ja, dann ist es möglich, und Ihr Code aussehen wird dieses
import com.ibm.watson.developer_cloud.discovery.v1.Discovery;
import com.ibm.watson.developer_cloud.discovery.v1.model.QueryOptions;
import com.ibm.watson.developer_cloud.discovery.v1.model.QueryResponse;
public class DiscoveryNewsDemo {
public static void main(String[] args) {
Discovery discovery = new Discovery("2017-09-01");
discovery.setEndPoint("https://gateway.watsonplatform.net/discovery/api/");
discovery.setUsernameAndPassword("<username>", "<password>"); //replace with the appropriate values here
String environmentId = "system";
String collectionId = "news";
QueryOptions queryOptions = new QueryOptions.Builder(environmentId, collectionId)
.query("IBM,language:(english|en)")
.filter("crawl_date>2017-06-26T12:00:00-0400,crawl_date<2017-08-26T12:00:00-0400")
.count(5)
.addReturnField("title")
.addReturnField("url")
.addReturnField("host")
.addReturnField("crawl_date")
.build();
QueryResponse queryResponse = discovery.query(queryOptions).execute();
System.out.println(queryResponse);
}
}
jedoch beachten Sie bitte, dass Discovery News nur die letzten 90 Tage Daten scheint zu halten, so dass die meisten wahrscheinlich werden Sie ersetzen müssen
.filter("crawl_date>2017-06-26T12:00:00-0400,crawl_date<2017-08-26T12:00:00-0400")
mit etwas jüngeren (ich schreibe diese Antwort in 27. November 2017) wie
.filter("crawl_date>2017-10-26T12:00:00-0400,crawl_date<2017-11-26T12:00:00-0400")
Wenn Sie Maven verwenden, müssen Sie diese Abhängigkeit hinzufügen
...
<dependencies>
<dependency>
<groupId>com.ibm.watson.developer_cloud</groupId>
<artifactId>discovery</artifactId>
<version>4.0.0</version>
</dependency>
</dependencies>
...
Leider Discovery News Dokumentation nicht explizit angeben, wie Sie den Standard-Systemnachrichten Daten-Repository zugreifen können, hier der Trick ist, um diese Werte zu verwenden
...
String environmentId = "system";
String collectionId = "news";
QueryOptions queryOptions = new QueryOptions.Builder(environmentId, collectionId)
...
Es Ergebnisse angezeigt werden wie folgt
Nov 27, 2017 8:29:04 AM okhttp3.internal.platform.Platform log
INFO: --> GET https://gateway.watsonplatform.net/discovery/api/v1/environments/system/collections/news/query?version=2017-09-01&filter=crawl_date%3E2017-10-26T12:00:00-0400,crawl_date%3C2017-11-26T12:00:00-0400&query=IBM,language:(english%7Cen)&count=5&return=title,url,host,crawl_date http/1.1
Nov 27, 2017 8:29:06 AM okhttp3.internal.platform.Platform log
INFO: <-- 200 OK https://gateway.watsonplatform.net/discovery/api/v1/environments/system/collections/news/query?version=2017-09-01&filter=crawl_date%3E2017-10-26T12:00:00-0400,crawl_date%3C2017-11-26T12:00:00-0400&query=IBM,language:(english%7Cen)&count=5&return=title,url,host,crawl_date (1912ms, unknown-length body)
{
"matching_results": 19922,
"results": [
{
"score": 3.2059636,
"host": "mcts-mcitp.com",
"crawl_date": "2017-11-18T06:41:05Z",
"id": "txAkTtulpLhTd6FqrCCqWhiXfaQFLOz8SQBH7DiC2FqGwOIDPl4udzDBV0_6p0xK",
"title": "C9020-667 IBM New Workloads Sales V1",
"url": "http://www.mcts-mcitp.com/2017/11/17/c9020-667-ibm-new-workloads-sales-v1/"
},
{
"score": 3.1392605,
"host": "developer.com",
"crawl_date": "2017-11-03T00:38:21Z",
"id": "h1kKQlSfPKM3guslW9wfVJyyvWoTDv8UHdOksDaqCEC3CV3Ya8sWl6JXDgn02yMN",
"title": "IBM Renames Its Cloud Computing Service",
"url": "https://www.developer.com/daily_news/ibm-renames-its-cloud-computing-service.html"
},
{
"score": 3.0926523,
"host": "prominic.net",
"crawl_date": "2017-10-30T22:08:03Z",
"id": "S94YGfvGGL3K84j2i75GmvcSfxJRu9b7CS73vSncmYr3gHBObjbLF7rziVtdOkJn",
"title": "Prominic.NET Offers Free Hosting to IBM Champions - Prominic.NET",
"url": "https://prominic.net/2017/05/08/prominic-net-offers-free-hosting-ibm-champions/"
},
{
"score": 3.0866172,
"host": "mcts-mcitp.com",
"crawl_date": "2017-11-16T00:32:11Z",
"id": "KG6QUpkwnv02cD0oi2EN_dSCpcpbfi3JtuIjULVER1cWtxVZ77bV8vWkaHY5atsW",
"title": "C9020-662 IBM Virtualized Storage V1",
"url": "http://www.mcts-mcitp.com/2017/11/15/c9020-662-ibm-virtualized-storage-v1/"
},
{
"score": 3.0718818,
"host": "techrepublic.com",
"crawl_date": "2017-11-10T15:42:00Z",
"id": "qgFND-rmtO0F5xkZLqbam-Di2vdjQ2iIkeTR8DqR3vNgturI2AuPJn6sDI_mz_Ct",
"title": "Conjure VR objects with your voice, using new IBM Watson service - Video | ZDNet",
"url": "http://www.techrepublic.com/videos/conjure-vr-objects-with-your-voice-using-new-ibm-watson-service/"
}
]
}