91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
package org.gcube.common.authorization.library.enpoints;
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import java.net.URL;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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import javax.xml.bind.JAXBContext;
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import javax.xml.bind.Unmarshaller;
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import org.gcube.common.scan.ClasspathScanner;
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import org.gcube.common.scan.ClasspathScannerFactory;
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import org.gcube.common.scan.matchers.NameMatcher;
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import org.gcube.common.scan.resources.ClasspathResource;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class AuthorizationEndpointScanner {
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private static Logger log = LoggerFactory.getLogger(AuthorizationEndpointScanner.class);
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private static EndpointsContainer endpoints;
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/**
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* The path used to find service map configuration files.
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*/
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static final String configurationPattern = ".*\\.authorization";
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/**
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* Scans the classpath for AuthorizationEndpoints.
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*/
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public static synchronized EndpointsContainer endpoints() {
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if (endpoints==null || endpoints.getEndpoints().size()==0){
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log.trace("starting authorization endpoint retrieving");
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Map<String, AuthorizationEndpoint> endpointsMap = new HashMap<String, AuthorizationEndpoint>();
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try {
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JAXBContext context = JAXBContext.newInstance(AuthorizationEndpoint.class);
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Unmarshaller um = context.createUnmarshaller();
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String defaultInfrastructure = null;
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int defaultInfraPriority= Integer.MAX_VALUE;
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for (String r :getEnpointResourceNames()){
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URL url = Thread.currentThread().getContextClassLoader().getResource(r);
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AuthorizationEndpoint endpoint = (AuthorizationEndpoint)um.unmarshal(url);
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if (defaultInfrastructure==null)
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defaultInfrastructure = endpoint.getInfrastructure();
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if (!endpointsMap.containsKey(endpoint.getInfrastructure())
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|| endpointsMap.get(endpoint.getInfrastructure()).getPriority()> endpoint.getPriority()){
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if (r.startsWith("default") && endpoint.getPriority()<defaultInfraPriority ){
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defaultInfrastructure = endpoint.getInfrastructure();
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defaultInfraPriority = endpoint.getPriority();
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}
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endpointsMap.put(endpoint.getInfrastructure(), endpoint);
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}
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log.info("loaded endpoint {} ",endpoint.toString());
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}
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if (endpointsMap.size()==0)
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throw new Exception("no endpoints retreived");
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endpoints = new EndpointsContainer(endpointsMap, defaultInfrastructure);
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log.trace("authorization endpoint retrieving finished");
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} catch (Exception e) {
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throw new RuntimeException("could not load authorization endpoints", e);
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}
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}
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return endpoints;
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}
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private static Set<String> getEnpointResourceNames() {
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ClasspathScanner scanner = ClasspathScannerFactory.scanner();
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Set<String> names = new HashSet<String>();
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for (ClasspathResource r : scanner.scan(new NameMatcher(configurationPattern)))
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names.add(r.name());
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return names;
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}
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}
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