MemberInvocable

```
public interface MemberInvocable
```
The MemberInvocable interface allows applications to define custom code to be executed on the members of a space. Determination of the members who should execute the MemberInvocable interface is made by the calling application as opposed to the Invocable interface where execution of the interface is based upon where data resides in the space.
Execution of the MemberInvocable interface is triggered by an application which can be running on the same member or a different member of the space. In ActiveSpaces, this is referred to as remote invocation. The remote invocation code is colocated with the data which increases performance.
With the MemberInvocable interface, an application can specify which members should execute the interface as follows:
```
     - A certain space member
     - All space members
     - Only space seeders
     - Only remote space members
 
```
The code implementing the MemberInvocable interface needs to be included in the CLASSPATH for each member of the space.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`Tuple`	`invoke(Space space, Tuple context)` The `invoke` method is executed by certain members of a space or all members of a space.

- Method Detail
  - invoke
```
Tuple invoke(Space space,
             Tuple context)
```
    The invoke method is executed by certain members of a space or all members of a space. The execution of the invoke method is initiated by the client application calling one of the following methods of the Space object:
```
     Space.invokeMember(com.tibco.as.space.Member, java.lang.String, com.tibco.as.space.InvokeOptions)
     Space.invokeMembers(java.util.Collection<com.tibco.as.space.Member>, java.lang.String, com.tibco.as.space.InvokeOptions)
     Space.invokeSeeders(java.lang.String, com.tibco.as.space.InvokeOptions)
     Space.invokeRemoteMembers(java.lang.String, com.tibco.as.space.InvokeOptions)
```
    The application can specify which members of a space should execute the invoke method as follows:
    - invokeMember - The specified space member executes the invoke method
    - invokeMembers - All space members execute the invoke method
    - invokeSeeders - Only seeders of the space execute the invoke method
    - invokeRemoteMembers - Only remote members of the space execute the invoke method
    The invoke method is guaranteed to be called at least once, but may be called multiple times. Therefore, the invoke method should be idempotent.
    Parameters:
    
    space - Space object that the invocation request is coming from
    
    context - Used to pass information from the calling application
    
    Returns:
    
    Tuple Contains the result of the invocation

Interface MemberInvocable

Method Summary

Method Detail

invoke