org.ff4j.cassandra.store

Class FeatureStoreCassandra

java.lang.Object

org.ff4j.store.AbstractFeatureStore

org.ff4j.cassandra.store.FeatureStoreCassandra

All Implemented Interfaces:

FF4jCassandraSchema, FeatureStore

public class FeatureStoreCassandra
extends AbstractFeatureStore
implements FF4jCassandraSchema

Implementation of FeatureStore to work with Cassandra Storage. Minimize the Number of Writes : Writes in Cassandra aren’t free, but they’re awfully cheap. Cassandra is optimized for high write throughput, and almost all writes are equally efficient [1]. If you can perform extra writes to improve the efficiency of your read queries, it’s almost always a good tradeoff. Reads tend to be more expensive and are much more difficult to tune. Minimize Data Duplication Denormalization and duplication of data is a fact of life with Cassandra. Don’t be afraid of it. Disk space is generally the cheapest resource (compared to CPU, memory, disk IOPs, or network), and Cassandra is architected around that fact. In order to get the most efficient reads, you often need to duplicate data.

Author:

Cedrick Lunven (@clunven)

Field Summary

Fields inherited from interface org.ff4j.cassandra.FF4jCassandraSchema

AUDIT_ATT_ACTION, AUDIT_ATT_CUSTOM, AUDIT_ATT_DURATION, AUDIT_ATT_HOSTNAME, AUDIT_ATT_NAME, AUDIT_ATT_SOURCE, AUDIT_ATT_TIME, AUDIT_ATT_TYPE, AUDIT_ATT_UID, AUDIT_ATT_USER, AUDIT_ATT_VALUE, AUDIT_HITCOUNT_TABLE, AUDIT_TABLE, DEFAULT_KEYSPACE, FEATURES_ATT_DESCRIPTION, FEATURES_ATT_ENABLED, FEATURES_ATT_GROUPNAME, FEATURES_ATT_PROPERTIES, FEATURES_ATT_ROLES, FEATURES_ATT_STRATEGY, FEATURES_ATT_UID, FEATURES_INDEX_GROUPNAME, FEATURES_TABLE, PROPERTIES_ATT_CLASS, PROPERTIES_ATT_DESCRIPTION, PROPERTIES_ATT_FIXEDVALUES, PROPERTIES_ATT_UID, PROPERTIES_ATT_VALUE, PROPERTIES_TABLE, STMT_AUDIT_INSERT, STMT_AUDIT_INSERT_HITCOUNT, STMT_AUDIT_READ_BY_ID, STMT_CREATE_INDEX_FEATUREGROUP, STMT_CREATE_TABLE_AUDIT, STMT_CREATE_TABLE_AUDITHITCOUNT, STMT_CREATE_TABLE_FEATURE, STMT_CREATE_TABLE_PROPERTY, STMT_CREATE_UDT_PROPERTY, STMT_CREATE_UDT_STRATEGY, STMT_FEATURE_ADDTOGROUP, STMT_FEATURE_DELETE, STMT_FEATURE_EXIST, STMT_FEATURE_INSERT, STMT_FEATURE_READ, STMT_FEATURE_READ_ALL, STMT_FEATURE_REMOVEGROUP, STMT_FEATURE_TOGGLE, STMT_FEATUREGROUP_LIST, STMT_FEATUREGROUP_READ, STMT_PROPERTY_DELETE, STMT_PROPERTY_EXIST, STMT_PROPERTY_INSERT, STMT_PROPERTY_LISTNAMES, STMT_PROPERTY_READ, STMT_PROPERTY_READ_ALL, UDT_PROPERTY, UDT_PROPERTY_CLASS, UDT_PROPERTY_DESCRIPTION, UDT_PROPERTY_FIXEDVALUES, UDT_PROPERTY_UID, UDT_PROPERTY_VALUE, UDT_STRATEGY, UDT_STRATEGY_CLASS, UDT_STRATEGY_PARAMS

Constructor Summary

Constructors

Constructor and Description
FeatureStoreCassandra() Default constructor.
FeatureStoreCassandra(com.datastax.oss.driver.api.core.CqlSession cqlSession) Connector with running session

Method Summary

Modifier and Type	Method and Description
void	addToGroup(String uid, String groupName)
void	clear()
void	create(Feature fp)
void	createSchema()
void	delete(String uid)
void	disable(String uid)
void	disableGroup(String groupName)
void	enable(String uid)
void	enableGroup(String groupName)
boolean	exist(String uid)
boolean	existGroup(String groupName)
void	grantRoleOnFeature(String uid, String roleName)
protected Feature	mapFeatureRow(com.datastax.oss.driver.api.core.cql.Row row)
protected void	prepareStatements() Prepared once, run many.
Feature	read(String uid)
Map<String,Feature>	readAll()
Set<String>	readAllGroups()
Map<String,Feature>	readGroup(String groupName)
void	removeFromGroup(String uid, String groupName)
void	removeRoleFromFeature(String uid, String roleName)
void	update(Feature fp)

Methods inherited from class org.ff4j.store.AbstractFeatureStore

assertFeatureExist, assertFeatureNotExist, assertFeatureNotNull, assertGroupExist, importFeatures, importFeaturesFromXmlFile, toJson, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ff4j.cassandra.FF4jCassandraSchema

dropTableIfExists, dropTypeIffExists, isTableExist, truncateTable

Constructor Detail

FeatureStoreCassandra

public FeatureStoreCassandra()

Default constructor.

FeatureStoreCassandra

public FeatureStoreCassandra(com.datastax.oss.driver.api.core.CqlSession cqlSession)

Connector with running session

Method Detail

createSchema

public void createSchema()

Specified by:

createSchema in interface FeatureStore

Overrides:

createSchema in class AbstractFeatureStore

exist

public boolean exist(String uid)

Specified by:

exist in interface FeatureStore

enable

public void enable(String uid)

Specified by:

enable in interface FeatureStore

Overrides:

enable in class AbstractFeatureStore

disable

public void disable(String uid)

Specified by:

disable in interface FeatureStore

Overrides:

disable in class AbstractFeatureStore

create

public void create(Feature fp)

Specified by:

create in interface FeatureStore

delete

public void delete(String uid)

Specified by:

delete in interface FeatureStore

read

public Feature read(String uid)

Specified by:

read in interface FeatureStore

readAll

public Map<String,Feature> readAll()

Specified by:

readAll in interface FeatureStore

update

public void update(Feature fp)

Specified by:

update in interface FeatureStore

grantRoleOnFeature

public void grantRoleOnFeature(String uid,
                               String roleName)

Specified by:

grantRoleOnFeature in interface FeatureStore

Overrides:

grantRoleOnFeature in class AbstractFeatureStore

removeRoleFromFeature

public void removeRoleFromFeature(String uid,
                                  String roleName)

Specified by:

removeRoleFromFeature in interface FeatureStore

Overrides:

removeRoleFromFeature in class AbstractFeatureStore

enableGroup

public void enableGroup(String groupName)

Specified by:

enableGroup in interface FeatureStore

Overrides:

enableGroup in class AbstractFeatureStore

disableGroup

public void disableGroup(String groupName)

Specified by:

disableGroup in interface FeatureStore

Overrides:

disableGroup in class AbstractFeatureStore

existGroup

public boolean existGroup(String groupName)

Specified by:

existGroup in interface FeatureStore

Overrides:

existGroup in class AbstractFeatureStore

readGroup

public Map<String,Feature> readGroup(String groupName)

Specified by:

readGroup in interface FeatureStore

Overrides:

readGroup in class AbstractFeatureStore

addToGroup

public void addToGroup(String uid,
                       String groupName)

Specified by:

addToGroup in interface FeatureStore

Overrides:

addToGroup in class AbstractFeatureStore

removeFromGroup

public void removeFromGroup(String uid,
                            String groupName)

Specified by:

removeFromGroup in interface FeatureStore

Overrides:

removeFromGroup in class AbstractFeatureStore

readAllGroups

public Set<String> readAllGroups()

Specified by:

readAllGroups in interface FeatureStore

Overrides:

readAllGroups in class AbstractFeatureStore

clear

public void clear()

Specified by:

clear in interface FeatureStore

prepareStatements

protected void prepareStatements()

Prepared once, run many.

mapFeatureRow

protected Feature mapFeatureRow(com.datastax.oss.driver.api.core.cql.Row row)