wrap a SphereClient to send a correlation ID

CorrelationIdSphereClient.java

import io.sphere.sdk.client.*;

import java.util.UUID;
import java.util.concurrent.CompletionStage;

public class CorrelationIdSphereClient extends SphereClientDecorator {
    public CorrelationIdSphereClient(SphereClient delegate) {
        super(delegate);
    }

    @Override
    public <T> CompletionStage<T> execute(SphereRequest<T> sphereRequest) {
        return super.execute(new CorrelationIdSphereRequest<>(sphereRequest));
    }

    private static final class CorrelationIdSphereRequest<T> extends SphereRequestDecorator<T> {
        private CorrelationIdSphereRequest(SphereRequest<T> delegate) {
            super(delegate);
        }

        @Override
        public HttpRequestIntent httpRequestIntent() {
            return super.httpRequestIntent().plusHeader("X-Correlation-ID", UUID.randomUUID().toString());
        }
    }
}