/** Main dispatch method called from the LatherBoss. */
public LatherValue dispatch(LatherContext ctx, String method, LatherValue arg)
throws LatherRemoteException {
Integer agentId = null;
if (!haService.alertTriggersHaveInitialized()) {
if (log.isDebugEnabled()) {
log.debug("Not ready - received request for " + method + " from " + ctx.getCallerIP());
}
throw new LatherRemoteException("Server still initializing");
}
if (log.isDebugEnabled()) {
log.debug("Request for " + method + "() from " + ctx.getCallerIP());
}
if (!HAUtil.isMasterNode()) {
log.warn("Non-primary server received communication from an agent. Request will be denied.");
throw new LatherRemoteException(
"This server is not the primary node in the HA configuration. Agent request denied.");
}
if (secureCommands.contains(method)) {
if (!(arg instanceof SecureAgentLatherValue)) {
log.warn(
"Authenticated call made from "
+ ctx.getCallerIP()
+ " which did not subclass the correct authentication class");
throw new LatherRemoteException("Unauthorized agent denied");
}
String agentToken = ((SecureAgentLatherValue) arg).getAgentToken();
validateAgent(ctx, agentToken);
synchronized (tokensToTime) {
tokensToTime.put(agentToken, System.currentTimeMillis());
}
try {
Agent a = agentManager.getAgent(agentToken);
agentId = a.getId();
} catch (AgentNotFoundException e) {
log.debug(e, e);
}
}
AgentConnection conn = null;
long start = 0;
try {
conn = agentManager.getAgentConnection(method, ctx.getCallerIP(), agentId);
start = now();
return runCommand(ctx, method, arg);
} catch (LatherRemoteException e) {
concurrentStatsCollector.addStat(1, LATHER_REMOTE_EXCEPTION);
throw e;
} finally {
if (conn != null) {
agentManager.disconnectAgent(conn);
}
long duration = now() - start;
concurrentStatsCollector.addStat(duration, LATHER_RUN_COMMAND_TIME);
}
}
/**
* Update an Agent's setup information. When an agent's 'setup' is called after it has already
* been setup, the connection information (i.e. address to contact, port, etc.) are updated but
* the same agent token is kept.
*/
private UpdateAgent_result cmdUpdateAgent(LatherContext ctx, UpdateAgent_args args)
throws LatherRemoteException {
Agent agent;
String errRes;
try {
checkUserCanManageAgent(ctx, args.getUser(), args.getPword(), "update");
} catch (PermissionException exc) {
return new UpdateAgent_result("Permission denied");
}
validateAgent(ctx, args.getAgentToken(), false);
String agentIP = args.getAgentIP();
int port = args.getAgentPort();
boolean isNewTransportAgent = args.isNewTransportAgent();
boolean unidirectional = args.isUnidirectional();
boolean acceptValidation = args.isAcceptCertificates();
try {
agent = agentManager.getAgent(args.getAgentToken());
if ((errRes =
testAgentConn(
agentIP,
port,
agent.getAuthToken(),
isNewTransportAgent,
unidirectional,
acceptValidation))
!= null) {
return new UpdateAgent_result(errRes);
}
log.info(
"Updating agent at "
+ agentIP
+ ":"
+ port
+ ""
+ "; new transport="
+ isNewTransportAgent
+ "; unidirectional="
+ unidirectional);
if (isNewTransportAgent) {
agentManager.updateNewTransportAgent(args.getAgentToken(), agentIP, port, unidirectional);
} else {
agentManager.updateLegacyAgent(args.getAgentToken(), agentIP, port);
}
} catch (AgentNotFoundException exc) {
return new UpdateAgent_result("Agent not found for update");
}
return new UpdateAgent_result();
}
/**
* Disable measurements and unschedule from the agent in bulk with the agent cache info because
* the resources have been de-referenced from the agent
*
* @param agentCache {@link Map} of {@link Integer} of agentIds to {@link List} of {@link
* AppdefEntityID}s
*/
private void unscheduleMeasurementsForAsyncDelete(Map<Integer, List<AppdefEntityID>> agentCache) {
if (agentCache == null) {
return;
}
try {
AuthzSubject subject = authzSubjectManager.findSubjectById(AuthzConstants.overlordId);
for (Integer agentId : agentCache.keySet()) {
Agent agent = agentManager.getAgent(agentId);
List<AppdefEntityID> resources = agentCache.get(agentId);
measurementManager.disableMeasurementsForDeletion(
subject,
agent,
(AppdefEntityID[]) resources.toArray(new AppdefEntityID[resources.size()]));
}
} catch (Exception e) {
log.error("Error unscheduling measurements during async delete", e);
}
}
/**
* Registers the agent according to the provided RegisterAgent_args under a new transaction
*
* @param args - the RegisterAgent_args
* @param ids - if the is an existing agent, this collection will contain the ids of the platforms
* monitored by this agent after this method execution.
* @return - RegisterAgent_result
*/
@Transactional(propagation = Propagation.REQUIRES_NEW)
private RegisterAgent_result registerAgent(RegisterAgent_args args, Collection<Integer> ids) {
String agentIP = args.getAgentIP();
int port = args.getAgentPort();
String version = args.getVersion();
boolean isNewTransportAgent = args.isNewTransportAgent();
boolean unidirectional = args.isUnidirectional();
boolean acceptValidation = args.isAcceptCertificates();
String errRes =
testAgentConn(
agentIP,
port,
args.getAuthToken(),
isNewTransportAgent,
unidirectional,
acceptValidation);
if (errRes != null) {
return new RegisterAgent_result(errRes);
}
boolean isOldAgentToken = true;
String agentToken = args.getAgentToken();
if (agentToken == null) {
// Generate a unique agent token
agentToken = SecurityUtil.generateRandomToken();
while (!agentManager.isAgentTokenUnique(agentToken)) {
agentToken = SecurityUtil.generateRandomToken();
}
isOldAgentToken = false;
}
// Check the to see if the agent already exists.
// Lookup the agent by agent token (if it exists). Otherwise, use the
// agent IP and port.
try {
Agent origAgent;
if (isOldAgentToken) {
origAgent = agentManager.getAgent(agentToken);
} else {
origAgent = agentManager.getAgent(agentIP, port);
}
try {
ids.addAll(
platformManager.getPlatformPksByAgentToken(
authzSubjectManager.getOverlordPojo(), origAgent.getAgentToken()));
} catch (Exception e) {
// No platforms found, no a big deal
}
log.info(
"Found preexisting agent during agent registration. "
+ "Updating agent information for "
+ agentIP
+ ":"
+ port
+ "; new transport="
+ isNewTransportAgent
+ "; unidirectional="
+ unidirectional);
if (isOldAgentToken) {
if (isNewTransportAgent) {
agentManager.updateNewTransportAgent(
agentToken, agentIP, port, args.getAuthToken(), version, unidirectional);
} else {
agentManager.updateLegacyAgent(agentToken, agentIP, port, args.getAuthToken(), version);
}
} else {
if (isNewTransportAgent) {
agentManager.updateNewTransportAgent(
agentIP, port, args.getAuthToken(), agentToken, version, unidirectional);
} else {
agentManager.updateLegacyAgent(agentIP, port, args.getAuthToken(), agentToken, version);
}
}
} catch (AgentNotFoundException exc) {
log.info(
"Registering agent at "
+ agentIP
+ ":"
+ port
+ ""
+ "; new transport="
+ isNewTransportAgent
+ "; unidirectional="
+ unidirectional);
try {
if (isNewTransportAgent) {
agentManager.createNewTransportAgent(
agentIP, new Integer(port), args.getAuthToken(), agentToken, version, unidirectional);
} else {
agentManager.createLegacyAgent(
agentIP, new Integer(port), args.getAuthToken(), agentToken, version);
}
} catch (AgentCreateException oexc) {
log.error("Error creating agent", oexc);
return new RegisterAgent_result("Error creating agent: " + oexc.getMessage());
} catch (SystemException oexc) {
log.error("Error creating agent", oexc);
return new RegisterAgent_result("Error creating agent: " + "Internal system error");
}
} catch (SystemException exc) {
log.error("Error updating agent", exc);
return new RegisterAgent_result("Error updating agent: " + "Internal system error");
}
RegisterAgent_result result = new RegisterAgent_result("token:" + agentToken);
return result;
}