com.sleepycat.db
Class CursorConfig

java.lang.Object
  com.sleepycat.db.CursorConfig

All Implemented Interfaces:

Cloneable

public class CursorConfig

extends Object

implements Cloneable

Specify the attributes of database cursor. An instance created with the default constructor is initialized with the system's default settings.

Field Summary

static CursorConfig	DEFAULT Default configuration used if null is passed to methods that create a cursor.
static CursorConfig	DEGREE_2 A convenience instance to configure a cursor for degree 2 isolation.
static CursorConfig	DIRTY_READ A convenience instance to configure read operations performed by the cursor to return modified but not yet committed data.
static CursorConfig	WRITECURSOR A convenience instance to specify the Concurrent Data Store environment cursor will be used to update the database.

Constructor Summary

CursorConfig()
An instance created using the default constructor is initialized with the system's default settings.

Method Summary

boolean	getDegree2() Return if the cursor is configured for degree 2 isolation.
boolean	getDirtyRead() Return if read operations performed by the cursor are configured to return modified but not yet committed data.
boolean	getWriteCursor() Return if the Concurrent Data Store environment cursor will be used to update the database.
void	setDegree2(boolean degree2) Configure the cursor for degree 2 isolation.
void	setDirtyRead(boolean dirtyRead) Configure read operations performed by the cursor to return modified but not yet committed data.
void	setWriteCursor(boolean writeCursor) Specify the Concurrent Data Store environment cursor will be used to update the database.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT

public static final CursorConfig DEFAULT

Default configuration used if null is passed to methods that create a cursor.

DIRTY_READ

public static final CursorConfig DIRTY_READ

A convenience instance to configure read operations performed by the cursor to return modified but not yet committed data.

DEGREE_2

public static final CursorConfig DEGREE_2

A convenience instance to configure a cursor for degree 2 isolation.

This ensures the stability of the current data item read by this cursor but permits data read by this cursor to be modified or deleted prior to the commit of the transaction for this cursor.

WRITECURSOR

public static final CursorConfig WRITECURSOR

A convenience instance to specify the Concurrent Data Store environment cursor will be used to update the database.

The underlying Berkeley DB database environment must have been configured as a Concurrent Data Store environment.

Constructor Detail

CursorConfig

public CursorConfig()

An instance created using the default constructor is initialized with the system's default settings.

Method Detail

setDirtyRead

public void setDirtyRead(boolean dirtyRead)

Configure read operations performed by the cursor to return modified but not yet committed data.

Parameters:

dirtyRead - If true, configure read operations performed by the cursor to return modified but not yet committed data.

getDirtyRead

public boolean getDirtyRead()

Return if read operations performed by the cursor are configured to return modified but not yet committed data.

Returns:

If read operations performed by the cursor are configured to return modified but not yet committed data.

setDegree2

public void setDegree2(boolean degree2)

Configure the cursor for degree 2 isolation.

This ensures the stability of the current data item read by this cursor but permits data read by this cursor to be modified or deleted prior to the commit of the transaction for this cursor.

Parameters:

degree2 - If true, configure the cursor for degree 2 isolation.

getDegree2

public boolean getDegree2()

Return if the cursor is configured for degree 2 isolation.

Returns:

If the cursor is configured for degree 2 isolation.

setWriteCursor

public void setWriteCursor(boolean writeCursor)

Specify the Concurrent Data Store environment cursor will be used to update the database.

Parameters:

writeCursor - If true, specify the Concurrent Data Store environment cursor will be used to update the database.

getWriteCursor

public boolean getWriteCursor()

Return if the Concurrent Data Store environment cursor will be used to update the database.

Returns:

If the Concurrent Data Store environment cursor will be used to update the database.