Package dev.langchain4j.store.embedding.mongodb

Class MongoDbEmbeddingStore

java.lang.Object
dev.langchain4j.store.embedding.mongodb.MongoDbEmbeddingStore
All Implemented Interfaces:
dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>
public class MongoDbEmbeddingStore extends Object implements dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>
Represents a MongoDB index as an embedding store.

More info to set up MongoDb as vectorDatabase.

tutorial how to use a knn-vector in MongoDB Atlas (great starting point).

If you are using a free tier, #createIndex = true might not be supported, so you will need to create an index manually. In your Atlas web console go to: DEPLOYMENT -> Database -> {your cluster} -> Atlas Search -> Create Index Search -> "JSON Editor" under "Atlas Search" -> Next -> Select your database in the left pane -> Insert the following JSON into the right pane (set "dimensions" and "metadata"->"fields" to desired values) 

 {
   "mappings": {
     "dynamic": false,
     "fields": {
       "embedding": {
         "dimensions": 384,
         "similarity": "cosine",
         "type": "knnVector"
       },
       "metadata": {
         "dynamic": false,
         "fields": {
           "test-key": {
             "type": "token"
           }
         },
         "type": "document"
       }
     }
   }
 }
-> Next -> Create Search Index

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
    MongoDbEmbeddingStore.Builder
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    MongoDbEmbeddingStore(com.mongodb.client.MongoClient mongoClient, String databaseName, String collectionName, String indexName, Long maxResultRatio, com.mongodb.client.model.CreateCollectionOptions createCollectionOptions, org.bson.conversions.Bson filter, IndexMapping indexMapping, Boolean createIndex)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    String
    add(dev.langchain4j.data.embedding.Embedding embedding)
     
    String
    add(dev.langchain4j.data.embedding.Embedding embedding, dev.langchain4j.data.segment.TextSegment textSegment)
     
    void
    add(String id, dev.langchain4j.data.embedding.Embedding embedding)
     
    List<String>
    addAll(List<dev.langchain4j.data.embedding.Embedding> embeddings)
     
    List<String>
    addAll(List<dev.langchain4j.data.embedding.Embedding> embeddings, List<dev.langchain4j.data.segment.TextSegment> embedded)
     
    static MongoDbEmbeddingStore.Builder
    builder()
     
    List<dev.langchain4j.store.embedding.EmbeddingMatch<dev.langchain4j.data.segment.TextSegment>>
    findRelevant(dev.langchain4j.data.embedding.Embedding referenceEmbedding, int maxResults, double minScore)
     

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface dev.langchain4j.store.embedding.EmbeddingStore

    findRelevant, findRelevant, findRelevant, search

  • Constructor Details

    • MongoDbEmbeddingStore

      public MongoDbEmbeddingStore(com.mongodb.client.MongoClient mongoClient, String databaseName, String collectionName, String indexName, Long maxResultRatio, com.mongodb.client.model.CreateCollectionOptions createCollectionOptions, org.bson.conversions.Bson filter, IndexMapping indexMapping, Boolean createIndex)

  • Method Details

    • builder

      public static MongoDbEmbeddingStore.Builder builder()

    • add

      public String add(dev.langchain4j.data.embedding.Embedding embedding)
      Specified by:
      add in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>

    • add

      public void add(String id, dev.langchain4j.data.embedding.Embedding embedding)
      Specified by:
      add in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>

    • add

      public String add(dev.langchain4j.data.embedding.Embedding embedding, dev.langchain4j.data.segment.TextSegment textSegment)
      Specified by:
      add in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>

    • addAll

      public List<String> addAll(List<dev.langchain4j.data.embedding.Embedding> embeddings)
      Specified by:
      addAll in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>

    • addAll

      public List<String> addAll(List<dev.langchain4j.data.embedding.Embedding> embeddings, List<dev.langchain4j.data.segment.TextSegment> embedded)
      Specified by:
      addAll in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>

    • findRelevant

      public List<dev.langchain4j.store.embedding.EmbeddingMatch<dev.langchain4j.data.segment.TextSegment>> findRelevant(dev.langchain4j.data.embedding.Embedding referenceEmbedding, int maxResults, double minScore)
      Specified by:
      findRelevant in interface dev.langchain4j.store.embedding.EmbeddingStore<dev.langchain4j.data.segment.TextSegment>