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package org.jvnet.glassfish.comms.admin.reporter;
import java.io.File;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jvnet.glassfish.comms.util.LogUtil;
import com.ericsson.ssa.config.ConfigFactory;
import com.ericsson.ssa.config.SimpleConfig;
import com.ericsson.ssa.config.event.ConfigAddEvent;
import com.ericsson.ssa.config.event.ConfigChangeListener;
import com.ericsson.ssa.config.event.ConfigRemoveEvent;
import com.ericsson.ssa.config.event.ConfigUpdateEvent;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.ServerBeansFactory;
import com.sun.enterprise.server.ApplicationServer;
import com.sun.enterprise.server.ServerContext;
public class SMIAdapterHandler {
private static Logger logger = LogUtil.SMI_LOGGER.getLogger();;
private ConfigChangeListener listener;
private static final String CFG_SIP_SERVICE = "/SipService";
private static final String SIP_SERVICE_CFG_REGEXP = CFG_SIP_SERVICE + "/ElementProperty";
private static SMIAdapterHandler mySingleton = new SMIAdapterHandler();
private static final String SMI_SD_CFG_KEY = "smiServletAdapter";
private static final String SMI_LAYER_CFG_KEY = "smiLayerAdapter";
private static final String SMI_NM_CFG_KEY = "smiNetworkManagerAdapter";
private SMILogMessageAdapter smiServletAdapter = null;
private SMILogMessageAdapter smiLayerAdapter = null;
private SMILogMessageAdapter smiNetworkManagerAdapter = null;
public static SMIAdapterHandler getInstance() {
return mySingleton;
}
public SMIAdapterHandler() {
init();
}
public SMILogMessageAdapter getServletAdapter() {
return smiServletAdapter;
}
public SMILogMessageAdapter getLayerAdapter() {
return smiLayerAdapter;
}
public SMILogMessageAdapter getNetworkManagerAdapter() {
return smiNetworkManagerAdapter;
}
private void init() {
try {
// Read the property elements below the sip-service
ServerContext sc = ApplicationServer.getServerContext();
Config cfg = ServerBeansFactory.getConfigBean(sc.getConfigContext());
String servletAdapterClassName = ConfigFactory.getConfig().get(CFG_SIP_SERVICE, SMI_SD_CFG_KEY);
smiServletAdapter = setAdapterClass(servletAdapterClassName, smiServletAdapter);
String layerAdapterClassName = ConfigFactory.getConfig().get(CFG_SIP_SERVICE, SMI_NM_CFG_KEY);
smiLayerAdapter = setAdapterClass(layerAdapterClassName, smiLayerAdapter);
String nmAdapterClassName = ConfigFactory.getConfig().get(CFG_SIP_SERVICE, SMI_NM_CFG_KEY);
smiNetworkManagerAdapter = setAdapterClass(nmAdapterClassName, smiNetworkManagerAdapter);
// Add listener to configuration changes in the sip-listener element
listener = new PropertyConfigListener();
ConfigFactory.instance().registerConfigChangeListener(CFG_SIP_SERVICE, listener);
} catch (ConfigException e) {
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "Failed to SipMessageReporter adapter property: {1}", e);
}
}
}
private SMILogMessageAdapter setAdapterClass(String value, SMILogMessageAdapter currentAdapter) {
if (logger.isLoggable(Level.FINEST)){
logger.log(Level.FINEST, "changed config value:" + value);
}
if (value == null || "null".equalsIgnoreCase(value)) {
return null;
}
if (currentAdapter != null && currentAdapter.getClass().getName().equals(value)) {
// same adapter value as currently used, ignore for now, maybe add logic to check version/timestamp....
// avoid repeated classLoading when value is same as previously
return currentAdapter;
} else {
SMILogMessageAdapter adapter = loadAdapterClass(value);
if (adapter != null) {
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "Successfully changed adapter to:" + value);
}
}
return adapter;
}
}
private void scanConfigEvent(SimpleConfig cfg) {
Map<String, String> properties = cfg.getAll(SIP_SERVICE_CFG_REGEXP);
for (Map.Entry<String, String> entry : properties.entrySet()) {
if (entry.getKey().equals(SMI_SD_CFG_KEY)) {
smiServletAdapter = setAdapterClass(entry.getValue(), smiServletAdapter);
} else if (entry.getKey().equals(SMI_LAYER_CFG_KEY)) {
smiLayerAdapter = setAdapterClass(entry.getValue(), smiLayerAdapter);
} else if (entry.getKey().equals(SMI_NM_CFG_KEY)) {
smiNetworkManagerAdapter = setAdapterClass(entry.getValue(), smiNetworkManagerAdapter);
}
}
}
private SMILogMessageAdapter loadAdapterClass(String arg) {
try {
int sepIndex = arg.indexOf(';');
String packageAndClass = null;
ClassLoader classLoader = null;
if (sepIndex == -1) {
packageAndClass = arg;
classLoader = SMIAdapterHandler.class.getClassLoader();
} else {
packageAndClass = arg.substring(0, sepIndex);
String classRoot = arg.substring(sepIndex + 1);
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "package:" + packageAndClass + " root: " + classRoot);
}
File f = new File(classRoot);
if (f.exists() == false) {
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "Cannot find adapter class path root: " + classRoot);
}
return null;
}
URL[] urls = { f.toURL() };
classLoader = URLClassLoader.newInstance(urls, SMIAdapterHandler.class.getClassLoader());
}
Class<?> handlerClass = Class.forName(packageAndClass, true, classLoader);
Constructor<?> constructor = handlerClass.getConstructor((Class<?>[]) null);
Object o = constructor.newInstance((Object[]) null);
if (!(o instanceof SMILogMessageAdapter)) {
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "specified class does not implement SmiLogMessageAdapter interface :" + arg);
}
return null;
}
return (SMILogMessageAdapter) o;
} catch (Exception e) {
if (logger.isLoggable(Level.FINE)){
logger.log(Level.FINE, "failed to load Class:" + arg, e);
}
}
return null;
}
private final class PropertyConfigListener implements ConfigChangeListener {
public void handleConfigEvent(ConfigAddEvent event) {
SimpleConfig cfg = (SimpleConfig) event.getSource();
scanConfigEvent(cfg);
}
public void handleConfigEvent(ConfigUpdateEvent event) {
SimpleConfig cfg = (SimpleConfig) event.getSource();
scanConfigEvent(cfg);
}
public void handleConfigEvent(ConfigRemoveEvent event) {
SimpleConfig cfg = (SimpleConfig) event.getSource();
scanConfigEvent(cfg);
}
}
}