MaDgIK
/
uoa-validator-api
13
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

added dynamic endpoint route for ListSets. Need to aggregate and serve JSON

This commit is contained in:
Katerina 2023-06-27 10:58:55 +03:00
parent ce4d729185
commit e61e252306
4 changed files with 231 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
pom.xml
View File

@ -89,7 +89,55 @@
<artifactId>camel-spring-boot-starter</artifactId>
<version>${apache.camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-jackson-starter</artifactId>
<version>${apache.camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jackson</artifactId>
<version>${apache.camel.version}</version> <!-- Use the appropriate version -->
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jacksonxml</artifactId>
<version>${apache.camel.version}</version>
<!-- use the same version as your Camel core version -->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.15.2</version> <!-- Use the appropriate version -->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.15.2</version> <!-- Use the appropriate version -->
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.15.2</version> <!-- Use the appropriate version -->
</dependency>
<dependency>
<groupId>org.apache.camel.springboot</groupId>
<artifactId>camel-servlet-starter</artifactId>
<version>${apache.camel.version}</version>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-http</artifactId>
<version>${apache.camel.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.15.2</version>
</dependency>
</dependencies>
<build>

26
src/main/java/eu/dnetlib/validatorapi/controllers/ValidationController.java
View File

@ -13,6 +13,7 @@ import eu.dnetlib.validatorapi.repositories.ValidationResultRepository;
import eu.dnetlib.validatorapi.routes.OaiPmhRoute;
import eu.dnetlib.validatorapi.routes.OaiSetListRoute;
import org.apache.camel.CamelContext;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@ -233,14 +234,29 @@ public class ValidationController {
}
}
@RequestMapping(value = {"/getSets"}, method = RequestMethod.GET)
public void getSets(@RequestParam(name = "baseUrl", defaultValue = "http://repositorium.sdum.uminho.pt/oai/request") String baseURL //not in use now
@RequestMapping(value = {"/getSets"}, method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public String getSets(@RequestParam(name = "baseUrl", defaultValue = "http://repositorium.sdum.uminho.pt/oai/request") String baseURL //not in use now
) throws Exception {
RouteBuilder listSetsBuilder = new OaiSetListRoute();
ProducerTemplate producerTemplate = camelContext.createProducerTemplate();
String response = producerTemplate.requestBodyAndHeader("direct:getResponse", null, "endpoint", "oaipmh://"+ baseURL + "?verb=ListSets", String.class);
return response;
/*
System.out.println(camelContext.getRoutes());
RouteBuilder listSetsBuilder = new OaiSetListRoute("oaipmh://"+ baseURL + "?verb=ListSets");
if(camelContext.getRoutes().size()<1)
camelContext.addRoutes(listSetsBuilder);
camelContext.getRouteController().startRoute("oaiSetListRoute");
camelContext.getRouteController().stopRoute("oaiSetListRoute");
System.out.println(((OaiSetListRoute) listSetsBuilder).xml);
System.out.println(camelContext.getRoutes());
/*camelContext.getRouteController().startRoute("oaiSetListRoute");
camelContext.getRouteController().stopRoute("oaiSetListRoute");*/
/* ProducerTemplate template = camelContext.createProducerTemplate();
String response = template.requestBody("direct:getResponse", null, String.class);
return response;
*/
//System.out.println(((OaiSetListRoute) listSetsBuilder).xml);
}
@RequestMapping(value = {"/demo"}, produces = MediaType.APPLICATION_JSON_VALUE, method = RequestMethod.POST)
public String demo() {

74
src/main/java/eu/dnetlib/validatorapi/routes/OaiSetListRoute.java
View File

@ -1,24 +1,80 @@
package eu.dnetlib.validatorapi.routes;
import eu.dnetlib.validatorapi.utils.ListSetAggregationStrategy;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.model.dataformat.JacksonXMLDataFormat;
import org.springframework.stereotype.Component;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.ArrayList;
@Component
public class OaiSetListRoute extends RouteBuilder {
private final String oaiEndpoint;
/*private final String oaiEndpoint;*/
public String xml = new String();
public OaiSetListRoute(final String oaiEndpoint) {
/*public OaiSetListRoute(final String oaiEndpoint) {
this.oaiEndpoint = oaiEndpoint;
}
}*/
@Override
public void configure() throws Exception {
/* from(oaiEndpoint).process(exchange -> {
// System.out.println(exchange.getIn().getBody(String.class));
xml+=exchange.getIn().getBody(String.class)+"\n\n Katerina \n\n";
});*/
JacksonXMLDataFormat xmlJsonFormat = new JacksonXMLDataFormat();
from(oaiEndpoint)
from("direct:getResponse")
.process(exchange -> {
// Get the endpoint URL from the request parameter
String endpoint = exchange.getIn().getHeader("endpoint", String.class);
// Set the dynamic endpoint URL in the exchange header
exchange.getIn().setHeader("dynamicEndpoint", endpoint);
})
.recipientList(header("dynamicEndpoint"));
//.to("direct:processSets");
from("direct:processSets")
.process(exchange -> {
// Access the individual response from the ArrayList
ArrayList<?> responseList = exchange.getIn().getBody(ArrayList.class);
InputStream responseStream = new ByteArrayInputStream(responseList.get(0).toString().getBytes());
// Set the converted InputStream as the new body
exchange.getIn().setBody(responseStream);
})
.split(xpath("//set")).log("${body}")
.aggregate(constant(true), new ListSetAggregationStrategy())
.completionPredicate(exchangeProperty(Exchange.AGGREGATED_SIZE).isEqualTo(header("CamelSplitSize")))
.to("direct:processAggregatedSets").log("Aggregated: ${body}");
/*
.aggregate(header("dynamicEndpoint"), new ListSetAggregationStrategy())
.completionPredicate(exchangeProperty(Exchange.AGGREGATED_SIZE).isEqualTo(header("CamelSplitSize")))
.marshal().json(JsonLibrary.Jackson)
.convertBodyTo(String.class)
.log("Aggregated Response: ${body}");*/
}
/*from("direct:getResponse")
.to("oaipmh:http://repositorium.sdum.uminho.pt/oai/request?verb=ListSets")
.process(exchange -> {
// Process the API response
String apiResponse = exchange.getIn().getBody(String.class);
// Create a new response
String newResponse = "New Response: I made it!";
// Set the new response in the exchange body
exchange.getIn().setBody(newResponse);
});*/
/* from(oaiEndpoint)
.convertBodyTo(String.class) // Convert response to String
.marshal().json() // Convert String to JSON
.to("direct:serveResponse")
@ -31,5 +87,5 @@ public class OaiSetListRoute extends RouteBuilder {
.setBody(simple("${body}")) // Set the response body
.log("${body}")
.to("mock:result"); // Replace 'mock:result' with the appropriate endpoint to serve the response
}
}*/
}

97
src/main/java/eu/dnetlib/validatorapi/utils/ListSetAggregationStrategy.java Normal file
View File

@ -0,0 +1,97 @@
package eu.dnetlib.validatorapi.utils;
import org.apache.camel.AggregationStrategy;
import org.apache.camel.Exchange;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.xpath.*;
import java.io.IOException;
import java.io.StringReader;
public class ListSetAggregationStrategy implements AggregationStrategy {
public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
if (oldExchange == null) {
return newExchange;
}
String oldBody = null;
try {
oldBody = exctractSets(oldExchange.getIn().getBody(String.class));
String newBody = exctractSets(newExchange.getIn().getBody(String.class));
oldExchange.getIn().setBody(oldBody + newBody);
} catch (ParserConfigurationException e) {
System.out.println(e);
e.printStackTrace();
} catch (IOException e) {
System.out.println(e);
e.printStackTrace();
} catch (SAXException e) {
System.out.println(e);
e.printStackTrace();
} catch (TransformerException e) {
System.out.println(e);
e.printStackTrace();
} catch (XPathExpressionException e) {
System.out.println(e);
e.printStackTrace();
}
return oldExchange;
}
private String exctractSets(String xml) throws ParserConfigurationException, IOException, SAXException, TransformerException, XPathExpressionException {
// Create an XPathFactory
XPathFactory xfactory = XPathFactory.newInstance();
// Create an XPath object
XPath xpath = xfactory.newXPath();
// Compile the XPath expression to select the set elements
XPathExpression expression = xpath.compile("//set");
// Create an InputSource from the XML string
InputSource inputSource = new InputSource(new StringReader(xml));
// Parse the inputSource and create a Document object
Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(inputSource);
// Evaluate the XPath expression on the document
NodeList setElements = (NodeList) expression.evaluate(document, XPathConstants.NODESET);
// Process the extracted set elements
StringBuilder extractedElements = new StringBuilder();
for (int i = 0; i < setElements.getLength(); i++) {
extractedElements.append(getElementAsString(setElements.item(i)));
}
// System.out.println(extractedElements.toString());
return extractedElements.toString();
}
// Helper method to convert a Node to String
private static String getElementAsString(Node node) {
try {
javax.xml.transform.TransformerFactory tf = javax.xml.transform.TransformerFactory.newInstance();
javax.xml.transform.Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION, "yes");
java.io.StringWriter writer = new java.io.StringWriter();
transformer.transform(new javax.xml.transform.dom.DOMSource(node), new javax.xml.transform.stream.StreamResult(writer));
return writer.toString();
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
}