實現Kong的Java管理API - Kong最佳實踐

時間 2019-11-13

標籤實現 kong java 管理 api 最佳實踐欄目 Java 简体版

原文原文鏈接

Kong提供了Http的管理API，能夠實現對Kong的管理。咱們利用Kong的Amin API，實現一套JAVA的管理API。這裏以添加一個Service和Route爲示例：ide

使用retrofit2實現

添加Maven依賴

<dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>retrofit</artifactId>
            <version>${retrofit.version}</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>converter-gson</artifactId>
            <version>${retrofit.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.code.gson</groupId>
                    <artifactId>gson</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.1</version>
        </dependency>

實現kong客戶端的架子

添加Kong客戶端單元測試

@Data
public class KongClient {

    private ServiceService serviceService;
    private RouteService routeService;

    public KongClient(String adminUrl) {

        if (adminUrl == null || adminUrl.isEmpty()) {
            throw new IllegalArgumentException("The adminUrl cannot be null or empty!");
        }
        RetrofitServiceCreator retrofitServiceCreatorForAdminUrl = new RetrofitServiceCreator(adminUrl);
        {
            serviceService = retrofitServiceCreatorForAdminUrl.create(ServiceService.class,RetrofitServiceService.class);
            routeService = retrofitServiceCreatorForAdminUrl.create(RouteService.class,RetrofitRouteService.class);
        }
  }
}

添加Retrofit處理類測試

public class RetrofitServiceCreator {

    private Retrofit retrofit;


    // -------------------------------------------------------------------

    public RetrofitServiceCreator(String baseUrl) {

        retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .client(initOkHttpClient(baseUrl.toLowerCase().startsWith("https"))) // support https
                .addConverterFactory(CustomGsonConverterFactory.create()) // replace GsonConverterFactory

    }

    // -------------------------------------------------------------------

    @SuppressWarnings("unchecked")
    public <T> T create(Class<T> serviceInterface, Class<?> retrofitServiceInterface) {
        Object proxied = retrofit.create(retrofitServiceInterface);
        return (T) Proxy.newProxyInstance(
                RetrofitServiceCreator.class.getClassLoader(),
                new Class[] { serviceInterface },
                new RetrofitBodyExtractorInvocationHandler(proxied));
    }

    public <T> T createRetrofitService(Class<T> retrofitServiceInterface) {
        return retrofit.create(retrofitServiceInterface);
    }

    // -------------------------------------------------------------------

    private OkHttpClient initOkHttpClient(boolean supportHttps) {

        if(supportHttps) {
            HttpsUtil.SSLParams sslParams = HttpsUtil.getSslSocketFactory(null, null, null);
            OkHttpClient okHttpClient = new OkHttpClient.Builder()
                    .sslSocketFactory(sslParams.sSLSocketFactory, sslParams.trustManager)
                    .build();
            return okHttpClient;
        }

        return new OkHttpClient.Builder().build();
    }
}

添加動態代理處理類ui

@Slf4j
public class RetrofitBodyExtractorInvocationHandler implements InvocationHandler {

    private Object proxied;

    public RetrofitBodyExtractorInvocationHandler(Object proxied) {
        this.proxied = proxied;
    }

    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        String methodName = method.getName();
        Class<?>[] parameterTypes = method.getParameterTypes();
        Method method1 = proxied.getClass().getMethod(methodName, parameterTypes);
        Call call = (Call) method1.invoke(proxied, args);
        Response response = call.execute();
        log.debug("Http Request:  " + response.raw().request());
        log.debug("Http Response: " + response.raw().toString());
        if(!response.isSuccessful()) {
            throw new KongClientException(response.errorBody() != null ? response.errorBody().string() : String.valueOf(response.code()));
        }
        return response.body();
    }
}

添加自定義JSON轉換工廠this

class CustomGsonConverterFactory extends Converter.Factory {

    private final Gson gson;

    private CustomGsonConverterFactory(Gson gson) {
        if (gson == null) throw new NullPointerException("gson == null");
        this.gson = gson;
    }

    public static CustomGsonConverterFactory create() {
        return create(new Gson());
    }

    public static CustomGsonConverterFactory create(Gson gson) {
        return new CustomGsonConverterFactory(gson);
    }

    @Override
    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
        TypeAdapter<?> adapter = gson.getAdapter(TypeToken.get(type));
        return new CustomGsonResponseBodyConverter<>(gson, adapter);
    }

    @Override
    public Converter<?, RequestBody> requestBodyConverter(Type type,Annotation[] parameterAnnotations, Annotation[] methodAnnotations, Retrofit retrofit) {
        TypeAdapter<?> adapter = gson.getAdapter(TypeToken.get(type));
        return new CustomGsonRequestBodyConverter<>(gson, adapter);
    }
}

實現Service的Java Admin API

添加Service實體google

@Data @Builder
public class Service {

    private String id;
    private String name;
    private String protocol;
    private String host;
    private Integer port;
    private String path;
    private String url;
    private Integer retries;
    @SerializedName("connect_timeout")
    private Long connectTimeout;
    @SerializedName("read_timeout")
    private Long readTimeout;
    @SerializedName("write_timeout")
    private Long writeTimeout;
    @SerializedName("created_at")
    private Long createdAt;
    @SerializedName("updated_at")
    private Long updatedAt;
}

添加Service接口，這裏只要刪除和新增url

public interface ServiceService {

    Service addService(Service service);
    void deleteService(String nameOrId);
}

添加Retrofit的處理接口debug

public interface RetrofitServiceService {

    @POST("services/")
    Call<Service> addService(@Body Service request);
    @DELETE("services/{nameOrId}")
    Call<Void> deleteService(@Path("nameOrId") String nameOrId);
}

實現Route的Java Admin API

添加Route實體代理

@Data @Builder
public class Route {

    private String id;
    private List<String> protocols;
    private List<String> methods;
    private List<String> hosts;
    private List<String> paths;
    @SerializedName("strip_path")
    private Boolean stripPath;
    @SerializedName("preserve_host")
    private Boolean preserveHost;
    private Service  service;
    @SerializedName("created_at")
    private Long createdAt;
    @SerializedName("updated_at")
    private Long updatedAt;
}

添加Route接口，這裏只要刪除和新增code

public interface RouteService {

    Route addRoute(Route route);
    void DeleteRoute(String id);
}

添加Retrofit的處理接口

public interface RetrofitRouteService {
    @POST("routes/")
    Call<Route> addRoute(@Body Route route);
    @DELETE("routes/{id}")
    Call<Void> DeleteRoute(@Path("id") String id);
}

單元測試一下

新建一個名字爲example-service，地址爲http://mockbin.org的Service。併爲Service添加host爲example.com的Route路由。

public class ServiceRouteTest extends BaseTest {

    public static final String EXAMPLE_SERVICE = "example-service";

    @Test
    public void createServiceAndRouteTest(){

        // 刪除Route和Service
        CommonList<Route> commonList = kongClient.getRouteService().listRoutesByService(EXAMPLE_SERVICE);
        List<Route> routeList = commonList.getData();
        if(null!=routeList && routeList.size()>0 ){
            for (Route route : routeList) {
                kongClient.getRouteService().DeleteRoute(route.getId());
            }
        }
        kongClient.getServiceService().deleteService(EXAMPLE_SERVICE);


        // 新建Service和Route
        Service service = Service.builder().url("http://mockbin.org").name(EXAMPLE_SERVICE).build();
        Service response4service = kongClient.getServiceService().addService(service);
        printJson(response4service);
        List<String> hostList = new ArrayList<>();
        hostList.add("example.com");
        Route route = Route.builder().hosts(hostList).service(Service.builder().id(response4service.getId()).build()).build();
        Route response4route = kongClient.getRouteService().addRoute(route);
        printJson(response4route);
    }

}