de.alpharogroup.jetty9.runner.factories.ServletContextHandlerFactory Maven / Gradle / Ivy

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package de.alpharogroup.jetty9.runner.factories;

import java.util.EnumSet;
import java.util.List;
import java.util.Map.Entry;

import javax.servlet.DispatcherType;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.StringUtils;
import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;

import de.alpharogroup.jetty9.runner.config.FilterHolderConfiguration;
import de.alpharogroup.jetty9.runner.config.ServletContextHandlerConfiguration;
import de.alpharogroup.jetty9.runner.config.ServletHolderConfiguration;

public class ServletContextHandlerFactory {

	/**
	 * Gets the new servlet context handler.
	 *
	 * @param configuration
	 *            the configuration
	 * @return the new servlet context handler
	 */
	public static ServletContextHandler getNewServletContextHandler(
			final ServletContextHandlerConfiguration configuration) {
		final ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
		context.setContextPath(configuration.getContextPath());

		context.setResourceBase(configuration.getWebapp().getAbsolutePath());

		context.getSessionHandler().setMaxInactiveInterval(configuration.getMaxInactiveInterval());

		initializeFilterHolder(configuration, context);

		initializeServletHolder(configuration, context);

		for (final Entry initParameter : configuration.getInitParameters().entrySet()) {
			context.setInitParameter(initParameter.getKey(), initParameter.getValue());
		}
		return context;
	}

	/**
	 * Initialize filter holder.
	 *
	 * @param configuration
	 *            the configuration
	 * @param context
	 *            the context
	 */
	private static void initializeFilterHolder(final ServletContextHandlerConfiguration configuration,
			final ServletContextHandler context) {
		final List filterHolderConfigurations = configuration
				.getFilterHolderConfigurations();
		if (CollectionUtils.isNotEmpty(filterHolderConfigurations)) {
			for (final FilterHolderConfiguration filterHolderConfiguration : filterHolderConfigurations) {
				final FilterHolder filter = new FilterHolder(filterHolderConfiguration.getFilterClass());
				if (StringUtils.isNotEmpty(filterHolderConfiguration.getName())) {
					filter.setName(filterHolderConfiguration.getName());
				}
				if (MapUtils.isNotEmpty(filterHolderConfiguration.getInitParameters())) {
					for (final Entry initParameter : filterHolderConfiguration.getInitParameters()
							.entrySet()) {
						filter.setInitParameter(initParameter.getKey(), initParameter.getValue());
					}
				}
				if (StringUtils.isNotEmpty(filterHolderConfiguration.getFilterPath())) {
					context.addFilter(filter, filterHolderConfiguration.getFilterPath(),
							EnumSet.of(DispatcherType.REQUEST, DispatcherType.ERROR));
				}
			}
		}
	}

	/**
	 * Initialize servlet holder.
	 *
	 * @param configuration
	 *            the configuration
	 * @param context
	 *            the context
	 */
	private static void initializeServletHolder(final ServletContextHandlerConfiguration configuration,
			final ServletContextHandler context) {
		final List servletHolderConfigurations = configuration
				.getServletHolderConfigurations();
		if (CollectionUtils.isNotEmpty(servletHolderConfigurations)) {
			for (final ServletHolderConfiguration servletHolderConfiguration : servletHolderConfigurations) {
				final ServletHolder servletHolder = new ServletHolder(servletHolderConfiguration.getServletClass());
				final String servletName = servletHolderConfiguration.getName();
				if (StringUtils.isNotEmpty(servletName)) {
					servletHolder.setName(servletHolderConfiguration.getName());
				}
				if (MapUtils.isNotEmpty(servletHolderConfiguration.getInitParameters())) {
					for (final Entry initParameter : servletHolderConfiguration.getInitParameters()
							.entrySet()) {
						servletHolder.setInitParameter(initParameter.getKey(), initParameter.getValue());
					}
				}
				if (StringUtils.isNotEmpty(servletHolderConfiguration.getPathSpec())) {
					context.addServlet(servletHolder, servletHolderConfiguration.getPathSpec());
				}
			}
		}
	}
}