/// <summary>Register a listener for jobs life cycle notifications emitted by the server</summary>
/// <param name="client">The JPPF client from which to get a JMX connection</param>
public static void RegisterJobNotificationListener(JPPFClient client)
{
JMXDriverConnectionWrapper jmx = GetJMXConnection(client);
AbstractMBeanStaticProxy jobProxy = new DriverJobManagementMBeanStaticProxy(jmx);
jobProxy.AddNotificationListener(new MyJobNotificationListener(), "job notification");
}
/// <summary>Register a listener which forward node notifications via the driver</summary>
/// <param name="jmx">holds the connection to the driver's JMX server</param>
/// <param name="selector">specifies the nodes from which notifications are forwarded</param>
/// <param name="mbeanName">the name of the node MBean for which notifications are forwarded</param>
/// <param name="listener">the listener to register</param>
/// <param name="handback">an arbitrary object provided when the listerner was registered</param>
/// <returns>A unique id under which the listener is registered</returns>
public static string RegisterFowrwardingNotificationListener(this JMXDriverConnectionWrapper jmx, NodeSelector selector, string mbeanName, BaseDotnetNotificationListener listener, object handback)
{
NotificationListener javaListener = new DotnetNotificationListenerWrapper(new DotnetNotificationDispatcher(listener, handback));
String id = jmx.registerForwardingNotificationListener(selector, mbeanName, javaListener, null, null);
//Console.WriteLine("added forwarding notification listener " + listener + " to " + jmx + " with id=" + id);
return(id);
}
/// <summary>Print the number of nodes connected to the server</summary>
/// <param name="client">The JPPF client connected to the server</param>
public static void PrintNbNodes(JPPFClient client)
{
JMXDriverConnectionWrapper jmx = GetJMXConnection(client);
java.lang.Integer n = jmx.nbNodes();
int nbNodes = (n == null) ? 0 : n.intValue();
Console.WriteLine("there are " + nbNodes + " nodes");
}
/// <summary>Obtain a JMX connection from a JPPF client</summary>
/// <param name="client">The client to get the JMX connection from</param>
/// <returns>An instance of <code>JMXDriverConnectionWrapper</code></returns>
public static JMXDriverConnectionWrapper GetJMXConnection(JPPFClient client)
{
if (jmx == null)
{
// wait for a connection pool to be ready
JPPFConnectionPool pool = client.awaitWorkingConnectionPool();
// wait until at least one JMX connection is available from the pool
java.util.List list = pool.awaitJMXConnections(Operator.AT_LEAST, 1, true);
// return the first available JMX connection
jmx = (JMXDriverConnectionWrapper)list.get(0);
}
return(jmx);
}
/// <summary>Register a listener for tasks completion notifications emitted by all the nodes</summary>
/// <param name="client">The JPPF client from which to get a JMX connection</param>
/// <returns>An id string assigned to the registered listener</returns>
public static string RegisterTaskNotificationListener(JPPFClient client)
{
// name of the node task monitor MBean
string mbeanName = JPPFNodeTaskMonitorMBeanStaticProxy.getMBeanName();
// only receive notifications from .Net-capable nodes
ExecutionPolicy dotnetPolicy = new Equal("jppf.dotnet.bridge.initialized", true);
NodeSelector selector = new ExecutionPolicySelector(dotnetPolicy);
// register the forwarding listener with the driver
JMXDriverConnectionWrapper jmx = GetJMXConnection(client);
string listenerId = jmx.RegisterFowrwardingNotificationListener(selector, mbeanName, new MyTaskNotificationListener(), "task notification");
Console.WriteLine("registered task notifications listener with listenerId = " + listenerId);
// return the listener id so it can be eventually removed later
return(listenerId);
}
/// <summary>Provision the specified number of slave nodes.
/// This method forwards the provisioning request to all relevant nodes via the driver</summary>
/// <param name="client">The JPPF client connected to the server</param>
/// <param name="nbNodes">The number of slave nodes to provision</param>
public static void ProvisionNodes(JPPFClient client, int nbNodes)
{
// we are invoking the remote provisioning mbeans
string mbeanName = JPPFNodeProvisioningMBeanStaticProxy.getMBeanName();
// policy applied on master nodes with a .Net bridge initialized
ExecutionPolicy masterPolicy = new Equal("jppf.node.provisioning.master", true).and(new Equal("jppf.dotnet.bridge.initialized", true));
NodeSelector masterSelector = new ExecutionPolicySelector(masterPolicy);
// parameters to the MBean method
java.lang.Object[] parameters = { new java.lang.Integer(nbNodes), null };
// Java signature of the remote MBean method to invoke
java.lang.String[] signature = { "int", "org.jppf.utils.TypedProperties" };
// send the request via the forwarding mbean
JMXDriverConnectionWrapper jmx = GetJMXConnection(client);
JPPFNodeForwardingMBeanStaticProxy proxy = new JPPFNodeForwardingMBeanStaticProxy(jmx);
proxy.forwardInvoke(masterSelector, mbeanName, "provisionSlaveNodes", parameters, signature);
}
