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neow3j: Java/Kotlin/Android Development Toolkit for the Neo Blockchain

There is a newer version: 3.23.0

package io.neow3j.protocol;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.neow3j.protocol.core.Request;
import io.neow3j.protocol.core.Response;
import io.neow3j.protocol.notifications.Notification;
import io.neow3j.utils.Async;
import rx.Observable;

import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;

/**
 * Base service implementation.
 */
public abstract class Service implements Neow3jService {

    protected final ObjectMapper objectMapper;

    protected ExecutorService asyncExecutorService;

    /**
     * Create a Service.
     *
     * @param executorService     an external ExecutorService where {@link Request} calls should run.
     * @param includeRawResponses option to include or not raw responses on the {@link Response} object.
     */
    public Service(ExecutorService executorService, boolean includeRawResponses) {
        objectMapper = ObjectMapperFactory.getObjectMapper(includeRawResponses);
        asyncExecutorService = executorService;
    }

    /**
     * Create a Service.
     *
     * @param includeRawResponses option to include or not raw responses on the {@link Response} object.
     */
    public Service(boolean includeRawResponses) {
        objectMapper = ObjectMapperFactory.getObjectMapper(includeRawResponses);
    }

    protected abstract InputStream performIO(String payload) throws IOException;

    @Override
    public  T send(
            Request request, Class responseType) throws IOException {
        String payload = objectMapper.writeValueAsString(request);

        try (InputStream result = performIO(payload)) {
            if (result != null) {
                return objectMapper.readValue(result, responseType);
            } else {
                return null;
            }
        }
    }

    @Override
    public  CompletableFuture sendAsync(
            Request jsonRpc20Request, Class responseType) {
        return Async.run(() ->
                send(jsonRpc20Request, responseType), asyncExecutorService);
    }

    @Override
    public > Observable subscribe(
            Request request, String unsubscribeMethod, Class responseType) {
        throw new UnsupportedOperationException(
                String.format("Service %s does not support subscriptions", this.getClass()
                        .getSimpleName()));
    }
}