package ca.uhn.hl7v2.hoh.relay;
   
   import java.io.FileNotFoundException;
   
   import org.springframework.context.ApplicationContext;
   import org.springframework.context.support.FileSystemXmlApplicationContext;
   
   import ca.uhn.hl7v2.hoh.util.IOUtils;
   import ca.uhn.hl7v2.hoh.util.VersionLogger;
  
  public class Launcher {
  	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(Launcher.class);
  
  	private FileSystemXmlApplicationContext myAppContext;
  
  	public Launcher() {
  		this("conf" + IOUtils.FILE_PATH_SEP + "config.xml");
  	}
  
  	public Launcher(String configFile) {
  		long start = System.currentTimeMillis();
  
          String b = "HAPI HL7 over HTTP Relay is starting. This software is Licensed under the " +
                  "Apache Software License (version 2.0) and is Copyright(c) " +
                  "2012 University Health Network.";
          ourLog.info(b);
  
  		VersionLogger.init();
  
  		Runtime.getRuntime().addShutdownHook(new ShutdownHook());
  
  		myAppContext = new FileSystemXmlApplicationContext(configFile);
  		myAppContext.start();
  
  		long delay = System.currentTimeMillis() - start;
  		ourLog.info("HAPI HL7 over HTTP Relay started in {} ms", delay);
  	}
  
  	public ApplicationContext getAppCtx() {
  		return myAppContext;
  	}
  
  	public void shutdown() {
  		ourLog.info("Shutdown request detected, stopping all services");
  		if (myAppContext != null) {
  			myAppContext.close();
  			myAppContext = null;
  		}
  		ourLog.info("Shutdown request completed");
  	}
  
  	public static void main(String[] args) throws FileNotFoundException {
  
  		// System.setProperty("relay.port.in",
  		// RandomServerPortProvider.findFreePort() + "");
  		// System.setProperty("relay.port.out",
  		// RandomServerPortProvider.findFreePort() + "");
  		new Launcher();
  	}
  
  	private final class ShutdownHook extends Thread {
  		@Override
  		public void run() {
  			shutdown();
  		}
  	}
  
  }