Class: Libcouchbase::QueryN1QL
- Inherits:
-
Object
- Object
- Libcouchbase::QueryN1QL
- Defined in:
- lib/libcouchbase/query_n1ql.rb
Constant Summary collapse
- N1P_QUERY_STATEMENT =
1
Instance Attribute Summary collapse
-
#connection ⇒ Object
readonly
Returns the value of attribute connection.
-
#n1ql ⇒ Object
readonly
Returns the value of attribute n1ql.
Instance Method Summary collapse
- #cancel ⇒ Object
- #error(obj) ⇒ Object
- #get_count(metadata) ⇒ Object
-
#initialize(connection, reactor, n1ql, **opts) ⇒ QueryN1QL
constructor
A new instance of QueryN1QL.
- #perform(limit: nil, **options, &blk) ⇒ Object
-
#received(row) ⇒ Object
Row is JSON value representing the result.
-
#received_final(metadata) ⇒ Object
Example metadata :signature=>{:*=>“*”, :results=>[], :status=>“success”, :metrics=>:executionTime=>“15.256975ms”, :resultCount=>12, :resultSize=>8964}.
Constructor Details
#initialize(connection, reactor, n1ql, **opts) ⇒ QueryN1QL
Returns a new instance of QueryN1QL.
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# File 'lib/libcouchbase/query_n1ql.rb', line 8 def initialize(connection, reactor, n1ql, **opts) @connection = connection @reactor = reactor @n1ql = n1ql @request_handle = FFI::MemoryPointer.new :pointer, 1 end |
Instance Attribute Details
#connection ⇒ Object (readonly)
Returns the value of attribute connection.
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# File 'lib/libcouchbase/query_n1ql.rb', line 17 def connection @connection end |
#n1ql ⇒ Object (readonly)
Returns the value of attribute n1ql.
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# File 'lib/libcouchbase/query_n1ql.rb', line 17 def n1ql @n1ql end |
Instance Method Details
#cancel ⇒ Object
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# File 'lib/libcouchbase/query_n1ql.rb', line 111 def cancel @error = :cancelled unless @error @reactor.schedule { if @connection.handle && @cmd Ext.n1ql_cancel(@connection.handle, @handle_ptr.get_pointer(0)) received_final(nil) end } end |
#error(obj) ⇒ Object
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# File 'lib/libcouchbase/query_n1ql.rb', line 106 def error(obj) @error = obj received_final(nil) end |
#get_count(metadata) ⇒ Object
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# File 'lib/libcouchbase/query_n1ql.rb', line 20 def get_count() [:metrics][:resultCount] end |
#perform(limit: nil, **options, &blk) ⇒ Object
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# File 'lib/libcouchbase/query_n1ql.rb', line 24 def perform(limit: nil, **, &blk) raise 'not connected' unless @connection.handle raise 'query already in progress' if @query_text raise 'callback required' unless block_given? # customise the size based on the request being made orig_limit = @n1ql.limit begin if orig_limit && limit @n1ql.limit = limit if orig_limit > limit end @query_text = @n1ql.to_s rescue @query_text = nil raise ensure @n1ql.limit = orig_limit end @reactor.schedule { @error = nil @callback = blk @cmd = Ext::CMDN1QL.new @params = Ext.n1p_new err = Ext.n1p_setquery(@params, @query_text, @query_text.bytesize, N1P_QUERY_STATEMENT) if err == :success err = Ext.n1p_mkcmd(@params, @cmd) if err == :success pointer = @cmd.to_ptr @connection.requests[pointer.address] = self @cmd[:callback] = @connection.get_callback(:n1ql_callback) @cmd[:handle] = @request_handle err = Ext.n1ql_query(@connection.handle, pointer, @cmd) if err != :success error(Error.lookup(err).new('full text search not scheduled')) end else error(Error.lookup(err).new('failed to build full text search command')) end else error(Error.lookup(err).new('failed to build full text search query structure')) end } end |
#received(row) ⇒ Object
Row is JSON value representing the result
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# File 'lib/libcouchbase/query_n1ql.rb', line 75 def received(row) return if @error @callback.call(false, row) rescue => e @error = e cancel end |
#received_final(metadata) ⇒ Object
Example metadata :signature=>{:*=>“*”, :results=>[], :status=>“success”,
:metrics=>{:elapsedTime=>"15.298243ms", :executionTime=>"15.256975ms", :resultCount=>12, :resultSize=>8964}}
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# File 'lib/libcouchbase/query_n1ql.rb', line 86 def received_final() @query_text = nil @connection.requests.delete(@cmd.to_ptr.address) @cmd = nil Ext.n1p_free(@params) @params = nil if @error if @error == :cancelled @callback.call(:final, ) else @callback.call(:error, @error) end else @callback.call(:final, ) end end |