org.apache.nifi.parameter

Class DatabaseParameterProvider

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.parameter.AbstractParameterProvider

org.apache.nifi.parameter.DatabaseParameterProvider

All Implemented Interfaces:

ConfigurableComponent, ParameterProvider, VerifiableParameterProvider

@Tags(value={"database","dbcp","sql"})
 @CapabilityDescription(value="Fetches parameters from database tables")
public class DatabaseParameterProvider
extends AbstractParameterProvider
implements VerifiableParameterProvider

Field Summary

Fields

Modifier and Type	Field and Description
static PropertyDescriptor	DB_TYPE
protected static Map<String,DatabaseAdapter>	dbAdapters
static PropertyDescriptor	DBCP_SERVICE
(package private) static AllowableValue	GROUPING_BY_COLUMN
(package private) static AllowableValue	GROUPING_BY_TABLE_NAME
static PropertyDescriptor	PARAMETER_GROUP_NAME_COLUMN
static PropertyDescriptor	PARAMETER_GROUPING_STRATEGY
static PropertyDescriptor	PARAMETER_NAME_COLUMN
static PropertyDescriptor	PARAMETER_VALUE_COLUMN
private List<PropertyDescriptor>	properties
static PropertyDescriptor	SQL_WHERE_CLAUSE
static PropertyDescriptor	TABLE_NAME
static PropertyDescriptor	TABLE_NAMES

Constructor Summary

Constructors

Constructor and Description
DatabaseParameterProvider()

Method Summary

Modifier and Type	Method and Description
List<ParameterGroup>	fetchParameters(ConfigurationContext context)
(package private) String	getQuery(ConfigurationContext context, String tableName, List<String> columns, String whereClause)
protected List<PropertyDescriptor>	getSupportedPropertyDescriptors()
protected void	init(ParameterProviderInitializationContext config)
private void	validateValueNotNull(String value, String columnName)
List<ConfigVerificationResult>	verify(ConfigurationContext context, ComponentLog verificationLogger)

Methods inherited from class org.apache.nifi.parameter.AbstractParameterProvider

getIdentifier, getLogger, getName, getNodeTypeProvider, initialize

Methods inherited from class org.apache.nifi.components.AbstractConfigurableComponent

customValidate, equals, getPropertyDescriptor, getPropertyDescriptors, getSupportedDynamicPropertyDescriptor, hashCode, onPropertyModified, toString, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.nifi.components.ConfigurableComponent

getPropertyDescriptor, getPropertyDescriptors, onPropertyModified, validate

Field Detail

dbAdapters

protected static final Map<String,DatabaseAdapter> dbAdapters

DB_TYPE

public static final PropertyDescriptor DB_TYPE

GROUPING_BY_COLUMN

static AllowableValue GROUPING_BY_COLUMN

GROUPING_BY_TABLE_NAME

static AllowableValue GROUPING_BY_TABLE_NAME

DBCP_SERVICE

public static final PropertyDescriptor DBCP_SERVICE

PARAMETER_GROUPING_STRATEGY

public static final PropertyDescriptor PARAMETER_GROUPING_STRATEGY

TABLE_NAMES

public static final PropertyDescriptor TABLE_NAMES

TABLE_NAME

public static final PropertyDescriptor TABLE_NAME

PARAMETER_NAME_COLUMN

public static final PropertyDescriptor PARAMETER_NAME_COLUMN

PARAMETER_VALUE_COLUMN

public static final PropertyDescriptor PARAMETER_VALUE_COLUMN

PARAMETER_GROUP_NAME_COLUMN

public static final PropertyDescriptor PARAMETER_GROUP_NAME_COLUMN

SQL_WHERE_CLAUSE

public static final PropertyDescriptor SQL_WHERE_CLAUSE

properties

private List<PropertyDescriptor> properties

Constructor Detail

DatabaseParameterProvider

public DatabaseParameterProvider()

Method Detail

init

protected void init(ParameterProviderInitializationContext config)

Overrides:

init in class AbstractParameterProvider

getSupportedPropertyDescriptors

protected List<PropertyDescriptor> getSupportedPropertyDescriptors()

Overrides:

getSupportedPropertyDescriptors in class AbstractConfigurableComponent

fetchParameters

public List<ParameterGroup> fetchParameters(ConfigurationContext context)

Specified by:

fetchParameters in interface ParameterProvider

validateValueNotNull

private void validateValueNotNull(String value,
                                  String columnName)

getQuery

String getQuery(ConfigurationContext context,
                String tableName,
                List<String> columns,
                String whereClause)

verify

public List<ConfigVerificationResult> verify(ConfigurationContext context,
                                             ComponentLog verificationLogger)

Specified by:

verify in interface VerifiableParameterProvider