org.streampipes.manager.endpoint.EndpointItemFetcher Maven / Gradle / Ivy
/*
* Copyright 2018 FZI Forschungszentrum Informatik
*
* 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 org.streampipes.manager.endpoint;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import org.apache.http.client.fluent.Request;
import org.apache.http.message.BasicHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.streampipes.model.client.endpoint.RdfEndpoint;
import org.streampipes.model.client.endpoint.RdfEndpointItem;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.core.MediaType;
public class EndpointItemFetcher {
Logger logger = LoggerFactory.getLogger(EndpointItemFetcher.class);
private List rdfEndpoints;
public EndpointItemFetcher(List rdfEndpoints) {
this.rdfEndpoints = rdfEndpoints;
}
public List getItems() {
List endpointItems = new ArrayList<>();
rdfEndpoints.forEach(e -> endpointItems.addAll(getEndpointItems(e)));
return endpointItems;
}
private List getEndpointItems(RdfEndpoint e) {
try {
String result = Request.Get(e.getEndpointUrl())
.addHeader(new BasicHeader("Accept", MediaType.APPLICATION_JSON))
.execute()
.returnContent()
.asString();
return new Gson().fromJson(result, new TypeToken>(){}.getType());
} catch (IOException e1) {
logger.warn("Processing Element Descriptions could not be fetched from RDF endpoint: " + e.getEndpointUrl(), e1);
return new ArrayList<>();
}
}
}