com.snaplogic.snaps.uniteller.CustomUFSConfigMgr.java Source code

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Here is the source code for com.snaplogic.snaps.uniteller.CustomUFSConfigMgr.java

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/*
 * SnapLogic - Data Integration
 *
 * Copyright (C) 2014, SnapLogic, Inc. All rights reserved.
 *
 * This program is licensed under the terms of
 * the SnapLogic Commercial Subscription agreement
 *
 * "SnapLogic" is a trademark of SnapLogic, Inc.
 */
package com.snaplogic.snaps.uniteller;

import com.uniteller.support.common.IUFSConfigMgr;
import com.uniteller.support.common.UFSConfigMgrException;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Properties;

import static com.snaplogic.snaps.uniteller.Messages.ERR_URL_CONNECT;

/**
 * Custom UFS configuration manager
 *
 * @author svatada
 */
public class CustomUFSConfigMgr implements IUFSConfigMgr {
    private static HashMap<String, Object> instanceMap = new HashMap<String, Object>();;
    private Properties configProperties = null;
    private URLConnection urlConnection = null;
    private static final Logger log = LoggerFactory.getLogger(CustomUFSConfigMgr.class);

    private CustomUFSConfigMgr(String fileLocation) throws UFSConfigMgrException {
        try {
            URL fileUrl = new URI(fileLocation).toURL();
            this.configProperties = new Properties();
            try (InputStream inputStream = getInputStream(fileUrl)) {
                this.configProperties.load(inputStream);
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            throw new UFSConfigMgrException(e.getMessage());
        } catch (URISyntaxException ex) {
            log.error(ex.getMessage(), ex);
            throw new UFSConfigMgrException(ex.getMessage());
        } finally {
            IOUtils.close(urlConnection);
        }
    }

    /**
     * @param filePath
     * @return CustomUFSConfigMgr
     * @throws UFSConfigMgrException
     */
    public static CustomUFSConfigMgr getInstance(String filePath) throws UFSConfigMgrException {
        CustomUFSConfigMgr customUFSConfigMgr = (CustomUFSConfigMgr) instanceMap.get(filePath);
        if (customUFSConfigMgr == null) {
            synchronized (CustomUFSConfigMgr.class) {
                customUFSConfigMgr = new CustomUFSConfigMgr(filePath);
                instanceMap.put(filePath, customUFSConfigMgr);
            }
        }
        return customUFSConfigMgr;
    }

    private InputStream getInputStream(final URL fileUrl) throws UFSConfigMgrException {
        try {
            urlConnection = fileUrl.openConnection();
            urlConnection.connect();
            return urlConnection.getInputStream();
        } catch (IOException e) {
            log.error(String.format(ERR_URL_CONNECT, fileUrl.getPath()));
            throw new UFSConfigMgrException(String.format(ERR_URL_CONNECT, fileUrl.getPath()));
        }
    }

    @Override
    public String getProperty(String propertyName) throws UFSConfigMgrException {
        return this.configProperties.getProperty(propertyName);
    }
}