simpletcpcluster.java

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     * remove message listener and deregister Cluster from listener
     * 
     * @see org.apache.catalina.ha.CatalinaCluster#removeClusterListener(org.apache.catalina.ha.MessageListener)
     */
    public void removeClusterListener(ClusterListener listener) {
        if (listener != null) {
            clusterListeners.remove(listener);
            listener.setCluster(null);
        }
    }

    /**
     * get current Deployer
     */
    public org.apache.catalina.ha.ClusterDeployer getClusterDeployer() {
        return clusterDeployer;
    }

    /**
     * set a new Deployer, must be set before cluster started!
     */
    public void setClusterDeployer(
            org.apache.catalina.ha.ClusterDeployer clusterDeployer) {
        this.clusterDeployer = clusterDeployer;
    }

    public void setChannel(Channel channel) {
        this.channel = channel;
    }

    /**
     * has members
     */
    public boolean hasMembers() {
        return channel.hasMembers();
    }
    
    /**
     * Get all current cluster members
     * @return all members or empty array 
     */
    public Member[] getMembers() {
        return channel.getMembers();
    }

    /**
     * Return the member that represents this node.
     * 
     * @return Member
     */
    public Member getLocalMember() {
        return channel.getLocalMember(true);
    }

    // ------------------------------------------------------------- dynamic
    // manager property handling

    /**
     * JMX hack to direct use at jconsole
     * 
     * @param name
     * @param value
     */
    public void setProperty(String name, String value) {
        setProperty(name, (Object) value);
    }

    /**
     * set config attributes with reflect and propagate to all managers
     * 
     * @param name
     * @param value
     */
    public void setProperty(String name, Object value) {
        if (log.isTraceEnabled())
            log.trace(sm.getString("SimpleTcpCluster.setProperty", name, value,
                    properties.get(name)));

        properties.put(name, value);
        if(started) {
            // FIXME Hmm, is that correct when some DeltaManagers are direct configured inside Context?
            // Why we not support it for other elements, like sender, receiver or membership?
            // Must we restart element after change?
            if (name.startsWith("manager")) {
                String key = name.substring("manager".length() + 1);
                String pvalue = value.toString();
                for (Iterator iter = managers.values().iterator(); iter.hasNext();) {
                    Manager manager = (Manager) iter.next();
                    if(manager instanceof DeltaManager && ((ClusterManager) manager).isDefaultMode()) {
                        IntrospectionUtils.setProperty(manager, key, pvalue );
                    }
                }
            } 
        }
    }

    /**
     * get current config
     * 
     * @param key
     * @return The property
     */
    public Object getProperty(String key) {
        if (log.isTraceEnabled())
            log.trace(sm.getString("SimpleTcpCluster.getProperty", key));
        return properties.get(key);
    }

    /**
     * Get all properties keys
     * 
     * @return An iterator over the property names.
     */
    public Iterator getPropertyNames() {
        return properties.keySet().iterator();
    }

    /**
     * remove a configured property.
     * 
     * @param key
     */
    public void removeProperty(String key) {
        properties.remove(key);
    }

    /**
     * transfer properties from cluster configuration to subelement bean.
     * @param prefix
     * @param bean
     */
    protected void transferProperty(String prefix, Object bean) {
        if (prefix != null) {
            for (Iterator iter = getPropertyNames(); iter.hasNext();) {
                String pkey = (String) iter.next();
                if (pkey.startsWith(prefix)) {
                    String key = pkey.substring(prefix.length() + 1);
                    Object value = getProperty(pkey);
                    IntrospectionUtils.setProperty(bean, key, value.toString());
                }
            }
        }
    }

    // --------------------------------------------------------- Public Methods

    /**
     * @return Returns the managers.
     */
    public Map getManagers() {
        return managers;
    }

    public Channel getChannel() {
        return channel;
    }

    /**
     * Create new Manager without add to cluster (comes with start the manager)
     * 
     * @param name
     *            Context Name of this manager
     * @see org.apache.catalina.Cluster#createManager(java.lang.String)
     * @see #addManager(String, Manager)
     * @see DeltaManager#start()
     */
    public synchronized Manager createManager(String name) {
        if (log.isDebugEnabled()) log.debug("Creating ClusterManager for context " + name + " using class " + getManagerClassName());
        Manager manager = null;
        try {
            manager = (Manager) getClass().getClassLoader().loadClass(getManagerClassName()).newInstance();
        } catch (Exception x) {
            log.error("Unable to load class for replication manager", x);
            manager = new org.apache.catalina.ha.session.DeltaManager();
        } finally {
            if(manager != null) {
                manager.setDistributable(true);
                if (manager instanceof ClusterManager) {
                    ClusterManager cmanager = (ClusterManager) manager ;
                    cmanager.setDefaultMode(true);
                    cmanager.setName(getManagerName(name,manager));
                    cmanager.setCluster(this);
                }
            }
        }
        return manager;
    }

    /**
     * remove an application form cluster replication bus
     * 
     * @see org.apache.catalina.ha.CatalinaCluster#removeManager(java.lang.String,Manager)
     */
    public void removeManager(String name,Manager manager) {
        if (manager != null) {
            // Notify our interested LifecycleListeners
            lifecycle.fireLifecycleEvent(BEFORE_MANAGERUNREGISTER_EVENT,manager);
            managers.remove(getManagerName(name,manager));
            if (manager instanceof ClusterManager) ((ClusterManager) manager).setCluster(null);
            // Notify our interested LifecycleListeners
            lifecycle.fireLifecycleEvent(AFTER_MANAGERUNREGISTER_EVENT, manager);
        }
    }

    /**
     * add an application to cluster replication bus
     * 
     * @param name
     *            of the context
     * @param manager
     *            manager to register
     * @see org.apache.catalina.ha.CatalinaCluster#addManager(java.lang.String,
     *      org.apache.catalina.Manager)
     */
    public void addManager(String name, Manager manager) {
        if (!manager.getDistributable()) {
            log.warn("Manager with name " + name + " is not distributable, can't add as cluster manager");
            return;
        }
        // Notify our interested LifecycleListeners
        lifecycle.fireLifecycleEvent(BEFORE_MANAGERREGISTER_EVENT, manager);
        String clusterName = getManagerName(name, manager);
        if (manager instanceof ClusterManager) {
            ClusterManager cmanager = (ClusterManager) manager ;
            cmanager.setName(clusterName);
            cmanager.setCluster(this);
            if(cmanager.isDefaultMode()) transferProperty("manager",cmanager);
        }
        managers.put(clusterName, manager);
        // Notify our interested LifecycleListeners
        lifecycle.fireLifecycleEvent(AFTER_MANAGERREGISTER_EVENT, manager);
    }

    /**
     * @param name
     * @param manager
     * @return
     */
    public String getManagerName(String name, Manager manager) {
        String clusterName = name ;
        if(getContainer() instanceof Engine) {
            Container context = manager.getContainer() ;
            if(context != null && context instanceof Context) {
                Container host = ((Context)context).getParent();
                if(host != null && host instanceof Host)
                    clusterName = host.getName()  + name ;
            }
        }
        return clusterName;
    }

    /*
     * Get Manager
     * 
     * @see org.apache.catalina.ha.CatalinaCluster#getManager(java.lang.String)
     */
    public Manager getManager(String name) {
        return (Manager) managers.get(name);
    }
    
    // ------------------------------------------------------ Lifecycle Methods

    /**
     * Execute a periodic task, such as reloading, etc. This method will be
     * invoked inside the classloading context of this container. Unexpected
     * throwables will be caught and logged.
     * @see org.apache.catalina.ha.deploy.FarmWarDeployer#backgroundProcess()
     * @see ReplicationTransmitter#backgroundProcess()
     */
    public void backgroundProcess() {
        if (clusterDeployer != null) clusterDeployer.backgroundProcess();
        //send a heartbeat through the channel
        if ( channel !=null ) channel.heartbeat();
    }

    /**
     * Add a lifecycle event listener to this component.
     * 
     * @param listener
     *            The listener to add
     */
    public void addLifecycleListener(LifecycleListener listener) {
        lifecycle.addLifecycleListener(listener);
    }

    /**
     * Get the lifecycle listeners associated with this lifecycle. If this
     * Lifecycle has no listeners registered, a zero-length array is returned.
     */
    public LifecycleListener[] findLifecycleListeners() {

        return lifecycle.findLifecycleListeners();

    }

    /**
     * Remove a lifecycle event listener from this component.
     * 
     * @param listener
     *            The listener to remove
     */
    public void removeLifecycleListener(LifecycleListener listener) {
        lifecycle.removeLifecycleListener(listener);
    }

    /**
     * Use as base to handle start/stop/periodic Events from host. Currently
     * only log the messages as trace level.
     *