Class: ActiveFedora::SolrService

Inherits:
Object
  • Object
show all
Includes:
Loggable, Solrizer::FieldNameMapper
Defined in:
lib/active_fedora/solr_service.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, args) ⇒ SolrService

Returns a new instance of SolrService.



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# File 'lib/active_fedora/solr_service.rb', line 19

def initialize(host, args)
  host = 'http://localhost:8080/solr' unless host
  args = {:read_timeout => 120, :open_timeout => 120}.merge(args.dup)
  args.merge!(:url=>host)
  @conn = RSolr.connect args
end

Instance Attribute Details

#conn ⇒ Object (readonly)

Returns the value of attribute conn.



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# File 'lib/active_fedora/solr_service.rb', line 9

def conn
  @conn
end

Class Method Details

.add(doc) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 99

def self.add(doc)
  SolrService.instance.conn.add(doc)
end

.class_from_solr_document(hit) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 50

def self.class_from_solr_document(hit)
    model_value = nil
    hit[solr_name("has_model", :symbol)].each {|value| model_value ||= Model.from_class_uri(value)}
    logger.warn "Could not find a model for #{hit["id"]}, defaulting to ActiveFedora::Base" unless model_value
    model_value || ActiveFedora::Base
end

.commit ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 103

def self.commit
  SolrService.instance.conn.commit
end

.construct_query_for_pids(pid_array) ⇒ Object

Construct a solr query for a list of pids This is used to get a solr response based on the list of pids in an object’s RELS-EXT relationhsips If the pid_array is empty, defaults to a query of “id:NEVER_USE_THIS_ID”, which will return an empty solr response

Parameters:

  • pid_array (Array) —

    the pids that you want included in the query



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# File 'lib/active_fedora/solr_service.rb', line 61

def self.construct_query_for_pids(pid_array)
  query = ""
  pid_array.each_index do |i|
    query << "#{SOLR_DOCUMENT_ID}:#{escape_uri_for_query(pid_array[i])}"
    query << " OR " if i != pid_array.length-1
  end
  query = "id:NEVER_USE_THIS_ID" if query.empty? || query == "id:"
  return query
end

.construct_query_for_rel(args) ⇒ Object

Create a query with a clause for each key, value

Parameters:

  • args (Hash) —

    key is the predicate, value is the target_uri



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# File 'lib/active_fedora/solr_service.rb', line 77

def self.construct_query_for_rel(args)
  clauses = args.map do |predicate, target_uri|
    "#{solr_name(predicate, :symbol)}:#{escape_uri_for_query(target_uri)}"
  end
  clauses.join(" AND ")
end

.count(query) ⇒ Object

Get the count of records that match the query

Parameters:

  • query (String) —

    a solr query



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# File 'lib/active_fedora/solr_service.rb', line 95

def self.count(query)
    SolrService.query(query, :raw=>true, :rows=>0)['response']['numFound'].to_i
end

.escape_uri_for_query(uri) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 71

def self.escape_uri_for_query(uri)
  return uri.gsub(/(:)/, '\\:').gsub(/(\/)/, '\\/')
end

.instance ⇒ Object

Raises:



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# File 'lib/active_fedora/solr_service.rb', line 26

def self.instance
# Register Solr
    
  unless Thread.current[:solr_service]
    register(ActiveFedora.solr_config[:url])
  end

  raise SolrNotInitialized unless Thread.current[:solr_service]
  Thread.current[:solr_service]
end

.query(query, args = {}) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 84

def self.query(query, args={})
  raw = args.delete(:raw)
  args = args.merge(:q=>query, :qt=>'standard')
  result = SolrService.instance.conn.get('select', :params=>args)
  return result if raw
  result['response']['docs']
end

.register(host = nil, args = {}) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 11

def self.register(host=nil, args={})
  Thread.current[:solr_service]=self.new(host, args)
end

.reify_solr_results(solr_result, opts = {}) ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 37

def self.reify_solr_results(solr_result,opts={})
  results = []
  solr_result.each do |hit|
    classname = class_from_solr_document(hit)
    if opts[:load_from_solr]
      results << classname.load_instance_from_solr(hit[SOLR_DOCUMENT_ID])
    else
      results << classname.find(hit[SOLR_DOCUMENT_ID])
    end
  end
  return results
end

.reset! ⇒ Object 



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# File 'lib/active_fedora/solr_service.rb', line 15

def self.reset!
  Thread.current[:solr_service] = nil
end