Package io.debezium.relational

Class SystemVariables

java.lang.Object

io.debezium.relational.SystemVariables

public class SystemVariables
extends Object

Encapsulates a set of a database's system variables.

Author:

Randall Hauch

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SystemVariables.DefaultScope
static interface	SystemVariables.Scope	Interface that is used for enums defining the customized scope values for specific DBMSs.

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<SystemVariables.Scope,ConcurrentMap<String,String>>	systemVariables

Constructor Summary

Constructors

Constructor	Description
SystemVariables()	Create an instance.
SystemVariables(SystemVariables.Scope[] scopes)
SystemVariables(List<SystemVariables.Scope> scopes)

Method Summary

Modifier and Type	Method	Description
protected ConcurrentMap<String,String>	forScope(SystemVariables.Scope scope)
private List<ConcurrentMap<String,String>>	getOrderedSystemVariablesByScopePriority()
String	getVariable(String name)	Get the variable with the specified name, from the highest priority scope that contain it.
String	getVariable(String name, SystemVariables.Scope scope)	Get the variable with the specified name and scope.
SystemVariables	setVariable(SystemVariables.Scope scope, String name, String value)	Set the variable with the specified scope.
private String	variableName(String name)

Methods inherited from class java.lang.Object

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

Field Details

systemVariables

private final Map<SystemVariables.Scope,ConcurrentMap<String,String>> systemVariables

Constructor Details

SystemVariables

public SystemVariables()

Create an instance.

SystemVariables

public SystemVariables(SystemVariables.Scope[] scopes)

SystemVariables

public SystemVariables(List<SystemVariables.Scope> scopes)

Method Details

setVariable

public SystemVariables setVariable(SystemVariables.Scope scope,
 String name,
 String value)

Set the variable with the specified scope.

Parameters:

scope - the variable scope; may be null if the session scope is to be used

name - the name of the variable; may not be null

value - the variable value; may be null if the value for the named variable is to be removed

Returns:

this object for method chaining purposes; never null

getVariable

public String getVariable(String name,
 SystemVariables.Scope scope)

Get the variable with the specified name and scope.

Parameters:

name - the name of the variable; may not be null

scope - the variable scope; may not be null

Returns:

the variable value; may be null if the variable is not currently set

getVariable

public String getVariable(String name)

Get the variable with the specified name, from the highest priority scope that contain it.

Parameters:

name - the name of the variable; may not be null

Returns:

the variable value; may be null if the variable is not currently set

getOrderedSystemVariablesByScopePriority

private List<ConcurrentMap<String,String>> getOrderedSystemVariablesByScopePriority()

variableName

private String variableName(String name)

forScope

protected ConcurrentMap<String,String> forScope(SystemVariables.Scope scope)