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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.store;
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import java.sql.SQLException;
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import java.util.concurrent.CancellationException;
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import org.eclipse.core.runtime.IProgressMonitor;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.core.runtime.Status;
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import org.eclipse.core.runtime.jobs.Job;
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import org.eclipse.swt.widgets.Display;
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import org.springframework.core.io.Resource;
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import eu.etaxonomy.cdm.api.application.CdmApplicationController;
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import eu.etaxonomy.cdm.api.application.CdmApplicationRemoteController;
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import eu.etaxonomy.cdm.api.application.ICdmApplicationConfiguration;
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import eu.etaxonomy.cdm.config.CdmSourceException;
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import eu.etaxonomy.cdm.config.ICdmSource;
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import eu.etaxonomy.cdm.database.DbSchemaValidation;
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import eu.etaxonomy.cdm.database.ICdmDataSource;
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import eu.etaxonomy.cdm.model.metadata.CdmMetaData;
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import eu.etaxonomy.cdm.remote.ICdmRemoteSource;
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import eu.etaxonomy.taxeditor.model.CdmProgressMonitorAdapter;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.ui.dialog.LoginDialog;
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import eu.etaxonomy.taxeditor.view.datasource.CdmDataSourceViewPart;
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/**
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* @author n.hoffmann
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* @created Dec 8, 2010
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* @version 1.0
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*/
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class CdmStoreConnector extends Job {
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private final Display display;
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private final ICdmSource cdmSource;
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private DbSchemaValidation dbSchemaValidation;
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private final Resource applicationContextBean;
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/**
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* @param datasource
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* @param dbSchemaValidation
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* @param applicationContextBean
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*/
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public CdmStoreConnector(Display display, ICdmSource cdmSource,
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DbSchemaValidation dbSchemaValidation,
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Resource applicationContextBean) {
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super("Connecting to datasource: " + cdmSource);
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this.display = display;
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this.cdmSource = cdmSource;
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this.dbSchemaValidation = dbSchemaValidation;
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this.applicationContextBean = applicationContextBean;
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}
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@Override
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public IStatus run(final IProgressMonitor monitor) {
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monitor.beginTask(getConnectionMessage(), 10);
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// check if database is up and running
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checkDatabaseReachable(monitor);
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if (!monitor.isCanceled()) {
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// check if the datasource actually holds data
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checkIsNonEmptyCdmDatabase(monitor);
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}
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if (dbSchemaValidation != DbSchemaValidation.CREATE
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&& !monitor.isCanceled()) {
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// if we do not create the datasource, we want to check if the
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// datasource is compatible with this editor
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checkDbSchemaVersionCompatibility(monitor);
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}
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// we are done with our low level checking and will free resources now
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cdmSource.closeOpenConnections();
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if (!monitor.isCanceled()) {
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CdmStore.close(monitor);
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}
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ICdmApplicationConfiguration applicationController = null;
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if (!monitor.isCanceled()) {
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CdmProgressMonitorAdapter subprogressMonitor = CdmProgressMonitorAdapter
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.CreateSubMonitor(monitor, 7);
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// This is where we instantiate the application controller
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int oldPriority = Thread.currentThread().getPriority();
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try {
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Thread.currentThread().setPriority(10);
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applicationController = getApplicationController(cdmSource,subprogressMonitor);
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} catch (Exception e) {
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if(! causeIsCancelationExceptionRecursive(e)){
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return new Status(IStatus.ERROR, "Could not connect to CDM Store", "An error occurred while trying to connect to datasource: " + cdmSource.getName(), e);
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}
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} finally {
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monitor.done();
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Thread.currentThread().setPriority(oldPriority);
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}
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}
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if (!monitor.isCanceled()) {
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CdmStore.setInstance(applicationController, cdmSource);
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display.asyncExec(new Runnable() {
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/*
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* (non-Javadoc)
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*
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* @see java.lang.Runnable#run()
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*/
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@Override
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public void run() {
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authenticate();
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startContext();
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}
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});
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MessagingUtils.info("Application context initialized.");
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return Status.OK_STATUS;
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} else {
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// Show datasource view if not shown yet
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display.asyncExec(new Runnable() {
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/*
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* (non-Javadoc)
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*
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* @see java.lang.Runnable#run()
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*/
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@Override
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public void run() {
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StoreUtil.showView(CdmDataSourceViewPart.ID);
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}
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});
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return Status.CANCEL_STATUS;
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}
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}
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private ICdmApplicationConfiguration getApplicationController(ICdmSource cdmSource, CdmProgressMonitorAdapter subprogressMonitor) {
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if(cdmSource instanceof ICdmDataSource) {
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return CdmApplicationController.NewInstance(applicationContextBean,
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(ICdmDataSource)cdmSource,
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dbSchemaValidation,
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false,
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subprogressMonitor);
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} else if(cdmSource instanceof ICdmRemoteSource) {
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return CdmApplicationRemoteController.NewInstance((ICdmRemoteSource)cdmSource,
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false,
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subprogressMonitor,
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null);
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} else {
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throw new UnsupportedOperationException("Cannot create application controller for " + cdmSource.getName());
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}
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}
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private void authenticate() {
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LoginDialog loginDialog = new LoginDialog(StoreUtil.getShell());
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loginDialog.open();
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}
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private void startContext() {
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CdmStore.getContextManager().notifyContextStart();
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}
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/**
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* @return
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*/
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private String getConnectionMessage() {
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return cdmSource.getConnectionMessage();
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}
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/**
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* @return
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* @throws SQLException
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*/
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private void checkDbSchemaVersionCompatibility(IProgressMonitor monitor) {
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monitor.subTask("Checking if datasource is compatible with this editor.");
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String dbSchemaVersion;
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boolean result = false;
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try {
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dbSchemaVersion = cdmSource.getDbSchemaVersion();
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// we assume that empty dbSchemaVersion means an empty database and
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// skip version checking
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result = dbSchemaVersion == null ? true : CdmMetaData
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.isDbSchemaVersionCompatible(dbSchemaVersion);
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monitor.worked(1);
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} catch (CdmSourceException e) {
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//
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}
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if (!result) {
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// Show an error message
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MessagingUtils
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.messageDialog(
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"DatabaseCompatibilityCheck failed",
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this,
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"The database schema for the chosen "
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+ "datasource '"
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+ cdmSource
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+ "' \n is not valid for this version of the taxonomic editor. \n"
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+ "Please update the chosen datasource or choose a new data source to connect to in the Datasource View.",
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null);
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monitor.setCanceled(true);
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}
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}
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private void checkIsNonEmptyCdmDatabase(IProgressMonitor monitor) {
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monitor.subTask("Checking if datasource is a non empty CDM database.");
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boolean isDbEmpty = false;
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try {
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isDbEmpty = cdmSource.isDbEmpty();
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} catch (CdmSourceException e) {
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isDbEmpty = true;
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}
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if(isDbEmpty) {
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dbSchemaValidation = DbSchemaValidation.CREATE;
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}
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}
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private boolean causeIsCancelationExceptionRecursive(Throwable throwable){
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if(throwable == null){
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return false;
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}else if(throwable instanceof CancellationException){
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return true;
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}else{
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return causeIsCancelationExceptionRecursive(throwable.getCause());
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}
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}
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private void checkDatabaseReachable(IProgressMonitor monitor) {
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try {
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monitor.subTask("Checking if datasource is reachable.");
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cdmSource.checkConnection();
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monitor.worked(1);
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} catch (CdmSourceException e) {
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MessagingUtils.messageDialog("Could not connect to chosen datasource",
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this, "Reason: " + e.getMessage(), e);
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monitor.setCanceled(true);
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}
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}
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}
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