quarkiverse · geoand · May 8, 2024 · May 7, 2024
@@ -25,6 +25,7 @@
 ** xref:pgvector-store.adoc[PgVector (PostgreSQL) Store]
 ** xref:in-process-embedding.adoc[In-Process Embeddings]
 ** xref:csv.adoc[Loading CSV files]
+** xref:neo4j.adoc[Neo4j Store]
 
 * Additional tools
 ** xref:easy-rag.adoc[Easy RAG]

@@ -0,0 +1,171 @@
+
+:summaryTableId: quarkus-langchain4j-neo4j
+[.configuration-legend]
+icon:lock[title=Fixed at build time] Configuration property fixed at build time - All other configuration properties are overridable at runtime
+[.configuration-reference.searchable, cols="80,.^10,.^10"]
+|===
+
+h|[[quarkus-langchain4j-neo4j_configuration]]link:#quarkus-langchain4j-neo4j_configuration[Configuration property]
+
+h|Type
+h|Default
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-dimension]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-dimension[quarkus.langchain4j.neo4j.dimension]`
+
+
+[.description]
+--
+Dimension of the embeddings that will be stored in the Neo4j store.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_DIMENSION+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_DIMENSION+++`
+endif::add-copy-button-to-env-var[]
+--|int 
+|required icon:exclamation-circle[title=Configuration property is required]
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-label]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-label[quarkus.langchain4j.neo4j.label]`
+
+
+[.description]
+--
+Label for the created nodes.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_LABEL+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_LABEL+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`Document`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-embedding-property]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-embedding-property[quarkus.langchain4j.neo4j.embedding-property]`
+
+
+[.description]
+--
+Name of the property to store the embedding vectors.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_EMBEDDING_PROPERTY+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_EMBEDDING_PROPERTY+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`embedding`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-id-property]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-id-property[quarkus.langchain4j.neo4j.id-property]`
+
+
+[.description]
+--
+Name of the property to store embedding IDs.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_ID_PROPERTY+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_ID_PROPERTY+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`id`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-metadata-prefix]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-metadata-prefix[quarkus.langchain4j.neo4j.metadata-prefix]`
+
+
+[.description]
+--
+Prefix to be added to the metadata keys. By default, no prefix is used.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_METADATA_PREFIX+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_METADATA_PREFIX+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-text-property]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-text-property[quarkus.langchain4j.neo4j.text-property]`
+
+
+[.description]
+--
+Name of the property to store the embedding text.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_TEXT_PROPERTY+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_TEXT_PROPERTY+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`text`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-index-name]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-index-name[quarkus.langchain4j.neo4j.index-name]`
+
+
+[.description]
+--
+Name of the index to be created for vector search.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_INDEX_NAME+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_INDEX_NAME+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`vector`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-database-name]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-database-name[quarkus.langchain4j.neo4j.database-name]`
+
+
+[.description]
+--
+Name of the database to connect to.
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_DATABASE_NAME+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_DATABASE_NAME+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`neo4j`
+
+
+a| [[quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-retrieval-query]]`link:#quarkus-langchain4j-neo4j_quarkus-langchain4j-neo4j-retrieval-query[quarkus.langchain4j.neo4j.retrieval-query]`
+
+
+[.description]
+--
+The query to use when retrieving embeddings. This query has to return the following columns:
+
+ - metadata
+ - score
+ - column of the same name as the 'id-property' value
+ - column of the same name as the 'text-property' value
+ - column of the same name as the 'embedding-property' value
+
+ifdef::add-copy-button-to-env-var[]
+Environment variable: env_var_with_copy_button:+++QUARKUS_LANGCHAIN4J_NEO4J_RETRIEVAL_QUERY+++[]
+endif::add-copy-button-to-env-var[]
+ifndef::add-copy-button-to-env-var[]
+Environment variable: `+++QUARKUS_LANGCHAIN4J_NEO4J_RETRIEVAL_QUERY+++`
+endif::add-copy-button-to-env-var[]
+--|string 
+|`RETURN properties(node) AS metadata, node.${quarkus.langchain4j.neo4j.id-property} AS ${quarkus.langchain4j.neo4j.id-property}, node.${quarkus.langchain4j.neo4j.text-property} AS ${quarkus.langchain4j.neo4j.text-property}, node.${quarkus.langchain4j.neo4j.embedding-property} AS ${quarkus.langchain4j.neo4j.embedding-property}, score`
+
+|===
@@ -0,0 +1,38 @@
+= Neo4j Store for Retrieval Augmented Generation (RAG)
+
+include::./includes/attributes.adoc[]
+
+When implementing Retrieval Augmented Generation (RAG), a robust document store is crucial. This guide demonstrates how to leverage a https://neo4j.com/[Neo4j] database as the document store.
+
+IMPORTANT: Neo4j version 5.x or later is required (to support vector search).
+
+== Leveraging the Neo4j embedding store
+
+To make use of the Neo4j embedding store, you'll need to include the following dependency:
+
+[source,xml,subs=attributes+]
+----
+<dependency>
+    <groupId>io.quarkiverse.langchain4j</groupId>
+    <artifactId>quarkus-langchain4j-neo4j</artifactId>
+</dependency>
+----
+
+The `quarkus-lanchain4j-neo4j` extension depends on another Quarkiverse
+extension, https://github.com/quarkiverse/quarkus-neo4j[quarkus-neo4j],
+which provides the Neo4j client capabilities and also Dev Services support.
+All configuration from the `quarkus-neo4j` extension is thus applicable when
+using a Neo4j database as the document store. See
+https://docs.quarkiverse.io/quarkus-neo4j/dev/index.html[quarkus-neo4j
+documentation] for more information.
+
+NOTE: To get started, only one configuration property is required to be
+set - `quarkus.langchain4j.neo4j.dimension`, which specifies the dimension
+of the embeddings that you're going to store and depends on the embedding
+model.
+
+== Configuration Settings
+
+Customize the behavior of the extension by exploring various configuration options:
+
+include::includes/quarkus-langchain4j-neo4j.adoc[leveloffset=+1,opts=optional]
@@ -250,6 +250,19 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>io.quarkiverse.langchain4j</groupId>
+            <artifactId>quarkus-langchain4j-neo4j-deployment</artifactId>
+            <version>${project.version}</version>
+            <type>pom</type>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>*</groupId>
+                    <artifactId>*</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
     </dependencies>
 
     <build>
@@ -312,6 +325,7 @@
                                     <include>quarkus-langchain4j-bam.adoc</include>
                                     <include>quarkus-langchain4j-watsonx.adoc</include>
                                     <include>quarkus-langchain4j-mistralai.adoc</include>
+                                    <include>quarkus-langchain4j-neo4j.adoc</include>
                                     <filtering>false</filtering>
                                 </resource>
                                 <resource>

@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>io.quarkiverse.langchain4j</groupId>
+        <artifactId>quarkus-langchain4j-neo4j-parent</artifactId>
+        <version>999-SNAPSHOT</version>
+    </parent>
+    <artifactId>quarkus-langchain4j-neo4j-deployment</artifactId>
+    <name>Quarkus LangChain4j - Neo4j embedding store - Deployment</name>
+    <dependencies>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-arc-deployment</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkiverse.neo4j</groupId>
+            <artifactId>quarkus-neo4j-deployment</artifactId>
+            <version>${quarkus-neo4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-neo4j</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkiverse.langchain4j</groupId>
+            <artifactId>quarkus-langchain4j-neo4j</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkiverse.langchain4j</groupId>
+            <artifactId>quarkus-langchain4j-core-deployment</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-core</artifactId>
+            <classifier>tests</classifier>
+            <type>test-jar</type>
+            <scope>test</scope>
+            <version>${langchain4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-junit5-internal</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>dev.langchain4j</groupId>
+            <artifactId>langchain4j-embeddings-all-minilm-l6-v2-q</artifactId>
+            <version>${langchain4j-embeddings.version}</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>dev.langchain4j</groupId>
+                    <artifactId>langchain4j-core</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>io.quarkus</groupId>
+                            <artifactId>quarkus-extension-processor</artifactId>
+                            <version>${quarkus.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
@@ -0,0 +1,58 @@
+package io.quarkiverse.langchain4j.neo4j;
+
+import jakarta.enterprise.context.ApplicationScoped;
+
+import org.jboss.jandex.ClassType;
+import org.jboss.jandex.DotName;
+import org.jboss.jandex.ParameterizedType;
+import org.neo4j.driver.Driver;
+
+import dev.langchain4j.data.segment.TextSegment;
+import dev.langchain4j.store.embedding.EmbeddingStore;
+import dev.langchain4j.store.embedding.neo4j.Neo4jEmbeddingStore;
+import io.quarkiverse.langchain4j.deployment.EmbeddingStoreBuildItem;
+import io.quarkiverse.langchain4j.neo4j.runtime.Neo4jEmbeddingStoreRecorder;
+import io.quarkiverse.langchain4j.neo4j.runtime.Neo4jRuntimeConfig;
+import io.quarkus.arc.deployment.SyntheticBeanBuildItem;
+import io.quarkus.arc.deployment.UnremovableBeanBuildItem;
+import io.quarkus.deployment.annotations.BuildProducer;
+import io.quarkus.deployment.annotations.BuildStep;
+import io.quarkus.deployment.annotations.ExecutionTime;
+import io.quarkus.deployment.annotations.Record;
+import io.quarkus.deployment.builditem.FeatureBuildItem;
+
+public class Neo4jEmbeddingStoreProcessor {
+
+    private static final String FEATURE = "langchain4j-neo4j";
+    private static final DotName NEO4J_EMBEDDING_STORE = DotName.createSimple(Neo4jEmbeddingStore.class);
+
+    @BuildStep
+    FeatureBuildItem feature() {
+        return new FeatureBuildItem(FEATURE);
+    }
+
+    @BuildStep
+    @Record(ExecutionTime.RUNTIME_INIT)
+    public void createBean(
+            BuildProducer<SyntheticBeanBuildItem> beanProducer,
+            Neo4jEmbeddingStoreRecorder recorder,
+            Neo4jRuntimeConfig config,
+            BuildProducer<UnremovableBeanBuildItem> unremovableProducer,
+            BuildProducer<EmbeddingStoreBuildItem> embeddingStoreProducer) {
+        unremovableProducer.produce(UnremovableBeanBuildItem.beanTypes(Driver.class));
+        beanProducer.produce(SyntheticBeanBuildItem
+                .configure(NEO4J_EMBEDDING_STORE)
+                .types(
+                        ClassType.create(EmbeddingStore.class),
+                        ClassType.create(NEO4J_EMBEDDING_STORE),
+                        ParameterizedType.create(EmbeddingStore.class, ClassType.create(TextSegment.class)))
+                .defaultBean()
+                .setRuntimeInit()
+                .defaultBean()
+                .scope(ApplicationScoped.class)
+                .addInjectionPoint(ClassType.create(DotName.createSimple(Driver.class)))
+                .createWith(recorder.embeddingStoreFunction(config))
+                .done());
+        embeddingStoreProducer.produce(new EmbeddingStoreBuildItem());
+    }
+}