io.relayr.java.api.ApiHelper Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of java-sdk Show documentation
Java SDK for connecting to the Relayr Cloud
The newest version!
package io.relayr.java.api;

import com.squareup.okhttp.Cache;
import com.squareup.okhttp.OkHttpClient;

import java.io.File;

import retrofit.Endpoint;
import retrofit.ErrorHandler;
import retrofit.RequestInterceptor;
import retrofit.RestAdapter;
import retrofit.RestAdapter.LogLevel;
import retrofit.RetrofitError;
import retrofit.client.Client;
import retrofit.client.Response;

import static io.relayr.java.RelayrJavaApp.getToken;
import static io.relayr.java.RelayrJavaApp.getUserAgent;
import static io.relayr.java.api.ApiHelper.InterceptorType.MODELS;
import static io.relayr.java.api.ApiHelper.InterceptorType.OAUTH;

public class ApiHelper {

    public ApiHelper() {}

    public enum InterceptorType {API, OAUTH, MODELS}

    private static final int DISK_CACHE_SIZE = 10 * 1024 * 1024; // 10MB

    private static final RequestInterceptor defaultInterceptor = new RequestInterceptor() {
        @Override
        public void intercept(RequestFacade request) {
            request.addHeader("User-Agent", getUserAgent());
            request.addHeader("Authorization", getToken());
            request.addHeader("Content-Type", "application/json; charset=UTF-8");
        }
    };

    private static final RequestInterceptor modelsInterceptor = new RequestInterceptor() {
        @Override
        public void intercept(RequestFacade request) {
            request.addHeader("User-Agent", getUserAgent());
            request.addHeader("Authorization", getToken());
            request.addHeader("Content-Type", "application/hal+json");
        }
    };

    private static final RequestInterceptor oauthInterceptor = new RequestInterceptor() {
        @Override
        public void intercept(RequestFacade request) {
            request.addHeader("User-Agent", getUserAgent());
        }
    };

    public OkHttpClient createOkHttpClient() {
        OkHttpClient client = new OkHttpClient();
        client.setCache(new Cache(new File("/", "https"), DISK_CACHE_SIZE));
        return client;
    }

    public RestAdapter createAdapter(Client client, Endpoint endpoint, InterceptorType type, LogLevel level) {
        return new RestAdapter.Builder()
                .setClient(client)
                .setEndpoint(endpoint)
                .setErrorHandler(new ApiErrorHandler())
                .setLogLevel(level)
                .setRequestInterceptor(
                        type == OAUTH ? oauthInterceptor :
                                type == MODELS ? modelsInterceptor :
                                        defaultInterceptor)
                .build();
    }

    class ApiErrorHandler implements ErrorHandler {
        @Override public Throwable handleError(RetrofitError cause) {
            Response response = cause.getResponse();
            if (response != null && response.getStatus() == 401)
                return new UnauthorizedException(cause);
            if (response != null && response.getStatus() > 301)
                return new Exception(cause);
            return cause;
        }
    }

    public class UnauthorizedException extends Throwable {
        public UnauthorizedException(RetrofitError cause) {
            super(cause);
        }
    }
}