groovyx.gpars.dataflow
Interface SelectableChannel<T>

All Known Subinterfaces:

DataflowChannel<T>, DataflowReadChannel<T>, Promise<T>

All Known Implementing Classes:

DataflowComplexExpression, DataflowExpression, DataflowExpression.TransformMany, DataflowExpression.TransformOne, DataflowGetPropertyExpression, DataflowInvocationExpression, DataflowQueue, DataflowStreamReadAdapter, DataflowVariable, DataflowVariable.RemoteDataflowVariable, LazyDataflowVariable, RemoteDataflowExpression, SyncDataflowQueue, SyncDataflowStreamReadAdapter, SyncDataflowVariable

public interface SelectableChannel<T>

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Method Summary

DataflowExpression<T>	poll() Retrieves the value at the head of the buffer.
<V> void	wheneverBound(groovy.lang.Closure<V> closure) Send all pieces of data bound in the future to the provided stream when it becomes available
void	wheneverBound(MessageStream stream) Send all pieces of data bound in the future to the provided stream when it becomes available.

Method Detail

wheneverBound

<V> void wheneverBound(groovy.lang.Closure<V> closure)

Send all pieces of data bound in the future to the provided stream when it becomes available. *

Parameters:

closure - closure to execute when data becomes available. The closure should take at most one argument.

wheneverBound

void wheneverBound(MessageStream stream)

Send all pieces of data bound in the future to the provided stream when it becomes available.

Parameters:

stream - stream where to send result

poll

DataflowExpression<T> poll()
                           throws java.lang.InterruptedException

Retrieves the value at the head of the buffer. Returns null, if no value is available.

Returns:

The value bound to the DFV at the head of the stream or null

Throws:

java.lang.InterruptedException - If the current thread is interrupted