109 lines
3.6 KiB
Java
109 lines
3.6 KiB
Java
package ${package}.plc.web.web;
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import static li.strolch.utils.helper.ExceptionHelper.hasCause;
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import javax.servlet.ServletContextEvent;
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import javax.servlet.ServletContextListener;
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import javax.servlet.annotation.WebListener;
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import java.io.File;
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import java.io.InputStream;
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import ch.qos.logback.classic.LoggerContext;
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import ch.qos.logback.classic.util.ContextInitializer;
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import li.strolch.agent.api.StrolchAgent;
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import li.strolch.agent.api.StrolchBootstrapper;
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import li.strolch.exception.StrolchException;
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import li.strolch.rest.RestfulStrolchComponent;
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import li.strolch.utils.helper.FileHelper;
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import li.strolch.utils.helper.StringHelper;
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import li.strolch.xmlpers.api.XmlPersistenceException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.slf4j.impl.StaticLoggerBinder;
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@WebListener
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public class StartupListener implements ServletContextListener {
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private static final Logger logger = LoggerFactory.getLogger(StartupListener.class);
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public static final String APP_NAME = "MyApp";
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private StrolchAgent agent;
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@Override
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public void contextInitialized(ServletContextEvent sce) {
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logger.info("Starting " + APP_NAME + "...");
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long start = System.currentTimeMillis();
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try {
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startStrolch(sce);
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} catch (Throwable e) {
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logger.error("Failed to start " + APP_NAME + " due to: " + e.getMessage(), e);
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throw e;
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}
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long took = System.currentTimeMillis() - start;
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logger.info("Started " + APP_NAME + " in " + (StringHelper.formatMillisecondsDuration(took)));
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}
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private void startStrolch(ServletContextEvent sce) {
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String bootstrapFileName = "/" + StrolchBootstrapper.FILE_BOOTSTRAP;
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InputStream bootstrapFile = getClass().getResourceAsStream(bootstrapFileName);
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StrolchBootstrapper bootstrapper = new StrolchBootstrapper(StartupListener.class);
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this.agent = bootstrapper.setupByBootstrapFile(StartupListener.class, bootstrapFile);
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try {
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this.agent.initialize();
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this.agent.start();
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RestfulStrolchComponent.getInstance().setWebPath(sce.getServletContext().getRealPath("/"));
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} catch (StrolchException e) {
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if (!hasCause(e, XmlPersistenceException.class))
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throw e;
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logger.error(
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"Failed to start Strolch due to a XmlPersistenceException. Deleting local dbStore and restarting the agent...");
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this.agent.stop();
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this.agent.destroy();
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File dataPath = this.agent.getStrolchConfiguration().getRuntimeConfiguration().getDataPath();
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File dbStorePath = new File(dataPath, "dbStore");
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if (dbStorePath.exists()) {
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if (!FileHelper.deleteFile(dbStorePath, true))
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throw new IllegalStateException(
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"Strolch failed to load due to a persistence exception, could not delete dbStore, so failing hard!");
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// now try again to start
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bootstrapper = new StrolchBootstrapper(StartupListener.class);
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bootstrapFile = getClass().getResourceAsStream(bootstrapFileName);
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this.agent = bootstrapper.setupByBootstrapFile(StartupListener.class, bootstrapFile);
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this.agent.initialize();
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this.agent.start();
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}
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}
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}
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@Override
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public void contextDestroyed(ServletContextEvent sce) {
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try {
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new ContextInitializer((LoggerContext) StaticLoggerBinder.getSingleton().getLoggerFactory()).autoConfig();
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} catch (Exception e) {
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System.err.println("Failed to reconfigure logging...");
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e.printStackTrace(System.err);
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}
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if (this.agent != null) {
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logger.info("Destroying " + APP_NAME + "...");
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try {
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this.agent.stop();
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this.agent.destroy();
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} catch (Throwable e) {
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logger.error("Failed to stop " + APP_NAME + " due to: " + e.getMessage(), e);
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throw e;
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}
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}
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logger.info("Destroyed " + APP_NAME);
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}
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}
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