co.cask.cdap.filetailer.config.ConfigurationLoaderImpl.java Source code

Introduction

Here is the source code for co.cask.cdap.filetailer.config.ConfigurationLoaderImpl.java

Source

/*
 * Copyright  2014 Cask Data, Inc.
 *
 * 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 co.cask.cdap.filetailer.config;

import co.cask.cdap.filetailer.config.exception.ConfigurationLoadingException;
import com.google.common.io.Closeables;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * ConfigurationLoader interface implementation
 */
public class ConfigurationLoaderImpl implements ConfigurationLoader {

    private static final Logger LOG = LoggerFactory.getLogger(ConfigurationLoaderImpl.class);

    @Override
    public Configuration load(File file) throws ConfigurationLoadingException {
        LOG.debug("Start initializing loader with file: {}", file.getAbsolutePath());
        Properties properties = new Properties();
        try {
            InputStream is = new FileInputStream(file);
            try {
                properties.load(is);
                LOG.debug("Loader successfully initialized with file: {}", file.getAbsolutePath());
            } finally {
                Closeables.closeQuietly(is);
            }
        } catch (IOException e) {
            LOG.error("Cannot load properties", e);
            throw new ConfigurationLoadingException("Cannot load properties: " + e.getMessage());
        }
        return new ConfigurationImpl(properties);
    }
}