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#631 - Partial Response : Implement video partial response consuming client.

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Gopinath Langote 2017-09-14 22:51:16 +05:30
parent 44e4b3c803
commit 711f3faf67
2 changed files with 76 additions and 1 deletions
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75
partial-response/src/main/java/com/iluwatar/partialresponse/VideoClientApp.java Normal file
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@ -0,0 +1,75 @@
/*
* The MIT License (MIT)
*
* Copyright (c) 2017 Gopinath Langote
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.iluwatar.partialresponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
/**
* The Partial response pattern is a design pattern in which client specifies fields to fetch to serve.
* Here {@link VideoClientApp} is playing as client for {@link VideoResource} server.
* Client ask for specific fields information in video to server.
* <p>
* <p>
* {@link VideoResource} act as server to serve video information.
*/
public class VideoClientApp {
private static final Logger LOGGER = LoggerFactory.getLogger(VideoClientApp.class);
/**
* Method as act client and request to server for video details.
*
* @param args program argument.
*/
public static void main(String[] args) throws Exception {
Map<Integer, Video> videos = new HashMap<>();
videos.put(1, new Video(1, "Avatar", 178, "epic science fiction film", "James Cameron", "English"));
videos.put(2, new Video(2, "Godzilla Resurgence", 120, "Action & drama movie|", "Hideaki Anno", "Japanese"));
videos.put(3, new Video(3, "Interstellar", 169, "Adventure & Sci-Fi", "Christopher Nolan", "English"));
FieldJsonMapper fieldJsonMapper = new FieldJsonMapper();
VideoResource videoResource = new VideoResource(fieldJsonMapper, videos);
LOGGER.info("Retrieving full response from server:-");
LOGGER.info("Get all video information:");
String videoDetails = videoResource.getDetails(1);
LOGGER.info(videoDetails);
LOGGER.info("----------------------------------------------------------");
LOGGER.info("Retrieving partial response from server:-");
LOGGER.info("Get video @id, @title, @director:");
String specificFieldsDetails = videoResource.getDetails(3, "id", "title", "director");
LOGGER.info(specificFieldsDetails);
LOGGER.info("Get video @id, @length:");
String videoLength = videoResource.getDetails(3, "id", "length");
LOGGER.info(videoLength);
}
}

2
partial-response/src/main/java/com/iluwatar/partialresponse/VideoResource.java
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@ -46,7 +46,7 @@ public class VideoResource {
/**
* @param id video id
* @param fields fields to get information about
* @return json of specified fields of particular video by id
* @return full response if no fields specified else partial response for given field.
*/
public String getDetails(Integer id, String... fields) throws Exception {
if (fields.length == 0) {