xushiyan commented on code in PR #5179:
URL: https://github.com/apache/hudi/pull/5179#discussion_r841578441
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hudi-common/src/main/java/org/apache/hudi/common/model/HoodiePartitionMetadata.java:
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@@ -118,35 +136,112 @@ public void trySave(int taskPartitionId) {
}
}
+ private String getMetafileExtension() {
+ // To be backwards compatible, there is no extension to the properties
file base partition metafile
+ return format.isPresent() ? format.get().getFileExtension() :
StringUtils.EMPTY_STRING;
+ }
+
+ /**
+ * Write the partition metadata in the correct format in the given file path.
+ *
+ * @param filePath Path of the file to write
+ * @throws IOException
+ */
+ private void writeMetafile(Path filePath) throws IOException {
+ if (format.isPresent()) {
+ Schema schema = HoodieAvroUtils.getRecordKeySchema();
+
+ switch (format.get()) {
+ case PARQUET:
+ // Since we are only interested in saving metadata to the footer,
the schema, blocksizes and other
+ // parameters are not important.
+ MessageType type =
Types.buildMessage().optional(PrimitiveTypeName.INT64).named("dummyint").named("dummy");
+ HoodieAvroWriteSupport writeSupport = new
HoodieAvroWriteSupport(type, schema, Option.empty());
+ try (ParquetWriter writer = new ParquetWriter(filePath,
writeSupport, CompressionCodecName.UNCOMPRESSED, 1024, 1024)) {
+ for (String key : props.stringPropertyNames()) {
+ writeSupport.addFooterMetadata(key, props.getProperty(key));
+ }
+ }
+ break;
+ case ORC:
+ // Since we are only interested in saving metadata to the footer,
the schema, blocksizes and other
+ // parameters are not important.
+ OrcFile.WriterOptions writerOptions =
OrcFile.writerOptions(fs.getConf()).fileSystem(fs)
+ .setSchema(AvroOrcUtils.createOrcSchema(schema));
+ try (Writer writer = OrcFile.createWriter(filePath, writerOptions)) {
+ for (String key : props.stringPropertyNames()) {
+ writer.addUserMetadata(key,
ByteBuffer.wrap(props.getProperty(key).getBytes()));
+ }
+ }
+ break;
+ default:
+ throw new HoodieException("Unsupported format for partition
metafiles: " + format.get());
+ }
+ } else {
+ // Backwards compatible properties file format
+ FSDataOutputStream os = fs.create(filePath, true);
+ props.store(os, "partition metadata");
+ os.hsync();
+ os.hflush();
+ os.close();
+ }
+ }
+
/**
* Read out the metadata for this partition.
*/
public void readFromFS() throws IOException {
- FSDataInputStream is = null;
- try {
- Path metaFile = new Path(partitionPath, HOODIE_PARTITION_METAFILE);
- is = fs.open(metaFile);
+ // first try reading the text format (legacy, currently widespread)
Review Comment:
~looks good. just 1 question: this is not a static method why we can't rely
on Option<HoodieFileFormat> format to read instead of try-n-error~
ok i see the reason, constructing HoodiePartitionMetadata may not guarantee
format is init'ed.
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