com.workiva.frugal.middleware.ServiceMiddleware Maven / Gradle / Ivy
/*
* Copyright 2017 Workiva
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.workiva.frugal.middleware;
/**
* ServiceMiddleware is used to implement interceptor logic around API calls. This
* can be used, for example, to implement retry policies on service calls,
* logging, telemetry, or authentication and authorization. ServiceMiddleware can
* be applied to both RPC services and pub/sub scopes.
*/
public interface ServiceMiddleware {
/**
* Returns an InvocationHandler which proxies the given target. This can be used to apply middleware
* logic around a service call.
*
* @param next the next target in the call chain.
* @param the handler type.
* @return proxied InvocationHandler.
*/
InvocationHandler apply(T next);
}