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.. raw:: latex
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\newpage
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Metacat Indexing
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===========================
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Lorem ipsum
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SOLR background information
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---------------------------
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Features:
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* something
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* something
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* more
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* even more
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Something to explain the advantage of solr over the old metacat index approach
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Indexed documents and fields
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-----------------------------
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Metacat reuses the default DataONE index which includes many common metadata formats
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out-of-the-box
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1. EML
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2. FGDC
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3. Dryad
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Default indexed fields
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-----------------------
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Describe the existing fields like in the DataONE docs, with link to them
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Index configuration overview
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----------------------------
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Describe the configuration files and extension points for the implementation
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Adding additional document types and fields
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--------------------------------------------
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Step-by-step guide for adding new documents and indexed fields.
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Querying the index
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--------------------
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Provide example SOLR queries and expected results. Show a variety of return types
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and query facets.
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Access Policy enforcement
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-------------------------
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Explain how access control is processed and honored when utilizing the index.
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Regenerating the index from scratch
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-----------------------------------
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When the SOLR index has been drastically modified, a complete regenration of the
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index may be necessary. In order to accomplish this:
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Step-by-step instructions
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NOTE: this may take a long time depending on the size of your Metacat store.
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Class design overview
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----------------------
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.. figure:: images/indexing-class-diagram.png
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Figure 1. Class design overview.
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..
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@startuml images/indexing-class-diagram.png
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package "Current cn-index-processor (library)" {
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interface IDocumentSubprocessor {
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+ boolean canProcess(Document doc)
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+ initExpression(XPath xpath)
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+ Map<String, SolrDoc> processDocument(String identifier, Map<String, SolrDoc> docs, Document doc)
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}
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class AbstractDocumentSubprocessor {
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- List<SolrField> fields
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+ setMatchDocument(String matchDocument)
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+ setFieldList(List<SolrField> fieldList)
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}
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class ResourceMapSubprocessor {
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}
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class ScienceMetadataDocumentSubprocessor {
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}
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interface ISolrField {
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+ initExpression(XPath xpathObject)
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+ List<SolrElementField> getFields(Document doc, String identifier)
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}
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class SolrField {
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- String name
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- String xpath
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- boolean multivalue
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}
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class CommonRootSolrField {
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}
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class RootElement {
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}
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class LeafElement {
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}
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class FullTextSolrField {
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}
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class MergeSolrField {
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}
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class ResolveSolrField {
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}
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class SolrFieldResourceMap {
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}
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class SolrDoc {
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- List<SolrElementField> fieldList
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}
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class SolrElementField {
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- String name
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- String value
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}
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}
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IDocumentSubprocessor <|-- AbstractDocumentSubprocessor
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AbstractDocumentSubprocessor <|-- ResourceMapSubprocessor
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AbstractDocumentSubprocessor <|-- ScienceMetadataDocumentSubprocessor
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ISolrField <|-- SolrField
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SolrField <|-- CommonRootSolrField
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CommonRootSolrField o--"1" RootElement
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RootElement o--"*" LeafElement
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SolrField <|-- FullTextSolrField
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SolrField <|-- MergeSolrField
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SolrField <|-- ResolveSolrField
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SolrField <|-- SolrFieldResourceMap
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AbstractDocumentSubprocessor o--"*" ISolrField
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IDocumentSubprocessor --> SolrDoc
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SolrDoc o--"*" SolrElementField
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package "SOLR (library)" {
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abstract class SolrServer {
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+ add(SolrInputDocument doc)
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+ deleteByQuery(String id)
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+ query(SolrQuery query)
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}
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class EmbeddedSolrServer {
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}
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class HttpSolrServer {
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}
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}
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SolrServer <|-- EmbeddedSolrServer
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SolrServer <|-- HttpSolrServer
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package "Stand-alone indexer (webapp or daemon)" {
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class ApplicationController {
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- List<SolrIndex> solrIndex
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+ regenerateIndex()
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}
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class SolrIndex {
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- List<IDocumentSubprocessor> subprocessors
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- SolrServer solrServer
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+ insert(String pid, InputStream data)
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+ update(String pid, InputStream data)
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+ remove(String pid)
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}
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class SystemMetadataEventListener {
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- SolrIndex solrIndex
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- IMap hzSystemMetadata
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- IMap hzObjectPath
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+ entryAdded(EntryEvent<Identifier, SystemMetadata>)
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+ entryUpdated(EntryEvent<Identifier, SystemMetadata>)
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+ entryRemoved(EntryEvent<Identifier, SystemMetadata>)
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}
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}
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package "Metacat (webapp)" {
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class MetacatSolrIndex {
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- SolrServer solrServer
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+ InputStream query(SolrQuery)
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}
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class HazelcastService {
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- IMap hzSystemMetadata
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}
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class ObjectPathMap {
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- IMap hzObjectPath
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}
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}
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MetacatSolrIndex o--"1" SolrServer
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HazelcastService .. SystemMetadataEventListener
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ObjectPathMap .. SystemMetadataEventListener
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ApplicationController o--"*" SolrIndex
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SolrIndex o--"1" SolrServer
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SolrIndex "1"--o SystemMetadataEventListener
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SolrIndex o--"*" IDocumentSubprocessor: Assembled using Spring bean configuration
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@enduml
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