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package org.jvnet.glassfish.comms.clb.admin;
import org.jvnet.glassfish.comms.clb.core.CLBRuntimeException;
import org.jvnet.glassfish.comms.clb.core.ClusterHealthMonitorFactory;
import org.jvnet.glassfish.comms.clb.core.Controller;
import org.jvnet.glassfish.comms.clb.core.ControllerInitializer;
import org.jvnet.glassfish.comms.util.LogUtil;
import org.jvnet.glassfish.comms.admin.event.extensions.clb.ConvergedLbEvent;
import org.jvnet.glassfish.comms.admin.event.extensions.clb.ConvergedLbEventListener;
import org.jvnet.glassfish.comms.admin.event.extensions.clb.ConvergedLbPolicyEvent;
import org.jvnet.glassfish.comms.admin.event.extensions.clb.ConvergedLbPolicyEventListener;
import org.w3c.dom.DOMException;
import org.xml.sax.SAXException;
import java.io.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.JAXBException;
import javax.xml.parsers.ParserConfigurationException;
import com.sun.enterprise.admin.event.AdminEventListenerRegistry;
import java.util.Iterator;
/**
* This class is responsible for monitoring for configuration changes both through DAS changes and
* by polling and periodic checking for changes to converged-loadbalancer.xml.
*/
public class CLBConfigurator {
private static final Logger logger = LogUtil.CLB_LOGGER.getLogger();
static CLBConfigurator sigletonCLBConfigurator = null;
private static boolean adminEventListenersRegistered = false;
File lbConfig = null;
Date lastModifiedDate = null;
Loadbalancer lb;
ObjectFactory configFactory;
ControllerInitializer sipControllerInitializer;
ControllerInitializer httpControllerInitializer;
private String configName;
/**
* public constructor to create a new CLBConfigurator instance
*
*/
private CLBConfigurator() {
configFactory = new ObjectFactory();
}
public void init(String configName, String lbConfigFileName,
ControllerInitializer sipControllerInitializer,
ControllerInitializer httpControllerInitializer) {
logger.log(
Level.INFO, "clb.admin.startInitialization" + lbConfigFileName);
registerAdminEventListeners();
this.sipControllerInitializer = sipControllerInitializer;
this.httpControllerInitializer = httpControllerInitializer;
this.configName = configName;
this.lbConfig = new File(configName + File.separator + lbConfigFileName);
reload(lbConfigFileName);
logger.log(Level.INFO, "clb.admin.InitializationComplete");
}
/**
* Method to load the configration from the inputStream
*/
public void load(InputStream in)
throws JAXBException, DOMException, ParserConfigurationException,
IOException, SAXException {
lb = configFactory.load(in);
}
/**
* Method to force a reload of the configration from the XML file
*/
public void reload(String newLBConfigFileName) {
logger.log(Level.INFO,
"clb.admin.ReloadConfig", new Object[]{newLBConfigFileName});
InputStream in = null;
boolean reconfig = false;
try {
lbConfig = new File(configName + File.separator + newLBConfigFileName);
in = new FileInputStream(lbConfig);
load(in);
reconfig = true;
} catch (FileNotFoundException e) {
logger.log(Level.SEVERE,
"clb.admin.cannot_load_xml_file", e.getMessage());
if(logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "clb.caught_an_exception", e);
}
} catch (Exception e) {
logger.log(Level.SEVERE,
"clb.admin.cannot_load_xml_file", e.getMessage());
if(logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "clb.caught_an_exception", e);
}
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
//no op
}
}
if(reconfig)
reconfig();
}
private void reconfig() {
assert (sipControllerInitializer != null) &&
(httpControllerInitializer != null);
try {
if (lb != null) {
List<Cluster> clusters = lb.getCluster();
if ((clusters == null) || (clusters.size() == 0)) {
logger.log(Level.WARNING,
"clb.admin.no_clusters_defined");
return;
}
ClusterHealthMonitorFactory.createClusterHealthMonitors(clusters);
Controller sipController = sipControllerInitializer.createController();
Controller httpController = httpControllerInitializer.createController();
logger.log(Level.FINER, "clb.admin.adding_clusters", clusters.size());
for (int i = 0; i < clusters.size(); i++) {
Cluster cluster = clusters.get(i);
addCluster(cluster.getName(), cluster.getSelfLoadbalance(),
sipController, httpController);
List instances = cluster.getInstance();
logger.log(Level.FINER, "clb.admin.adding_instances", instances.size());
addInstances(cluster.getName(), instances, sipController,
httpController);
List webModules = cluster.getWebModule();
logger.log(Level.FINER, "clb.admin.adding_webmodules", webModules.size());
addWebModules(cluster.getName(), webModules, sipController,
httpController);
logger.log(Level.FINER, "clb.admin.set_policies", new Object[]{lb.getHttpPolicy(), lb.getSipPolicy()});
setPolicies(lb.getHttpPolicy(), lb.getSipPolicy(),
sipController, httpController);
logger.log(Level.FINER, "clb.admin.set_dcr", lb.getDcrFile());
if (lb.getDcrFile() == null || lb.getDcrFile().length() == 0) {
setDCRFileName(null, sipController, httpController);
} else {
setDCRFileName(configName + File.separator + lb.getDcrFile(),
sipController, httpController);
}
logger.log(Level.FINE,
"clb.admin.config_success", new Object[] {cluster.getName(),
Integer.toString(instances.size()),
Integer.toString(webModules.size())});
}
addProperties(lb.getProperty(), sipController, httpController);
sipControllerInitializer.setController(sipController);
httpControllerInitializer.setController(httpController);
}
} catch (CLBRuntimeException e) {
logger.log(Level.SEVERE,
"clb.admin.config_failed", e.getMessage());
if(logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "clb.caught_an_exception", e);
}
}
}
private void addCluster(String clusterName, String selfLoadbalance,
Controller sipController, Controller httpController)
throws CLBRuntimeException {
boolean bselfLoadbalance = Boolean.parseBoolean(selfLoadbalance);
logger.log(
Level.FINER, "clb.admin.added_cluster", new String[]{clusterName, selfLoadbalance});
try {
sipController.addCluster(clusterName, bselfLoadbalance);
httpController.addCluster(clusterName, bselfLoadbalance);
} catch (CLBRuntimeException e) {
logger.log(Level.SEVERE,
"clb.admin.clb_exception", new String[]{clusterName, e.getMessage()});
throw e;
}
}
private void addInstances(String clusterName, List instances,
Controller sipController, Controller httpController)
throws CLBRuntimeException {
if (instances == null) {
return;
}
for (int i = 0; i < instances.size(); i++) {
Instance instance = (Instance) instances.get(i);
logger.log(
Level.FINER, "clb.admin.parsing_instance", instance.getName());
String strListeners = instance.getListeners();
String[] listeners = parseListeners(strListeners);
addInstance(clusterName, instance.getName(), instance.enabled,
instance.getDisableTimeoutInMinutes(), listeners,
sipController, httpController);
}
}
private String[] parseListeners(String listeners) {
if (listeners == null) {
return new String[0];
}
StringTokenizer tokenizer = new StringTokenizer(listeners, " ");
List<String> listenersList = new ArrayList<String>();
while (tokenizer.hasMoreTokens()) {
String listener = tokenizer.nextToken();
logger.log(
Level.FINER, "clb.admin.parsing_listener", listener);
listenersList.add(listener);
}
return listenersList.toArray(new String[listenersList.size()]);
}
private void addInstance(String clusterName, String instanceName,
String strEnabled, String strTimeoutInMinutes, String[] listeners,
Controller sipController, Controller httpController)
throws CLBRuntimeException {
boolean enabled = Boolean.parseBoolean(strEnabled);
int timeoutInMinutes = Integer.parseInt(strTimeoutInMinutes);
logger.log(
Level.FINER, "clb.admin.adding_instance", new String[]{instanceName, clusterName});
try {
sipController.addInstance(clusterName, instanceName, enabled,
timeoutInMinutes, listeners);
httpController.addInstance(clusterName, instanceName, enabled,
timeoutInMinutes, listeners);
} catch (CLBRuntimeException e) {
logger.log(Level.SEVERE, "clb.admin.clbruntimeEx", new String[]{instanceName, e.getMessage()});
throw e;
}
}
private void addWebModules(String clusterName, List webModules,
Controller sipController, Controller httpController)
throws CLBRuntimeException {
assert webModules != null;
for (int i = 0; i < webModules.size(); i++) {
WebModule webModule = (WebModule) webModules.get(i);
addWebModule(clusterName, webModule.getContextRoot(),
webModule.getType(), sipController, httpController);
}
}
private void addWebModule(String clusterName, String contextRoot,
String type, Controller sipController, Controller httpController)
throws CLBRuntimeException {
try {
logger.log(
Level.FINER, "clb.admin.adding_webmodule", new String[]{contextRoot, clusterName});
httpController.addWebModule(clusterName, contextRoot, type);
} catch (CLBRuntimeException e) {
logger.log(Level.SEVERE,
"clb.admin.clbruntimeExWM", new String[]{contextRoot, e.getMessage()});
throw e;
}
}
private void addProperties(List<Property> properties,
Controller sipController, Controller httpController){
Iterator<Property> propertiesIter =
properties.iterator();
while(propertiesIter.hasNext()){
Property property = propertiesIter.next();
sipController.addProperty(property.getName(),
property.getValue());
httpController.addProperty(property.getName(),
property.getValue());
}
}
private void setPolicies(String HTTPPolicy, String SIPPolicy,
Controller sipController, Controller httpController) {
httpController.setPolicy(HTTPPolicy);
sipController.setPolicy(SIPPolicy);
}
private void setDCRFileName(String name, Controller sipController,
Controller httpController) {
httpController.setDCRFileName(name);
sipController.setDCRFileName(name);
}
public String getDCRFileName() {
if (lb == null) {
return null;
}
return lb.getDcrFile();
}
public boolean isSelfLoadbalanced() {
if ((lb != null) && (lb.getCluster() != null) &&
(lb.getCluster().get(0) != null)) {
return new Boolean(lb.getCluster().get(0).getSelfLoadbalance()).booleanValue();
}
return false;
}
public ControllerInitializer getSipControllerInitializer() {
return sipControllerInitializer;
}
public ControllerInitializer getHttpControllerInitializer() {
return httpControllerInitializer;
}
/**
* Method to check if the converged-loadbalancer.xml has changed
*
* @return a boolean indicating whether the configuration has changed
*/
protected boolean checkIfConfigChanged() {
if (lastModifiedDate.before(new Date(this.lbConfig.lastModified()))) {
return true;
}
return false;
}
public static CLBConfigurator getInstance() {
return sigletonCLBConfigurator;
}
public static CLBConfigurator createInstance() {
if (sigletonCLBConfigurator == null) {
sigletonCLBConfigurator = new CLBConfigurator();
}
return sigletonCLBConfigurator;
}
public static void registerAdminEventListeners() {
if (adminEventListenersRegistered) {
return;
}
adminEventListenersRegistered = true;
//Register the event listeners for Dynamic reconfig
//If CLBConfigurator is null, then no need to register admin event listener
//for converged load-balancer xml updates
if (CLBConfigurator.getInstance() != null) {
AdminEventListenerRegistry.registerEventListener(ConvergedLbEvent.eventType,
new ConvergedLBEventListenerImpl(), ConvergedLbEventListener.class);
}
AdminEventListenerRegistry.registerEventListener(ConvergedLbPolicyEvent.eventType,
new ConvergedLBPolicyEventListenerImpl(), ConvergedLbPolicyEventListener.class);
}
}