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Fetcher.java
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Fetcher.java
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/*
* Copyright 2018 Preferred.AI
*
* 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 ai.preferred.venom.fetcher;
import ai.preferred.venom.request.Request;
import ai.preferred.venom.response.Response;
import javax.validation.constraints.NotNull;
import java.util.concurrent.Future;
/**
* This interface represents only the most basic of fetching a request.
* It imposes no restrictions or particular details on the request execution process
* and leaves the specifics of proxy management, validation and response status handling
* up to individual implementations.
*
* @author Maksim Tkachenko
* @author Truong Quoc Tuan
* @author Ween Jiann Lee
*/
public interface Fetcher extends AutoCloseable {
/**
* Fetcher starter.
*/
void start();
/**
* Fetch the desired HTTP page given in {@link Request}.
*
* @param request information for the page to fetch.
* @return Response future
*/
@NotNull
Future<Response> fetch(@NotNull Request request);
/**
* Fetch the desired HTTP page given in {@link Request}. Executes
* callback upon completion.
*
* @param request information for the page to fetch.
* @param callback callback
* @return Response future
*/
@NotNull
Future<Response> fetch(@NotNull Request request, @NotNull Callback callback);
}