DerbyFileSystem (Apache Jackrabbit 2.21.26-beta API)

java.lang.Object
- org.apache.jackrabbit.core.fs.db.DatabaseFileSystem
- - org.apache.jackrabbit.core.fs.db.DbFileSystem
  - - org.apache.jackrabbit.core.fs.db.DerbyFileSystem

All Implemented Interfaces:

FileSystem, DatabaseAware
```
public class DerbyFileSystem
extends DbFileSystem
```
DerbyFileSystem is a JDBC-based FileSystem implementation for Jackrabbit that persists file system entries in an embedded Derby database.
It is configured through the following properties:
- url: the database url of the form "jdbc:derby:[db];[attributes]"
- schemaObjectPrefix: prefix to be prepended to schema objects
- driver: the FQN name of the JDBC driver class (default: "org.apache.derby.jdbc.EmbeddedDriver")
- schema: type of schema to be used (default: "derby")
- user: the database user (default: null)
- password: the user's password (default: null)
- shutdownOnClose: if true (the default) the database is shutdown when the last connection is closed; set this to false when using a standalone database
See also DbFileSystem.
The following is a fragment from a sample configuration:
```
   <FileSystem class="org.apache.jackrabbit.core.fs.db.DerbyFileSystem">
       <param name="url" value="jdbc:derby:${rep.home}/db;create=true"/>
       <param name="schemaObjectPrefix" value="rep_"/>
  </FileSystem>
 
```

Field Summary

Fields
Modifier and Type Field Description

protected boolean shutdownOnClose
Flag indicating whether this derby database should be shutdown on close.
- Fields inherited from class org.apache.jackrabbit.core.fs.db.DbFileSystem
  dataSourceName, driver, password, url, user
- Fields inherited from class org.apache.jackrabbit.core.fs.db.DatabaseFileSystem
  conHelper, copyFileSQL, copyFilesSQL, deleteFileSQL, deleteFolderSQL, INITIAL_BUFFER_SIZE, initialized, insertFileSQL, insertFolderSQL, schema, schemaObjectPrefix, selectChildCountSQL, selectDataSQL, selectExistSQL, selectFileAndFolderNamesSQL, selectFileExistSQL, selectFileNamesSQL, selectFolderExistSQL, selectFolderNamesSQL, selectLastModifiedSQL, selectLengthSQL, updateDataSQL, updateLastModifiedSQL
- Fields inherited from interface org.apache.jackrabbit.core.fs.FileSystem
  SEPARATOR, SEPARATOR_CHAR

Constructor Summary

Constructors
Constructor Description

DerbyFileSystem()
Creates a new DerbyFileSystem instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	Close the file system.
`protected ConnectionHelper`	`createConnectionHelper(DataSource dataSrc)`	This method is called from the `DatabaseFileSystem.init()` method of this class and returns a `ConnectionHelper` instance which is assigned to the `conHelper` field.
`boolean`	`getShutdownOnClose()`
`void`	`setShutdownOnClose(boolean shutdownOnClose)`

Methods inherited from class org.apache.jackrabbit.core.fs.db.DbFileSystem
equals, getDataSource, getDataSourceName, getDriver, getPassword, getUrl, getUser, hashCode, setConnectionFactory, setDataSourceName, setDriver, setPassword, setUrl, setUser

Methods inherited from class org.apache.jackrabbit.core.fs.db.DatabaseFileSystem
buildSQLStatements, createCheckSchemaOperation, createDeepFolder, createFolder, deleteFile, deleteFolder, exists, getInputStream, getOutputStream, getSchema, getSchemaObjectPrefix, hasChildren, init, isFile, isFolder, isSchemaCheckEnabled, lastModified, length, list, listFiles, listFolders, setSchema, setSchemaCheckEnabled, setSchemaObjectPrefix, verifyRootExists

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - shutdownOnClose
```
protected boolean shutdownOnClose
```
    Flag indicating whether this derby database should be shutdown on close.
- Constructor Detail
  - DerbyFileSystem
```
public DerbyFileSystem()
```
    Creates a new DerbyFileSystem instance.
- Method Detail
  - getShutdownOnClose
```
public boolean getShutdownOnClose()
```
  - setShutdownOnClose
```
public void setShutdownOnClose(boolean shutdownOnClose)
```
  - createConnectionHelper
```
protected ConnectionHelper createConnectionHelper(DataSource dataSrc)
                                           throws Exception
```
    This method is called from the DatabaseFileSystem.init() method of this class and returns a ConnectionHelper instance which is assigned to the conHelper field. Subclasses may override it to return a specialized connection helper.
    
    Overrides:
    
    createConnectionHelper in class DatabaseFileSystem
    
    Parameters:
    
    dataSrc - the DataSource of this persistence manager
    
    Returns:
    
    a ConnectionHelper
    
    Throws:
    
    Exception - on error
  - close
```
public void close()
           throws FileSystemException
```
    Close the file system. After calling this method, the file system is no longer accessible.
    
    Specified by:
    
    close in interface FileSystem
    
    Overrides:
    
    close in class DatabaseFileSystem
    
    Throws:
    
    FileSystemException