com.vaadin.collaborationengine.

java.lang.Object
- com.vaadin.collaborationengine.ComponentConnectionContext

All Implemented Interfaces:

ConnectionContext
```
public class ComponentConnectionContext
extends Object
implements ConnectionContext
```
A connection context based on the attach state of a set of component instances. The context is considered active whenever at least one tracked component is attached. All attached components must belong to the same UI instance, and this UI instance is used to dispatch actions using UI.access(Command).

Since:

1.0

Author:

Vaadin Ltd

Constructor Summary

Constructors
Constructor	Description
`ComponentConnectionContext()`	Creates an empty component connection context.
`ComponentConnectionContext(Component component)`	Creates a new component connection context which is initially using a single component.

Method Summary

All Methods
Modifier and Type	Method	Description
`void`	`addComponent(Component component)`	Adds a component instance to track for this context.
`Registration`	`init(ActivationHandler activationHandler, Executor backgroundRunner)`	Initializes the connection context with a `ActivationHandler` and an `Executor`.
`void`	`removeComponent(Component component)`	Stops tracking a component for this context.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ComponentConnectionContext
```
public ComponentConnectionContext()
```
    Creates an empty component connection context.
    
    Since:
    
    1.0
  - ComponentConnectionContext
```
public ComponentConnectionContext(Component component)
```
    Creates a new component connection context which is initially using a single component.
    
    Parameters:
    
    component - the component to use, not null
    
    Since:
    
    1.0
- Method Detail
  - addComponent
```
public void addComponent(Component component)
```
    Adds a component instance to track for this context. Calling this method again with a component that is already tracked has no effect.
    
    Parameters:
    
    component - the component to track, not null
    
    Since:
    
    1.0
    
    See Also:
    
    removeComponent(Component)
  - removeComponent
```
public void removeComponent(Component component)
```
    Stops tracking a component for this context. Calling this method for a component that isn't tracked has no effect.
    
    Parameters:
    
    component - the component to stop tracking, not null
    
    Since:
    
    1.0
    
    See Also:
    
    addComponent(Component)
  - init
```
public Registration init(ActivationHandler activationHandler,
                         Executor backgroundRunner)
```
    Description copied from interface: ConnectionContext
    
    Initializes the connection context with a ActivationHandler and an Executor.
    The method Consumer.accept(Object) from the provided ActivationHandler should be called with an ActionDispatcher when this ConnectionContext is activated. When this ConnectionContext is deactivated, it should call Consumer.accept(Object) with a null parameter.
    The ActionDispatcher should ensure synchronization within the context of this ConnectionContext.
    
    Specified by:
    
    init in interface ConnectionContext
    
    Parameters:
    
    activationHandler - the handler for activation changes
    
    backgroundRunner - executor that should be used by the handler to execute background tasks. Not null
    
    Returns:
    
    the registration for any logic that needs to be cleaned up if the connection is closed permanently, or null if there is nothing to clean up

com.vaadin.collaborationengine.

Class ComponentConnectionContext

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ComponentConnectionContext

ComponentConnectionContext

Method Detail

addComponent

removeComponent

init