org.xmlBlaster.engine.cluster
Class LoadBalancerPluginManager

java.lang.Object
  org.xmlBlaster.util.plugin.PluginManagerBase
      org.xmlBlaster.engine.cluster.LoadBalancerPluginManager

All Implemented Interfaces:

I_PluginManager

public class LoadBalancerPluginManager

extends PluginManagerBase

Loads the plugin to support cluster load balancing. Please register your plugins in xmlBlaster.properties, for example:

 LoadBalancerPlugin[MyLoadBalancer][1.0]=com.mycompany.MyLoadBalancer
 

Only one entry is allowed.

Field Summary

private ClusterManager	clusterManager
private static java.lang.String	defaultPluginName The default plugin "org.xmlBlaster.engine.cluster.simpledomain.RoundRobin" is loaded if not otherwise specified
private ServerScope	glob
static java.lang.String	pluginPropertyName

Fields inherited from class org.xmlBlaster.util.plugin.PluginManagerBase

NO_PLUGIN_TYPE

Constructor Summary

LoadBalancerPluginManager(ServerScope glob, ClusterManager clusterManager)

Method Summary

java.lang.String	getDefaultPluginName(java.lang.String type, java.lang.String version)
I_LoadBalancer	getPlugin(java.lang.String type, java.lang.String version) Return a specific plugin.
protected java.lang.String	getPluginPropertyName()
void	postInstantiate(I_Plugin plugin, PluginInfo pluginInfo) Is called after a plugin in instantiated, allows the base class to do specific actions.

Methods inherited from class org.xmlBlaster.util.plugin.PluginManagerBase

createPluginPropertyKey, getDummyPlugin, getFromPluginCache, getGlobal, getName, getPluginObject, getPluginObject, getPluginObject, ignorePlugin, instantiatePlugin, instantiatePlugin, removeFromPluginCache, shutdown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

defaultPluginName

private static final java.lang.String defaultPluginName

The default plugin "org.xmlBlaster.engine.cluster.simpledomain.RoundRobin" is loaded if not otherwise specified

See Also:

Constant Field Values

pluginPropertyName

public static final java.lang.String pluginPropertyName

See Also:

Constant Field Values

glob

private final ServerScope glob

clusterManager

private final ClusterManager clusterManager

Constructor Detail

LoadBalancerPluginManager

public LoadBalancerPluginManager(ServerScope glob,
                                 ClusterManager clusterManager)

Method Detail

getPlugin

public I_LoadBalancer getPlugin(java.lang.String type,
                                java.lang.String version)
                         throws XmlBlasterException

Return a specific plugin.

Returns:

The load balancer for this type and version or null if none is specified

Throws:

XmlBlasterException

postInstantiate

public void postInstantiate(I_Plugin plugin,
                            PluginInfo pluginInfo)

Description copied from class: PluginManagerBase

Is called after a plugin in instantiated, allows the base class to do specific actions. Is NOT called when plugin got from cache.

Overrides:

postInstantiate in class PluginManagerBase

getPluginPropertyName

protected java.lang.String getPluginPropertyName()

Overrides:

getPluginPropertyName in class PluginManagerBase

Returns:

The name of the property in xmlBlaster.property "LoadBalancerPlugin" for "LoadBalancerPlugin[RoundRobin][1.0]"

getDefaultPluginName

public java.lang.String getDefaultPluginName(java.lang.String type,
                                             java.lang.String version)

Specified by:

getDefaultPluginName in interface I_PluginManager

Overrides:

getDefaultPluginName in class PluginManagerBase

Parameters:

type - can be null

version - can be null

Returns:

please return your default plugin classname or null if not specified