Examples with NamedParamClass scala.tools.nsc.interpreter.NamedParamClass used on opensource projects

Example 1 with NamedParamClass

use of scala.tools.nsc.interpreter.NamedParamClass in project kylo by Teradata.

the class App method main.

/**
 * Evaluates a Scala file.
 *
 * @param args the command-line arguments
 * @throws Exception if an error occurs
 */
public static void main(@Nonnull String[] args) throws Exception {
    // Verify arguments
    if (args.length != 1) {
        System.err.println("error: usage: SparkShellApp file");
        System.exit(1);
    }
    // Load environment
    final ApplicationContext ctx = new AnnotationConfigApplicationContext("com.thinkbiganalytics.spark");
    File scriptFile = new File(args[0]);
    if (scriptFile.exists() && scriptFile.isFile()) {
        log.info("Loading script file at {} ", args[0]);
    } else {
        log.info("Couldn't find script file at {} will check classpath.", args[0]);
        String fileName = scriptFile.getName();
        scriptFile = new File("./" + fileName);
    }
    final String script = Files.toString(scriptFile, Charsets.UTF_8);
    // Prepare bindings
    final List<NamedParam> bindings = new ArrayList<>();
    final DatasourceProvider datasourceProvider = ctx.getBean(DatasourceProvider.class);
    bindings.add(new NamedParamClass("datasourceProvider", datasourceProvider.getClass().getName(), datasourceProvider));
    // Execute script
    final SparkScriptEngine engine = ctx.getBean(SparkScriptEngine.class);
    engine.eval(script, bindings);
}

Example 2 with NamedParamClass

use of scala.tools.nsc.interpreter.NamedParamClass in project kylo by Teradata.

the class TransformService method createShellTask.

/**
 * Creates a new Spark shell transformation.
 */
@Nonnull
private DataSet createShellTask(@Nonnull final TransformRequest request) throws ScriptException {
    log.entry(request);
    // Build bindings list
    final List<NamedParam> bindings = new ArrayList<>();
    bindings.add(new NamedParamClass("sparkContextService", SparkContextService.class.getName(), sparkContextService));
    if (request.getDatasources() != null && !request.getDatasources().isEmpty()) {
        if (datasourceProviderFactory != null) {
            final DatasourceProvider datasourceProvider = datasourceProviderFactory.getDatasourceProvider(request.getDatasources());
            bindings.add(new NamedParamClass("datasourceProvider", DatasourceProvider.class.getName() + "[org.apache.spark.sql.DataFrame]", datasourceProvider));
        } else {
            throw log.throwing(new ScriptException("Script cannot be executed because no data source provider factory is available."));
        }
    }
    // Ensure SessionState is valid
    if (SessionState.get() == null && sessionState != null) {
        SessionState.setCurrentSessionState(sessionState);
    }
    // Execute script
    final Object result;
    try {
        result = this.engine.eval(toScript(request), bindings);
    } catch (final Exception cause) {
        throw log.throwing(new ScriptException(cause));
    }
    if (result instanceof DataSet) {
        return log.exit((DataSet) result);
    } else {
        throw log.throwing(new IllegalStateException("Unexpected script result type: " + (result != null ? result.getClass() : null)));
    }
}