| Package | Description | 
|---|---|
| org.apache.reef.driver.context | |
| org.apache.reef.evaluator.context | |
| org.apache.reef.runtime.common.evaluator.context.defaults | 
 Default implementations for the optional context interfaces. 
 | 
| Class and Description | 
|---|
| ContextMessageHandler
 Implement this interface to receive messages from the driver in a context. 
 | 
| ContextMessageSource
 Message source for control flow messages from a context to the Driver. 
 | 
| Class and Description | 
|---|
| ContextMessage
 Evaluator-side representation of a message sent from an Evaluator to a Driver. 
 | 
| Class and Description | 
|---|
| ContextMessage
 Evaluator-side representation of a message sent from an Evaluator to a Driver. 
 | 
| ContextMessageHandler
 Implement this interface to receive messages from the driver in a context. 
 | 
| ContextMessageSource
 Message source for control flow messages from a context to the Driver. 
 | 
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