it.itis.pertini.falessi.tunes.TunesContextListener.java Source code

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Here is the source code for it.itis.pertini.falessi.tunes.TunesContextListener.java

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/*
 *    Copyright 2014 Davide Falessi
 *
 *   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 it.itis.pertini.falessi.tunes;

import static com.google.inject.Scopes.SINGLETON;
import it.itis.pertini.falessi.tunes.jdbc.AlbumHandler;
import it.itis.pertini.falessi.tunes.jdbc.AlbumListHandler;
import it.itis.pertini.falessi.tunes.jdbc.AuthorHandler;
import it.itis.pertini.falessi.tunes.jdbc.AuthorListHandler;
import it.itis.pertini.falessi.tunes.jdbc.BasicDataSourceProvider;
import it.itis.pertini.falessi.tunes.jdbc.QueryRunnerProvider;
import it.itis.pertini.falessi.tunes.jdbc.TrackHandler;
import it.itis.pertini.falessi.tunes.jdbc.TrackListHandler;
import it.itis.pertini.falessi.tunes.services.AlbumService;
import it.itis.pertini.falessi.tunes.services.AuthorService;
import it.itis.pertini.falessi.tunes.services.TrackService;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbutils.QueryRunner;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.name.Names;
import com.google.inject.servlet.GuiceServletContextListener;
import com.sun.jersey.guice.JerseyServletModule;
import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;

public final class TunesContextListener extends GuiceServletContextListener {

    @Override
    protected Injector getInjector() {
        return Guice.createInjector(new JerseyServletModule() {

            @Override
            protected void configureServlets() {
                // get and binds JDBC properties
                Names.bindProperties(binder(), loadProperties("jdbc.properties"));
                bind(Properties.class).toInstance(loadProperties("queries.properties"));

                // bind JDBC components
                bind(DataSource.class).toProvider(BasicDataSourceProvider.class).in(SINGLETON);
                bind(QueryRunner.class).toProvider(QueryRunnerProvider.class).in(SINGLETON);
                bind(AuthorHandler.class);
                bind(AuthorListHandler.class);
                bind(AlbumHandler.class);
                bind(AlbumListHandler.class);
                bind(TrackHandler.class);
                bind(TrackListHandler.class);

                // JSON serializer
                bind(JacksonJsonProvider.class).toInstance(new JacksonJsonProvider(
                        new ObjectMapper().setAnnotationIntrospector(new JaxbAnnotationIntrospector())));

                // main servlet
                serve("/*").with(GuiceContainer.class);

                // bind services
                bind(AuthorService.class);
                bind(AlbumService.class);
                bind(TrackService.class);
            }

        });
    }

    private Properties loadProperties(String fileName) {
        Properties properties = new Properties();

        InputStream input = getClass().getClassLoader().getResourceAsStream(fileName);
        try {
            properties.load(input);
        } catch (IOException e) {
            // cannot happen
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    // close quietly
                }
            }
        }

        return properties;
    }

}