eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/store/CdmStoreConnector.java

   1 // $Id$
   2 /**
   3  * Copyright (C) 2007 EDIT
   4  * European Distributed Institute of Taxonomy
   5  * http://www.e-taxonomy.eu
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version 1.1
   8  * See LICENSE.TXT at the top of this package for the full license terms.
   9  */
  10
  11 package eu.etaxonomy.taxeditor.store;
  12
  13 import java.sql.SQLException;
  14 import java.util.concurrent.CancellationException;
  15
  16 import org.eclipse.core.runtime.IProgressMonitor;
  17 import org.eclipse.core.runtime.IStatus;
  18 import org.eclipse.core.runtime.Status;
  19 import org.eclipse.core.runtime.jobs.Job;
  20 import org.eclipse.swt.widgets.Display;
  21 import org.hibernate.collection.internal.AbstractPersistentCollection;
  22 import org.hibernate.proxy.AbstractLazyInitializer;
  23 import org.springframework.core.io.Resource;
  24
  25 import eu.etaxonomy.cdm.api.application.CdmApplicationController;
  26 import eu.etaxonomy.cdm.api.application.CdmApplicationRemoteController;
  27 import eu.etaxonomy.cdm.api.application.ICdmApplicationConfiguration;
  28 import eu.etaxonomy.cdm.config.ICdmSource;
  29 import eu.etaxonomy.cdm.remote.ICdmRemoteSource;
  30 import eu.etaxonomy.cdm.config.CdmSourceException;
  31 import eu.etaxonomy.cdm.database.DatabaseTypeEnum;
  32 import eu.etaxonomy.cdm.database.DbSchemaValidation;
  33 import eu.etaxonomy.cdm.database.ICdmDataSource;
  34 import eu.etaxonomy.cdm.model.metadata.CdmMetaData;
  35 import eu.etaxonomy.cdm.model.metadata.CdmMetaData.MetaDataPropertyName;
  36 import eu.etaxonomy.taxeditor.model.CdmProgressMonitorAdapter;
  37 import eu.etaxonomy.taxeditor.ui.dialog.LoginDialog;
  38 import eu.etaxonomy.taxeditor.view.datasource.CdmDataSourceViewPart;
  39
  40 /**
  41  * @author n.hoffmann
  42  * @created Dec 8, 2010
  43  * @version 1.0
  44  */
  45 class CdmStoreConnector extends Job {
  46         private final Display display;
  47         private final ICdmSource cdmSource;
  48         private DbSchemaValidation dbSchemaValidation;
  49         private final Resource applicationContextBean;
  50
  51         /**
  52          * @param datasource
  53          * @param dbSchemaValidation
  54          * @param applicationContextBean
  55          */
  56         public CdmStoreConnector(Display display, ICdmSource cdmSource,
  57                         DbSchemaValidation dbSchemaValidation,
  58                         Resource applicationContextBean) {
  59                 super("Connecting to datasource: " + cdmSource);
  60                 this.display = display;
  61                 this.cdmSource = cdmSource;
  62                 this.dbSchemaValidation = dbSchemaValidation;
  63                 this.applicationContextBean = applicationContextBean;
  64         }
  65
  66         @Override
  67         public IStatus run(final IProgressMonitor monitor) {
  68
  69                 monitor.beginTask(getConnectionMessage(), 10);
  70
  71                 // check if database is up and running
  72                 checkDatabaseReachable(monitor);
  73
  74                 if (!monitor.isCanceled()) {
  75                         // check if the datasource actually holds data
  76                         checkIsNonEmptyCdmDatabase(monitor);
  77                 }
  78
  79                 if (dbSchemaValidation != DbSchemaValidation.CREATE
  80                                 && !monitor.isCanceled()) {
  81                         // if we do not create the datasource, we want to check if the
  82                         // datasource is compatible with this editor
  83                         checkDbSchemaVersionCompatibility(monitor);
  84                 }
  85
  86                 // we are done with our low level checking and will free resources now
  87                 cdmSource.closeOpenConnections();
  88
  89                 if (!monitor.isCanceled()) {
  90                         CdmStore.close(monitor);
  91                 }
  92
  93                 ICdmApplicationConfiguration applicationController = null;
  94
  95                 if (!monitor.isCanceled()) {
  96                         CdmProgressMonitorAdapter subprogressMonitor = CdmProgressMonitorAdapter
  97                                         .CreateSubMonitor(monitor, 7);
  98                         // This is where we instantiate the application controller
  99                         try {
 100
 101                                 applicationController = getApplicationController(cdmSource,subprogressMonitor);
 102
 103                         } catch (Exception e) {
 104                                 if(! causeIsCancelationExceptionRecursive(e)){
 105                                         return new Status(IStatus.ERROR, "Could not connect to CDM Store", "An error occurred while trying to connect to datasource: " + cdmSource.getName(), e);
 106                                 }
 107                         } finally {
 108                                 monitor.done();
 109                         }
 110                 }
 111
 112
 113
 114                 if (!monitor.isCanceled()) {
 115                         CdmStore.setInstance(applicationController, cdmSource);
 116
 117                         display.asyncExec(new Runnable() {
 118                                 /*
 119                                  * (non-Javadoc)
 120                                  *
 121                                  * @see java.lang.Runnable#run()
 122                                  */
 123                                 @Override
 124                                 public void run() {
 125                                         authenticate();
 126
 127                                         startContext();
 128                                 }
 129                         });
 130
 131                         StoreUtil.info("Application context initialized.");
 132                         return Status.OK_STATUS;
 133                 } else {
 134                         // Show datasource view if not shown yet
 135                         display.asyncExec(new Runnable() {
 136                                 /*
 137                                  * (non-Javadoc)
 138                                  *
 139                                  * @see java.lang.Runnable#run()
 140                                  */
 141                                 @Override
 142                                 public void run() {
 143                                         StoreUtil.showView(CdmDataSourceViewPart.ID);
 144                                 }
 145                         });
 146                         return Status.CANCEL_STATUS;
 147                 }
 148
 149         }
 150
 151         private ICdmApplicationConfiguration getApplicationController(ICdmSource cdmSource, CdmProgressMonitorAdapter subprogressMonitor) {
 152                 if(cdmSource instanceof ICdmDataSource) {
 153                         return  CdmApplicationController.NewInstance(applicationContextBean,
 154                                         (ICdmDataSource)cdmSource,
 155                                         dbSchemaValidation,
 156                                         false,
 157                                         subprogressMonitor);
 158                 } else if(cdmSource instanceof ICdmRemoteSource) {
 159                         return CdmApplicationRemoteController.NewInstance(applicationContextBean,
 160                                                         (ICdmRemoteSource)cdmSource,
 161                                                         false,
 162                                                         subprogressMonitor,
 163                                                         null);
 164                 } else {
 165                         throw new UnsupportedOperationException("Cannot create application controller for " + cdmSource.getName());
 166                 }
 167         }
 168         private void authenticate() {
 169                 LoginDialog loginDialog = new LoginDialog(StoreUtil.getShell());
 170                 loginDialog.open();
 171         }
 172
 173         private void startContext() {
 174                 CdmStore.getContextManager().notifyContextStart();
 175         }
 176
 177         /**
 178          * @return
 179          */
 180         private String getConnectionMessage() {
 181                 return cdmSource.getConnectionMessage();
 182         }
 183
 184         /**
 185          * @return
 186          * @throws SQLException
 187          */
 188         private void checkDbSchemaVersionCompatibility(IProgressMonitor monitor) {
 189                 monitor.subTask("Checking if datasource is compatible with this editor.");
 190                 String dbSchemaVersion;
 191                 boolean result = false;
 192                 try {
 193                         dbSchemaVersion = cdmSource.getDbSchemaVersion();
 194                         // we assume that empty dbSchemaVersion means an empty database and
 195                         // skip version checking
 196                         result = dbSchemaVersion == null ? true : CdmMetaData
 197                                         .isDbSchemaVersionCompatible(dbSchemaVersion);
 198                         monitor.worked(1);
 199                 } catch (CdmSourceException e) {
 200                         //
 201                 }
 202
 203                 if (!result) {
 204                         // Show an error message
 205                         StoreUtil
 206                                         .errorDialog(
 207                                                         "DatabaseCompatibilityCheck failed",
 208                                                         this,
 209                                                         "The database schema for the chosen "
 210                                                                         + "datasource '"
 211                                                                         + cdmSource
 212                                                                         + "' \n is not valid for this version of the taxonomic editor. \n"
 213                                                                         + "Please update the chosen datasource or choose a new data source to connect to in the Datasource View.",
 214                                                         null);
 215
 216                         monitor.setCanceled(true);
 217                 }
 218
 219         }
 220
 221         private void checkIsNonEmptyCdmDatabase(IProgressMonitor monitor) {
 222                 monitor.subTask("Checking if datasource is a non empty CDM database.");
 223                 boolean isDbEmpty = false;
 224                 try {
 225                         isDbEmpty = cdmSource.isDbEmpty();
 226                 } catch (CdmSourceException e) {
 227                         isDbEmpty = true;
 228                 }
 229                 if(isDbEmpty) {
 230                         dbSchemaValidation = DbSchemaValidation.CREATE;
 231                 }
 232         }
 233
 234         private boolean causeIsCancelationExceptionRecursive(Throwable throwable){
 235                 if(throwable == null){
 236                         return false;
 237                 }else if(throwable instanceof CancellationException){
 238                         return true;
 239                 }else{
 240                         return causeIsCancelationExceptionRecursive(throwable.getCause());
 241                 }
 242         }
 243
 244         private void checkDatabaseReachable(IProgressMonitor monitor) {
 245                 try {
 246                         monitor.subTask("Checking if datasource is reachable.");
 247                         cdmSource.checkConnection();
 248                         monitor.worked(1);
 249                 } catch (CdmSourceException e) {
 250                         StoreUtil.errorDialog("Could not connect to chosen datasource",
 251                                         this, "Reason: " + e.getMessage(), e);
 252                         monitor.setCanceled(true);
 253                 }
 254         }
 255 }