org.apache.hadoop.hive.common.io

Interface FileMetadataCache

public interface FileMetadataCache

Method Summary

Modifier and Type	Method and Description
void	decRefBuffer(MemoryBufferOrBuffers buffer) Releases the buffer returned from getFileMetadata or putFileMetadata method.
MemoryBufferOrBuffers	getFileMetadata(Object fileKey)
MemoryBufferOrBuffers	putFileMetadata(Object fileKey, ByteBuffer tailBuffer) Deprecated.
MemoryBufferOrBuffers	putFileMetadata(Object fileKey, ByteBuffer tailBuffer, String tag)
MemoryBufferOrBuffers	putFileMetadata(Object fileKey, int length, InputStream is) Deprecated.
MemoryBufferOrBuffers	putFileMetadata(Object fileKey, int length, InputStream is, String tag) Puts the metadata for a given file (e.g.

Method Detail

getFileMetadata

MemoryBufferOrBuffers getFileMetadata(Object fileKey)

Returns:

Metadata for a given file (ORC or Parquet footer). The caller must decref this buffer when done.

putFileMetadata

@Deprecated
MemoryBufferOrBuffers putFileMetadata(Object fileKey,
                                                  int length,
                                                  InputStream is)
                                           throws IOException

Deprecated.

Throws:

IOException

putFileMetadata

@Deprecated
MemoryBufferOrBuffers putFileMetadata(Object fileKey,
                                                  ByteBuffer tailBuffer)

Deprecated.

decRefBuffer

void decRefBuffer(MemoryBufferOrBuffers buffer)

Releases the buffer returned from getFileMetadata or putFileMetadata method.

Parameters:

buffer - The buffer to release.

putFileMetadata

MemoryBufferOrBuffers putFileMetadata(Object fileKey,
                                      int length,
                                      InputStream is,
                                      String tag)
                               throws IOException

Puts the metadata for a given file (e.g. a footer buffer into cache).

Parameters:

fileKey - The file key.

length - The footer length.

is - The stream to read the footer from.

Returns:

The buffer or buffers representing the cached footer. The caller must decref this buffer when done.

Throws:

IOException

putFileMetadata

MemoryBufferOrBuffers putFileMetadata(Object fileKey,
                                      ByteBuffer tailBuffer,
                                      String tag)