add Bit.ly shortener

src/main/java/org/genesys2/server/service/impl/BitlyURLShortener.java

+package org.genesys2.server.service.impl;
+
+import org.genesys2.server.service.UrlShortenerService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestTemplate;
+
+import java.net.URL;
+import java.util.*;
+
+@Component("bitlyURLShortener")
+public class BitlyURLShortener implements UrlShortenerService {
+
+    private static final Logger LOG = LoggerFactory.getLogger(BitlyURLShortener.class);
+
+    @Value("${bitly.access.token}")
+    private String accessToken;
+
+    @Value("${bitly.group.guid}")
+    private String groupGuid;
+
+    @Value("${bitly.url.shortener}")
+    private String bitlyUrlShortener;
+
+    private RestTemplate restTemplate;
+
+    public BitlyURLShortener() {
+        this.restTemplate = new RestTemplate();
+    }
+
+    @Override
+    public String shortenUrl(URL url) {
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_JSON);
+        headers.set("Authorization" , accessToken);
+
+        Map<String, String> request = new HashMap<String, String>();
+        request.put("long_url", url.toString());
+        request.put("group_guid", groupGuid);
+
+        HttpEntity<Object> requestEntity = new HttpEntity<Object>(request, headers);
+
+        String shortenUrl = null;
+
+        try {
+            LinkedHashMap<String, String> linkedHashMap = restTemplate.postForObject(bitlyUrlShortener, requestEntity, LinkedHashMap.class);
+            shortenUrl = linkedHashMap.get("id");
+        } catch (final RestClientException e) {
+            LOG.error(e.getMessage(), e);
+        }
+
+        return shortenUrl;
+    }
+}

src/main/resources/application.properties

@@ -56,6 +56,12 @@ db.showSql=false
 db.hbm2ddl=false
 hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
 
+# bit.ly shortener
+# TODO change access token and guid
+bitly.access.token=xx
+bitly.group.guid=xx
+bitly.url.shortener=https://api-ssl.bitly.com/v4/shorten
+
 google.api.key=AIzaSyBEvPuc8j5ps5GDQ3tdnTJaffKhfOdxFVc
 google.url.shortener=https://www.googleapis.com/urlshortener/v1/url
 news.menu.abbreviate.length=22