Package io.camunda.zeebe.snapshots.impl

Class FileBasedSnapshotChunkReader

java.lang.Object

io.camunda.zeebe.snapshots.impl.FileBasedSnapshotChunkReader

All Implemented Interfaces:

SnapshotChunkReader, CloseableSilently, AutoCloseable, Iterator<SnapshotChunk>

public final class FileBasedSnapshotChunkReader
extends Object
implements SnapshotChunkReader

Implements a chunk reader where each chunk is a single file in a root directory. Chunks are then ordered lexicographically, and the files are assumed to be immutable, i.e. no more are added to the directory once this is created.

Constructor Summary

Constructors

Constructor	Description
FileBasedSnapshotChunkReader(Path directory)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasNext()
SnapshotChunk	next()
ByteBuffer	nextId()	Returns the next chunk ID; if Iterator.hasNext() should return false, then this will return null.
void	reset()
void	seek(ByteBuffer id)	Skips all chunks up to the one with the given ID, inclusively, such that the next chunk would be the chunk right after it (if any).
void	setMaximumChunkSize(int maximumChunkSize)	Sets the maximum chunk size for the reader when sending files.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Details

FileBasedSnapshotChunkReader

public FileBasedSnapshotChunkReader(Path directory)
                             throws IOException

Throws:

IOException

Method Details

reset

public void reset()

Specified by:

reset in interface SnapshotChunkReader

seek

public void seek(ByteBuffer id)

Description copied from interface: SnapshotChunkReader

Skips all chunks up to the one with the given ID, inclusively, such that the next chunk would be the chunk right after it (if any). If no ID is given then should not do anything.

Specified by:

seek in interface SnapshotChunkReader

Parameters:

id - the chunk ID to seek to; maybe null

nextId

public ByteBuffer nextId()

Description copied from interface: SnapshotChunkReader

Returns the next chunk ID; if Iterator.hasNext() should return false, then this will return null.

Specified by:

nextId in interface SnapshotChunkReader

Returns:

the next chunk ID

setMaximumChunkSize

public void setMaximumChunkSize(int maximumChunkSize)

Description copied from interface: SnapshotChunkReader

Sets the maximum chunk size for the reader when sending files.

Specified by:

setMaximumChunkSize in interface SnapshotChunkReader

Parameters:

maximumChunkSize -

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableSilently

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<SnapshotChunk>

next

public SnapshotChunk next()

Specified by:

next in interface Iterator<SnapshotChunk>