Firebase. Database. OnDisconnect
The OnDisconnect class is used to manage operations that will be Run on the server when this client disconnects.
Summary
The OnDisconnect class is used to manage operations that will be Run on the server when this client disconnects. It can be used to add or Remove data based on a client's connection status. It is very useful in applications looking for 'presence' functionality.
Instances of this class are obtained by calling onDisconnect
Public functions |
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Cancel()
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Task
Cancel any disconnect operations that are queued up at this location
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RemoveValue()
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Task
Remove the value at this location when the client disconnects
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SetValue(object value)
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Task
Ensure the data at this location is set to the specified value when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
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SetValue(object value, string priority)
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Task
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
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SetValue(object value, double priority)
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Task
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
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UpdateChildren(IDictionary< string, object > update)
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Task
Ensure the data has the specified child values updated when the client is disconnected
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Public functions
Cancel
Task Cancel()
Cancel any disconnect operations that are queued up at this location
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Returns |
The Task{TResult} for this operation.
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RemoveValue
Task RemoveValue()
Remove the value at this location when the client disconnects
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Returns |
The Task{TResult} for this operation.
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SetValue
Task SetValue( object value )
Ensure the data at this location is set to the specified value when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
Ensure the data at this location is set to the specified value when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
This method is especially useful for implementing "presence" systems, where a value should be changed or cleared when a user disconnects so that they appear "offline" to other users.
Details | |||
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Parameters |
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Returns |
The Task{TResult} for this operation.
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SetValue
Task SetValue( object value, string priority )
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
This method is especially useful for implementing "presence" systems, where a value should be changed or cleared when a user disconnects so that they appear "offline" to other users.
Details | |||||
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Parameters |
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Returns |
The Task{TResult} for this operation.
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SetValue
Task SetValue( object value, double priority )
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
Ensure the data at this location is set to the specified value and priority when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).
This method is especially useful for implementing "presence" systems, where a value should be changed or cleared when a user disconnects so that they appear "offline" to other users.
Details | |||||
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Parameters |
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Returns |
The Task{TResult} for this operation.
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UpdateChildren
Task UpdateChildren( IDictionary< string, object > update )
Ensure the data has the specified child values updated when the client is disconnected
Details | |||
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Parameters |
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Returns |
The Task{TResult} for this operation.
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