org.apache.nifi.lookup.db

Class SimpleDatabaseLookupService

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.controller.AbstractControllerService

org.apache.nifi.lookup.db.AbstractDatabaseLookupService

org.apache.nifi.lookup.db.SimpleDatabaseLookupService

All Implemented Interfaces:

ConfigurableComponent, ControllerService, LookupService<String>, StringLookupService

@Tags(value={"lookup","cache","enrich","join","rdbms","database","reloadable","key","value"})
 @CapabilityDescription(value="A relational-database-based lookup service. When the lookup key is found in the database, the specified lookup value column is returned. Only one value will be returned for each lookup, duplicate database entries are ignored.")
public class SimpleDatabaseLookupService
extends AbstractDatabaseLookupService
implements StringLookupService

Field Summary

Fields

Modifier and Type	Field and Description
private com.github.benmanes.caffeine.cache.Cache<Tuple<String,Object>,String>	cache
(package private) static PropertyDescriptor	LOOKUP_VALUE_COLUMN

Fields inherited from class org.apache.nifi.lookup.db.AbstractDatabaseLookupService

CACHE_EXPIRATION, CACHE_SIZE, CLEAR_CACHE_ON_ENABLED, DBCP_SERVICE, dbcpService, KEY, LOOKUP_KEY_COLUMN, lookupKeyColumn, properties, REQUIRED_KEYS, TABLE_NAME

Constructor Summary

Constructors

Constructor and Description
SimpleDatabaseLookupService()

Method Summary

Modifier and Type	Method and Description
Set<String>	getRequiredKeys()
protected void	init(ControllerServiceInitializationContext context)
Optional<String>	lookup(Map<String,Object> coordinates)
Optional<String>	lookup(Map<String,Object> coordinates, Map<String,String> context)
void	onEnabled(ConfigurationContext context)

Methods inherited from class org.apache.nifi.lookup.db.AbstractDatabaseLookupService

getSupportedPropertyDescriptors

Methods inherited from class org.apache.nifi.controller.AbstractControllerService

abstractClearConfigContext, abstractStoreConfigContext, disabled, enabled, getConfigurationContext, getControllerServiceLookup, getIdentifier, getLogger, getNodeTypeProvider, getProperty, getStateManager, initialize, isEnabled

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.lookup.StringLookupService

getValueType

Methods inherited from interface org.apache.nifi.controller.ControllerService

initialize, isStateful

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

getIdentifier, getPropertyDescriptor, getPropertyDescriptors, onPropertyModified, validate

Field Detail

cache

private volatile com.github.benmanes.caffeine.cache.Cache<Tuple<String,Object>,String> cache

LOOKUP_VALUE_COLUMN

static final PropertyDescriptor LOOKUP_VALUE_COLUMN

Constructor Detail

SimpleDatabaseLookupService

public SimpleDatabaseLookupService()

Method Detail

init

protected void init(ControllerServiceInitializationContext context)

Overrides:

init in class AbstractControllerService

onEnabled

@OnEnabled
public void onEnabled(ConfigurationContext context)

lookup

public Optional<String> lookup(Map<String,Object> coordinates)
                        throws LookupFailureException

Specified by:

lookup in interface LookupService<String>

Throws:

LookupFailureException

lookup

public Optional<String> lookup(Map<String,Object> coordinates,
                               Map<String,String> context)
                        throws LookupFailureException

Specified by:

lookup in interface LookupService<String>

Throws:

LookupFailureException

getRequiredKeys

public Set<String> getRequiredKeys()

Specified by:

getRequiredKeys in interface LookupService<String>