public class RrdRandomAccessFileBackend extends RrdFileBackend
Modifier and Type | Field and Description |
---|---|
protected RandomAccessFile |
rafile
Random access file handle.
|
file, readOnly
Modifier | Constructor and Description |
---|---|
protected |
RrdRandomAccessFileBackend(String path,
boolean readOnly)
Creates RrdFileBackend object for the given file path, backed by RandomAccessFile object.
|
Modifier and Type | Method and Description |
---|---|
void |
close()
Closes the underlying RRD file.
|
protected void |
read(long offset,
byte[] b)
Reads a number of bytes from the RRD file on the disk
|
protected void |
setLength(long length)
Sets the number of bytes in the underlying RRD storage.
|
protected void |
write(long offset,
byte[] b)
Writes bytes to the underlying RRD file on the disk
|
getCanonicalPath, getCanonicalPath, getLength
getPath, isCachingAllowed, readAll
protected final RandomAccessFile rafile
protected RrdRandomAccessFileBackend(String path, boolean readOnly) throws IOException
path
- Path to a filereadOnly
- True, if file should be open in a read-only mode. False otherwiseIOException
- Thrown in case of I/O errorpublic void close() throws IOException
close
in class RrdFileBackend
IOException
- Thrown in case of I/O errorprotected void write(long offset, byte[] b) throws IOException
write
in class RrdBackend
offset
- Starting file offsetb
- Bytes to be written.IOException
- Thrown in case of I/O errorprotected void read(long offset, byte[] b) throws IOException
read
in class RrdBackend
offset
- Starting file offsetb
- Buffer which receives bytes read from the file.IOException
- Thrown in case of I/O error.protected void setLength(long length) throws IOException
setLength
in class RrdBackend
length
- Length of the underlying RRD storage in bytes.IOException
- Thrown in case of I/O error.Copyright © 2015. All rights reserved.