org.opennms.newts.cassandra.search

Class GuavaResourceMetadataCache

java.lang.Object

org.opennms.newts.cassandra.search.GuavaResourceMetadataCache

All Implemented Interfaces:

ResourceMetadataCache

public class GuavaResourceMetadataCache
extends Object
implements ResourceMetadataCache

Constructor Summary

Constructors

Constructor and Description
GuavaResourceMetadataCache(long maxSize, com.codahale.metrics.MetricRegistry registry)

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<ResourceMetadata>	get(org.opennms.newts.api.Context context, org.opennms.newts.api.Resource resourceId) Returns an Optional of the ResourceMetadata for context and resource, or Optional.absent() if one does not exist.
void	merge(org.opennms.newts.api.Context context, org.opennms.newts.api.Resource resource, ResourceMetadata metadata) Merges the contents of a ResourceMetadata with the cached instance corresponding to context and resource.

Methods inherited from class java.lang.Object

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

Constructor Detail

GuavaResourceMetadataCache

@Inject
public GuavaResourceMetadataCache(@Named(value="search.resourceMetadata.maxCacheEntries")
                                          long maxSize,
                                          com.codahale.metrics.MetricRegistry registry)

Method Detail

get

public com.google.common.base.Optional<ResourceMetadata> get(org.opennms.newts.api.Context context,
                                                             org.opennms.newts.api.Resource resourceId)

Description copied from interface: ResourceMetadataCache

Returns an Optional of the ResourceMetadata for context and resource, or Optional.absent() if one does not exist.

Specified by:

get in interface ResourceMetadataCache

Parameters:

context - application context of the resource metadata

resourceId - the resource

Returns:

resource metadata corresponding to context and resource

merge

public void merge(org.opennms.newts.api.Context context,
                  org.opennms.newts.api.Resource resource,
                  ResourceMetadata metadata)

Description copied from interface: ResourceMetadataCache

Merges the contents of a ResourceMetadata with the cached instance corresponding to context and resource. If no such ResourceMetadata instance exists, the supplied value is stored as-is.

Specified by:

merge in interface ResourceMetadataCache

Parameters:

context - application context of the resource metadata

resource - the resource

metadata - metadata associated with the resource