wuchong commented on code in PR #20469:
URL: https://github.com/apache/flink/pull/20469#discussion_r942380136
##########
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/connectors/hive/HiveOptions.java:
##########
@@ -95,6 +95,20 @@ public class HiveOptions {
+ " When the value is over estimated,
Flink will tend to pack Hive's data into less splits, which will be helpful
when Hive's table contains many small files."
+ " And vice versa. It only works for the
Hive table stored as ORC format.");
+ public static final ConfigOption<String> SINK_PARTITION_COMMIT_POLICY_KIND
=
+ key("sink.partition-commit.policy.kind")
+ .stringType()
+ .defaultValue("metastore,success-file")
+ .withDescription(
+ "Policy to commit a partition is to notify the
downstream"
+ + " application that the partition has
finished writing, the partition"
+ + " is ready to be read."
+ + " metastore: add partition to metastore.
"
+ + " success-file: add '_success' file to
directory."
Review Comment:
```
success-file: add a success file to the partition directory. The success
file name can be configured by the 'sink.partition-commit.success-file.name'
option.
```
##########
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/connectors/hive/HiveOptions.java:
##########
@@ -95,6 +95,20 @@ public class HiveOptions {
+ " When the value is over estimated,
Flink will tend to pack Hive's data into less splits, which will be helpful
when Hive's table contains many small files."
+ " And vice versa. It only works for the
Hive table stored as ORC format.");
+ public static final ConfigOption<String> SINK_PARTITION_COMMIT_POLICY_KIND
=
Review Comment:
Add a comment to explain why we need to re-define a same configuration here,
e.g.,
```java
/**
* Hive users usually commit partition for metastore and a _SUCCESS
file. That's why we
* create a same option with {@link
* FileSystemConnectorOptions#SINK_PARTITION_COMMIT_POLICY_KIND} with
different default value.
*/
```
##########
flink-connectors/flink-connector-files/src/test/java/org/apache/flink/connector/file/table/FileSystemCommitterTest.java:
##########
@@ -173,7 +206,14 @@ void testEmptyPartition() throws Exception {
assertThat(emptyPartitionFile).exists();
assertThat(emptyPartitionFile).isDirectory();
- assertThat(emptyPartitionFile).isEmptyDirectory();
+ files =
+ FileUtils.listFilesInDirectory(
+ Paths.get(emptyPartitionFile.getPath()),
+ (path) ->
+ !path.toFile().isHidden()
+ &&
!path.toFile().getName().startsWith("_"))
Review Comment:
I think this can be simplified into
```java
assertThat(emptyPartitionFile)
.isDirectoryNotContaining(file ->
!file.getName().equals("_SUCCESS"));
```
There shouldn't be hidden files in the directory, right?
##########
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/connectors/hive/HiveTableSink.java:
##########
@@ -337,6 +340,12 @@ private DataStreamSink<Row> createBatchSink(
builder.setTempPath(
new
org.apache.flink.core.fs.Path(toStagingDir(stagingParentDir, jobConf)));
builder.setOutputFileConfig(fileNaming);
+ builder.setIdentifier(identifier);
+
builder.setPolicyKind(conf.get(HiveOptions.SINK_PARTITION_COMMIT_POLICY_KIND));
+ builder.setCustomClass(
+
conf.get(FileSystemConnectorOptions.SINK_PARTITION_COMMIT_POLICY_CLASS));
+ builder.setSuccessFileName(
+
conf.get(FileSystemConnectorOptions.SINK_PARTITION_COMMIT_SUCCESS_FILE_NAME));
Review Comment:
Please only options of `HiveOptions` in the Hive connector. Otherwise, it's
error-prone to use `FileSystemConnectorOptions`, e.g., unexpected default
value. You can reuse the options by referring the definition from
`FileSystemConnectorOptions`, for example, in `HiveOptions.java`:
```java
public static final ConfigOption<String> SINK_PARTITION_COMMIT_POLICY_CLASS =
FileSystemConnectorOptions.SINK_PARTITION_COMMIT_POLICY_CLASS;
public static final ConfigOption<String>
SINK_PARTITION_COMMIT_SUCCESS_FILE_NAME =
FileSystemConnectorOptions.SINK_PARTITION_COMMIT_SUCCESS_FILE_NAME;
```
##########
flink-connectors/flink-connector-files/src/main/java/org/apache/flink/connector/file/table/FileSystemCommitter.java:
##########
@@ -58,7 +59,9 @@ class FileSystemCommitter implements Serializable {
private final boolean isToLocal;
private final Path tmpPath;
private final int partitionColumnSize;
+ private final ObjectIdentifier identifier;
private final LinkedHashMap<String, String> staticPartitions;
+ private final List<PartitionCommitPolicy> policies;
Review Comment:
`PartitionCommitPolicy` is not serializable, but `FileSystemCommitter`
implements `Serializable`. I checked that `FileSystemCommitter` is only used as
a local variable. Therefore, `FileSystemCommitter` doesn't need to implement
the `Serializable` interface.
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