Retrieving actual state

To retrieve the actual operational state of a node, use the following rhino-console command or related MBean operation. For an explanation of the terms "actual state" and "desired state" see bxref:concepts-and-terminology.

Console command: getsleeactualstate

Command

 
getsleeactualstate <-all|-nodes node1,node2,...>
  Description
    Get the actual SLEE state for the specified nodes. If -all is specified, query
    the state of all current event router cluster members.

Output

The rhino-console client displays the actual operational state of the specified node(s), or every event-router node in the primary component if -all is specified.

Examples

To display the actual state of only node 101:

$ ./rhino-console getsleeactualstate -nodes 101
Node 101: Stopped

To display the actual state of every event-router node:

$ ./rhino-console getsleeactualstate -all
Getting desired SLEE state for node(s) [101,102]
Node 101: Stopped
Node 102: Running

MBean operation: getActualState

MBean

SLEE Management

Rhino extension
Return actual state of a set of nodes
public SleeActualState getActualState(int[] nodeIDs)
  throws ManagementException;

Retrieving desired state

To retrieve the desired operational state of a node, use the following rhino-console command or related MBean operation.

Console command: getsleedesiredstate

Command

 
getsleedesiredstate <-default|-all|-nodes node1,node2,...>
  Description
    Get the default or per-node desired SLEE state. If -all is specified, query the
    state of all current event router nodes as well as all nodes with saved per-node
    state.

Output

The rhino-console client displays the desired state of the specified node(s), or every node with configured state and every event-router node in the primary component if -all is specified.

Examples

To display the desired state of only node 101:

$ ./rhino-console getsleedesiredstate -nodes 101
Node 101: Stopped

To display the desired state of every event-router node and configured node:

$ ./rhino-console getsleedesiredstate -all
Node 101: Stopped
Node 102: Running (default)
Node 103: Running

To display the default desired state that unconfigured event router nodes will inherit:

$ ./rhino-console getsleedesiredstate -default
Getting default SLEE state
Default SLEE state is: running

MBean operation: getPerNodeDesiredState

MBean

SLEE Management

Rhino extension
Return desired state of a set of nodes
public SleeActualState getPerNodeDesiredState(int[] nodeIDs)
  throws ManagementException;

MBean operation: getDefaultDesiredState

MBean

SLEE Management

Rhino extension
Return the default desired state used by nodes that do not have a configured per-node state
public SleeActualState getDefaultDesiredState()
  throws ManagementException;

Retrieving SLEE-defined state

To retrieve the basic operational state of a node in a form compatible with the JAIN SLEE specification, use the following rhino-console command or related MBean operation.

Console command: state

Command

 
state [-nodes node1,node2,...]
  Description
    Get the state of the SLEE (on the specified nodes)

Output

The rhino-console client displays the operational state of the specified node(s), or every event-router node in the primary component if none are specified.

Examples

To display the state of only node 101:

$ ./rhino-console state -nodes 101
Node 101 is Stopped

To display the state of every event-router node:

$ ./rhino-console state
Node 101 is Stopped
Node 102 is Running

MBean operation: getState

MBean

SLEE Management

SLEE-defined
Return state of current node
public SleeState getState()
  throws ManagementException;

Rhino’s implementation of the SLEE-defined getState operation returns the SLEE defined state most closely representative of the actual state the SLEE on the node the invoking client is connected to. When using the Rhino client library with a list of hosts this will usually be the node on the first host in the list. When multiple nodes are running on the same host, the oldest node on the host will usually expose the management interface and thus be the target of this query.

Note

Since Rhino 3.0.0 the actual state of components on each node can update asynchronously. This differs from symmetric activation state mode in earlier Rhino versions in that the value returned by getState() is not representative of the state on other cluster nodes. Users of this method who previously configured symmetric activation state mode should switch to checking the state of all nodes using the method getState(int[] nodeIDs) or one of the new getDesiredState(int[] nodeIDs) or getActualState(int[] nodeIDs) depending on the purpose of the state query. A list of event router node IDs can be obtained using RhinoHousekeepingMBean.getEventRouterNodes(). For example, to wait until the SLEE is active on all nodes:

RhinoHousekeepingMBean rhinoHousekeeping =  RhinoManagement.getRhinoHousekeepingMBean(client);
SleeManagementMBean sleeManagement =  RhinoManagement.getSleeManagementMBean(client);
boolean active = false;
while (!active) {
    SleeState[] nodeStates = sleeManagement.getActualState(rhinoHousekeeping.getEventRouterNodes());
    active = Arrays.stream(nodeStates).filter(s -> s != SleeActualState.ACTIVE).count() == 0;
}

Rhino extension
Return state of specific nodes
public SleeState[] getState(int[] nodeIDs)
  throws NullPointerException, InvalidArgumentException,
    ManagementException;

Rhino provides an extension that adds an argument which lets you control which nodes to examine (by specifying node IDs).
Tip See also Detailed information for every node in the cluster.
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Rhino Version 3.1