Bolt for Java + Spring Boot

README.md

export SLACK_SIGNING_SECRET=xxx
export SLACK_APP_CLIENT_ID=111.222
export SLACK_APP_CLIENT_SECRET=xxx
export SLACK_APP_SCOPE=commands,chat:write.public,chat:write
export SLACK_APP_USER_SCOPE=
export SLACK_APP_REDIRECT_URI=
export SLACK_APP_OAUTH_START_PATH=/slack/oauth/start
export SLACK_APP_OAUTH_CALLBACK_PATH=/slack/oauth/callback
export SLACK_APP_OAUTH_COMPLETION_URL=https://www.example.com/completion
export SLACK_APP_OAUTH_CANCELLATION_URL=https://www.example.com/cancellation

gradle clean bootRun

Application.java

package hello;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication
@ServletComponentScan
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

application.yml

logging.level:
  com.slack.api: DEBUG
server:
  port: 3000

build.gradle

plugins {
  id 'org.springframework.boot' version '2.3.3.RELEASE'
  id 'io.spring.dependency-management' version '1.0.10.RELEASE'
  id 'java'
}
group = 'com.example'
version = '0.0.1-SNAPSHOT'
repositories {
  mavenCentral()
  mavenLocal()
}
dependencies {
  implementation 'org.springframework.boot:spring-boot-starter-web'
  implementation 'com.squareup.okhttp3:okhttp:4.8.1'
  implementation 'com.slack.api:bolt-servlet:1.1.3'
}

SlackApp.java

package hello;

import com.slack.api.bolt.App;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class SlackApp {
    @Bean
    public App initSlackApp() {
        App app = new App().asOAuthApp(true);
        app.command("/hello-oauth-app", (req, ctx) -> {
            return ctx.ack("What's up?");
        });
        return app;
    }
}

SlackEventsController.java

package hello;

import com.slack.api.bolt.App;
import com.slack.api.bolt.servlet.SlackAppServlet;

import javax.servlet.annotation.WebServlet;

@WebServlet("/slack/events")
public class SlackEventsController extends SlackAppServlet {
    public SlackEventsController(App app) {
        super(app);
    }
}

SlackOAuthCallbackController.java

package hello;

import com.slack.api.bolt.App;
import com.slack.api.bolt.servlet.SlackOAuthAppServlet;

import javax.servlet.annotation.WebServlet;

@WebServlet("/slack/oauth/callback")
public class SlackOAuthCallbackController extends SlackOAuthAppServlet {
    public SlackOAuthCallbackController(App app) {
        super(app);
    }
}

SlackOAuthStartController.java

package hello;

import com.slack.api.bolt.App;
import com.slack.api.bolt.servlet.SlackAppServlet;
import com.slack.api.bolt.servlet.SlackOAuthAppServlet;

import javax.servlet.annotation.WebServlet;

@WebServlet("/slack/oauth/start")
public class SlackOAuthStartController extends SlackOAuthAppServlet {
    public SlackOAuthStartController(App app) {
        super(app);
    }
}