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package org.glassfish.loadbalancer.admin.cli.reader.impl;
import java.net.UnknownHostException;
import org.glassfish.loadbalancer.admin.cli.transform.Visitor;
import org.glassfish.loadbalancer.admin.cli.transform.InstanceVisitor;
import org.glassfish.loadbalancer.admin.cli.reader.api.InstanceReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.LbReaderException;
import com.sun.enterprise.config.serverbeans.ServerRef;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.Node;
import com.sun.enterprise.config.serverbeans.ServerTags;
import com.sun.grizzly.config.dom.NetworkConfig;
import com.sun.grizzly.config.dom.NetworkListener;
import com.sun.grizzly.config.dom.NetworkListeners;
import com.sun.grizzly.config.dom.Protocol;
import com.sun.grizzly.config.dom.Protocols;
import java.net.InetAddress;
import java.util.Iterator;
import org.glassfish.config.support.GlassFishConfigBean;
import org.glassfish.config.support.PropertyResolver;
import org.glassfish.loadbalancer.admin.cli.LbLogUtil;
import org.glassfish.loadbalancer.admin.cli.reader.api.LoadbalancerReader;
/**
* Provides instance information relavant to Load balancer tier.
*
* @author Kshitiz Saxena
*/
public class InstanceReaderImpl implements InstanceReader {
/**
* Constructor
*/
public InstanceReaderImpl(Domain domain, ServerRef ref) {
_domain = domain;
_serverRef = ref;
_server = domain.getServerNamed(ref.getRef());
}
public InstanceReaderImpl(Domain domain, Server server) {
_domain = domain;
_server = server;
}
/**
* Return server instance's name.
*
* @return String instance' name
*/
@Override
public String getName() throws LbReaderException {
return _server.getName();
}
/**
* Returns if the server is enabled in the load balancer or not.
*
* @return boolean true if enabled in LB; false if disabled
*/
@Override
public boolean getLbEnabled() throws LbReaderException {
if(_serverRef != null){
return Boolean.valueOf(_serverRef.getLbEnabled()).booleanValue();
}
return LoadbalancerReader.LBENABLED_VALUE;
}
/**
* This is used in quicescing. Timeouts after this interval and disables the
* instance in the load balancer.
*
* @return String Disable time out in minutes
*/
@Override
public String getDisableTimeoutInMinutes() throws LbReaderException {
if(_serverRef != null) {
return _serverRef.getDisableTimeoutInMinutes();
}
return LoadbalancerReader.DISABLE_TIMEOUT_IN_MINUTES_VALUE;
}
/**
* This is used in weighted round robin. returns the weight of the instance
*
* @return String Weight of the instance
*/
@Override
public String getWeight() throws LbReaderException {
return _server.getLbWeight();
}
/**
* Enlists both http and https listeners of this server instance
* It will be form "http:<hostname>:<port> https:<hostname>:<port>"
*
* @return String Listener(s) info.
*/
@Override
public String getListeners() throws LbReaderException {
StringBuffer listenerStr = new StringBuffer();
Config config = _domain.getConfigNamed(_server.getConfigRef());
NetworkConfig networkConfig = config.getNetworkConfig();
Protocols protocols = networkConfig.getProtocols();
NetworkListeners nls = networkConfig.getNetworkListeners();
Iterator<NetworkListener> listenerIter = nls.getNetworkListener().iterator();
int i = 0;
PropertyResolver resolver = new PropertyResolver(_domain, _server.getName());
while (listenerIter.hasNext()) {
NetworkListener listener = listenerIter.next();
NetworkListener rawListener = GlassFishConfigBean.getRawView(listener);
String prot = rawListener.getProtocol();
Protocol protocol = protocols.findProtocol(prot);
if (rawListener.getName().equals(ADMIN_LISTENER)) {
continue;
}
if (i > 0) {
listenerStr.append(' '); // space between listener names
}
i++;
if (Boolean.valueOf(protocol.getSecurityEnabled()).booleanValue()) {
listenerStr.append(HTTPS_PROTO);
} else {
listenerStr.append(HTTP_PROTO);
}
String hostName = getResolvedHostName(rawListener.getAddress());
listenerStr.append(hostName);
listenerStr.append(':');
// resolve the port name
String port = rawListener.getPort();
// If it is system variable, resolve it
if ((port != null) && (port.length() > 1) && (port.charAt(0) == '$')
&& (port.charAt(1) == '{') && (port.charAt(port.length() - 1) == '}')) {
String portVar = port.substring(2, port.length() - 1);
port = resolver.getPropertyValue(portVar);
if (port == null) {
throw new LbReaderException(LbLogUtil.getStringManager().getString("UnableToResolveSystemProperty", portVar, _server.getName()));
}
}
listenerStr.append(port);
}
return listenerStr.toString();
}
// --- VISITOR IMPLEMENTATION ---
@Override
public void accept(Visitor v) throws Exception {
InstanceVisitor pv = (InstanceVisitor) v;
pv.visit(this);
}
private String getResolvedHostName(String address) throws LbReaderException {
InetAddress addr = null;
if (!address.equals(BIND_TO_ANY)) {
try {
addr = InetAddress.getByName(address);
} catch (UnknownHostException ex) {
String msg = LbLogUtil.getStringManager().getString("CannotResolveHostName", address);
throw new LbReaderException(msg, ex);
}
if (!addr.isLoopbackAddress()) {
return address;
}
}
String nodeName = _server.getNodeRef();
Node node = _domain.getNodes().getNode(nodeName);
if (node == null) {
String msg = LbLogUtil.getStringManager().getString("UnableToGetNode", _server.getName());
throw new LbReaderException(msg);
}
if (node.getNodeHost() != null && !node.getNodeHost().equals(LOCALHOST)) {
return node.getNodeHost();
}
return System.getProperty("com.sun.aas.hostName");
}
// --- PRIVATE VARS -------
private Domain _domain = null;
private ServerRef _serverRef = null;
private Server _server = null;
private static final String HTTP_PROTO = "http://";
private static final String HTTPS_PROTO = "https://";
private static final String ADMIN_LISTENER = ServerTags.ADMIN_LISTENER_ID;
private static final String BIND_TO_ANY = "0.0.0.0";
private static final String LOCALHOST = "localhost";
}