MonitorProperties.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it).
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openspcoop2.monitor.engine.config;

import org.openspcoop2.monitor.engine.constants.CostantiConfigurazione;
import org.openspcoop2.monitor.engine.exceptions.EngineException;

import java.util.Properties;

import org.openspcoop2.utils.UtilsException;


/**
 * MonitorProperties
 *
 * @author Poli Andrea (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class MonitorProperties {

    
    /** Copia Statica */
    private static MonitorProperties monitorPropertiesStaticInstance = null;

    private static synchronized void initialize(org.slf4j.Logger log) throws EngineException {

        if(MonitorProperties.monitorPropertiesStaticInstance==null)
            MonitorProperties.monitorPropertiesStaticInstance = new MonitorProperties(log); 

    }

    public static MonitorProperties getInstance(org.slf4j.Logger log) throws EngineException{

        if(MonitorProperties.monitorPropertiesStaticInstance==null) {
            // spotbugs warning 'SING_SINGLETON_GETTER_NOT_SYNCHRONIZED': l'istanza viene creata allo startup
            synchronized (MonitorProperties.class) {
                MonitorProperties.initialize(log);
            }
        }

        return MonitorProperties.monitorPropertiesStaticInstance;
    }
    
    
    
    
    
    /* ********  F I E L D S  P R I V A T I  ******** */

    /** Reader delle proprieta' impostate nel file 'server.properties' */
    private MonitorInstanceProperties reader;





    /* ********  C O S T R U T T O R E  ******** */

    /**
     * Viene chiamato in causa per istanziare il properties reader
     *
     * 
     */
    private MonitorProperties(org.slf4j.Logger log) throws EngineException{

        /* ---- Lettura del cammino del file di configurazione ---- */

        Properties propertiesReader = new Properties();
        java.io.InputStream properties = null;
        try{  
            properties = MonitorProperties.class.getResourceAsStream("/"+CostantiConfigurazione.CONFIG_FILENAME);
            if(properties==null){
                throw new EngineException("Properties "+CostantiConfigurazione.CONFIG_FILENAME+" not found");
            }
            propertiesReader.load(properties);
            properties.close();
        }catch(Exception e) {
            doError(log, properties, e);
        }   
    
        try{
            this.reader = new MonitorInstanceProperties(propertiesReader, log);
        }catch(Exception e){
            throw new EngineException(e.getMessage(),e);
        }
        
    }
    private void doError(org.slf4j.Logger log, java.io.InputStream properties, Exception e) throws EngineException {
        log.error("Riscontrato errore durante la lettura del file '"+CostantiConfigurazione.CONFIG_FILENAME+"': "+e.getMessage(),e);
        try{
            if(properties!=null)
                properties.close();
        }catch(Exception er){
            // close
        }
        throw new EngineException(e.getMessage(),e);
    }
    
    
    
    
    /* ********  P R O P E R T I E S  ******** */

    public String getProperty(String name,String defaultValue, boolean convertEnvProperty) throws UtilsException{
        String tmp = null;
        if(convertEnvProperty){
            tmp = this.reader.getValueConvertEnvProperties(name);
        }else{
            tmp = this.reader.getValue(name);
        }
        if(tmp==null){
            return defaultValue;
        }
        else{
            return tmp.trim();
        }
    }
    public String getProperty(String name,boolean required, boolean convertEnvProperty) throws UtilsException{
        String tmp = null;
        if(convertEnvProperty){
            tmp = this.reader.getValueConvertEnvProperties(name);
        }else{
            tmp = this.reader.getValue(name);
        }
        if(tmp==null &&
                required){
            throw new UtilsException("Property ["+name+"] not found");
        }
        if(tmp!=null){
            return tmp.trim();
        }else{
            return null;
        }
    }
    
}