Package io.debezium.connector.sqlserver

Enum SqlServerConnectorConfig.SnapshotIsolationMode

java.lang.Object

java.lang.Enum<SqlServerConnectorConfig.SnapshotIsolationMode>

io.debezium.connector.sqlserver.SqlServerConnectorConfig.SnapshotIsolationMode

All Implemented Interfaces:

EnumeratedValue, Serializable, Comparable<SqlServerConnectorConfig.SnapshotIsolationMode>

Enclosing class:

SqlServerConnectorConfig

public static enum SqlServerConnectorConfig.SnapshotIsolationMode
extends Enum<SqlServerConnectorConfig.SnapshotIsolationMode>
implements EnumeratedValue

The set of predefined snapshot isolation mode options.

Enum Constant Summary

Enum Constants

Enum Constant	Description
EXCLUSIVE	This mode will block all reads and writes for the entire duration of the snapshot.
READ_COMMITTED	This mode uses READ COMMITTED isolation level.
READ_UNCOMMITTED	This mode uses READ UNCOMMITTED isolation level.
REPEATABLE_READ	This mode uses REPEATABLE READ isolation level.
SNAPSHOT	This mode uses SNAPSHOT isolation level.

Field Summary

Fields

Modifier and Type	Field	Description
private String	value

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SnapshotIsolationMode(String value)

Method Summary

Modifier and Type	Method	Description
String	getValue()
static SqlServerConnectorConfig.SnapshotIsolationMode	parse(String value)	Determine if the supplied value is one of the predefined options.
static SqlServerConnectorConfig.SnapshotIsolationMode	parse(String value, String defaultValue)	Determine if the supplied value is one of the predefined options.
static SqlServerConnectorConfig.SnapshotIsolationMode	valueOf(String name)	Returns the enum constant of this type with the specified name.
static SqlServerConnectorConfig.SnapshotIsolationMode[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

EXCLUSIVE

public static final SqlServerConnectorConfig.SnapshotIsolationMode EXCLUSIVE

This mode will block all reads and writes for the entire duration of the snapshot. The connector will execute SELECT * FROM .. WITH (TABLOCKX)

SNAPSHOT

public static final SqlServerConnectorConfig.SnapshotIsolationMode SNAPSHOT

This mode uses SNAPSHOT isolation level. This way reads and writes are not blocked for the entire duration of the snapshot. Snapshot consistency is guaranteed as long as DDL statements are not executed at the time.

REPEATABLE_READ

public static final SqlServerConnectorConfig.SnapshotIsolationMode REPEATABLE_READ

This mode uses REPEATABLE READ isolation level. This mode will avoid taking any table locks during the snapshot process, except schema snapshot phase where exclusive table locks are acquired for a short period. Since phantom reads can occur, it does not fully guarantee consistency.

READ_COMMITTED

public static final SqlServerConnectorConfig.SnapshotIsolationMode READ_COMMITTED

This mode uses READ COMMITTED isolation level. This mode does not take any table locks during the snapshot process. In addition, it does not take any long-lasting row-level locks, like in repeatable read isolation level. Snapshot consistency is not guaranteed.

READ_UNCOMMITTED

public static final SqlServerConnectorConfig.SnapshotIsolationMode READ_UNCOMMITTED

This mode uses READ UNCOMMITTED isolation level. This mode takes neither table locks nor row-level locks during the snapshot process. This way other transactions are not affected by initial snapshot process. However, snapshot consistency is not guaranteed.

Field Detail

value

private final String value

Constructor Detail

SnapshotIsolationMode

private SnapshotIsolationMode(String value)

Method Detail

values

public static SqlServerConnectorConfig.SnapshotIsolationMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SqlServerConnectorConfig.SnapshotIsolationMode c : SqlServerConnectorConfig.SnapshotIsolationMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SqlServerConnectorConfig.SnapshotIsolationMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getValue

public String getValue()

Specified by:

getValue in interface EnumeratedValue

parse

public static SqlServerConnectorConfig.SnapshotIsolationMode parse(String value)

Determine if the supplied value is one of the predefined options.

Parameters:

value - the configuration property value; may not be null

Returns:

the matching option, or null if no match is found

parse

public static SqlServerConnectorConfig.SnapshotIsolationMode parse(String value,
                                                                   String defaultValue)

Determine if the supplied value is one of the predefined options.

Parameters:

value - the configuration property value; may not be null

defaultValue - the default value; may be null

Returns:

the matching option, or null if no match is found and the non-null default is invalid