fr.inria.atlanmod.neoemf.data.hbase.store

Class ReadOnlyHBaseStore

java.lang.Object

fr.inria.atlanmod.neoemf.data.store.AbstractPersistentStore

fr.inria.atlanmod.neoemf.data.store.AbstractDirectWriteStore<HBasePersistenceBackend>

fr.inria.atlanmod.neoemf.data.hbase.store.DirectWriteHBaseStore

fr.inria.atlanmod.neoemf.data.hbase.store.ReadOnlyHBaseStore

All Implemented Interfaces:

DirectWriteStore, PersistentStore, InternalEObject.EStore

public class ReadOnlyHBaseStore
extends DirectWriteHBaseStore

A DirectWriteHBaseStore that only allows read operations on the underlying database.

Read-only configuration allows to access model element faster, without checking value consistency between database calls. This store re-implements all the mutators and throws an UnsupportedOperationException when they are called, preventing resource corruption.

* This store can be used as a base store that can be complemented by plugging decorator stores on top of it (see AbstractPersistentStoreDecorator subclasses) to provide additional features such as caching or logging.

Field Summary

Fields inherited from class fr.inria.atlanmod.neoemf.data.hbase.store.DirectWriteHBaseStore

DEFAULT_CACHE_SIZE, PROPERTY_FAMILY, table

Fields inherited from class fr.inria.atlanmod.neoemf.data.store.AbstractDirectWriteStore

backend

Fields inherited from interface fr.inria.atlanmod.neoemf.data.store.PersistentStore

NO_INDEX

Constructor Summary

Constructors

Constructor and Description
ReadOnlyHBaseStore(Resource.Internal resource) Constructs a new ReadOnlyHBaseStore on the given resource.

Method Summary

Modifier and Type	Method and Description
void	add(InternalEObject internalObject, EStructuralFeature feature, int index, Object value) Adds the value at the index in the content of the object's feature.
void	clear(InternalEObject internalObject, EStructuralFeature feature) Removes all values form the content of the object's feature
protected Object	getFromTable(PersistentEObject object, EStructuralFeature feature) Gets the EStructuralFeature feature from the Table for the PersistentEObject object.
protected Table	initTable(Connection connection, TableName tableName, Admin admin) Checks that the provided tableName corresponds to an existing HBase table and opens it.
Object	move(InternalEObject internalObject, EStructuralFeature feature, int targetIndex, int sourceIndex) Moves the value at the source index in the content of the object's feature to the target index.
Object	remove(InternalEObject internalObject, EStructuralFeature feature, int index) Removes the value at the index in the content of the object's feature.
Object	set(InternalEObject internalObject, EStructuralFeature feature, int index, Object value) Sets the value at the index in the content of the object's feature.
void	unset(InternalEObject internalObject, EStructuralFeature feature) Unsets the feature of the object.
protected void	updateContainment(PersistentEObject object, EReference reference, PersistentEObject referencedObject) Add referencedObject in the reference containment list of object.
protected void	updateInstanceOf(PersistentEObject object) Computes object's metaclass information and persists them in the database.

Methods inherited from class fr.inria.atlanmod.neoemf.data.hbase.store.DirectWriteHBaseStore

addAttribute, addReference, contains, eObject, getAttribute, getContainer, getContainingFeature, getReference, indexOf, isSet, lastIndexOf, removeAttribute, removeReference, save, setAttribute, setReference, size

Methods inherited from class fr.inria.atlanmod.neoemf.data.store.AbstractDirectWriteStore

clearAttribute, clearReference, containsAttribute, containsReference, create, get, hashCode, indexOfAttribute, indexOfReference, isEmpty, isSetAttribute, isSetReference, lastIndexOfAttribute, lastIndexOfReference, parseProperty, resource, serializeToProperty, toArray, toArray, unsetAttribute, unsetReference

Methods inherited from class java.lang.Object

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

Methods inherited from interface fr.inria.atlanmod.neoemf.data.store.PersistentStore

getAllInstances

Constructor Detail

ReadOnlyHBaseStore

public ReadOnlyHBaseStore(Resource.Internal resource)
                   throws IOException

Constructs a new ReadOnlyHBaseStore on the given resource.

Parameters:

resource - the resource to persist and access

Throws:

IOException - if the HBase server cannot be found

Method Detail

initTable

protected Table initTable(Connection connection,
                          TableName tableName,
                          Admin admin)
                   throws IOException

Checks that the provided tableName corresponds to an existing HBase table and opens it.

Read-only mode is only available for existing databases.

Overrides:

initTable in class DirectWriteHBaseStore

Parameters:

connection - the connection to the HBase server

tableName - the name of the table to access on the server

admin - the administrator client of the HBase server

Returns:

the opened HBase table

Throws:

IOException - if the HBase server cannot be found or if tableName does not reference an existing table

updateContainment

protected void updateContainment(PersistentEObject object,
                                 EReference reference,
                                 PersistentEObject referencedObject)

Description copied from class: DirectWriteHBaseStore

Add referencedObject in the reference containment list of object. Inverse container feature between referencedObject and object is also updated.

Overrides:

updateContainment in class DirectWriteHBaseStore

Parameters:

object - the container element

reference - the containment EReference

referencedObject - the element to add to object's containment list

Throws:

UnsupportedOperationException - operation not supported in read-only mode

updateInstanceOf

protected void updateInstanceOf(PersistentEObject object)

Description copied from class: DirectWriteHBaseStore

Computes object's metaclass information and persists them in the database.

Overrides:

updateInstanceOf in class DirectWriteHBaseStore

Parameters:

object - the PersistentEObject to persist the metaclass of

Throws:

UnsupportedOperationException - operation not supported in read-only mode

getFromTable

protected Object getFromTable(PersistentEObject object,
                              EStructuralFeature feature)

Gets the EStructuralFeature feature from the Table for the PersistentEObject object.

Overrides:

getFromTable in class DirectWriteHBaseStore

Parameters:

object - the source element

feature - the EStructuralFeature to get the value of

Returns:

The value of the feature. It can be a String for single-valued EStructuralFeatures or a String[] for many-valued EStructuralFeatures

unset

public void unset(InternalEObject internalObject,
                  EStructuralFeature feature)

Description copied from class: AbstractDirectWriteStore

Unsets the feature of the object.

By default, calls the associated methods depending on the type of the feature.

Specified by:

unset in interface InternalEObject.EStore

Overrides:

unset in class DirectWriteHBaseStore

Parameters:

internalObject - the object in question.

feature - a feature of the object.

Throws:

UnsupportedOperationException - operation not supported in read-only mode

See Also:

AbstractDirectWriteStore.unsetAttribute(PersistentEObject, EAttribute), AbstractDirectWriteStore.unsetReference(PersistentEObject, EReference)

clear

public void clear(InternalEObject internalObject,
                  EStructuralFeature feature)

Description copied from class: AbstractDirectWriteStore

Removes all values form the content of the object's feature

By default, calls the associated methods depending on the type of the feature.

Specified by:

clear in interface InternalEObject.EStore

Overrides:

clear in class DirectWriteHBaseStore

Parameters:

internalObject - the object in question.

feature - a many-valued feature of the object.

Throws:

UnsupportedOperationException - operation not supported in read-only mode

See Also:

AbstractDirectWriteStore.clearAttribute(PersistentEObject, EAttribute), AbstractDirectWriteStore.clearReference(PersistentEObject, EReference)

set

public Object set(InternalEObject internalObject,
                  EStructuralFeature feature,
                  int index,
                  Object value)

Description copied from class: AbstractDirectWriteStore

Sets the value at the index in the content of the object's feature.

By default, calls the associated methods depending on the type of the feature.

Specified by:

set in interface InternalEObject.EStore

Overrides:

set in class AbstractDirectWriteStore<HBasePersistenceBackend>

Parameters:

internalObject - the object in question.

feature - a feature of the object.

index - an index within the content or InternalEObject.EStore.NO_INDEX.

value - the new value.

Returns:

the previous value.

Throws:

UnsupportedOperationException - operation not supported in read-only mode

See Also:

AbstractDirectWriteStore.setAttribute(PersistentEObject, EAttribute, int, Object), AbstractDirectWriteStore.setReference(PersistentEObject, EReference, int, PersistentEObject)

add

public void add(InternalEObject internalObject,
                EStructuralFeature feature,
                int index,
                Object value)

Description copied from class: AbstractDirectWriteStore

Adds the value at the index in the content of the object's feature.

By default, calls the associated methods depending on the type of the feature.

Specified by:

add in interface InternalEObject.EStore

Overrides:

add in class AbstractDirectWriteStore<HBasePersistenceBackend>

Parameters:

internalObject - the object in question.

feature - a many-valued feature of the object.

index - an index within the content.

value - the value to add.

Throws:

UnsupportedOperationException - operation not supported in read-only mode

See Also:

AbstractDirectWriteStore.addAttribute(PersistentEObject, EAttribute, int, Object), AbstractDirectWriteStore.addReference(PersistentEObject, EReference, int, PersistentEObject)

remove

public Object remove(InternalEObject internalObject,
                     EStructuralFeature feature,
                     int index)

Description copied from class: AbstractDirectWriteStore

Removes the value at the index in the content of the object's feature.

By default, calls the associated methods depending on the type of the feature.

Specified by:

remove in interface InternalEObject.EStore

Overrides:

remove in class AbstractDirectWriteStore<HBasePersistenceBackend>

Parameters:

internalObject - the object in question.

feature - a many-valued feature of the object.

index - the index within the feature's content of the value to remove.

Returns:

the removed value.

Throws:

UnsupportedOperationException - operation not supported in read-only mode

See Also:

AbstractDirectWriteStore.removeAttribute(PersistentEObject, EAttribute, int), AbstractDirectWriteStore.removeReference(PersistentEObject, EReference, int)

move

public Object move(InternalEObject internalObject,
                   EStructuralFeature feature,
                   int targetIndex,
                   int sourceIndex)

Description copied from interface: org.eclipse.emf.ecore.InternalEObject.EStore

Moves the value at the source index in the content of the object's feature to the target index.

Specified by:

move in interface InternalEObject.EStore

Overrides:

move in class AbstractDirectWriteStore<HBasePersistenceBackend>

Parameters:

internalObject - the object in question.

feature - a many-valued feature of the object.

targetIndex - the index within the feature's content to which to move the value.

sourceIndex - the index within the feature's content of the value to move.

Returns:

the moved value.

Throws:

UnsupportedOperationException - operation not supported in read-only mode