Package org.opendaylight.genius.mdsalutil.cache

Class DataObjectCache<K,V extends org.opendaylight.yangtools.yang.binding.DataObject>

java.lang.Object

org.opendaylight.genius.mdsalutil.cache.DataObjectCache<K,V>

All Implemented Interfaces:

java.lang.AutoCloseable

Direct Known Subclasses:

DpnTepStateCache, IfIndexInterfaceCache, InstanceIdDataObjectCache, OvsBridgeEntryCache, OvsBridgeRefEntryCache

public class DataObjectCache<K,V extends org.opendaylight.yangtools.yang.binding.DataObject>
extends java.lang.Object
implements java.lang.AutoCloseable

Caches DataObjects of a particular type. The cache is updated by a DataTreeChangeListener.

Author:

Thomas Pantelis

Constructor Summary

Constructors

Constructor

Description

DataObjectCache(java.lang.Class<V> dataObjectClass, org.opendaylight.mdsal.binding.api.DataBroker dataBroker, org.opendaylight.mdsal.common.api.LogicalDatastoreType datastoreType, org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> listenerRegistrationPath, org.opendaylight.infrautils.caches.CacheProvider cacheProvider, java.util.function.BiFunction<org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V>,V,K> keyFunction, java.util.function.Function<K,org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V>> instanceIdFunction)

Constructor.

Method Summary

Modifier and Type	Method	Description
protected void	added(org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> path, V dataObject)
protected void	checkIsClosed()
void	close()
@NonNull java.util.Optional<V>	get(@NonNull K key)	Gets the DataObject for the given key.
@NonNull java.util.Collection<V>	getAllPresent()	Gets all DataObjects currently in the cache.
protected void	removed(org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> path, V dataObject)

Methods inherited from class java.lang.Object

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

Constructor Detail

DataObjectCache

public DataObjectCache(java.lang.Class<V> dataObjectClass,
                       org.opendaylight.mdsal.binding.api.DataBroker dataBroker,
                       org.opendaylight.mdsal.common.api.LogicalDatastoreType datastoreType,
                       org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> listenerRegistrationPath,
                       org.opendaylight.infrautils.caches.CacheProvider cacheProvider,
                       java.util.function.BiFunction<org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V>,V,K> keyFunction,
                       java.util.function.Function<K,org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V>> instanceIdFunction)

Constructor.

Parameters:

dataObjectClass - the DataObject class to cache

dataBroker - the DataBroker

datastoreType - the LogicalDatastoreType

listenerRegistrationPath - the yang path for which register the listener

cacheProvider - the CacheProvider used to instantiate the Cache

keyFunction - the function used to convert or extract the key instance on change notification

instanceIdFunction - the function used to convert a key instance to an InstanceIdentifier on read

Method Detail

close

@PreDestroy
public void close()

Specified by:

close in interface java.lang.AutoCloseable

checkIsClosed

protected void checkIsClosed()
                      throws org.opendaylight.mdsal.common.api.ReadFailedException

Throws:

org.opendaylight.mdsal.common.api.ReadFailedException

get

public @NonNull java.util.Optional<V> get(@NonNull K key)
                                   throws org.opendaylight.mdsal.common.api.ReadFailedException

Gets the DataObject for the given key. If there's no DataObject cached, it will be read from the data store and put in the cache if it exists.

Parameters:

key - identifies the DataObject to query

Returns:

if the data for the supplied key exists, returns an Optional object containing the data; otherwise, returns Optional#absent()

Throws:

org.opendaylight.mdsal.common.api.ReadFailedException - if that data isn't cached and the read to fetch it fails

getAllPresent

public @NonNull java.util.Collection<V> getAllPresent()

Gets all DataObjects currently in the cache.

Returns:

the DataObjects currently in the cache

added

protected void added(org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> path,
                     V dataObject)

removed

protected void removed(org.opendaylight.yangtools.yang.binding.InstanceIdentifier<V> path,
                       V dataObject)