Mercurial > dive4elements > river
comparison 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 |
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| 371:dfbb3d50b0bd | 372:fc3cf0ef777e |
|---|---|
| 1 package de.intevation.flys.artifacts.services; | |
| 2 | |
| 3 import java.io.InputStream; | |
| 4 import java.io.IOException; | |
| 5 | |
| 6 import java.sql.Connection; | |
| 7 import java.sql.SQLException; | |
| 8 | |
| 9 import org.w3c.dom.Document; | |
| 10 | |
| 11 import org.apache.log4j.Logger; | |
| 12 | |
| 13 import de.intevation.artifacts.CallMeta; | |
| 14 import de.intevation.artifacts.ServiceFactory; | |
| 15 | |
| 16 import de.intevation.artifactdatabase.DefaultService; | |
| 17 | |
| 18 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 19 | |
| 20 import de.intevation.flys.artifacts.services.meta.Builder; | |
| 21 | |
| 22 import de.intevation.flys.backend.SessionHolder; | |
| 23 | |
| 24 import org.hibernate.Session; | |
| 25 | |
| 26 import org.hibernate.jdbc.Work; | |
| 27 | |
| 28 public class MetaDataService | |
| 29 extends DefaultService | |
| 30 { | |
| 31 private static Logger log = Logger.getLogger(MetaDataService.class); | |
| 32 | |
| 33 public static final String META_DATA_TEMPLATE = "/metadata/template.xml"; | |
| 34 | |
| 35 protected Builder builder; | |
| 36 | |
| 37 public MetaDataService() { | |
| 38 } | |
| 39 | |
| 40 @Override | |
| 41 public Document process( | |
| 42 Document data, | |
| 43 Object globalContext, | |
| 44 CallMeta callMeta | |
| 45 ) { | |
| 46 log.debug("MetaDataService.process"); | |
| 47 | |
| 48 final Document result = XMLUtils.newDocument(); | |
| 49 | |
| 50 if (builder == null) { | |
| 51 log.error("MetaDataService is not setup properly."); | |
| 52 return result; | |
| 53 } | |
| 54 | |
| 55 Session session = SessionHolder.acquire(); | |
| 56 try { | |
| 57 session.doWork(new Work() { | |
| 58 @Override | |
| 59 public void execute(Connection connection) | |
| 60 throws SQLException | |
| 61 { | |
| 62 log.debug("MetaDataService.execute"); | |
| 63 builder.build(connection, result); | |
| 64 } | |
| 65 }); | |
| 66 } | |
| 67 finally { | |
| 68 session.close(); | |
| 69 SessionHolder.release(); | |
| 70 } | |
| 71 | |
| 72 return result; | |
| 73 } | |
| 74 | |
| 75 @Override | |
| 76 public void setup(ServiceFactory factory, Object globalContext) { | |
| 77 log.debug("MetaDataService.setup"); | |
| 78 | |
| 79 InputStream in = getClass().getResourceAsStream(META_DATA_TEMPLATE); | |
| 80 | |
| 81 if (in == null) { | |
| 82 log.error("cannot get template resource"); | |
| 83 return; | |
| 84 } | |
| 85 | |
| 86 try { | |
| 87 Document template = XMLUtils.parseDocument(in); | |
| 88 if (template == null) { | |
| 89 log.error("cannot parse meta data template"); | |
| 90 } | |
| 91 else { | |
| 92 builder = new Builder(template); | |
| 93 } | |
| 94 } | |
| 95 finally { | |
| 96 try { | |
| 97 in.close(); | |
| 98 } | |
| 99 catch (IOException ioe) { | |
| 100 log.error(ioe); | |
| 101 } | |
| 102 } | |
| 103 } | |
| 104 } | |
| 105 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |