uk.ac.bolton.spaws.service.LearningRegistryNode.java Source code

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Here is the source code for uk.ac.bolton.spaws.service.LearningRegistryNode.java

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/*
 *  (c) 2012 University of Bolton
 *  
 *  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 uk.ac.bolton.spaws.service;

import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.log4j.Logger;

import uk.ac.bolton.spaws.model.impl.Node;

public class LearningRegistryNode {

    static Logger logger = Logger.getLogger(LearningRegistryNode.class.getName());

    private String url = "http://alpha.mimas.ac.uk";
    private String username = "fred";
    private String password = "flintstone";
    private Node node;

    private static LearningRegistryNode instance;

    public static LearningRegistryNode getInstance() {
        if (instance == null)
            instance = new LearningRegistryNode();
        return instance;
    }

    private LearningRegistryNode() {
        try {
            PropertiesConfiguration properties = new PropertiesConfiguration("service.properties");
            if (properties.containsKey("spaws.node.location"))
                url = properties.getString("spaws.node.location");
            if (properties.containsKey("spaws.node.username"))
                username = properties.getString("spaws.node.username");
            if (properties.containsKey("spaws.node.password"))
                password = properties.getString("spaws.node.password");
        } catch (ConfigurationException e) {
            logger.error("error loading properties from configuration file; using defaults instead");
        }

        try {
            node = new Node(new URL(url), username, password);
        } catch (MalformedURLException e) {
            logger.warn("SPAWS node URL is invalid; using defaults");
            try {
                node = new Node(new URL(url), username, password);
            } catch (MalformedURLException e1) {
                // Should never happen...
            }

        }
    }

    public Node getNode() {
        return node;
    }

}