To develop scheduling rest client

I am trying to develop scheduling rest client.
The task is:

1. There is Rest API
2. I would like to send GET requests on schedule

I created the Spring boot application:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

}

I created the scheduler config:

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;

@Configuration
@EnableScheduling
@EnableAsync
@ConditionalOnProperty(name = "scheduler.enabled", matchIfMissing = true)
public class SchedulerConfig { }

I created java class which send requests to rest API:

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Service
public class GetAllData {

    @Value("${server.url}")
    private String serverUrl;

    @Value("${security.oauth2.client.clientSecret}")
    private String clientSecret;

    private static RestClientGetExecute restClientGetExecute;

    public void get() {
        // Do send request 
    }
}

Finally, I created java class which initiates request sending, as I am expecting:

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.time.ZonedDateTime;

@Component
public class TestEngine {
    private static GetAllData getAllData;
    @Scheduled(fixedDelay = 2000)
    public void getLocalDateTimeFixedDelay() throws InterruptedException {
        getAllData.get();
    }
}

But it doesn’t work. The error is:

java.lang.NullPointerException: Cannot invoke GetAllData.get()" because "TestEngine.getAllData" is null

Could you help me please to find out how to run schedule sending requests to REST API?

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