Examples with FileClassLoadingService org.apache.cayenne.modeler.FileClassLoadingService used on opensource projects

Example 1 with FileClassLoadingService

use of org.apache.cayenne.modeler.FileClassLoadingService in project cayenne by apache.

the class DataSourcePreferences method testDataSourceAction.

/**
 * Tries to establish a DB connection, reporting the status of this
 * operation.
 */
public void testDataSourceAction() {
    DBConnectionInfo currentDataSource = getConnectionInfo();
    if (currentDataSource == null) {
        return;
    }
    if (currentDataSource.getJdbcDriver() == null) {
        JOptionPane.showMessageDialog(null, "No JDBC Driver specified", "Warning", JOptionPane.WARNING_MESSAGE);
        return;
    }
    if (currentDataSource.getUrl() == null) {
        JOptionPane.showMessageDialog(null, "No Database URL specified", "Warning", JOptionPane.WARNING_MESSAGE);
        return;
    }
    try {
        FileClassLoadingService classLoader = new FileClassLoadingService();
        List<File> oldPathFiles = ((FileClassLoadingService) getApplication().getClassLoadingService()).getPathFiles();
        Collection<String> details = new ArrayList<>();
        for (File oldPathFile : oldPathFiles) {
            details.add(oldPathFile.getAbsolutePath());
        }
        Preferences classPathPreferences = getApplication().getPreferencesNode(ClasspathPreferences.class, "");
        if (editor.getChangedPreferences().containsKey(classPathPreferences)) {
            Map<String, String> map = editor.getChangedPreferences().get(classPathPreferences);
            for (Map.Entry<String, String> en : map.entrySet()) {
                String key = en.getKey();
                if (!details.contains(key)) {
                    details.add(key);
                }
            }
        }
        if (editor.getRemovedPreferences().containsKey(classPathPreferences)) {
            Map<String, String> map = editor.getRemovedPreferences().get(classPathPreferences);
            for (Map.Entry<String, String> en : map.entrySet()) {
                String key = en.getKey();
                if (details.contains(key)) {
                    details.remove(key);
                }
            }
        }
        if (details.size() > 0) {
            classLoader.setPathFiles(details.stream().map(File::new).collect(Collectors.toList()));
        }
        Class<Driver> driverClass = classLoader.loadClass(Driver.class, currentDataSource.getJdbcDriver());
        Driver driver = driverClass.newInstance();
        // connect via Cayenne DriverDataSource - it addresses some driver
        // issues...
        // can't use try with resource here as we can loose meaningful exception
        Connection c = new DriverDataSource(driver, currentDataSource.getUrl(), currentDataSource.getUserName(), currentDataSource.getPassword()).getConnection();
        try {
            c.close();
        } catch (SQLException ignored) {
        // i guess we can ignore this...
        }
        JOptionPane.showMessageDialog(null, "Connected Successfully", "Success", JOptionPane.INFORMATION_MESSAGE);
    } catch (Throwable th) {
        th = Util.unwindException(th);
        String message = "Error connecting to DB: " + th.getLocalizedMessage();
        StringTokenizer st = new StringTokenizer(message);
        StringBuilder sbMessage = new StringBuilder();
        int len = 0;
        String tempString;
        while (st.hasMoreTokens()) {
            tempString = st.nextElement().toString();
            if (len < 110) {
                len = len + tempString.length() + 1;
            } else {
                sbMessage.append("\n");
                len = 0;
            }
            sbMessage.append(tempString).append(" ");
        }
        JOptionPane.showMessageDialog(null, sbMessage.toString(), "Warning", JOptionPane.WARNING_MESSAGE);
    }
}