A Java native client for Weaviate.
To start using Weaviate Java client add this dependency to pom.xml:
<dependency> <groupId>io.weaviate</groupId> <artifactId>client</artifactId> <version>5.1.3</version> </dependency>The client utilizes Gson for JSON serialization/deserialization and Gson uses reflection of internal java.lang classes to do it. This is not allowed by default in Java 9 and above.
To work around this, it's necessary to add this JVM commandline argument:
--add-opens=java.base/java.lang=ALL-UNNAMED If you're using Gradle, you can add this instead to your application block in your build.gradle.kts file:
applicationDefaultJvmArgs += listOf( "--add-opens=java.base/java.lang=ALL-UNNAMED", )Here's a simple code to start up working with Java client:
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Add dependency to your java project.
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Connect to Weaviate on
localhost:8080and fetch meta information
package io.weaviate; import io.weaviate.client.Config; import io.weaviate.client.WeaviateClient; import io.weaviate.client.base.Result; import io.weaviate.client.v1.misc.model.Meta; public class App { public static void main(String[] args) { Config config = new Config("http", "localhost:8080"); WeaviateClient client = new WeaviateClient(config); Result<Meta> meta = client.misc().metaGetter().run(); if (meta.hasErrors()) { System.out.printf("Error: %s\n", meta.getError().getMessages()); } else { System.out.printf("meta.hostname: %s\n", meta.getResult().getHostname()); System.out.printf("meta.version: %s\n", meta.getResult().getVersion()); System.out.printf("meta.modules: %s\n", meta.getResult().getModules()); } } }