// route_item is the entry point for all registered items.
//
//export route_item
func route_item(request *C.AGENT_REQUEST, result *C.AGENT_RESULT) C.int {
// marshall a C.AGENT_RESULT to g2z.AgentRequest
req := &AgentRequest{
Key: C.GoString(request.key),
Params: make([]string, request.nparam),
}
for i := 0; i < int(request.nparam); i++ {
req.Params[i] = C.GoString(C.g2z_get_rparam(request, C.int(i)))
}
// get the item handler for the requested key
item, ok := itemHandlers[req.Key]
if !ok {
// this should never happen
LogCriticalf("Item appears to be registered but has no go handler: %s", req.Key)
return C.SYSINFO_RET_FAIL
}
// call handler function
switch item.Callback.(type) {
case StringItemHandlerFunc:
LogDebugf("Calling StringItemHandlerFunc for key: %s", req.Key)
if v, err := item.Callback.(StringItemHandlerFunc)(req); err != nil {
setMessageResult(result, err.Error())
return C.SYSINFO_RET_FAIL
} else {
result._type = C.AR_STRING
result.str = C.CString(v) // freed by Zabbix
}
case Uint64ItemHandlerFunc:
LogDebugf("Calling Uint64ItemHandlerFunc for key: %s", req.Key)
if v, err := item.Callback.(Uint64ItemHandlerFunc)(req); err != nil {
setMessageResult(result, err.Error())
return C.SYSINFO_RET_FAIL
} else {
result._type = C.AR_UINT64
result.ui64 = C.uint64_t(v)
}
case DoubleItemHandlerFunc:
LogDebugf("Calling DoubleItemHandlerFunc for key: %s", req.Key)
if v, err := item.Callback.(DoubleItemHandlerFunc)(req); err != nil {
setMessageResult(result, err.Error())
return C.SYSINFO_RET_FAIL
} else {
result._type = C.AR_DOUBLE
result.dbl = C.double(v)
}
case DiscoveryItemHandlerFunc:
LogDebugf("Calling DiscoveryItemHandlerFunc for key: %s", req.Key)
if v, err := item.Callback.(DiscoveryItemHandlerFunc)(req); err != nil {
setMessageResult(result, err.Error())
return C.SYSINFO_RET_FAIL
} else {
result._type = C.AR_STRING
result.str = C.CString(v.Json()) // freed by Zabbix
}
}
return C.SYSINFO_RET_OK
}
// setMessageResult adds an error message to an agent result struct
func setMessageResult(result *C.AGENT_RESULT, format string, a ...interface{}) {
result._type = C.AR_MESSAGE
result.msg = C.CString(fmt.Sprintf(format, a...)) // freed by Zabbix
}