Examples of groovyx.gpars.dataflow.DataflowVariable

groovyx.gpars.dataflow.DataflowVariable
Represents a thread-safe single-assignment, multi-read variable. Each instance of DataflowVariable can be read repeatedly any time using the 'val' property and assigned once in its lifetime using the '<<' operator. Reads preceding assignment will be blocked until the value is assigned. For actors and Dataflow Operators the asynchronous non-blocking variants of the getValAsync() methods can be used. They register the request to read a value and will send a message to the actor or operator once the value is available. @param < T> Type of values to bind with the DataflowVariable @author Vaclav Pech, Alex TkachmanDate: Jun 4, 2009

        });
        client.start();
    }


    protected <T> DataflowVariable<T> getPromise(ConcurrentMap<String, DataflowVariable<T>> registry, String name, String host, int port, SerialMsg requestMsg) {
        DataflowVariable remoteVariable = registry.get(name);
        if (remoteVariable == null) {
            DataflowVariable newRemoteVariable = new DataflowVariable<>();
            remoteVariable = registry.putIfAbsent(name, newRemoteVariable);
            if (remoteVariable == null) {
                createRequest(host, port, requestMsg);
                remoteVariable = newRemoteVariable;
            }

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     *
     * @param callable The task body to run
     * @return A DataflowVariable, which gets assigned the value returned from the supplied code
     */
    public final <T> Promise<T> task(final Callable<T> callable) {
        final DataflowVariable result = new DataflowVariable();
        threadPool.execute(new Runnable() {
            @SuppressWarnings("OverlyBroadCatchBlock")
            @Override
            public void run() {
                Dataflow.activeParallelGroup.set(PGroup.this);
                try {
                    //noinspection OverlyBroadCatchBlock
                    try {
                        result.bind(callable.call());
                    } catch (Throwable e) {
                        result.bind(e);
                    }
                } finally {
                    Dataflow.activeParallelGroup.remove();
                }
            }

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     * @param code The task body to run
     * @return A DataflowVariable, which gets bound to null once the supplied code finishes
     */
    public final Promise<Object> task(final Runnable code) {
        if (code instanceof Closure) return task((Closure) code);
        final DataflowVariable result = new DataflowVariable();
        threadPool.execute(new Runnable() {
            @Override
            public void run() {
                Dataflow.activeParallelGroup.set(PGroup.this);
                try {
                    try {
                        code.run();
                        result.bind(null);
                    } catch (Throwable e) {
                        result.bind(e);
                    }
                } finally {
                    Dataflow.activeParallelGroup.remove();
                }
            }

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            throw new IllegalArgumentException("Cannot run whenAllBound(), since the number of promises does not match the number of arguments to the supplied closure.");
        }
        for (final Promise promise : promises) {
            promise.touch();
        }
        final DataflowVariable result = new DataflowVariable();
        whenAllBound(promises, 0, new ArrayList<Object>(promises.size()), result, code, errorHandler);
        return result;
    }

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