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Trivore Identity Service (TIS) can be used to store small amounts of application specific data. There are a number of different types of data persistence methods for different kinds of data. This chapter covers the basics of those methods and helps making the decision on which method to use in which situation. This page also describes the logical locations of data for both user accounts and applications/services. The rationale combining these two seemingly different entities is simple: both may own similar objects, and both may share same objects. This sharing capability is of course controlled and safe when done right.
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The graph above has four main entities, two user accounts and two applications/services (all darker blue). We use here both terms “application” and “service” interchangeably as they are the same thing in this context, yet many people only use the other term. We cover these more carefully later.
The fifth blue box represents the traditional user account group. These are shown here mostly due to them being able to carry access control and thus give access for their members.
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Access control is defined often in lists, one for read+-write and one for read-only. If an entity such as user or service Management API Client is in a list, it will get appropriate access. Term access control list (ACL) and access control entry (ACE) are often used. ACE is one item in ACL. Access control is used purely for security purposes, not per permission management.
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Please note the access control is totally different internal control layer from user access token and management API client, which cover broader access capability from outside of service. For effective access state all three must be considered.
Trivore Identity Service (TIS) can be used to store small amounts of application specific data. There are a number of different types of data persistence points for different kinds of data. This chapter covers the basics of those points and gives recommendations on which point to use in which situation.
User related data persistence
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The user tokens are the most advanced user related data structure with access management support. User tokens are key-value pairs, but many types of data can be stored in them.
User
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tags
User tags are pieces of strings, which are attached to the user account. The user tags are indexed and users can be queried by tags. User tags can also be thought as lightweight groups, where a tag is the name of the group. TIS does not internally use user tags for anything and makes no interpretations on the meaning of the tags. It is up to the external application to
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User tokens are access controlled key-value pairs attached to user accounts. User tokens have a list of entities, which are allowed to read the token and another list with entities, which are allowed to modify the token.
User tokens can be queried by key.
Others
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Generic data persistence
Data storages and application tokens can be used for more generic data persistence, which might not have anything to do with users. They can be used to store any application specific data.
The limitations of these storage methods are explained in the more detailed documents.
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Data type | Scope | REST API access | Accessible with | Max amount | Considerations |
|---|---|---|---|---|---|
User account custom fields | User account |
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| Limited by combined user document size limit. | All fields are managed in bulk via REST. Take care when sharing between services. |
User tokens | User account | User tokens have their own REST API endpoint:
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| Multiple may exist. For max size, see table below. | Good for smaller and low volume, controlled data sharing. |
Application private tokens | External service, each Management API client has their own set of private tokens. | Application private tokens have their own REST API endpoint:
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| Multiple tokens may exist. For max size, see table below. | Having too many tokens may decrease application performance. Optimal single token size is usually around 1 kilobyte. Design application carefully. |
Data storage | Anything (Scope varies between data storages) | REST API endpoint:
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| Unlimited amount of tokens may exist. For max size for one, see table below. | Very performant. Each data storage may have different access controls. |
User account (including identifying data and tags) | User account |
OpenID UserInfo endpoint:
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| For max size for one user account, see table below. | Holds some of the auxiliary user account data. Also holds all user identity data. |
Table The table below shows important developer information on maximum data sizes. Total size includes keys, names, and some meta data, not only the main payload.
Data type(s) | Maximum combined total size | Allowance |
|---|---|---|
User account (including tags, custom fields, identity data) | 16 MB per user account | Unlimited amount number of user accounts |
User tokens | 16 MB per token | Multiple tokens up to max size for each user accountUnlimited number of tokens |
Application private tokens | 16 MB (current limit for all tokens of one service)Multiple tokens up to max size for each serviceper token | Unlimited number of tokens |
Data storage | 16 MB per storage Multiple for each user account and for each servicewith multiple key-data pairs | Unlimited number of data storages |