kirchnerei.glatteis.webapp.WebappSetup.java Source code

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Here is the source code for kirchnerei.glatteis.webapp.WebappSetup.java

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/*
 * Copyright 2012 Kirchnerei
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package kirchnerei.glatteis.webapp;

import kirchnerei.glatteis.page.RequestKind;
import kirchnerei.glatteis.resources.TimeoutETagStrategy;
import kirchnerei.grundstein.LogUtils;
import kirchnerei.grundstein.click.util.RequestConverter;
import kirchnerei.grundstein.click.util.RequestConverterFactory;
import kirchnerei.grundstein.composite.CompositeException;
import kirchnerei.grundstein.persistence.EntityService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Setup class for CompositeBuilder instance
 */
public class WebappSetup {

    private static final Log log = LogFactory.getLog(WebappSetup.class);

    /**
     * returns the value of either system env or system properties
     * @throws CompositeException if there is no value, then an exception will be thrown
     */
    public static String getParam(String name) {
        String value = System.getenv(name);
        if (value == null) {
            value = System.getProperty(name);
        }
        if (value == null) {
            throw new CompositeException("parameter '%s' is not present in system env or system properties", name);
        }
        return value;
    }

    /**
     * set the name of the persistence unit
     *
     * setUp the persistence parameter (driver, url, user and password)
     */
    public static class entityService extends EntityService {
        {
            setName("glatteis-app");

            String driver = getParam("DB_DRIVER");
            String url = getParam("DB_URL");
            String user = getParam("DB_USER");
            String password = getParam("DB_PASSWORD");
            setUpPersistence(driver, url, user, password);
        }
    }

    /**
     * add the converter for enum RequestKind
     */
    public static class requestConverterFactory extends RequestConverterFactory {
        {
            addConverter(RequestKind.class, new RequestConverter() {
                @Override
                public Object convert(Object o) {
                    return RequestKind.fromString(o != null ? o.toString() : "");
                }
            });
        }
    }

    /**
     * Timeout ETag Strategy for javascript and css styles
     *
     * <p>
     *     See also: web.xml
     * </p>
     *
     * @see kirchnerei.grundstein.webapp.HttpTextResourceServlet
     */
    public static class timeoutETagStrategy extends TimeoutETagStrategy {
        {
            setTimeout(1L);
            LogUtils.debug(log, "timeout etag strategy in 1 minute");
        }
    }
}