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Java SDK

Build distributed applications using the Dapr Java SDK. The Dapr Java SDK provides client libraries and Spring Boot integration to interact with Dapr building blocks and APIs.

Resources​

Prerequisites:

Installation​

Maven

Add the following to your pom.xml:

<dependency>
    <groupId>io.dapr</groupId>
    <artifactId>dapr-sdk</artifactId>
    <version>1.xx.x</version>
</dependency>
Gradle

Add the following to your build.gradle:

dependencies {
    implementation 'io.dapr:dapr-sdk:1.xx.x'
}
Spring Boot Integration

If you're using Spring Boot, check out the Spring Boot Integration, which provides Spring Data abstractions, Spring Messaging patterns, and auto-configuration for a more Spring-native development experience.

Dapr Client APIs​

Use the Dapr Client to interact with Dapr building blocks and APIs with Java-specific examples and code samples.

State Management

Store and retrieve application state using key-value pairs with Java code examples

Service Invocation

Invoke methods on other services securely and reliably with Java SDK

Publish

Publish events to topics for event-driven communication in Java

Bindings

Interact with external systems through input and output bindings using Java

Secrets Management

Securely retrieve secrets from configured secret stores with Java examples

Conversation

Interact with Large Language Models (LLMs) using the Dapr Conversation API with Java

Dapr Server​

Build services that can be invoked by other services and subscribe to topics using Java.

Service Invocation Server

Create services that can be invoked by other Dapr applications

Pub/Sub Subscriptions

Subscribe to topics and handle messages

Binding Invocation Handler

Handle input bindings from external systems

Advanced Features​

Actors

Build virtual actors with state, timers, and reminders using Java SDK

Workflow

Create durable, long-running workflows with Java code examples

Jobs

Schedule, get, and delete jobs with Java SDK examples

Distributed Lock

Acquire and release distributed locks for synchronization with Java

Authentication

Configure API token authentication for Dapr client in Java

Spring Boot Integration​

Leverage the Spring Boot programming model with Dapr using the dapr-spring-boot-starter integration. This provides familiar Spring abstractions including:

  • Spring Data Integration: Use CrudRepository and KeyValueTemplate for state management
  • Spring Messaging: Use DaprMessagingTemplate and @Topic annotations for pub/sub
  • Auto-Configuration: Automatic bean discovery and dependency injection
  • Testcontainers Support: Easy testing with integrated Dapr containers

Spring Boot Integration Guide

Learn how to use Spring Data, Spring Messaging, and Dapr Workflows with Spring Boot

Getting Started​

Java Examples

Samples that highlight the Java SDK Capabilities

Java Client Documentation

Complete Java client SDK guide with code examples

Catalyst Quickstarts​

State Quickstart

Get started with state management in Catalyst

Pub/Sub Quickstart

Get started with publish and subscribe in Catalyst

Service Invocation Quickstart

Get started with service invocation in Catalyst