components/basys.components/basyx.components.docker/basyx.components.xmlAAS/src/main/java/org/eclipse/basyx/components/executable/XMLExecutable.java

package org.eclipse.basyx.components.executable;

import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;

import org.eclipse.basyx.components.configuration.BaSyxConfiguration;
import org.eclipse.basyx.components.configuration.BaSyxContextConfiguration;
import org.eclipse.basyx.components.servlets.XMLAASServlet;
import org.eclipse.basyx.vab.protocol.http.server.AASHTTPServer;
import org.eclipse.basyx.vab.protocol.http.server.BaSyxContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.SAXException;

/**
 * Starts an HTTP server providing multiple AAS and submodels as described in
 * the XML file specified in the properties file <br />
 * They are made available at <i>localhost:4000/xmlAAS/$aasId/aas</i><br />
 * <br />
 * <b>Please note:</b> Neither the AASs nor the Submodels are added to the
 * registry. Additionally, the Submodel descriptors inside the AAS are missing.
 * <br />
 * There reason for this is, that the executable does not know about the outside
 * context (e.g. docker, ...)!
 * 
 * @author haque, schnicke
 */
public class XMLExecutable {

	// Creates a Logger based on the current class
	private static Logger logger = LoggerFactory.getLogger(XMLExecutable.class);

	// The path the created servlet is mapped to
	public static final String SERVLET_MAPPING = "/*";
	
	// The server with the servlet that will be created
	private static AASHTTPServer server;

	public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
		logger.info("Starting BaSyx XML component");

		// Load configuration
		BaSyxContextConfiguration config = new BaSyxContextConfiguration();
		config.loadFromResource(BaSyxContextConfiguration.DEFAULT_CONFIG_PATH);

		startComponent(config.getHostname(), config.getPort(), config.getContextPath(), config.getDocBasePath(), config.getProperty("xmlPath"));
	}
	

	/**
	 * Starts the XML-AAS at http://${hostName}:${port}/${path}
	 * 
	 * @param hostName
	 * @param port
	 * @param path
	 * @param docBasePath
	 * @throws IOException
	 * @throws SAXException
	 * @throws ParserConfigurationException
	 */
	public static void startComponent(String hostName, int port, String path, String docBasePath, String xmlPath) throws IOException, ParserConfigurationException, SAXException {
		// Init HTTP context and add an XMLAAServlet according to the configuration
		BaSyxContext context = new BaSyxContext(path, docBasePath, hostName, port);
		// Load xml content from file
		String xmlContent = BaSyxConfiguration.getResourceString(xmlPath);
		context.addServletMapping(SERVLET_MAPPING, new XMLAASServlet(xmlContent));

		// Create and start server
		server = new AASHTTPServer(context);
		logger.info("Starting server...");
		server.start();
	}
}