示例#1
0
// 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
}
示例#2
0
// 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
}