private boolean isGroupAvailable(final WmiAgentState agentState, final Wpm wpm) {
LOG.debug(
"Checking availability of group {} via object {} of class {} in namespace {}",
wpm.getName(),
wpm.getKeyvalue(),
wpm.getWmiClass(),
wpm.getWmiNamespace());
WmiManager manager = null;
/*
* We provide a bogus comparison value and use an operator of "NOOP"
* to ensure that, regardless of results, we receive a result and perform
* no logic. We're only validating that the agent is reachable and gathering
* the result objects.
*/
try {
// Get and initialize the WmiManager
manager = agentState.getManager();
manager.setNamespace(wpm.getWmiNamespace());
manager.init();
final WmiParams params =
new WmiParams(
WmiParams.WMI_OPERATION_INSTANCEOF,
"not-applicable",
"NOOP",
wpm.getWmiClass(),
wpm.getKeyvalue());
final WmiResult result = manager.performOp(params);
final boolean isAvailable = (result.getResultCode() == WmiResult.RES_STATE_OK);
agentState.setGroupIsAvailable(wpm.getName(), isAvailable);
LOG.debug("Group {} is {}{}.", wpm.getName(), (isAvailable ? "" : "not "), "available");
} catch (final WmiException e) {
// Log a warning signifying that this group is unavailable.
LOG.warn("Error checking group ({}) availability.", wpm.getName(), e);
// Set the group as unavailable.
agentState.setGroupIsAvailable(wpm.getName(), false);
// And then continue on to check the next wpm entry.
return false;
} finally {
if (manager != null) {
try {
manager.close();
} catch (WmiException e) {
LOG.warn("An error occurred closing the WMI Manager", e);
}
}
}
return true;
}
/** {@inheritDoc} */
@Override
public void initialize(final CollectionAgent agent, final Map<String, Object> parameters) {
LOG.debug("initialize: Initializing WMI collection for agent: {}", agent);
final Integer scheduledNodeKey = Integer.valueOf(agent.getNodeId());
WmiAgentState nodeState = m_scheduledNodes.get(scheduledNodeKey);
if (nodeState != null) {
LOG.info(
"initialize: Not scheduling interface for WMI collection: {}", nodeState.getAddress());
final StringBuffer sb = new StringBuffer();
sb.append("initialize service: ");
sb.append(" for address: ");
sb.append(nodeState.getAddress());
sb.append(" already scheduled for collection on node: ");
sb.append(agent);
LOG.debug(sb.toString());
throw new IllegalStateException(sb.toString());
} else {
nodeState = new WmiAgentState(agent.getAddress(), parameters);
LOG.info("initialize: Scheduling interface for collection: {}", nodeState.getAddress());
m_scheduledNodes.put(scheduledNodeKey, nodeState);
}
}
/** {@inheritDoc} */
@Override
public CollectionSet collect(
final CollectionAgent agent, final EventProxy eproxy, final Map<String, Object> parameters) {
String collectionName =
ParameterMap.getKeyedString(
parameters,
"collection",
ParameterMap.getKeyedString(parameters, "wmi-collection", null));
// Find attributes to collect - check groups in configuration. For each,
// check scheduled nodes to see if that group should be collected
final WmiCollection collection =
WmiDataCollectionConfigFactory.getInstance().getWmiCollection(collectionName);
final WmiAgentState agentState = m_scheduledNodes.get(agent.getNodeId());
// Load the attribute group types.
loadAttributeGroupList(collection);
// Load the attribute types.
loadAttributeTypeList(collection);
// Create a new collection set.
final WmiCollectionSet collectionSet = new WmiCollectionSet();
collectionSet.setCollectionTimestamp(new Date());
final WmiSingleInstanceCollectionResource nodeResource =
new WmiSingleInstanceCollectionResource(agent);
// Iterate through the WMI collection groups.
for (final Wpm wpm : collection.getWpms().getWpm()) {
// A wpm consists of a list of attributes, identified by name
if (agentState.shouldCheckAvailability(wpm.getName(), wpm.getRecheckInterval())) {
if (!isGroupAvailable(agentState, wpm)) {
continue;
}
}
if (agentState.groupIsAvailable(wpm.getName())) {
WmiClient client = null;
// Collect the data
try {
// Tell the agent to connect
agentState.connect(wpm.getWmiNamespace());
// And retrieve the client object for working.
client = (WmiClient) agentState.getWmiClient();
// Retrieve the WbemObjectSet from the class defined on the group.
final OnmsWbemObjectSet wOS = client.performInstanceOf(wpm.getWmiClass());
// If we received a WbemObjectSet result, lets go through it and collect it.
if (wOS != null) {
// Go through each object (class instance) in the object set.
for (int i = 0; i < wOS.count(); i++) {
// Create a new collection resource.
WmiCollectionResource resource = null;
// Fetch our WBEM Object
final OnmsWbemObject obj = wOS.get(i);
// If this is multi-instance, fetch the instance name and store it.
if (wOS.count() > 1) {
// Fetch the value of the key value. e.g. Name.
final OnmsWbemProperty prop = obj.getWmiProperties().getByName(wpm.getKeyvalue());
final Object propVal = prop.getWmiValue();
String instance = null;
if (propVal instanceof String) {
instance = (String) propVal;
} else {
instance = propVal.toString();
}
resource =
new WmiMultiInstanceCollectionResource(agent, instance, wpm.getResourceType());
} else {
resource = nodeResource;
}
for (final Attrib attrib : wpm.getAttrib()) {
final OnmsWbemProperty prop =
obj.getWmiProperties().getByName(attrib.getWmiObject());
final WmiCollectionAttributeType attribType =
m_attribTypeList.get(attrib.getName());
resource.setAttributeValue(attribType, prop.getWmiValue().toString());
}
collectionSet.getCollectionResources().add(resource);
}
}
} catch (final WmiException e) {
LOG.info("unable to collect params for wpm '{}'", wpm.getName(), e);
} finally {
if (client != null) {
try {
client.disconnect();
} catch (final WmiException e) {
LOG.warn("An error occurred disconnecting while collecting from WMI.", e);
}
}
}
}
}
collectionSet.setStatus(ServiceCollector.COLLECTION_SUCCEEDED);
return collectionSet;
}