Examples of groovyx.gpars.dataflow.Select

groovyx.gpars.dataflow.Select

A Select allows the user to select a value from multiple channels, which have a value available for read at the moment. It can either pick a channel randomly, when using the plain select method, or with precedence towards channels with lower position indexes, when the prioritySelect method is used. If a value is not available immediately in any of the channels, Select will wait for the first value to arrive in any of the channels.

Both 'select' and 'prioritySelect' methods come in two flavours - blocking, which wait till a value is available in a channel, and messaging, which send out a message to the specified message handler, as soon as a message is available. Optionally, all methods allow the user to specify a boolean mask, assigning each select 's input channel a flag indicating, whether it should be included in the select operation. This is useful when handling state to selectively block some inputs in some states.

@author Vaclav PechDate: 30th Sep 2010

     * obtain values from the supplied dataflow variables or streams as they become available.
     *
     * @param channels Dataflow variables or streams to wait for values on
     */
    public final Select select(final SelectableChannel... channels) {
        return new Select(this, channels);
    }

     * obtain values from the supplied dataflow variables or streams as they become available.
     *
     * @param channels Dataflow variables or streams to wait for values on
     */
    public final Select select(final List<SelectableChannel> channels) {
        return new Select(this, channels);
    }

            checkMaxForks(channels);
            this.actor = new ForkingDataflowSelectorActor(this, group, outputs, inputs, (Closure) code.clone(), (Integer) channels.get(MAX_FORKS));
        } else {
            this.actor = new DataflowSelectorActor(this, group, outputs, inputs, (Closure) code.clone());
        }
        select = new Select(group, inputs);
        guards = Collections.synchronizedList(new ArrayList<Boolean>((int) inputs.size()));
        //fill in the provided or default guard flags
        final List<Boolean> gs = (List<Boolean>) channels.get("guards");
        if (gs != null) {
            for (int i = 0; i < inputs.size(); i++) {

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