Utils.java

/*
 * Copyright 2016 Hortonworks.
 *
 * 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 com.hortonworks.registries.storage.tool;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Map;

public class Utils {
    public static Map<String, Object> readConfig(String configFilePath) throws IOException {
        ObjectMapper objectMapper = new YAMLMapper();
        return objectMapper.readValue(new File(configFilePath), Map.class);
    }

    public static void loadJarIntoClasspath(File jarFile) throws Exception {
        try {
            URL url = jarFile.toURI().toURL();
            URLClassLoader classLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
            Method method = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
            method.setAccessible(true);
            method.invoke(classLoader, url);
        } catch(Exception e) {
            System.out.println("Failed to load " + jarFile + " into classpath.");
            throw new Exception(e);
        }
    }
}