org.apache.nifi.controller.cassandra

Class CassandraDistributedMapCache

java.lang.Object

org.apache.nifi.components.AbstractConfigurableComponent

org.apache.nifi.controller.AbstractControllerService

org.apache.nifi.controller.cassandra.CassandraDistributedMapCache

All Implemented Interfaces:

ConfigurableComponent, ControllerService, DistributedMapCacheClient

@Tags(value={"map","cache","distributed","cassandra"})
 @CapabilityDescription(value="Provides a DistributedMapCache client that is based on Apache Cassandra.")
public class CassandraDistributedMapCache
extends AbstractControllerService
implements DistributedMapCacheClient

Field Summary

Fields

Modifier and Type	Field and Description
private com.datastax.driver.core.PreparedStatement	deleteStatement
static List<PropertyDescriptor>	DESCRIPTORS
private com.datastax.driver.core.PreparedStatement	existsStatement
private com.datastax.driver.core.PreparedStatement	fetchStatement
private com.datastax.driver.core.PreparedStatement	insertStatement
static PropertyDescriptor	KEY_FIELD_NAME
private String	keyField
private com.datastax.driver.core.Session	session
static PropertyDescriptor	SESSION_PROVIDER
private CassandraSessionProviderService	sessionProviderService
static PropertyDescriptor	TABLE_NAME
private String	tableName
private Long	ttl
static PropertyDescriptor	TTL
static PropertyDescriptor	VALUE_FIELD_NAME
private String	valueField

Constructor Summary

Constructors

Constructor and Description
CassandraDistributedMapCache()

Method Summary

Modifier and Type	Method and Description
void	close()
<K> boolean	containsKey(K k, Serializer<K> serializer)
<K,V> V	get(K k, Serializer<K> serializer, Deserializer<V> deserializer)
<K,V> V	getAndPutIfAbsent(K k, V v, Serializer<K> keySerializer, Serializer<V> valueSerializer, Deserializer<V> deserializer)
protected List<PropertyDescriptor>	getSupportedPropertyDescriptors()
void	onDisabled()
void	onEnabled(ConfigurationContext context)
<K,V> void	put(K k, V v, Serializer<K> keySerializer, Serializer<V> valueSerializer)
<K,V> boolean	putIfAbsent(K k, V v, Serializer<K> keySerializer, Serializer<V> valueSerializer)
<K> boolean	remove(K k, Serializer<K> serializer)
long	removeByPattern(String s)
private <K> byte[]	serializeKey(K k, Serializer<K> keySerializer)
private <V> byte[]	serializeValue(V v, Serializer<V> valueSerializer)

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

abstractClearConfigContext, abstractStoreConfigContext, disabled, enabled, getConfigurationContext, getControllerServiceLookup, getIdentifier, getLogger, getNodeTypeProvider, getProperty, getStateManager, init, 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.distributed.cache.client.DistributedMapCacheClient

keySet, putAll, removeAndGet, removeByPatternAndGet, subMap

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

SESSION_PROVIDER

public static final PropertyDescriptor SESSION_PROVIDER

TABLE_NAME

public static final PropertyDescriptor TABLE_NAME

KEY_FIELD_NAME

public static final PropertyDescriptor KEY_FIELD_NAME

VALUE_FIELD_NAME

public static final PropertyDescriptor VALUE_FIELD_NAME

TTL

public static final PropertyDescriptor TTL

DESCRIPTORS

public static final List<PropertyDescriptor> DESCRIPTORS

sessionProviderService

private CassandraSessionProviderService sessionProviderService

tableName

private String tableName

keyField

private String keyField

valueField

private String valueField

ttl

private Long ttl

session

private com.datastax.driver.core.Session session

deleteStatement

private com.datastax.driver.core.PreparedStatement deleteStatement

existsStatement

private com.datastax.driver.core.PreparedStatement existsStatement

fetchStatement

private com.datastax.driver.core.PreparedStatement fetchStatement

insertStatement

private com.datastax.driver.core.PreparedStatement insertStatement

Constructor Detail

CassandraDistributedMapCache

public CassandraDistributedMapCache()

Method Detail

getSupportedPropertyDescriptors

protected List<PropertyDescriptor> getSupportedPropertyDescriptors()

Overrides:

getSupportedPropertyDescriptors in class AbstractConfigurableComponent

onEnabled

@OnEnabled
public void onEnabled(ConfigurationContext context)

onDisabled

@OnDisabled
public void onDisabled()

putIfAbsent

public <K,V> boolean putIfAbsent(K k,
                                 V v,
                                 Serializer<K> keySerializer,
                                 Serializer<V> valueSerializer)
                          throws IOException

Specified by:

putIfAbsent in interface DistributedMapCacheClient

Throws:

IOException

getAndPutIfAbsent

public <K,V> V getAndPutIfAbsent(K k,
                                 V v,
                                 Serializer<K> keySerializer,
                                 Serializer<V> valueSerializer,
                                 Deserializer<V> deserializer)
                          throws IOException

Specified by:

getAndPutIfAbsent in interface DistributedMapCacheClient

Throws:

IOException

containsKey

public <K> boolean containsKey(K k,
                               Serializer<K> serializer)
                        throws IOException

Specified by:

containsKey in interface DistributedMapCacheClient

Throws:

IOException

put

public <K,V> void put(K k,
                      V v,
                      Serializer<K> keySerializer,
                      Serializer<V> valueSerializer)
               throws IOException

Specified by:

put in interface DistributedMapCacheClient

Throws:

IOException

get

public <K,V> V get(K k,
                   Serializer<K> serializer,
                   Deserializer<V> deserializer)
            throws IOException

Specified by:

get in interface DistributedMapCacheClient

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface DistributedMapCacheClient

Throws:

IOException

remove

public <K> boolean remove(K k,
                          Serializer<K> serializer)
                   throws IOException

Specified by:

remove in interface DistributedMapCacheClient

Throws:

IOException

removeByPattern

public long removeByPattern(String s)
                     throws IOException

Specified by:

removeByPattern in interface DistributedMapCacheClient

Throws:

IOException

serializeKey

private <K> byte[] serializeKey(K k,
                                Serializer<K> keySerializer)
                         throws IOException

Throws:

IOException

serializeValue

private <V> byte[] serializeValue(V v,
                                  Serializer<V> valueSerializer)
                           throws IOException

Throws:

IOException