example Service
| import java.util.Properties;
|
| import javax.management.Notification;
| import javax.management.NotificationFilterSupport;
| import javax.management.NotificationListener;
| import javax.management.ObjectName;
| import javax.naming.InitialContext;
| import javax.transaction.SystemException;
| import javax.transaction.TransactionManager;
|
| import org.apache.commons.logging.Log;
| import org.apache.commons.logging.LogFactory;
| import org.jboss.cache.Fqn;
| import org.jboss.cache.PropertyConfigurator;
| import org.jboss.cache.TreeCache;
|
| import
com.esri.infoservices.j2ee.jbosscache.exceptions.InvalidArgumentException;
| import com.ibm.websphere.management.AdminServiceFactory;
| import com.ibm.websphere.management.NotificationConstants;
| import com.ibm.websphere.runtime.CustomService;
|
| public class JCacheWAS51Service implements CustomService,
NotificationListener {
|
| public final static String NODE_PATH = "/GlobalCache";
|
| private final static String CACHE_INITIALIZED_KEY = "CacheInitialized";
|
| private TreeCache treeCache = null;
|
| private Log logger = LogFactory.getLog(getClass());
|
| private String jndiName = null;
|
| public void initialize(Properties configuration) throws Exception {
| String configFile = null;
| logger.info("JCacheWAS51Service.initialize(): starting up.");
| if (configuration != null && !configuration.isEmpty()) {
| if (logger.isDebugEnabled()) {
| configuration.list(System.out);
| }
| configFile = configuration.getProperty("configFile");
| if (configFile == null || configFile.trim().length() ==
0) {
| throw new InvalidArgumentException(
| "JCacheWAS51Service: configFile
configuration property is required.");
| }
| logger
|
.debug("JCacheWAS51Service.initialize(): Starting up TreeCache.");
| treeCache = new TreeCache();
| PropertyConfigurator configurator = new
PropertyConfigurator();
| configurator.configure(treeCache, configFile);
| treeCache.createService();
| treeCache.startService();
| logger
|
.debug("JCacheWAS51Service.initialize(): setting up filters to wait for WAS
startup.");
| NotificationFilterSupport filter = new
NotificationFilterSupport();
|
filter.enableType(NotificationConstants.TYPE_J2EE_STATE_RUNNING);
| ObjectName target = new
ObjectName("WebSphere:*,type=Server");
| AdminServiceFactory
| .getAdminService()
|
.addNotificationListenerExtended(target, this, filter, null);
| logger.info("JCacheWAS51Service.initialize():
waiting.");
| } else {
| logger.debug("JCacheWAS51Service.initialize(): not
configured.");
| }
|
| }
|
| public void shutdown() throws Exception {
| logger
| .info("JCacheWAS51Service.shutdown(): server is
stopping, shutting down cache.");
| if (treeCache != null) {
| treeCache.stopService();
| treeCache.destroyService();
| }
| }
|
| public void handleNotification(Notification arg0, Object arg1) {
| TransactionManager transaction = null;
| logger
| .info("JCacheWAS51Service.initialize(): server
has started, creating node.");
| try {
| logger
|
.info("JCacheWAS51Service.handleNotification(): TreeCache, creating initial
NODE_PATH ["
| + NODE_PATH + "].");
| transaction = treeCache.getTransactionManager();
| transaction.begin();
| Fqn nodeName = new Fqn(NODE_PATH);
| Boolean initialized = (Boolean) treeCache.get(nodeName,
| CACHE_INITIALIZED_KEY);
| if (initialized == null || initialized ==
Boolean.FALSE) {
| treeCache.put(nodeName, CACHE_INITIALIZED_KEY,
Boolean.TRUE);
| }
| transaction.commit();
| logger
|
.debug("JCacheWAS51Service.handleNotification: done with cache handling.");
| } catch (Exception error) {
| logger
|
.error("JCacheWAS51Service.handleNotification: error handling transaction,
message="
| + error.getMessage());
| try {
| transaction.rollback();
| } catch (SystemException warn) {
| logger.warn(warn);
| }
| }
| }
| }
|
|
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