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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MetaDataService.java @ 372:fc3cf0ef777e

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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
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children 7c018f466d6d
rev   line source
372
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1 package de.intevation.flys.artifacts.services;
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2
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3 import java.io.InputStream;
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4 import java.io.IOException;
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5
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6 import java.sql.Connection;
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7 import java.sql.SQLException;
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8
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9 import org.w3c.dom.Document;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import de.intevation.artifacts.CallMeta;
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14 import de.intevation.artifacts.ServiceFactory;
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15
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16 import de.intevation.artifactdatabase.DefaultService;
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17
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.flys.artifacts.services.meta.Builder;
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21
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22 import de.intevation.flys.backend.SessionHolder;
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23
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24 import org.hibernate.Session;
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25
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26 import org.hibernate.jdbc.Work;
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27
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28 public class MetaDataService
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29 extends DefaultService
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30 {
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31 private static Logger log = Logger.getLogger(MetaDataService.class);
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32
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33 public static final String META_DATA_TEMPLATE = "/metadata/template.xml";
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34
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35 protected Builder builder;
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36
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37 public MetaDataService() {
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38 }
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39
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40 @Override
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41 public Document process(
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42 Document data,
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43 Object globalContext,
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44 CallMeta callMeta
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45 ) {
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46 log.debug("MetaDataService.process");
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47
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48 final Document result = XMLUtils.newDocument();
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49
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50 if (builder == null) {
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51 log.error("MetaDataService is not setup properly.");
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52 return result;
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53 }
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54
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55 Session session = SessionHolder.acquire();
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56 try {
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57 session.doWork(new Work() {
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58 @Override
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59 public void execute(Connection connection)
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60 throws SQLException
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61 {
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62 log.debug("MetaDataService.execute");
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63 builder.build(connection, result);
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64 }
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65 });
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66 }
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67 finally {
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68 session.close();
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69 SessionHolder.release();
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70 }
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71
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72 return result;
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73 }
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74
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75 @Override
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76 public void setup(ServiceFactory factory, Object globalContext) {
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77 log.debug("MetaDataService.setup");
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78
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79 InputStream in = getClass().getResourceAsStream(META_DATA_TEMPLATE);
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80
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81 if (in == null) {
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82 log.error("cannot get template resource");
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83 return;
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84 }
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85
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86 try {
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87 Document template = XMLUtils.parseDocument(in);
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88 if (template == null) {
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89 log.error("cannot parse meta data template");
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90 }
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91 else {
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92 builder = new Builder(template);
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93 }
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94 }
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95 finally {
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96 try {
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97 in.close();
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98 }
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99 catch (IOException ioe) {
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100 log.error(ioe);
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101 }
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102 }
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103 }
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104 }
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105 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org