Tomcat example source code file (CatalinaProperties.java)

This example Tomcat source code file (CatalinaProperties.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

catalinaproperties, enumeration, failed, file, file, fileinputstream, inputstream, io, net, network, properties, properties, string, string, throwable, throwable, util

The Tomcat CatalinaProperties.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.catalina.startup;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.Enumeration;
import java.util.Properties;


/**
 * Utility class to read the bootstrap Catalina configuration.
 *
 * @author Remy Maucherat
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class CatalinaProperties {


    // ------------------------------------------------------- Static Variables

    private static org.apache.juli.logging.Log log=
        org.apache.juli.logging.LogFactory.getLog( CatalinaProperties.class );

    private static Properties properties = null;


    static {

        loadProperties();

    }


    // --------------------------------------------------------- Public Methods


    /**
     * Return specified property value.
     */
    public static String getProperty(String name) {
	
        return properties.getProperty(name);

    }


    /**
     * Return specified property value.
     */
    public static String getProperty(String name, String defaultValue) {

        return properties.getProperty(name, defaultValue);

    }


    // --------------------------------------------------------- Public Methods


    /**
     * Load properties.
     */
    private static void loadProperties() {

        InputStream is = null;
        Throwable error = null;

        try {
            String configUrl = getConfigUrl();
            if (configUrl != null) {
                is = (new URL(configUrl)).openStream();
            }
        } catch (Throwable t) {
            // Ignore
        }

        if (is == null) {
            try {
                File home = new File(getCatalinaBase());
                File conf = new File(home, "conf");
                File properties = new File(conf, "catalina.properties");
                is = new FileInputStream(properties);
            } catch (Throwable t) {
                // Ignore
            }
        }

        if (is == null) {
            try {
                is = CatalinaProperties.class.getResourceAsStream
                    ("/org/apache/catalina/startup/catalina.properties");
            } catch (Throwable t) {
                // Ignore
            }
        }

        if (is != null) {
            try {
                properties = new Properties();
                properties.load(is);
                is.close();
            } catch (Throwable t) {
                error = t;
            }
        }

        if ((is == null) || (error != null)) {
            // Do something
            log.warn("Failed to load catalina.properties", error);
            // That's fine - we have reasonable defaults.
            properties=new Properties();
        }

        // Register the properties as system properties
        Enumeration enumeration = properties.propertyNames();
        while (enumeration.hasMoreElements()) {
            String name = (String) enumeration.nextElement();
            String value = properties.getProperty(name);
            if (value != null) {
                System.setProperty(name, value);
            }
        }

    }


    /**
     * Get the value of the catalina.home environment variable.
     */
    private static String getCatalinaHome() {
        return System.getProperty("catalina.home",
                                  System.getProperty("user.dir"));
    }
    
    
    /**
     * Get the value of the catalina.base environment variable.
     */
    private static String getCatalinaBase() {
        return System.getProperty("catalina.base", getCatalinaHome());
    }


    /**
     * Get the value of the configuration URL.
     */
    private static String getConfigUrl() {
        return System.getProperty("catalina.config");
    }


}