87 lines
2.6 KiB
Java
87 lines
2.6 KiB
Java
package org.gcube.common.scope.impl;
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import java.net.URL;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.regex.Pattern;
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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.scope.api.ServiceMap;
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import org.reflections.Reflections;
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import org.reflections.scanners.ResourcesScanner;
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import org.reflections.util.ClasspathHelper;
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import org.reflections.util.ConfigurationBuilder;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Scans the classpath for {@link ServiceMap}s.
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*
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* @author Fabio Simeoni
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*
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*/
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class ServiceMapScanner {
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private static Logger log = LoggerFactory.getLogger(ServiceMapScanner.class);
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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 mapConfigPattern = ".*\\.servicemap";
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/**
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* Scans the classpath for {@link ServiceMap}s.
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*/
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static Map<String, ServiceMap> maps() {
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log.info("scanning form maps");
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Map<String, ServiceMap> maps = new HashMap<String, ServiceMap>();
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try {
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Collection<URL> urls = ClasspathHelper.forJavaClassPath();
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ConfigurationBuilder reflectionConf = new ConfigurationBuilder().addUrls(ClasspathHelper.forJavaClassPath()).addUrls(ClasspathHelper.forClassLoader()).setScanners(new ResourcesScanner());
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Reflections reflection = new Reflections(reflectionConf);
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JAXBContext context = JAXBContext.newInstance(DefaultServiceMap.class);
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Set<String> resources = reflection.getResources(Pattern.compile(".*\\.servicemap"));
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log.info("loading {} ", resources);
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Unmarshaller um = context.createUnmarshaller();
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for (String resource: resources) {
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log.info("loading {} ", resource);
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URL url = Thread.currentThread().getContextClassLoader().getResource(resource);
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DefaultServiceMap map = (DefaultServiceMap) um.unmarshal(url);
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ServiceMap current = maps.get(map.scope());
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if (current != null && current.version() != null)
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if (current.version().compareToIgnoreCase(map.version()) == 1) {
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log.warn("discarding {} because older (v.{}) than one previously loaded (v.{}) for {} ",
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new Object[] { url, map.version(), current.version(), map.scope() });
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continue;
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} else
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log.info("overwriting older map (v.{}) with newer map (v.{}) for {} ",
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new Object[] { current.version(), map.version(), map.scope() });
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maps.put(map.scope(), map);
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}
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} catch (Throwable e) {
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log.error("errror scanning service amps",e);
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throw new RuntimeException("could not load service maps", e);
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}
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return maps;
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}
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}
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