build most modules with jdk 8 (#295)

Since we target java 8, CI build was updated to run most modules using
java 8, then modules requiring java 11 separately with java 11

.github/workflows/main.yaml

@@ -7,14 +7,24 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up JDK
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v3
+        with:
+          java-version: '8'
+          distribution: 'temurin'
+          cache: 'maven'
+      - name: Build with JDK 8 (excluding modules requiring JDK 11)
+        run: mvn --batch-mode install -DskipITs -pl !langchain4j-opensearch
+
+      - name: Set up JDK 11
         uses: actions/setup-java@v3
         with:
           java-version: '11'
-          distribution: 'adopt'
-      - name: Test
-        run: mvn --batch-mode test
-
+          distribution: 'temurin'
+          cache: 'maven'
+      - name: Build modules requiring JDK 11
+        run: mvn --batch-mode install -DskipITs -pl langchain4j-opensearch
 
   # For checking some compliance things (require a recent JDK due to plugins so in a separate step)
   compliance:
@@ -26,6 +36,7 @@ jobs:
         with:
           java-version: '17'
           distribution: 'temurin'
+          cache: 'maven'
         # Check we only rely on permissive licenses in the main parts of the library:
       - name: License Compliance
         run: mvn -P compliance org.honton.chas:license-maven-plugin:compliance

langchain4j-elasticsearch/src/main/java/dev/langchain4j/store/embedding/elasticsearch/ElasticsearchEmbeddingStore.java

@@ -1,34 +1,5 @@
 package dev.langchain4j.store.embedding.elasticsearch;
 
-import static dev.langchain4j.internal.Utils.isCollectionEmpty;
-import static dev.langchain4j.internal.Utils.isNullOrBlank;
-import static dev.langchain4j.internal.Utils.randomUUID;
-import static dev.langchain4j.internal.ValidationUtils.ensureNotNull;
-import static dev.langchain4j.internal.ValidationUtils.ensureTrue;
-import static java.util.Collections.singletonList;
-import static java.util.stream.Collectors.toList;
-
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-
-import org.apache.http.Header;
-import org.apache.http.HttpHost;
-import org.apache.http.auth.AuthScope;
-import org.apache.http.auth.UsernamePasswordCredentials;
-import org.apache.http.client.CredentialsProvider;
-import org.apache.http.impl.client.BasicCredentialsProvider;
-import org.apache.http.message.BasicHeader;
-import org.elasticsearch.client.RestClient;
-import org.elasticsearch.client.RestClientBuilder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
-
 import co.elastic.clients.elasticsearch.ElasticsearchClient;
 import co.elastic.clients.elasticsearch._types.InlineScript;
 import co.elastic.clients.elasticsearch._types.mapping.DenseVectorProperty;
@@ -48,11 +19,36 @@ import co.elastic.clients.json.jackson.JacksonJsonpMapper;
 import co.elastic.clients.transport.ElasticsearchTransport;
 import co.elastic.clients.transport.endpoints.BooleanResponse;
 import co.elastic.clients.transport.rest_client.RestClientTransport;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import dev.langchain4j.data.document.Metadata;
 import dev.langchain4j.data.embedding.Embedding;
 import dev.langchain4j.data.segment.TextSegment;
 import dev.langchain4j.store.embedding.EmbeddingMatch;
 import dev.langchain4j.store.embedding.EmbeddingStore;
+import org.apache.http.Header;
+import org.apache.http.HttpHost;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.CredentialsProvider;
+import org.apache.http.impl.client.BasicCredentialsProvider;
+import org.apache.http.message.BasicHeader;
+import org.elasticsearch.client.RestClient;
+import org.elasticsearch.client.RestClientBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+import static dev.langchain4j.internal.Utils.*;
+import static dev.langchain4j.internal.ValidationUtils.ensureNotNull;
+import static dev.langchain4j.internal.ValidationUtils.ensureTrue;
+import static java.util.Collections.singletonList;
+import static java.util.stream.Collectors.toList;
 
 /**
  * Represents an <a href="https://www.elastic.co/">Elasticsearch</a> index as an embedding store.
@@ -103,9 +99,9 @@ public class ElasticsearchEmbeddingStore implements EmbeddingStore<TextSegment>
         this.objectMapper = new ObjectMapper();
     }
 
-    public ElasticsearchEmbeddingStore(RestClient client, String indexName) {
+    public ElasticsearchEmbeddingStore(RestClient restClient, String indexName) {
         JsonpMapper mapper = new JacksonJsonpMapper();
-        ElasticsearchTransport transport = new RestClientTransport(client, mapper);
+        ElasticsearchTransport transport = new RestClientTransport(restClient, mapper);
 
         this.client = new ElasticsearchClient(transport);
         this.indexName = ensureNotNull(indexName, "indexName");
@@ -122,11 +118,12 @@ public class ElasticsearchEmbeddingStore implements EmbeddingStore<TextSegment>
         private String apiKey;
         private String userName;
         private String password;
-        private RestClient client;
+        private RestClient restClient;
         private String indexName = "default";
 
         /**
          * @param serverUrl Elasticsearch Server URL
+         * @return builder
          */
         public Builder serverUrl(String serverUrl) {
             this.serverUrl = serverUrl;
@@ -162,16 +159,18 @@ public class ElasticsearchEmbeddingStore implements EmbeddingStore<TextSegment>
 
         /**
          * @param restClient Elasticsearch RestClient (optional).
-         *                   Effectively overrides all other connection parameters serverUrl, etc.
+         *                   Effectively overrides all other connection parameters like serverUrl, etc.
+         * @return builder
          */
-        public Builder restClient(RestClient client) {
-            this.client = client;
+        public Builder restClient(RestClient restClient) {
+            this.restClient = restClient;
             return this;
         }
 
         /**
          * @param indexName Elasticsearch index name (optional).
          *                  Default value: "default".
+         * @return builder
          */
         public Builder indexName(String indexName) {
             this.indexName = indexName;
@@ -179,8 +178,8 @@ public class ElasticsearchEmbeddingStore implements EmbeddingStore<TextSegment>
         }
 
         public ElasticsearchEmbeddingStore build() {
-            if (client != null) {
-                return new ElasticsearchEmbeddingStore(client, indexName);
+            if (restClient != null) {
+                return new ElasticsearchEmbeddingStore(restClient, indexName);
             } else {
                 return new ElasticsearchEmbeddingStore(serverUrl, apiKey, userName, password, indexName);
             }

langchain4j-parent/pom.xml

@@ -200,12 +200,6 @@
                 <version>${spring-boot.version}</version>
             </dependency>
 
-            <dependency>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-configuration-processor</artifactId>
-                <version>${spring-boot.version}</version>
-            </dependency>
-
             <dependency>
                 <groupId>org.apache.httpcomponents.client5</groupId>
                 <artifactId>httpclient5</artifactId>