119 lines
3.9 KiB
Java
119 lines
3.9 KiB
Java
package eu.dnetlib.enabling.tools;
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import java.io.StringReader;
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import java.io.StringWriter;
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import java.util.Map;
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import javax.annotation.Resource;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.ws.wsaddressing.W3CEndpointReference;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathConstants;
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import javax.xml.xpath.XPathFactory;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.w3c.dom.Document;
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import org.w3c.dom.Element;
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import org.w3c.dom.NodeList;
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import org.xml.sax.InputSource;
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import com.google.common.collect.Maps;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
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import eu.dnetlib.soap.cxf.StandaloneCxfEndpointReferenceBuilder;
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@Deprecated
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public abstract class AbstractServiceLocator<T> implements ServiceLocator<T> {
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/**
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* lookup locator.
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*/
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@Resource(name="lookupLocator")
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private ServiceLocator<ISLookUpService> lookUpLocator;
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/**
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* build epr.
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*/
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@Resource
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private StandaloneCxfEndpointReferenceBuilder eprBuilder;
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/**
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* service resolver. used to create proxies for discovered services.
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*/
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@Resource(name="serviceResolver")
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private ServiceResolver serviceResolver;
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(AbstractServiceLocator.class); // NOPMD by marko on 11/24/08 5:02 PM
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@Override
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public T getService(final String profileId, final Class<T> clazz) {
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final String profile = executeQuery(profileId, null);
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try {
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final XPathFactory factory = XPathFactory.newInstance();
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final XPath xpath = factory.newXPath();
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final DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
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final DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
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final Document doc = docBuilder.parse(new InputSource(new StringReader(profile)));
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final String url = xpath.evaluate("//url", doc);
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final String serviceId = xpath.evaluate("//id", doc);
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final NodeList propElements = (NodeList) xpath.evaluate("//PROPERTY", doc, XPathConstants.NODESET);
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final Map<String, String> props = Maps.newHashMap();
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for (int i = 0; i < propElements.getLength(); i++) {
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Element propElement = (Element) propElements.item(i);
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props.put(propElement.getAttribute("key"), propElement.getAttribute("value"));
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}
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final W3CEndpointReference epr = eprBuilder.getEndpointReference(url, null, null, url + "?wsdl", null, null);
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final ServiceRunningInstance<T> instance = new ServiceRunningInstance<T>(epr, serviceId, url, props);
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return serviceResolver.getService(clazz, instance.getEpr());
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} catch(Exception e) {
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log.error("cannot instantiate service from id: " + profileId, e);
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throw new IllegalStateException("cannot instantiate service from id: " + profileId, e);
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}
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}
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@Override
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public String getServiceId(final String profileId) {
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return executeQuery(profileId, "/RESOURCE_PROFILE/HEADER/RESOURCE_IDENTIFIER/@value/string()");
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}
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private String executeQuery(final String profileId, final String xpath) {
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final StringWriter sw = new StringWriter();
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sw.append("let $uri:=/RESOURCE_PROFILE/HEADER[./RESOURCE_IDENTIFIER/@value='");
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sw.append(profileId);
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sw.append("']/RESOURCE_URI/@value/string()");
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sw.append("\n\n");
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sw.append("for $x in collection('/db/DRIVER/ServiceResources')/RESOURCE_PROFILE/HEADER");
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sw.append("\n");
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sw.append("where $x/RESOURCE_PROFILE/HEADER/RESOURCE_URI/@value = $uri");
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sw.append("\n");
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sw.append("return $x");
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if (xpath != null) {
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sw.append(xpath);
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}
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final String xq = sw.toString();
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try {
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return lookUpLocator.getService().getResourceProfileByQuery(xq);
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} catch (ISLookUpException e) {
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log.error("cannot locate service using query: " + xq, e);
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throw new IllegalStateException("cannot locate service using query: " + xq, e);
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}
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}
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} |