Package flex.messaging

Source Code of flex.messaging.MessageDestination

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package flex.messaging;

import flex.management.runtime.messaging.MessageDestinationControl;
import flex.management.runtime.messaging.services.messaging.SubscriptionManagerControl;
import flex.management.runtime.messaging.services.messaging.ThrottleManagerControl;
import flex.messaging.config.ConfigurationException;
import flex.messaging.config.DestinationSettings;
import flex.messaging.config.ThrottleSettings;
import flex.messaging.config.ConfigMap;
import flex.messaging.config.NetworkSettings;
import flex.messaging.config.ServerSettings;
import flex.messaging.log.Log;
import flex.messaging.log.LogCategories;
import flex.messaging.services.MessageService;
import flex.messaging.services.Service;
import flex.messaging.services.messaging.SubscriptionManager;
import flex.messaging.services.messaging.RemoteSubscriptionManager;
import flex.messaging.services.messaging.ThrottleManager;
import flex.messaging.services.messaging.MessagingConstants;

/**
* A logical reference to a MessageDestination.
*
* @author neville
*/
public class MessageDestination extends FactoryDestination
{
    static final long serialVersionUID = -2016911808141319012L;

    /** Log category for <code>MessageDestination</code>.*/
    public static final String LOG_CATEGORY = LogCategories.SERVICE_MESSAGE;

    // Errors
    private static final int UNSUPPORTED_POLICY = 10124;

    // Destination properties
    private ServerSettings serverSettings;

    // Destination internal
    private SubscriptionManager subscriptionManager;
    private RemoteSubscriptionManager remoteSubscriptionManager;
    private ThrottleManager throttleManager;

    private MessageDestinationControl controller;

    //--------------------------------------------------------------------------
    //
    // Constructor
    //
    //--------------------------------------------------------------------------

    /**
     * Constructs an unmanaged <code>MessageDestination</code> instance.
     */
    public MessageDestination()
    {
        this(false);
    }

    /**
     * Constructs a <code>MessageDestination</code> with the indicated management.
     *
     * @param enableManagement <code>true</code> if the <code>MessageDestination</code>
     * is manageable; otherwise <code>false</code>.
     */
    public MessageDestination(boolean enableManagement)
    {
        super(enableManagement);

        serverSettings = new ServerSettings();

        // Managers
        subscriptionManager = new SubscriptionManager(this);
        remoteSubscriptionManager = new RemoteSubscriptionManager(this);
        throttleManager = new ThrottleManager();
    }

    //--------------------------------------------------------------------------
    //
    // Initialize, validate, start, and stop methods.
    //
    //--------------------------------------------------------------------------

    /**
     * Initializes the <code>MessageDestination</code> with the properties.
     * If subclasses override, they must call <code>super.initialize()</code>.
     *
     * @param id The id of the destination.
     * @param properties Properties for the <code>MessageDestination</code>.
     */
    public void initialize(String id, ConfigMap properties)
    {
        super.initialize(id, properties);

        if (properties == null || properties.size() == 0)
            return;

        // Network properties
        network(properties);

        // Server properties
        server(properties);
    }

    /**
     * This method first calls stop on its superclass and then cleans up the SubscriptionManager.
     */
    public void stop()
    {
        // Stop all the managers first.
        subscriptionManager.stop();
        remoteSubscriptionManager.stop();
        throttleManager.stop();

        super.stop();
    }

    //--------------------------------------------------------------------------
    //
    // Public Getters and Setters for Destination properties
    //
    //--------------------------------------------------------------------------

    /**
     * Sets the <code>NetworkSettings</code> of the <code>MessageDestination</code>.
     *
     * @param networkSettings The <code>NetworkSettings</code> of the <code>MessageDestination</code>
     */
    public void setNetworkSettings(NetworkSettings networkSettings)
    {
        super.setNetworkSettings(networkSettings);

        // Set throttle and subscription manager settings if needed
        if (networkSettings.getThrottleSettings() != null)
        {
            ThrottleSettings settings = networkSettings.getThrottleSettings();
            settings.setDestinationName(getId());
            throttleManager.setThrottleSettings(settings);
        }
        if (networkSettings.getSubscriptionTimeoutMinutes() > 0)
        {
            long subscriptionTimeoutMillis = networkSettings.getSubscriptionTimeoutMinutes() * 60 * 1000; // Convert to millis.
            subscriptionManager.setSubscriptionTimeoutMillis(subscriptionTimeoutMillis);
        }
    }

    /**
     * Returns the <code>ServerSettings</code> of the <code>MessageDestination</code>.
     *
     * @return The <code>ServerSettings</code> of the <code>MessageDestination</code>.
     */
    public ServerSettings getServerSettings()
    {
        return serverSettings;
    }

    /**
     * Sets the <code>ServerSettings</code> of the <code>MessageDestination</code>.
     *
     * @param serverSettings The <code>ServerSettings</code> of the <code>MessageDestination</code>
     */
    public void setServerSettings(ServerSettings serverSettings)
    {
        this.serverSettings = serverSettings;
    }

    /**
     * Casts the <code>Service</code> into <code>MessageService</code>
     * and calls super.setService.
     *
     * @param service The <code>Service</code> managing this <code>Destination</code>.
     */
    public void setService(Service service)
    {
        MessageService messageService = (MessageService)service;
        super.setService(messageService);
    }

    //--------------------------------------------------------------------------
    //
    // Other public APIs
    //
    //--------------------------------------------------------------------------

    /** @exclude */
    public SubscriptionManager getSubscriptionManager()
    {
        return subscriptionManager;
    }

    /** @exclude */
    public RemoteSubscriptionManager getRemoteSubscriptionManager()
    {
        return remoteSubscriptionManager;
    }

    /** @exclude */
    public ThrottleManager getThrottleManager()
    {
        return throttleManager;
    }

    /** @exclude **/
    public boolean equals(Object o)
    {
        if (o instanceof Destination)
        {
            Destination d = (Destination)o;
            if (d != null && d.getServiceType().equals(getServiceType()) && d.getId().equals(getId()))
            {
                return true;
            }
        }
        return false;
    }

    /** @exclude **/
    public int hashCode()
    {
        return (getServiceType() == null ? 0 : getServiceType().hashCode()) * 100003 +
            (getId() == null ? 0 : getId().hashCode());
    }

    /** @exclude **/
    public String toString()
    {
        return getServiceType() + "#" + getId();
    }

    //--------------------------------------------------------------------------
    //
    // Protected/private APIs
    //
    //--------------------------------------------------------------------------

    protected void network(ConfigMap properties)
    {
        ConfigMap network = properties.getPropertyAsMap(NetworkSettings.NETWORK_ELEMENT, null);
        if (network != null)
        {
            // Get implementation specific network settings, including subclasses!
            NetworkSettings ns = getNetworkSettings();

            // Subscriber timeout; first check for subscription-timeout-minutes and fallback to legacy session-timeout.
            int useLegacyPropertyToken = -999999;
            int subscriptionTimeoutMinutes = network.getPropertyAsInt(NetworkSettings.SUBSCRIPTION_TIMEOUT_MINUTES, useLegacyPropertyToken);
            if (subscriptionTimeoutMinutes == useLegacyPropertyToken)
                subscriptionTimeoutMinutes = network.getPropertyAsInt(NetworkSettings.SESSION_TIMEOUT, NetworkSettings.DEFAULT_TIMEOUT);
            ns.setSubscriptionTimeoutMinutes(subscriptionTimeoutMinutes);

            // Throttle Settings
            throttle(ns.getThrottleSettings(), network);

            setNetworkSettings(ns);
        }
    }

    protected void throttle(ThrottleSettings ts, ConfigMap network)
    {
        ConfigMap inbound = network.getPropertyAsMap(ThrottleSettings.ELEMENT_INBOUND, null);
        if (inbound != null)
        {
            int policy = getPolicyFromThrottleSettings(inbound);
            ts.setInboundPolicy(policy);
            int destFreq = inbound.getPropertyAsInt(ThrottleSettings.ELEMENT_DEST_FREQ, 0);
            ts.setIncomingDestinationFrequency(destFreq);
            int clientFreq = inbound.getPropertyAsInt(ThrottleSettings.ELEMENT_CLIENT_FREQ, 0);
            ts.setIncomingClientFrequency(clientFreq);
        }

        ConfigMap outbound = network.getPropertyAsMap(ThrottleSettings.ELEMENT_OUTBOUND, null);
        if (outbound != null)
        {
            int policy = getPolicyFromThrottleSettings(outbound);
            ts.setOutboundPolicy(policy);
            int destFreq = outbound.getPropertyAsInt(ThrottleSettings.ELEMENT_DEST_FREQ, 0);
            ts.setOutgoingDestinationFrequency(destFreq);
            int clientFreq = outbound.getPropertyAsInt(ThrottleSettings.ELEMENT_CLIENT_FREQ, 0);
            ts.setOutgoingClientFrequency(clientFreq);
        }
    }

    private int getPolicyFromThrottleSettings(ConfigMap settings)
    {
        String policyString = settings.getPropertyAsString(ThrottleSettings.ELEMENT_POLICY, null);
        int policy = ThrottleSettings.POLICY_NONE;
        if (policyString == null)
            return policy;
        try
        {
            policy = ThrottleSettings.parsePolicy(policyString);
            if (policy == ThrottleSettings.POLICY_REPLACE)
            {
                if (Log.isWarn())
                {
                    Log.getLogger(getLogCategory()).warn("Throttle outbound policy '{0}' found on message destination '{1}'."
                            + " The '{0}' throttle outbound policy has been deprecated. Please remove it from your configuration file.",
                            new Object[]{"REPLACE", id});
                }
            }
        }
        catch (ConfigurationException exception)
        {
            ConfigurationException ce = new ConfigurationException();
            ce.setMessage(UNSUPPORTED_POLICY, new Object[] {getId(), policyString});
            throw ce;
        }
        return policy;
    }

    protected void server(ConfigMap properties)
    {
        ConfigMap server = properties.getPropertyAsMap(DestinationSettings.SERVER_ELEMENT, null);
        if (server != null)
        {
            int max = server.getPropertyAsInt(MessagingConstants.MAX_CACHE_SIZE_ELEMENT, MessagingConstants.DEFAULT_MAX_CACHE_SIZE);
            serverSettings.setMaxCacheSize(max);

            long ttl = server.getPropertyAsLong(MessagingConstants.TIME_TO_LIVE_ELEMENT, -1);
            serverSettings.setMessageTTL(ttl);

            boolean durable = server.getPropertyAsBoolean(MessagingConstants.IS_DURABLE_ELEMENT, false);
            serverSettings.setDurable(durable);

            boolean allowSubtopics = server.getPropertyAsBoolean(MessagingConstants.ALLOW_SUBTOPICS_ELEMENT, false);
            serverSettings.setAllowSubtopics(allowSubtopics);

            String subtopicSeparator = server.getPropertyAsString(MessagingConstants.SUBTOPIC_SEPARATOR_ELEMENT, MessagingConstants.DEFAULT_SUBTOPIC_SEPARATOR);
            serverSettings.setSubtopicSeparator(subtopicSeparator);

            String routingMode = server.getPropertyAsString(MessagingConstants.CLUSTER_MESSAGE_ROUTING, "server-to-server");
            serverSettings.setBroadcastRoutingMode(routingMode);
        }
    }

    /**
     * Returns the log category of the <code>MessageDestination</code>.
     *
     * @return The log category of the component.
     */
    protected String getLogCategory()
    {
        return LOG_CATEGORY;
    }

    /**
     * Invoked automatically to allow the <code>MessageDestination</code> to setup its corresponding
     * MBean control.
     *
     * @param service The <code>Service</code> that manages this <code>MessageDestination</code>.
     */
    protected void setupDestinationControl(Service service)
    {
        controller = new MessageDestinationControl(this, service.getControl());
        controller.register();
        setControl(controller);
        setupThrottleManagerControl(controller);
        setupSubscriptionManagerControl(controller);
    }


    private void setupThrottleManagerControl(MessageDestinationControl destinationControl)
    {
        ThrottleManagerControl throttleManagerControl = new ThrottleManagerControl(getThrottleManager(), destinationControl);
        throttleManagerControl.register();
        getThrottleManager().setControl(throttleManagerControl);
        getThrottleManager().setManaged(true);
        destinationControl.setThrottleManager(throttleManagerControl.getObjectName());
    }

    private void setupSubscriptionManagerControl(MessageDestinationControl destinationControl)
    {
        SubscriptionManagerControl subscriptionManagerControl = new SubscriptionManagerControl(getSubscriptionManager(), destinationControl);
        subscriptionManagerControl.register();
        getSubscriptionManager().setControl(subscriptionManagerControl);
        getSubscriptionManager().setManaged(true);
        destinationControl.setSubscriptionManager(subscriptionManagerControl.getObjectName());
    }
}
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