$info

Returns information about the entity sets currently stored in 4D Server's cache as well as user sessions

Description

When you call this request for your project, you retrieve information in the following properties:

Property	Type	Description
cacheSize	Number	4D Server's cache size.
usedCache	Number	How much of 4D Server's cache has been used.
entitySetCount	Number	Number of entity selections.
entitySet	Collection	A collection in which each object contains information about each entity selection.
ProgressInfo	Collection	A collection containing information about progress indicator information.
sessionInfo	Collection	A collection in which each object contains information about each user session.

entitySet

For each entity selection currently stored in 4D Server's cache, the following information is returned:

Property	Type	Description
id	Text	A UUID that references the entity set.
dataClass	Text	Name of the dataclass.
selectionSize	Number	Number of entities in the entity selection.
sorted	Boolean	Returns true if the set was sorted (using $orderby) or false if it's not sorted.
refreshed	Date	When the entity set was created or the last time it was used.
expires	Date	When the entity set will expire (this date/time changes each time when the entity set is refreshed). The difference between refreshed and expires is the timeout for an entity set. This value is either two hours by default or what you defined using $timeout.

For information about how to create an entity selection, refer to $method=entityset. If you want to remove the entity selection from 4D Server's cache, use $method=release.

4D also creates its own entity selections for optimization purposes, so the ones you create with $method=entityset are not the only ones returned.

IMPORTANT If your project is in Controlled Admin Access Mode, you must first log into the project as a user in the Admin group.

sessionInfo

For each user session, the following information is returned in the sessionInfo collection:

Property	Type	Description
sessionID	Text	A UUID that references the session.
userName	Text	The name of the user who runs the session.
lifeTime	Number	The lifetime of a user session in seconds (3600 by default).
expiration	Date	The current expiration date and time of the user session.

Example

Retrieve information about the entity sets currently stored in 4D Server's cache as well as user sessions:

GET /rest/$info

Result:

{
cacheSize: 209715200,
usedCache: 3136000,
entitySetCount: 4,
entitySet: [
    {
        id: "1418741678864021B56F8C6D77F2FC06",
        tableName: "Company",
        selectionSize: 1,
        sorted: false,
        refreshed: "2011-11-18T10:30:30Z",
        expires: "2011-11-18T10:35:30Z"
    },
    {
        id: "CAD79E5BF339462E85DA613754C05CC0",
        tableName: "People",
        selectionSize: 49,
        sorted: true,
        refreshed: "2011-11-18T10:28:43Z",
        expires: "2011-11-18T10:38:43Z"
    },
    {
        id: "F4514C59D6B642099764C15D2BF51624",
        tableName: "People",
        selectionSize: 37,
        sorted: false,
        refreshed: "2011-11-18T10:24:24Z",
        expires: "2011-11-18T12:24:24Z"
    }
],
ProgressInfo: [
    {
        UserInfo: "flushProgressIndicator",
        sessions: 0,
        percent: 0
    },
    {
        UserInfo: "indexProgressIndicator",
        sessions: 0,
        percent: 0
    }
],
sessionInfo: [ 
    {
        sessionID: "6657ABBCEE7C3B4089C20D8995851E30",
        userID: "36713176D42DB045B01B8E650E8FA9C6",
        userName: "james",
        lifeTime: 3600,
        expiration: "2013-04-22T12:45:08Z"
    },
    {
        sessionID: "A85F253EDE90CA458940337BE2939F6F",
        userID: "00000000000000000000000000000000",
        userName: "default guest",
        lifeTime: 3600,
        expiration: "2013-04-23T10:30:25Z"
}
]
}

The progress indicator information listed after the entity selections is used internally by 4D.