Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 372:fc3cf0ef777e
Added meta data service.
flys-artifacts/trunk@1781 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
---|---|
date | Fri, 29 Apr 2011 15:10:44 +0000 |
parents | |
children | 7c018f466d6d |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java Fri Apr 29 15:10:44 2011 +0000 @@ -0,0 +1,105 @@ +package de.intevation.flys.artifacts.services; + +import java.io.InputStream; +import java.io.IOException; + +import java.sql.Connection; +import java.sql.SQLException; + +import org.w3c.dom.Document; + +import org.apache.log4j.Logger; + +import de.intevation.artifacts.CallMeta; +import de.intevation.artifacts.ServiceFactory; + +import de.intevation.artifactdatabase.DefaultService; + +import de.intevation.artifacts.common.utils.XMLUtils; + +import de.intevation.flys.artifacts.services.meta.Builder; + +import de.intevation.flys.backend.SessionHolder; + +import org.hibernate.Session; + +import org.hibernate.jdbc.Work; + +public class MetaDataService +extends DefaultService +{ + private static Logger log = Logger.getLogger(MetaDataService.class); + + public static final String META_DATA_TEMPLATE = "/metadata/template.xml"; + + protected Builder builder; + + public MetaDataService() { + } + + @Override + public Document process( + Document data, + Object globalContext, + CallMeta callMeta + ) { + log.debug("MetaDataService.process"); + + final Document result = XMLUtils.newDocument(); + + if (builder == null) { + log.error("MetaDataService is not setup properly."); + return result; + } + + Session session = SessionHolder.acquire(); + try { + session.doWork(new Work() { + @Override + public void execute(Connection connection) + throws SQLException + { + log.debug("MetaDataService.execute"); + builder.build(connection, result); + } + }); + } + finally { + session.close(); + SessionHolder.release(); + } + + return result; + } + + @Override + public void setup(ServiceFactory factory, Object globalContext) { + log.debug("MetaDataService.setup"); + + InputStream in = getClass().getResourceAsStream(META_DATA_TEMPLATE); + + if (in == null) { + log.error("cannot get template resource"); + return; + } + + try { + Document template = XMLUtils.parseDocument(in); + if (template == null) { + log.error("cannot parse meta data template"); + } + else { + builder = new Builder(template); + } + } + finally { + try { + in.close(); + } + catch (IOException ioe) { + log.error(ioe); + } + } + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :