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• org.apache.derby.io: Javadoc index of package org.apache.derby.io.


Package Samples:

• org.apache.derby.io

Classes:

• StorageFactory: This interface provides basic storage functions needed for read only databases. Most storage implementations will be read-write and implement the WritableStorageFactory extension of this interface. The database engine uses this interface to access storage. The normal database engine implements this interface using disk files and the standard java.io classes. The storage factory must implement writable temporary files, even if the database is read-only or if the storage factory is read-only (i.e. it does not implement the WritableStorageFactory extension of this interface). Temporary files are those ...
• StorageFile: This interface abstracts file naming. Any method in this interface that also appears in the java.io.File class should behave as the java.io.File method does. When used by the database engine all files will be under either the database directory, specified by the databaseName argument of the StorageFactory.init 55 method, or under the temporary file directory returned by the StorageFactory.getTempDir 55 method. All relative path names are relative to the database directory. The database engine will call this interface's methods from its own privilege blocks. Different threads may operate on the ...
• StorageRandomAccessFile: This interface abstracts an object that implements reading and writing on a random access file. It extends DataInput and DataOutput, so it implicitly contains all the methods of those interfaces. Any method in this interface that also appears in the java.io.RandomAccessFile class should behave as the java.io.RandomAccessFile method does. Each StorageRandomAccessFile has an associated file pointer, a byte offset in the file. All reading and writing takes place at the file pointer offset and advances it. An implementation of StorageRandomAccessFile need not be thread safe. The database engine single-threads ...
• WritableStorageFactory: This interface extends StorageFactory to provide read/write access to storage. The database engine will call this interface's methods from its own privilege blocks. Each WritableStorageFactory instance may be concurrently used by multiple threads.

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