/* This file is part of VoltDB.
* Copyright (C) 2008-2014 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltcore.utils;
import java.nio.ByteBuffer;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.json_voltpatches.JSONException;
import org.json_voltpatches.JSONObject;
import org.json_voltpatches.JSONStringer;
public class InstanceId
{
private final int m_coord;
private final long m_timestamp;
public InstanceId(int coord, long timestamp)
{
m_coord = coord;
m_timestamp = timestamp;
}
public InstanceId(JSONObject jsObj) throws JSONException
{
m_coord = jsObj.getInt("coord");
m_timestamp = jsObj.getLong("timestamp");
}
public int getCoord()
{
return m_coord;
}
public long getTimestamp()
{
return m_timestamp;
}
@Override
public int hashCode()
{
ByteBuffer buf = ByteBuffer.allocate(12);
buf.putLong(m_timestamp);
buf.putInt(m_coord);
buf.flip();
MessageDigest md;
try
{
md = MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e)
{
e.printStackTrace();
return 0;
}
md.update(buf);
byte[] digest = md.digest();
return ByteBuffer.wrap(digest).getInt();
}
public JSONObject serializeToJSONObject() throws JSONException
{
JSONStringer stringer = new JSONStringer();
stringer.object();
stringer.key("coord").value(m_coord);
stringer.key("timestamp").value(m_timestamp);
stringer.endObject();
return new JSONObject(stringer.toString());
}
@Override
public boolean equals(Object rhs)
{
if (rhs == null) {
return false;
}
if (rhs == this) {
return true;
}
if (!(rhs instanceof InstanceId)) {
return false;
}
InstanceId other = (InstanceId)rhs;
if (m_coord == other.m_coord && m_timestamp == other.m_timestamp) {
return true;
}
return false;
}
}