How to use

tryTo

method

in

no.mnemonic.commons.utilities.lambda.LambdaUtils

@Override
public void stopComponent() {
 // Stop server to free up any resources.
 LambdaUtils.tryTo(server::stop, ex -> logger.error(ex, "Failed to cleanly shutdown REST API."));
}

@Override
public void startComponent() {
 // Initialize servlet using RESTEasy and it's Guice bridge.
 // The listener must be injected by the same Guice module which also binds the REST endpoints.
 ServletContextHandler servletHandler = new ServletContextHandler();
 servletHandler.addEventListener(listener);
 servletHandler.addServlet(HttpServletDispatcher.class, "/*");
 // Configure Jetty: Remove 'server' header from response and set listen port.
 HttpConfiguration httpConfig = new HttpConfiguration();
 httpConfig.setSendServerVersion(false);
 ServerConnector connector = new ServerConnector(server, new HttpConnectionFactory(httpConfig));
 connector.setPort(port);
 // Starting up Jetty to serve the REST API.
 server.addConnector(connector);
 server.setHandler(servletHandler);
 if (!LambdaUtils.tryTo(server::start, ex -> logger.error(ex, "Failed to start REST API."))) {
  throw new IllegalStateException("Failed to start REST API.");
 }
}

@Override
public void stopComponent() {
 // Release any connection to ElasticSearch.
 if (lowLevelClient != null) {
  LambdaUtils.tryTo(() -> lowLevelClient.close(), ex -> LOGGER.warning(ex, "Error while closing connections to ElasticSearch."));
 }
}