Examples of org.rioproject.impl.client.DiscoveryManagementPool

org.rioproject.impl.client.DiscoveryManagementPool
A strategy has been taken in an attempt to conserve resources in a multi-service JVM environment as it relates to DiscoveryManagement. The DiscoveryManagementPool class provides an approach that enables a caller to get an existing DiscoveryManagement instance from a pool of previously created DiscoveryManagement instances, instead of creating a new DiscoveryManagement instance, and going through the overhead of DiscoveryManagement creation and performing discovery each time a service is initialized.
The criteria for pooling of created DiscoveryManagement instances is to match groups, locators and a shared name. The default behavior for ServiceBeans is to use the OperationalString name as the shared name. Therefore all services instantiated in the same Cybernode, that are in the same OperationalString, which have the same DiscoveryManagement groups and locators, will share the same DiscoveryManagement instance.
Of course use of shared DiscoveryManagement instances must be used with care as changing the settings of a shared DiscoveryManagement instance may present problems for other users of that DiscoveryManagement instance.
As a deployer, if you want DiscoveryManagement sharing turned off for services, declaring the following will turn it off:

<ServiceBean Name="Does not share well" DiscoveryManagementPooling="no"> @author Dennis Reedy

     * @see org.rioproject.servicebean.ServiceBeanContext#getDiscoveryManagement()
     */
    public DiscoveryManagement getDiscoveryManagement() throws IOException {
        if(serviceDiscoMgmt == null) {
            logger.trace("Create DiscoveryManagement for {}/{}", sElem.getOperationalStringName(), sElem.getName());
            DiscoveryManagementPool discoPool = DiscoveryManagementPool.getInstance();


            String locatorString = System.getProperty(Constants.LOCATOR_PROPERTY_NAME);
            List<LookupLocator> locators = new ArrayList<LookupLocator>();
            if(sElem.getServiceBeanConfig().getLocators()!=null)
                locators.addAll(
                    Arrays.asList(sElem.getServiceBeanConfig().getLocators()));


            if(locatorString!=null) {
                LookupLocator[] systemLocators = JiniClient.parseLocators(locatorString);
                if(locators.isEmpty()) {
                    locators.addAll(Arrays.asList(systemLocators));
                } else {
                    List<LookupLocator> toAdd = new ArrayList<LookupLocator>();
                    for(LookupLocator lookLoc : systemLocators) {
                        boolean add = true;
                        for(LookupLocator ll : locators) {
                            if(ll.equals(lookLoc)) {
                                add = false;
                                break;
                            }
                        }
                        if(add)
                            toAdd.add(lookLoc);
                    }
                    for(LookupLocator ll : toAdd)
                        locators.add(ll);
                }
            }
            LookupLocator[] locatorsToUse = locators.isEmpty()?null:
                                            locators.toArray(new LookupLocator[locators.size()]);
            if(sElem.getDiscoveryManagementPooling()) { 
                serviceDiscoMgmt = discoPool.getDiscoveryManager(getOperationalStringName(),
                                                                 sElem.getServiceBeanConfig().getGroups(),
                                                                 locatorsToUse);
            } else {
                Configuration discoConfig = null;
                try {
                    discoConfig = getConfiguration();
                } catch(ConfigurationException e) {
                    logger.trace("Getting Configuration while creating DiscoveryManagement", e);
                }
                serviceDiscoMgmt = discoPool.getDiscoveryManager(serviceBeanManager.getServiceID().toString(),
                                                                 sElem.getServiceBeanConfig().getGroups(),
                                                                 locatorsToUse,
                                                                 null,
                                                                 discoConfig);
            }

View Full Code Here

            if(instances!=null) {
                for (ServiceBeanInstance instance : instances) {
                    addServiceBeanInstance(instance);
                }
            }
            DiscoveryManagementPool discoPool = DiscoveryManagementPool.getInstance();
            DiscoveryManagement dm = discoPool.getDiscoveryManager(svcElement.getOperationalStringName(),
                                                                   svcElement.getServiceBeanConfig().getGroups(),
                                                                   svcElement.getServiceBeanConfig().getLocators());
            ServiceTemplate template;
            if(svcElement.getMatchOnName())
                template = new ServiceTemplate(null, interfaces, new Entry[]{new Name(svcElement.getName())});

View Full Code Here

        LookupServiceHandler(final AssociationDescriptor aDesc,
                             final AssociationHandler handler,
                             final Configuration config) {
            this.handler = handler;
            try {
                DiscoveryManagementPool discoPool = DiscoveryManagementPool.getInstance();
                dm = discoPool.getDiscoveryManager(aDesc.getOperationalStringName(),
                                                   aDesc.getGroups(),
                                                   aDesc.getLocators());
                dm.addDiscoveryListener(this);
                proxyPreparer = (ProxyPreparer)config.getEntry(CONFIG_COMPONENT,
                                                               "proxyPreparer",

View Full Code Here

                    logger.warn("Unregistering PlatformCapability [{}]", pCap.getName(), e);
                }
            }
        }
        /* Terminate the DiscoveryManagementPool */
        DiscoveryManagementPool discoPool = DiscoveryManagementPool.getInstance();
        if(discoPool!=null)
            discoPool.terminate();


        /* Tell the utility that started the Cybernode we are going away */
        ServiceBeanManager serviceBeanManager = context.getServiceBeanManager();
        if(serviceBeanManager!=null) {
            DiscardManager discardMgr = serviceBeanManager.getDiscardManager();

View Full Code Here

                                                            ProxyPreparer.class,
                                                            new BasicProxyPreparer());
        int serviceInfoPoolSize = (Integer) config.getEntry(CLI.CONFIG_COMPONENT, "serviceInfoPoolSize", int.class, 5);
        serviceInfoFetchPool = Executors.newFixedThreadPool(serviceInfoPoolSize);


        DiscoveryManagementPool discoPool = DiscoveryManagementPool.getInstance();
        DiscoveryManagement discoMgr = discoPool.getDiscoveryManager("cli", groups, locators, null, config);
        //LookupDiscoveryManager discoMgr =
        //    new LookupDiscoveryManager(groups, locators, null, lookupConfig);
        recordingDiscoveryListener = new RecordingDiscoveryListener(discoMgr);
        discoMgr.addDiscoveryListener(recordingDiscoveryListener);
        sdm = new ServiceDiscoveryManager(discoMgr, new LeaseRenewalManager());

View Full Code Here

TOP

Related Classes of org.rioproject.impl.client.DiscoveryManagementPool

net.jini.config.Configuration

net.jini.discovery.LookupDiscoveryManager

org.rioproject.cybernode.service.CybernodeImpl

org.rioproject.impl.associations.DefaultAssociationManagement$LookupServiceHandler

org.rioproject.impl.servicebean.DefaultServiceBeanContext

org.rioproject.monitor.service.ServiceElementManager

org.rioproject.tools.cli.ServiceFinder

java.lang.reflect.Constructor

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.