uk.ac.starlink.table.storage
Class DiskRowStore
java.lang.Object
uk.ac.starlink.table.storage.ByteStoreRowStore
uk.ac.starlink.table.storage.DiskRowStore
- All Implemented Interfaces:
- RowStore, TableSink
- public class DiskRowStore
- extends ByteStoreRowStore
Implementation of RowStore which stores data on disk.
The temporary file is deleted by the finalizer (if it runs) or failing
that at JVM exit. Since there's no guarantee when or if the finalizer
will run even after this object is a candidate for garbage collection,
this does raise the possibility that large numbers of potentially large
temporary files will accumulate during JVM operation.
It depends on your GC.
- Since:
- 3 Aug 2004
Constructor Summary |
DiskRowStore()
Constructs a new DiskRowStore which uses a temporary file as
backing store. |
DiskRowStore(File file)
Constructs a new DiskRowStore which uses the given file as a
backing store. |
DiskRowStore
public DiskRowStore(File file)
throws IOException
- Constructs a new DiskRowStore which uses the given file as a
backing store. Nothing is done to mark this file as temporary.
Since the storage format is not public, specifying the file like
this isn't very useful except for test purposes.
- Parameters:
file
- location of the backing file which will be used
- Throws:
IOException
- if there is some I/O-related problem with
opening the file
SecurityException
- if the current security context does not
allow writing to a temporary file
DiskRowStore
public DiskRowStore()
throws IOException
- Constructs a new DiskRowStore which uses a temporary file as
backing store.
The temporary file will be written to the default temporary
directory, given by the value of the java.io.tmpdir
system property.
- Throws:
IOException
- if there is some I/O-related problem with
opening the file
SecurityException
- if the current security context does not
allow writing to a temporary file