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## com.sleepycat.persist
Class StoreConfig

    java.lang.Object
      com.sleepycat.persist.StoreConfig

All Implemented Interfaces:
  Cloneable

    public class StoreConfig

extends Object
implements Cloneable

Configuration properties used with an `EntityStore` or `RawStore`.

`StoreConfig` objects are thread-safe. Multiple threads may safely call the methods of a shared `StoreConfig` object.

See the package summary example for an example of using a `StoreConfig`.

Author:
  Mark Hayes

Field Summary
`static StoreConfig` | `DEFAULT` The default store configuration containing properties as if the configuration were constructed and not modified.

Constructor Summary
`StoreConfig()` Creates an entity store configuration object with default properties.

Method Summary
`StoreConfig` | `cloneConfig()` Returns a shallow copy of the configuration.
`boolean` | `getAllowCreate()` Returns whether creation of a new store is allowed.
`boolean` | `getDeferredWrite()` Returns the deferred-write configuration property.
`boolean` | `getExclusiveCreate()` Returns whether opening an existing store is prohibited.
`EntityModel` | `getModel()` Returns the entity model that defines entity classes and index keys.
`Mutations` | `getMutations()` Returns the configured mutations for performing lazy evolution of stored instances.
`boolean` | `getReadOnly()` Returns the read-only configuration property.
`boolean` | `getSecondaryBulkLoad()` Returns the bulk-load-secondaries configuration property.
`boolean` | `getTemporary()` Returns the temporary configuration property.
`boolean` | `getTransactional()` Returns the transactional configuration property.
`void` | `setAllowCreate(boolean allowCreate)` Specifies whether creation of a new store is allowed.
`void` | `setDeferredWrite(boolean deferredWrite)` Sets the deferred-write configuration property.
`void` | `setExclusiveCreate(boolean exclusiveCreate)` Specifies whether opening an existing store is prohibited.
`void` | `setModel(EntityModel model)` Sets the entity model that defines entity classes and index keys.
`void` | `setMutations(Mutations mutations)` Configures mutations for performing lazy evolution of stored instances.
`void` | `setReadOnly(boolean readOnly)` Sets the read-only configuration property.
`void` | `setSecondaryBulkLoad(boolean secondaryBulkLoad)` Sets the bulk-load-secondaries configuration property.
`void` | `setTemporary(boolean temporary)` Sets the temporary configuration property.
`void` | `setTransactional(boolean transactional)` Sets the transactional configuration property.

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

Field Detail

### DEFAULT

    public static final StoreConfig DEFAULT

  The default store configuration containing properties as if the configuration were constructed and not modified.

Constructor Detail

### StoreConfig

    public StoreConfig()

  Creates an entity store configuration object with default properties.

Method Detail

### cloneConfig

    public StoreConfig cloneConfig()

  Returns a shallow copy of the configuration.

### setAllowCreate

    public void setAllowCreate(boolean allowCreate)

  Specifies whether creation of a new store is allowed. By default this property is false.

  If this property is false and the internal store metadata database does not exist, `DatabaseException` will be thrown when the store is opened.

### getAllowCreate

    public boolean getAllowCreate()

  Returns whether creation of a new store is allowed.

### setExclusiveCreate

    public void setExclusiveCreate(boolean exclusiveCreate)

  Specifies whether opening an existing store is prohibited. By default this property is false.

  If this property is true and the internal store metadata database already exists, `DatabaseException` will be thrown when the store is opened.

### getExclusiveCreate

    public boolean getExclusiveCreate()

  Returns whether opening an existing store is prohibited.

### setTransactional

    public void setTransactional(boolean transactional)

  Sets the transactional configuration property. By default this property is false.

  This property is true to open all store indices for transactional access. True may not be specified if the environment is not also transactional.

### getTransactional

    public boolean getTransactional()

  Returns the transactional configuration property.

### setReadOnly

    public void setReadOnly(boolean readOnly)

  Sets the read-only configuration property. By default this property is false.

  This property is true to open all store indices for read-only access, or false to open them for read-write access. False may not be specified if the environment is read-only.

### getReadOnly

    public boolean getReadOnly()

  Returns the read-only configuration property.

### setDeferredWrite

    public void setDeferredWrite(boolean deferredWrite)

  Sets the deferred-write configuration property. By default this property is false.

  This property is true to open all store index databases for deferred-write access. True may not be specified if the store is transactional.

  Deferred write stores avoid disk I/O and are not guaranteed to be persistent until `EntityStore.sync()` or `Environment.sync()` is called or the store is closed normally. This mode is particularly geared toward stores that frequently modify and delete data records. See the Getting Started Guide, Database chapter for a full description of the mode.

  See Also:
    `setTransactional(boolean)`

### getDeferredWrite

    public boolean getDeferredWrite()

  Returns the deferred-write configuration property.

### setTemporary

    public void setTemporary(boolean temporary)

  Sets the temporary configuration property. By default this property is false.

  This property is true to open all store databases as temporary databases. True may not be specified if the store is transactional.

  Temporary stores avoid disk I/O and are not persistent -- they are deleted when the store is closed or after a crash. This mode is particularly geared toward in-memory stores. See the Getting Started Guide, Database chapter for a full description of the mode.

  See Also:
    `setTransactional(boolean)`

### getTemporary

    public boolean getTemporary()

  Returns the temporary configuration property.

### setSecondaryBulkLoad

    public void setSecondaryBulkLoad(boolean secondaryBulkLoad)

  Sets the bulk-load-secondaries configuration property. By default this property is false.

  This property is true to cause the initial creation of secondary indices to be performed as a bulk load. If this property is true and `EntityStore.getSecondaryIndex` has never been called for a secondary index, that secondary index will not be created or written as records are written to the primary index. In addition, if that secondary index defines a foreign key constraint, the constraint will not be enforced.

  The secondary index will be populated later when the {code getSecondaryIndex} method is called for the first time for that index, or when the store is closed and re-opened with this property set to false and the primary index is obtained. In either case, the secondary index is populated by reading through the entire primary index and adding records to the secondary index as needed. While populating the secondary, foreign key constraints will be enforced and an exception is thrown if a constraint is violated.

  When loading a primary index along with secondary indexes from a large input data set, configuring a bulk load of the secondary indexes is sometimes more performant than updating the secondary indexes each time the primary index is updated. The absence of foreign key constraints during the load also provides more flexibility.

### getSecondaryBulkLoad

    public boolean getSecondaryBulkLoad()

  Returns the bulk-load-secondaries configuration property.

### setModel

    public void setModel(EntityModel model)

  Sets the entity model that defines entity classes and index keys.

  If null is specified or this method is not called, an `AnnotationModel` instance is used by default.

### getModel

    public EntityModel getModel()

  Returns the entity model that defines entity classes and index keys.

### setMutations

    public void setMutations(Mutations mutations)

  Configures mutations for performing lazy evolution of stored instances. Existing mutations for this store are not cleared, so the mutations required are only those changes that have been made since the store was last opened. Some new mutations may override existing specifications, and some may be supplemental.

  If null is specified and the store already exists, the previously specified mutations are used. The mutations are stored persistently in serialized form.

  Mutations must be available to handle all changes to classes that are incompatible with the class definitions known to this store. See `Mutations` and `Class Evolution` for more information.

  If an incompatible class change has been made and mutations are not available for handling the change, `IncompatibleClassException` will be thrown when creating an `EntityStore`.

### getMutations

    public Mutations getMutations()

  Returns the configured mutations for performing lazy evolution of stored instances.

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