tree 3ac02ba4c1a41eca1c632395f7d3d259549f1042
parent e667239d5a57ee3599c6378839e7858a545ae275
author Tao Lin <lintao.lc@inspur.com> 1658925706 +0800
committer Patrick Williams <patrick@stwcx.xyz> 1662655699 +0000

Association not created when sensors from DBus

Save the path when create virtual sensors from DBus.
Main functions after saving:
* Set the threshold on the path corresponding to entity-manager
* Create an association

I found that the sensor created by reading virtual_sensor_config.json will create association.
However,the virtual sensor created from DBus has no association,
so I added this.
In this way, my web/redfish can display this virtual sensor.

```
root@NULL:~# busctl introspect  xyz.openbmc_project.VirtualSensor /xyz/openbmc_project/sensors/temperature/NVMe_MAX_Temp xyz.openbmc_project.Association.Definitions
NAME                                        TYPE      SIGNATURE RESULT/VALUE                                                                    FLAGS
.Associations                               property  a(sss)    1 "chassis" "all_sensors" "/xyz/openbmc_project/inventory/system/nvme/NVMe_MAX" emits-change writable
```

The BMC web will find my all_sensor according to the following steps:

```
root@NULL:~#  busctl call   xyz.openbmc_project.ObjectMapper   /xyz/openbmc_project/object_mapper  xyz.openbmc_project.ObjectMapper  GetSubTreePaths   sias  /xyz/openbmc_project/inventory   0 2 xyz.openbmc_project.Inventory.Item.Board xyz.openbmc_project.Inventory.Item.Chassis --verbose
MESSAGE "as" {
        ARRAY "s" {
                STRING "/xyz/openbmc_project/inventory/system/board/FP5280G2_Motherboard";
                STRING "/xyz/openbmc_project/inventory/system/chassis";
                STRING "/xyz/openbmc_project/inventory/system/nvme/NVMe_MAX";
        };
};

root@NULL:~# busctl call   xyz.openbmc_project.ObjectMapper /xyz/openbmc_project/inventory/system/nvme/NVMe_MAX/all_sensors  org.freedesktop.DBus.Properties Get ss xyz.openbmc_project.Association endpoints --verbose
MESSAGE "v" {
        VARIANT "as" {
                ARRAY "s" {
                        STRING "/xyz/openbmc_project/sensors/temperature/NVMe_MAX_Temp";
                };
        };
};
```

Signed-off-by: Tao Lin <lintao.lc@inspur.com>
Change-Id: I5ab8ce532dde9cff837f85d1e27a0a420942a8ce