/**
* Copyright 2013 Netflix, 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 com.netflix.priam.utils;
import com.google.common.base.Charsets;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import com.google.common.io.Files;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.management.remote.JMXConnector;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.util.List;
public class SystemUtils
{
private static final Logger logger = LoggerFactory.getLogger(SystemUtils.class);
public static String getDataFromUrl(String url)
{
try
{
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setConnectTimeout(1000);
conn.setReadTimeout(1000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() != 200)
{
throw new RuntimeException("Unable to get data for URL " + url);
}
byte[] b = new byte[2048];
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataInputStream d = new DataInputStream((FilterInputStream) conn.getContent());
int c = 0;
while ((c = d.read(b, 0, b.length)) != -1)
bos.write(b, 0, c);
String return_ = new String(bos.toByteArray(), Charsets.UTF_8);
logger.info("Calling URL API: {} returns: {}", url, return_);
conn.disconnect();
return return_;
}
catch (Exception ex)
{
throw new RuntimeException(ex);
}
}
/**
* delete all the files/dirs in the given Directory but dont delete the dir
* itself.
*/
public static void cleanupDir(String dirPath, List<String> childdirs) throws IOException
{
if (childdirs == null || childdirs.size() == 0)
FileUtils.cleanDirectory(new File(dirPath));
else
{
for (String cdir : childdirs)
FileUtils.cleanDirectory(new File(dirPath + "/" + cdir));
}
}
public static void createDirs(String location)
{
File dirFile = new File(location);
if (dirFile.exists() && dirFile.isFile())
{
dirFile.delete();
dirFile.mkdirs();
}
else if (!dirFile.exists())
dirFile.mkdirs();
}
public static byte[] md5(byte[] buf)
{
try
{
MessageDigest mdigest = MessageDigest.getInstance("MD5");
mdigest.update(buf, 0, buf.length);
return mdigest.digest();
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
/**
* Get a Md5 string which is similar to OS Md5sum
*/
public static String md5(File file)
{
try
{
HashCode hc = Files.hash(file, Hashing.md5());
return toHex(hc.asBytes());
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public static String toHex(byte[] digest)
{
StringBuffer sb = new StringBuffer(digest.length * 2);
for (int i = 0; i < digest.length; i++)
{
String hex = Integer.toHexString(digest[i]);
if (hex.length() == 1)
{
sb.append("0");
}
else if (hex.length() == 8)
{
hex = hex.substring(6);
}
sb.append(hex);
}
return sb.toString().toLowerCase();
}
public static String toBase64(byte[] md5)
{
byte encoded[] = Base64.encodeBase64(md5, false);
return new String(encoded);
}
public static void closeQuietly(JMXNodeTool tool)
{
try
{
tool.close();
}
catch (Exception e)
{
logger.warn("failed to close jxm node tool", e);
}
}
public static void closeQuietly(JMXConnector jmc)
{
try
{
jmc.close();
}
catch (Exception e)
{
logger.warn("failed to close JMXConnector", e);
}
}
}