/**
* This method needs a valid root OID to return a VariableBinding list with the sub entities.
*
* @param rootID - The root OID
* @return - a list containing VariableBinding
*/
public List<VariableBinding> getSubtree(OID rootID) throws TreeEventException {
TreeUtils treeUtils = new TreeUtils(snmp, new DefaultPDUFactory());
treeUtils.setMaxRepetitions(Integer.MAX_VALUE);
List<TreeEvent> events = treeUtils.getSubtree(authentication.getTarget(), rootID);
// Get snmpwalk result.
List<VariableBinding> varBindings = new ArrayList<VariableBinding>();
for (TreeEvent event : events) {
if (event != null) {
if (event.isError())
throw new TreeEventException("oid [" + rootID + "] " + event.getErrorMessage());
Collections.addAll(varBindings, event.getVariableBindings());
}
}
return varBindings;
}
@Override
public boolean next(TreeEvent event) {
if (!finished) {
SnmpUriResponse response = createResponse(event);
finished |= callback.onResponse(response, url, event.getUserObject());
}
return !finished;
}
@Override
public void finished(TreeEvent event) {
if (!finished) {
SnmpUriResponse response = createResponse(event);
if (response.getResponseType() == SnmpUriResponse.Type.NEXT) {
response.setResponseType(SnmpUriResponse.Type.FINAL);
}
callback.onResponse(response, url, event.getUserObject());
finished = true;
}
}
private SnmpUriResponse createResponse(TreeEvent event) {
SnmpUriResponse response = new SnmpUriResponse(SnmpUriResponse.Type.TIMEOUT);
if (event.getStatus() == TreeEvent.STATUS_OK) {
VariableBinding[] vbs = event.getVariableBindings();
int errorStatus = event.getStatus();
response = new SnmpUriResponse(Collections.singletonList(vbs), errorStatus);
if (errorStatus == PDU.noError) {
response.setResponseType(SnmpUriResponse.Type.NEXT);
}
} else if (event.getStatus() == TreeEvent.STATUS_EXCEPTION) {
response =
new SnmpUriResponse(SnmpUriResponse.Type.IO_ERROR, event.getException().getMessage());
} else if (event.getStatus() == TreeEvent.STATUS_REPORT) {
response =
new SnmpUriResponse(
SnmpUriResponse.Type.SECURITY_ERROR,
(event.getReportPDU().size() > 0
? event.getReportPDU().get(0).toString()
: "<empty report PDU>"));
} else if (event.getStatus() == TreeEvent.STATUS_WRONG_ORDER) {
response = new SnmpUriResponse(SnmpUriResponse.Type.LEXICOGRAPHIC_ORDER_ERROR);
}
return response;
}