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package dk.daoas.daoadresseservice;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.nio.charset.Charset;
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import java.util.Properties;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletContextEvent;
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import javax.servlet.ServletContextListener;
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import javax.servlet.ServletRegistration;
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import javax.servlet.annotation.WebListener;
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import org.apache.commons.lang3.SystemUtils;
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import com.jcabi.manifests.Manifests;
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import com.jcabi.manifests.ServletMfs;
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import dk.daoas.daoadresseservice.admin.ServiceConfig;
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import dk.thoerup.circuitbreaker.CircuitBreaker;
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import dk.thoerup.circuitbreaker.CircuitBreakerManager;
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import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
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import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
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import dk.thoerup.webconfig.ConfigServlet;
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import dk.thoerup.webconfig.PropertiesConfigLoader;
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/**
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* Application Lifecycle Listener implementation class ContextListener
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*
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*/
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@WebListener
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public class ContextListener implements ServletContextListener {
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public ContextListener() {
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// TODO Auto-generated constructor stub
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}
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public void contextDestroyed(ServletContextEvent ctxtEvt) {
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// TODO Auto-generated method stub
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}
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@Override
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public void contextInitialized(ServletContextEvent ctxtEvt) {
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System.out.println("Starting DAO Context");
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ServletContext ctxt = ctxtEvt.getServletContext();
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ServiceConfig conf = null;
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try {
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conf = initConfig(ctxt);
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} catch (IOException e) {
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System.out.println("Error loading config " + e.getMessage());
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throw new RuntimeException(e);
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}
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initDataLoader(ctxt, conf);
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initCircuitBreakers(ctxt, conf);
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try {
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Manifests.DEFAULT.append(new ServletMfs(ctxt));
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} catch (Exception e) {
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System.out.println("Error loading config " + e.getMessage());
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}
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System.out.println("DAO Context done");
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}
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private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
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final String CONF_FILE_NAME = "daoadresseservice.conf";
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ServiceConfig conf = new ServiceConfig();
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String file = null;
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if (SystemUtils.IS_OS_WINDOWS) {
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file = "C:\\" + CONF_FILE_NAME;
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} else {
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file = "/etc/" + CONF_FILE_NAME;
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}
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Properties propsFile = new Properties();
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try ( Reader reader = new InputStreamReader(new FileInputStream(file), Charset.forName("UTF-8")) ) {
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propsFile.load(reader);
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}
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new PropertiesConfigLoader(propsFile).loadConfig(conf);
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ctxt.setAttribute("config", conf);
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// /////////////////////////////////////
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ConfigServlet servlet = new ConfigServlet();
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servlet.setConfigObject( conf );
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ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
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dynconf.addMapping("/ConfigServlet");
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return conf;
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}
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private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
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DataLoader load = new DataLoader(ctxt,conf);
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ctxt.setAttribute("dataloader", load);
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load.doLoad();
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}
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private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
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CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
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CircuitBreaker osm = new CircuitBreaker("osm", conf);
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osm.setStatistics( new AccountingStatistics() );
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mgr.addCircuitBreaker( osm );
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CircuitBreaker google = new CircuitBreaker("google", conf);
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google.setStatistics( new AccountingStatistics() );
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mgr.addCircuitBreaker( google );
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//
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CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
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ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
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dynconf.addMapping("/CircuitBreakerServlet");
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dynconf.setInitParameter("readonly", "1");
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}
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}
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