/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.cloud.topology;
import java.net.InetAddress;
import java.util.concurrent.ConcurrentHashMap;
import com.caucho.config.ConfigException;
import com.caucho.util.L10N;
/**
* Defines a cloud server, a single Resin instance.
*
* Each server has the following:
* <ul>
* <li>A unique id across the entire domain.
* <li>A containing pod (contained within the server).
* <li>A unique index within the pod. Servers 0-2 are special servers called
* "triad" servers.
* <li>An IP address and port.
* </ul>
*
* Servers are organized into pods of up to 64 servers, contained in a cluster.
*
* All the clusters are contained in a domain.
*/
public class CloudServer {
private static final L10N L = new L10N(CloudServer.class);
private static final int DECODE[];
private final String _id;
private final CloudPod _pod;
private final int _index;
private final boolean _isStatic;
// unique identifier for the server within the cluster
private String _uniqueClusterId;
// unique identifier for the server within all Resin clusters
private String _uniqueDomainId;
private String _address;
private int _port;
private boolean _isSSL;
private boolean _isSelf;
private CloudServerState _state = CloudServerState.UNKNOWN;
private final ConcurrentHashMap<Class<?>,Object> _dataMap
= new ConcurrentHashMap<Class<?>,Object>();
public CloudServer(String id,
CloudPod pod,
int index,
String address,
int port,
boolean isSSL,
boolean isStatic)
{
if (id.equals(""))
throw new IllegalArgumentException();
_id = id;
_pod = pod;
_index = index;
if (index < 0 || index >= 64)
throw new IllegalArgumentException(L.l("'{0}' is an invalid server index because it must be between 0 and 64",
index));
if (! isStatic && index == 0)
throw new IllegalArgumentException(L.l("The first server must be static."));
if (id == null)
throw new NullPointerException();
if (pod == null)
throw new NullPointerException();
_address = address;
_port = port;
_isSSL = isSSL;
_isStatic = isStatic;
// _clusterPort = new ClusterPort(this);
// _ports.add(_clusterPort);
StringBuilder sb = new StringBuilder();
sb.append(convert(getIndex()));
sb.append(convert(getPod().getIndex()));
sb.append(convert(getPod().getIndex() / 64));
_uniqueClusterId = sb.toString();
String clusterId = pod.getCluster().getId();
if (clusterId.equals(""))
clusterId = "default";
_uniqueDomainId = _uniqueClusterId + "." + clusterId.replace('.', '_');
if (! isValidAddress(_address)) {
throw new ConfigException(L.l("'{0}' is not a valid cluster IP address because it is not a private network IP address.",
_address));
}
}
private boolean isValidAddress(String address)
{
try {
InetAddress addr = InetAddress.getByName(address);
byte []ipAddress = addr.getAddress();
if (ipAddress.length == 6)
return true;
if (ipAddress.length != 4)
return false;
if (ipAddress[0] == 0)
return true;
if (ipAddress[0] == 127)
return true;
if (ipAddress[0] == 10)
return true;
if ((ipAddress[0] & 0xff) == 192
&& (ipAddress[1] & 0xff) == 168) {
return true;
}
if ((ipAddress[0] & 0xff) == 169
&& (ipAddress[1] & 0xff) == 254) {
return true;
}
if ((ipAddress[0] & 0xff) == 172
&& (ipAddress[1] & 0xf0) == 0x10) {
return true;
}
return false;
} catch (Exception e) {
return false;
}
}
/**
* Gets the unique server identifier.
*/
public final String getId()
{
return _id;
}
public final String getDebugId()
{
if ("".equals(_id))
return "default";
else
return _id;
}
/**
* Returns the index within the pod.
*/
public final int getIndex()
{
return _index;
}
/**
* Returns the server's id within the cluster
*/
public final String getIdWithinCluster()
{
return _uniqueClusterId;
}
/**
* Returns the server's id within all Resin clusters
*/
public final String getIdWithinDomain()
{
return _uniqueDomainId;
}
/**
* True if this server is a triad.
*/
public boolean isTriad()
{
return false;
}
/**
* True for statically configured servers.
*/
public boolean isStatic()
{
return _isStatic;
}
/**
* True for the active server
*/
public boolean isSelf()
{
return _isSelf;
}
/**
* Sets true for the active server.
*/
public void setSelf(boolean isSelf)
{
_isSelf = isSelf;
_pod.setSelf(isSelf);
}
/**
* Returns the servers current state.
*/
public CloudServerState getState()
{
return _state;
}
//
// topology attributes
//
/**
* Returns the pod
*/
public CloudPod getPod()
{
return _pod;
}
/**
* Returns the cluster.
*/
public CloudCluster getCluster()
{
return getPod().getCluster();
}
/**
* Returns the system.
*/
public CloudSystem getSystem()
{
return getCluster().getSystem();
}
/**
* Returns the pod owner
*/
public TriadOwner getTriadOwner()
{
return TriadOwner.getOwner(getIndex());
}
//
// IP addresses
//
/**
* Gets the address
*/
public final String getAddress()
{
return _address;
}
/**
* Gets the port
*/
public final int getPort()
{
return _port;
}
public boolean isSSL()
{
return _isSSL;
}
//
// state transitions
//
public void onHeartbeatStart()
{
CloudServerState oldState;
synchronized (this) {
oldState = _state;
_state = oldState.onHeartbeatStart();
}
if (_state != oldState)
updateState();
}
public void onHeartbeatStop()
{
CloudServerState oldState;
synchronized (this) {
oldState = _state;
_state = oldState.onHeartbeatStop();
}
if (_state != oldState)
updateState();
}
public void setState(CloudServerState state)
{
if (_pod.isSelf())
throw new IllegalStateException();
_state = state;
}
public void overrideState(CloudServerState state)
{
_state = state;
updateState();
}
public void disable()
{
overrideState(CloudServerState.DISABLED);
}
public void disableSoft()
{
overrideState(CloudServerState.DISABLED_SOFT);
}
public void enable()
{
overrideState(CloudServerState.ACTIVE);
}
private void updateState()
{
_pod.onServerStateChange(this);
}
//
// data
//
public void putData(Object value)
{
_dataMap.put(value.getClass(), value);
}
@SuppressWarnings("unchecked")
public <T> T putDataIfAbsent(T value)
{
return (T) _dataMap.putIfAbsent(value.getClass(), value);
}
@SuppressWarnings("unchecked")
public <T> T getData(Class<T> cl)
{
return (T) _dataMap.get(cl);
}
@SuppressWarnings("unchecked")
public <T> T removeData(Class<T> cl)
{
return (T) _dataMap.remove(cl);
}
@Override
public String toString()
{
return (getClass().getSimpleName()
+ "[" + _id + "," + _index
+ "," + _address + ":" + _port
+ "]");
}
private static char convert(long code)
{
code = code & 0x3f;
if (code < 26)
return (char) ('a' + code);
else if (code < 52)
return (char) ('A' + code - 26);
else if (code < 62)
return (char) ('0' + code - 52);
else if (code == 62)
return '_';
else
return '-';
}
public static int decode(int code)
{
return DECODE[code & 0x7f];
}
static {
DECODE = new int[128];
for (int i = 0; i < 64; i++)
DECODE[(int) convert(i)] = i;
}
}