https://github.com/apache/drill/pull/1646#discussion_r260208959
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/metadata/Metadata.java
##########
@@ -533,36 +536,27 @@ private ParquetFileMetadata_v3
getParquetFileMetadata_v3(ParquetTableMetadata_v3
/**
* Serialize parquet metadata to json and write to a file.
*
- * @param parquetTableMetadata parquet table metadata
+ * @param parquetTableMetadata parquet table or directory metadata
* @param p file path
+ * @param fs Drill file system
+ * @throws IOException if metadata can't be serialized
*/
- private void writeFile(ParquetTableMetadata_v3 parquetTableMetadata, Path p,
FileSystem fs) throws IOException {
+ private void writeFile(Object parquetTableMetadata, Path p, FileSystem fs)
throws IOException {
JsonFactory jsonFactory = new JsonFactory();
jsonFactory.configure(Feature.AUTO_CLOSE_TARGET, false);
jsonFactory.configure(JsonParser.Feature.AUTO_CLOSE_SOURCE, false);
ObjectMapper mapper = new ObjectMapper(jsonFactory);
SimpleModule module = new SimpleModule();
- module.addSerializer(ColumnMetadata_v3.class, new
ColumnMetadata_v3.Serializer());
+ if (parquetTableMetadata instanceof ParquetTableMetadata_v3) {
+ module.addSerializer(ColumnMetadata_v3.class, new
ColumnMetadata_v3.Serializer());
+ }
mapper.registerModule(module);
OutputStream os = fs.create(p);
mapper.writerWithDefaultPrettyPrinter().writeValue(os,
parquetTableMetadata);
os.flush();
os.close();
}
- private void writeFile(ParquetTableMetadataDirs parquetTableMetadataDirs,
Path p, FileSystem fs) throws IOException {
Review comment:
This method contains code almost the same as the previous one, so it was
removed and the previous one is used.
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