PersistenceSettings (Ignite 2.7.2)

java.lang.Object
- org.apache.ignite.cache.store.cassandra.persistence.PersistenceSettings

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

KeyPersistenceSettings, ValuePersistenceSettings
```
public abstract class PersistenceSettings
extends Object
implements Serializable
```
Stores persistence settings, which describes how particular key/value from Ignite cache should be stored in Cassandra.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor and Description

PersistenceSettings(Element el)
Constructs persistence settings from corresponding XML element.

Constructors
Constructor and Description
`PersistenceSettings(Element el)` Constructs persistence settings from corresponding XML element.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`List<PojoField>`	`cassandraUniqueFields()` List of POJO fields having unique mapping to Cassandra columns - skipping aliases pointing to the same Cassandra table column.
`protected void`	`checkDuplicates(List<PojoField> fields)` Checks if there are POJO filed with the same name or same Cassandra column specified in persistence settings.
`protected abstract PojoField`	`createPojoField(Element el, Class clazz)` Creates instance of `PojoField` based on it's description in XML element.
`protected abstract PojoField`	`createPojoField(PojoFieldAccessor accessor)` Creates instance of `PojoField` from its field accessor.
`protected abstract String`	`defaultColumnName()` Returns default name for Cassandra column (if it's not specified explicitly).
`protected List<PojoField>`	`detectPojoFields(NodeList fieldNodes)` Extracts POJO fields from a list of corresponding XML field nodes.
`static PropertyDescriptor`	`findPropertyDescriptor(List<PropertyDescriptor> descriptors, String propName)` Extracts property descriptor from the descriptors list by its name.
`String`	`getColumn()` Returns Cassandra table column name where object should be persisted in case of using BLOB or PRIMITIVE persistence strategy.
`PojoField`	`getFieldByColumn(String column)` Returns POJO field by Cassandra table column name.
`abstract List<PojoField>`	`getFields()` Returns a list of POJO fields to be persisted.
`Class`	`getJavaClass()` Returns java class of the object to be persisted.
`Serializer`	`getSerializer()` Returns serializer to be used for BLOBs.
`PersistenceStrategy`	`getStrategy()` Returns persistence strategy to use.
`List<String>`	`getTableColumns()` Returns set of database column names, used to persist field values
`String`	`getTableColumnsDDL()` Returns Cassandra table columns DDL, corresponding to POJO fields which should be persisted.
`String`	`getTableColumnsDDL(Set<String> ignoreColumns)` Returns Cassandra table columns DDL, corresponding to POJO fields which should be persisted.
`protected void`	`init()` Class instance initialization.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PersistenceSettings
```
public PersistenceSettings(Element el)
```
    Constructs persistence settings from corresponding XML element.
    
    Parameters:
    
    el - xml element containing persistence settings configuration.
- Method Detail
  - findPropertyDescriptor
```
public static PropertyDescriptor findPropertyDescriptor(List<PropertyDescriptor> descriptors,
                                                        String propName)
```
    Extracts property descriptor from the descriptors list by its name.
    
    Parameters:
    
    descriptors - descriptors list.
    
    propName - property name.
    
    Returns:
    
    property descriptor.
  - getJavaClass
```
public Class getJavaClass()
```
    Returns java class of the object to be persisted.
    
    Returns:
    
    java class.
  - getStrategy
```
public PersistenceStrategy getStrategy()
```
    Returns persistence strategy to use.
    
    Returns:
    
    persistence strategy.
  - getColumn
```
public String getColumn()
```
    Returns Cassandra table column name where object should be persisted in case of using BLOB or PRIMITIVE persistence strategy.
    
    Returns:
    
    column name.
  - getSerializer
```
public Serializer getSerializer()
```
    Returns serializer to be used for BLOBs.
    
    Returns:
    
    serializer.
  - getFields
```
public abstract List<PojoField> getFields()
```
    Returns a list of POJO fields to be persisted.
    
    Returns:
    
    list of fields.
  - getFieldByColumn
```
public PojoField getFieldByColumn(String column)
```
    Returns POJO field by Cassandra table column name.
    
    Parameters:
    
    column - column name.
    
    Returns:
    
    POJO field or null if not exists.
  - cassandraUniqueFields
```
public List<PojoField> cassandraUniqueFields()
```
    List of POJO fields having unique mapping to Cassandra columns - skipping aliases pointing to the same Cassandra table column.
    
    Returns:
    
    List of fields.
  - getTableColumns
```
public List<String> getTableColumns()
```
    Returns set of database column names, used to persist field values
    
    Returns:
    
    set of database column names
  - getTableColumnsDDL
```
public String getTableColumnsDDL()
```
    Returns Cassandra table columns DDL, corresponding to POJO fields which should be persisted.
    
    Returns:
    
    DDL statement for Cassandra table fields.
  - getTableColumnsDDL
```
public String getTableColumnsDDL(Set<String> ignoreColumns)
```
    Returns Cassandra table columns DDL, corresponding to POJO fields which should be persisted.
    
    Parameters:
    
    ignoreColumns - Table columns to ignore (exclude) from DDL.
    
    Returns:
    
    DDL statement for Cassandra table fields.
  - defaultColumnName
```
protected abstract String defaultColumnName()
```
    Returns default name for Cassandra column (if it's not specified explicitly).
    
    Returns:
    
    column name
  - createPojoField
```
protected abstract PojoField createPojoField(Element el,
                                             Class clazz)
```
    Creates instance of PojoField based on it's description in XML element.
    
    Parameters:
    
    el - XML element describing POJO field
    
    clazz - POJO java class.
  - createPojoField
```
protected abstract PojoField createPojoField(PojoFieldAccessor accessor)
```
    Creates instance of PojoField from its field accessor.
    
    Parameters:
    
    accessor - field accessor.
  - init
```
protected void init()
```
    Class instance initialization.
  - checkDuplicates
```
protected void checkDuplicates(List<PojoField> fields)
```
    Checks if there are POJO filed with the same name or same Cassandra column specified in persistence settings.
    
    Parameters:
    
    fields - List of fields to be persisted into Cassandra.
  - detectPojoFields
```
protected List<PojoField> detectPojoFields(NodeList fieldNodes)
```
    Extracts POJO fields from a list of corresponding XML field nodes.
    
    Parameters:
    
    fieldNodes - Field nodes to process.
    
    Returns:
    
    POJO fields list.

Class PersistenceSettings

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

PersistenceSettings

Method Detail

findPropertyDescriptor

getJavaClass

getStrategy

getColumn

getSerializer

getFields

getFieldByColumn

cassandraUniqueFields

getTableColumns

getTableColumnsDDL

getTableColumnsDDL

defaultColumnName

createPojoField

createPojoField

init

checkDuplicates

detectPojoFields