org.apache.jackrabbit.core.fs.db

Class OracleFileSystem

java.lang.Object

org.apache.jackrabbit.core.fs.db.DatabaseFileSystem

org.apache.jackrabbit.core.fs.db.DbFileSystem

org.apache.jackrabbit.core.fs.db.OracleFileSystem

All Implemented Interfaces:

FileSystem, DatabaseAware

Direct Known Subclasses:

Oracle9FileSystem

public class OracleFileSystem
extends DbFileSystem

OracleFileSystem is a JDBC-based FileSystem implementation for Jackrabbit that persists file system entries in an Oracle database.

It is configured through the following properties:

• driver: the FQN name of the JDBC driver class (default: "oracle.jdbc.OracleDriver")
• schema: type of schema to be used (default: "oracle")
• url: the database url (e.g. "jdbc:oracle:thin:@[host]:[port]:[sid]")
• user: the database user
• password: the user's password
• schemaObjectPrefix: prefix to be prepended to schema objects
• tablespace: the tablespace to use for tables (also used for indexes if indexTablespace is omitted)
• indexTablespace: the tablespace to use for indexes

See also DbFileSystem.

The following is a fragment from a sample configuration:

   <FileSystem class="org.apache.jackrabbit.core.fs.db.OracleFileSystem">
       <param name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"/>
       <param name="user" value="scott"/>
       <param name="password" value="tiger"/>
       <param name="schemaObjectPrefix" value="rep_"/>
       <param name="tablespace" value="user"/>
       <param name="indexTablespace" value="user"/>
  </FileSystem>
 

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	DEFAULT_TABLESPACE_CLAUSE The default tablespace clause used when tablespace or indexTablespace are not specified.
protected static String	INDEX_TABLESPACE_VARIABLE Name of the replacement variable in the DDL for indexTablespace.
protected String	indexTablespace The Oracle tablespace to use for indexes
protected String	tablespace The Oracle tablespace to use for tables
protected static String	TABLESPACE_VARIABLE Name of the replacement variable in the DDL for tablespace.

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 and Description
OracleFileSystem() Creates a new OracleFileSystem instance.

Method Summary

Modifier and Type	Method and Description
protected void	buildSQLStatements() Builds the SQL statements
protected CheckSchemaOperation	createCheckSchemaOperation() This method is called from DatabaseFileSystem.init() after the DatabaseFileSystem.createConnectionHelper(DataSource) method, and returns a default CheckSchemaOperation.
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.
String	getIndexTablespace() Returns the configured Oracle tablespace for indexes.
String	getTablespace() Returns the configured Oracle tablespace for tables.
void	setIndexTablespace(String tablespaceName) Sets the Oracle tablespace for indexes.
void	setTablespace(String tablespaceName) Sets the Oracle tablespace for tables.

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

close, 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

DEFAULT_TABLESPACE_CLAUSE

protected static final String DEFAULT_TABLESPACE_CLAUSE

The default tablespace clause used when tablespace or indexTablespace are not specified.

See Also:

Constant Field Values

TABLESPACE_VARIABLE

protected static final String TABLESPACE_VARIABLE

Name of the replacement variable in the DDL for tablespace.

See Also:

Constant Field Values

INDEX_TABLESPACE_VARIABLE

protected static final String INDEX_TABLESPACE_VARIABLE

Name of the replacement variable in the DDL for indexTablespace.

See Also:

Constant Field Values

tablespace

protected String tablespace

The Oracle tablespace to use for tables

indexTablespace

protected String indexTablespace

The Oracle tablespace to use for indexes

Constructor Detail

OracleFileSystem

public OracleFileSystem()

Creates a new OracleFileSystem instance.

Method Detail

getTablespace

public String getTablespace()

Returns the configured Oracle tablespace for tables.

Returns:

the configured Oracle tablespace for tables.

setTablespace

public void setTablespace(String tablespaceName)

Sets the Oracle tablespace for tables.

Parameters:

tablespaceName - the Oracle tablespace for tables.

getIndexTablespace

public String getIndexTablespace()

Returns the configured Oracle tablespace for indexes.

Returns:

the configured Oracle tablespace for indexes.

setIndexTablespace

public void setIndexTablespace(String tablespaceName)

Sets the Oracle tablespace for indexes.

Parameters:

tablespaceName - the Oracle tablespace for indexes.

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

createCheckSchemaOperation

protected CheckSchemaOperation createCheckSchemaOperation()

This method is called from DatabaseFileSystem.init() after the DatabaseFileSystem.createConnectionHelper(DataSource) method, and returns a default CheckSchemaOperation. Subclasses can overrride this implementation to get a customized implementation.

Overrides:

createCheckSchemaOperation in class DatabaseFileSystem

Returns:

a new CheckSchemaOperation instance

buildSQLStatements

protected void buildSQLStatements()

Builds the SQL statements

Since Oracle treats emtpy strings and BLOBs as null values the SQL statements had to be adapated accordingly. The following changes were necessary:

• The distinction between file and folder entries is based on FSENTRY_LENGTH being null/not null rather than FSENTRY_DATA being null/not null because FSENTRY_DATA of a 0-length (i.e. empty) file is null in Oracle.
• Folder entries: Since the root folder has an empty name (which would be null in Oracle), an empty name is automatically converted and treated as " ".

Overrides:

buildSQLStatements in class DatabaseFileSystem