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Jira Legacy server System Jira columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 4733707d-2057-3a0f-ae5e-4fd8aff50176 key CPS-1616 Jira Legacy server System Jira columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 4733707d-2057-3a0f-ae5e-4fd8aff50176 key CPS-1615 Jira Legacy server System Jira columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 4733707d-2057-3a0f-ae5e-4fd8aff50176 key CPS-1812 Jira Legacy server System Jira columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 4733707d-2057-3a0f-ae5e-4fd8aff50176 key CPS-1865 - Impl. Proposal for Merging of Subscriptions ( Positive Scenarios )
Issues & Decisions
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New Subscription changes forecasted for 25Q2.
Deliver current event based subscription discuss with wider stakeholders on
Create DME subscription interfaces as a new subscription epic -[CPS-2233] CM Subscription with DME interface - ONAP Jira
Kolawole Adebisi-Adeolokun to create backlog Jira
Requirements
Functional
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Interface
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Requirement
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Additional Information
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Requirements
Functional
Interface | Requirement | Additional Information | Signoff | |||||||||||||
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| 1 | CPS-E-08e | NCMP will forward 'CM Notifications Subscription' LCM Create events to the appropriate DMI Plugins responsible for the CM Handles (ids) defined in the LCM Events. The message sent to DMI should include the private properties for each CM-Handle |
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| 2 | CPS-E-08e | NCMP will forward 'CM Notifications Subscription' LCM Delete events to the appropriate DMI Plugins responsible for the CM Handles | (ids) is defined in the LCM Events. A delete should only be forwarded if there is no other subscription for cmhandle datastore path. |
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| 23 | CPS-E-08e | NCMP will forward 'CM Notifications Subscription' LCM Delete events to the appropriate DMI Plugins responsible for the CM Handles is defined in the LCM Events. The message sent to DMI should include the private properties for each CM-Handle. A delete should only be forwarded if there is no other subscription for cmhandle datastore path. |
| 3 | CPS-E-08e | NCMP responds responds using Kafka message(s) with the result of the LCM operation These messages will use agreed status fields:
| Action: Define error details later
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| 4 | CPS-E-08e | All events should use Cloud Events format | https://cloudevents.io/ | |||||||||||||
| 5 | CPS-E-08e | Messages should be processed in the order they are created (received) | It will depend on DMIs responding within 30s. Subscription-id should be used as Kafka 'key' to ensure this. | |||||||||||||
| 6 | CPS-E-08.e | NCMP is to merge CM Notification Subscriptions create request and forward those to DMI plugin. (Interface to be added). |
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| 7 | CPS-E-08.e | Last lights out: upon subscription Delete request only when there is no more subscription for a cm-handle & xpath & datastore combination a subscription-delete request will be sent to the relevant DMI(s). | ||||||||||||||
| 8 | CPS-E-08.e | A single client subscription request should result into a maximum of one request per DMI. Of course there can be several messages if more than 1 DMI is involved. | ||||||||||||||
| 9 | CPS-E-08.e | Amalgamate response should include rejected/accepted/pending DMI responses received within 30 seconds. A client shall be notified of available DMI subscription information after 30 seconds. Subsequent DMI subscription updates shall be notified to clients as they become available. |
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| 10 | CPS-NCMP-I-01 | CM Handle deletion should NOT update subscription details. | Do NOT delete dmi-subscription entry until owning subscription is deleted, see issue #4 below | |||||||||||||
| 11 | CPS-E-08.e |
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Assumption | Notes | |
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| 1 | Targets is a collection of xpaths | can be implemented as a json array of strings |
| 2 | for the DMI plugin cm-handle-id, datastore and xpath are the key to a unique subscription | the client-id and subscription name are not relevant for the DMI (should not be included in the request) as this would break the concept of merging! |
Issues & Decisions
| Issue | Notes | Decision | |
|---|---|---|---|
| 1 | Is it intended that CM Notification subscription request cover (all) descendants of the given xpath too?! | e.g.. if a child is removed and there is a subscription for the parent node, will a notification be send (grandchild, child leaf updates etc.) I hope NOT! Consider:
| Descendent don't need to be taken into account |
| 2 | Could xpath point to an element that does not exist (yet) | if not how, how can I client be informed about a create event? | xpath can point to an element that does not exist (yet) CPS/NCMP Does not need to check Xpath |
| 3 | Should NCMP support re-homing, moving of a CM Handle from one DMI to another? | assume only trough delete & create | only trough delete & create |
| 4 | CM Handle Delete: Should DMI or Clients be sent a subscription update | do NOT delete dmi-subscription entry until owning subscription is deleted Note. LCM is already broadcast (today) | No, subscription update
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| 5 | Validation of xpath | options order of implement and also performance cost!
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| 6 | can DMI plugin 'reject' a subscription create (for a given cm-handle-xpath combination) | As NCMP might not validate as per issue#5 the DMI=plugin or component further down might have to reject an invalid xpath... | yes currently DMI can use response to say which cm handles are not accepted i.e. rejected' (but not 'pending') |
| 7 | implementation question: should 'rejected' DMI-subscriptions be stored | not needed as whole subscription should be rejected | not needed as whole subscription should be rejected |
| 8 | Dimensioning of DB depends on #cm handles, #subscriptions and #xpaths per subscription, this could be too big for fast processing of updates! | Need to agree maximum and possibly realistic average/total number of entries based on the characteristics above | - kieran mccarthy- Dimensioning has been agreed. See Characteristics |
| 9 | Maximum (error) message size | theoretically all cm handles and all xpaths combinations could be rejected or pending leading to a very large error message! | ?? what was agreed ? Kolawole Adebisi-Adeolokun to update what was agree |
| 10 | can each CM-Handle have different set of xpath(s) per subscription | the current 'basic' solution only supports a common set of datastore/xpaths (filter) | Yes, schema modification allows this |
| 11 | can the same cm handle/xpath have different subscriptions with different datastores, does that affect the cm data notifications send (which datastore applies) |
| Although this wiki-page will not be updated where cmHandle+xpath is mentioned as unique entry etc. this should now include a third field: datastore as well. |
| 12 | Will migration from 'basic' be supported | Preferred to ask customers to create new subscriptions | No, basic sub. will not be delivered as a separate feature |
| 13 | list v list instances filtering | /p/c1 | List entries are unique. |
| 14 | confirm subscription id (currently subscription name + client id) | previously was clientid and subcrioptionid and we were relying on concatenation of both to be unique | Now only the event would contain subcrioptionid |
| 15 | what subscription details should be send when there is a change (in the union) |
| Just Delta |
| 16 | one DMI rejects whole (see decision #6) subscription (affected cmhandles) but other DMI accepts the same subscription, is this possible how to handle | Yes, this has been analysed | |
| 17 | What all datastores are supported ? | ncmp-datastore:passthrough-running or ncmp-datastore:passthrough-operational ?? or both? | - kieran mccarthy Both will be supported |
| 18 | When NCMP sends subscription request to DMI and then DMI responds back to NCMP , do we need to have a correlationId to track/map the request and response? | Value: subscriptionID:DMIPluginName (Check if subscriptionId or DMIPlugin name doesn't contain a colon: ) - The seperator is to be chosen by the development team, will try with colon first. | subscriptionId to be used. |
| 19 | Which status codes to be used when the DMI Plugins respond back to NCMP ? We already have codes defined in NCMP. Do we reuse the same status codes when DMI Plugin responds back to NCMP with the subscription status ? | Yes, reuse. | kieran mccarthy - Reuse the same codes defined in NCMP. |
| 20 | Impl. Proposal for Merging of Subscription | Schemas Agreed for the below events ( Source to Destination ) for the positive scenarios. for the below events ( Source to Destination ) for the positive scenarios.
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| 21 | Create DME subscription interfaces Schema Change | Schema Change, Events driven change now HTTP Rest. Study status is at 2/3 of review. CPS need to study new changes to subscription once study is approved. | New Subscription changes forecasted for 25Q2. Create DME subscription interfaces as a new subscription epic -[CPS-2233] CM Subscription with DME interface - ONAP Jira
Kolawole Adebisi-Adeolokun to create backlog Jira |
Solution Proposal
State handling for initial (basic)subscription create/delete use cases (not using concept of 'merging')
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