import java.io.IOException;
import java.util.Collection;
+import java.util.Iterator;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.logging.Logger;
import com.google.common.base.Function;
+import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.FluentIterable;
+import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
-public class Pipeline {
+public class Pipeline implements Iterable<ControlledComponent> {
/** The logger. */
private static final Logger logger = Logger.getLogger(Pipeline.class.getName());
/** The sinks for each source. */
private final Multimap<Source, Sink> sinks;
- /** All started feeders. */
- private final List<Feeder> feeders = Lists.newArrayList();
+ /** All started connections. */
+ private final List<Connection> connections = Lists.newArrayList();
/**
* Creates a new pipeline.
private Pipeline(Source source, Multimap<Source, Sink> sinks) {
this.source = Preconditions.checkNotNull(source, "source must not be null");
this.sinks = Preconditions.checkNotNull(sinks, "sinks must not be null");
+ for (ControlledComponent component : Lists.reverse(components())) {
+ logger.finest(String.format("Adding Listener to %s.", component.name()));
+ component.addMetadataListener(new MetadataListener() {
+ @Override
+ public void metadataUpdated(ControlledComponent component, Metadata metadata) {
+ if (!(component instanceof Source)) {
+ return;
+ }
+ for (ControlledComponent controlledComponent : sinks((Source) component)) {
+ logger.fine(String.format("Updating Metadata from %s to %s as %s.", component.name(), controlledComponent.name(), metadata));
+ controlledComponent.metadataUpdated(metadata);
+ }
+ }
+ });
+ }
+ }
+
+ //
+ // ACCESSORS
+ //
+
+ /**
+ * Expose this pipeline’s source.
+ *
+ * @return This pipeline’s source
+ */
+ public Source source() {
+ return source;
+ }
+
+ /**
+ * Returns all {@link Sink}s (or {@link Filter}s, really) that are connected to
+ * the given source.
+ *
+ * @param source
+ * The source to get the sinks for
+ * @return The sinks connected to the given source, or an empty list if the
+ * source does not exist in this pipeline
+ */
+ public Collection<Sink> sinks(Source source) {
+ return sinks.get(source);
+ }
+
+ /**
+ * Returns the traffic counters of the given controlled component.
+ *
+ * @param controlledComponent
+ * The controlled component to get the traffic counters for
+ * @return The traffic counters for the given controlled component
+ */
+ public TrafficCounter trafficCounter(ControlledComponent controlledComponent) {
+ long input = -1;
+ long output = -1;
+ for (Connection connection : connections) {
+ /* the connection where the source matches knows the output. */
+ if (connection.source.equals(controlledComponent)) {
+ output = connection.counter();
+ } else if (connection.sinks.contains(controlledComponent)) {
+ input = connection.counter();
+ }
+ }
+ return new TrafficCounter(input, output);
}
//
* if the pipeline is already running
*/
public void start() throws IOException, IllegalStateException {
- if (!feeders.isEmpty()) {
+ if (!connections.isEmpty()) {
throw new IllegalStateException("Pipeline is already running!");
}
List<Source> sources = Lists.newArrayList();
while (!sources.isEmpty()) {
Source source = sources.remove(0);
Collection<Sink> sinks = this.sinks.get(source);
- feeders.add(new Feeder(source, sinks));
+ connections.add(new Connection(source, sinks));
for (Sink sink : sinks) {
+ logger.info(String.format("Opening %s with %s...", sink.name(), source.metadata()));
sink.open(source.metadata());
if (sink instanceof Filter) {
sources.add((Source) sink);
}
}
}
- for (Feeder feeder : feeders) {
- logger.info(String.format("Starting Feeder from %s to %s.", feeder.source, feeder.sinks));
- new Thread(feeder).start();
+ for (Connection connection : connections) {
+ logger.info(String.format("Starting Connection from %s to %s.", connection.source.name(), FluentIterable.from(connection.sinks).transform(new Function<Sink, String>() {
+ @Override
+ public String apply(Sink sink) {
+ return sink.name();
+ }
+ })));
+ new Thread(connection).start();
}
}
public void stop() {
- if (!feeders.isEmpty()) {
+ if (!connections.isEmpty()) {
/* pipeline is not running. */
return;
}
- for (Feeder feeder : feeders) {
- feeder.stop();
+ for (Connection connection : connections) {
+ connection.stop();
+ }
+ }
+
+ //
+ // ITERABLE METHODS
+ //
+
+ @Override
+ public Iterator<ControlledComponent> iterator() {
+ return components().iterator();
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+
+ /**
+ * Returns all components of this pipeline, listed breadth-first, starting with
+ * the source.
+ *
+ * @return All components of this pipeline
+ */
+ public List<ControlledComponent> components() {
+ ImmutableList.Builder<ControlledComponent> components = ImmutableList.builder();
+ List<ControlledComponent> currentComponents = Lists.newArrayList();
+ components.add(source);
+ currentComponents.add(source);
+ while (!currentComponents.isEmpty()) {
+ Collection<Sink> sinks = this.sinks((Source) currentComponents.remove(0));
+ for (Sink sink : sinks) {
+ components.add(sink);
+ if (sink instanceof Source) {
+ currentComponents.add(sink);
+ }
+ }
}
+ return components.build();
}
//
}
/**
- * A feeder is responsible for streaming audio from one {@link Source} to an
- * arbitrary number of {@link Sink}s it is connected to. A feeder is started by
- * creating a {@link Thread} wrapping it and starting said thread.
+ * A connection is responsible for streaming audio from one {@link Source} to
+ * an arbitrary number of {@link Sink}s it is connected to. A connection is
+ * started by creating a {@link Thread} wrapping it and starting said thread.
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
- private class Feeder implements Runnable {
+ public class Connection implements Runnable {
/** The source. */
private final Source source;
/** The executor service. */
private final ExecutorService executorService;
+ /** The number of copied bytes. */
+ private long counter;
+
/**
- * Creates a new feeder.
+ * Creates a new connection.
*
* @param source
* The source of the stream
* @param sinks
* The sinks to which to stream
*/
- public Feeder(Source source, Collection<Sink> sinks) {
+ public Connection(Source source, Collection<Sink> sinks) {
this.source = source;
this.sinks = sinks;
if (sinks.size() == 1) {
}
//
+ // ACCESSORS
+ //
+
+ /**
+ * Returns the number of bytes that this connection has received from its
+ * source during its lifetime.
+ *
+ * @return The number of processed input bytes
+ */
+ public long counter() {
+ return counter;
+ }
+
+ //
// ACTIONS
//
- /** Stops this feeder. */
+ /** Stops this connection. */
public void stop() {
stopped.set(true);
}
Metadata firstMetadata = null;
while (!stopped.get()) {
try {
- final Metadata lastMetadata = firstMetadata;
- final Metadata metadata = firstMetadata = source.metadata();
final byte[] buffer;
try {
logger.finest(String.format("Getting %d bytes from %s...", 4096, source));
@Override
public Void call() throws Exception {
- if (!metadata.equals(lastMetadata)) {
- sink.metadataUpdated(metadata);
- }
try {
logger.finest(String.format("Sending %d bytes to %s.", buffer.length, sink));
sink.process(buffer);
for (Future<Void> future : futures) {
future.get();
}
+ counter += buffer.length;
} catch (IOException e) {
/* TODO */
e.printStackTrace();
}
+ /**
+ * Container for input and output counters.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+ public static class TrafficCounter {
+
+ /** The number of input bytes. */
+ private final long input;
+
+ /** The number of output bytes. */
+ private final long output;
+
+ /**
+ * Creates a new traffic counter.
+ *
+ * @param input
+ * The number of input bytes (may be {@code -1} to signify non-available
+ * input)
+ * @param output
+ * The number of output bytes (may be {@code -1} to signify non-available
+ * output)
+ */
+ public TrafficCounter(long input, long output) {
+ this.input = input;
+ this.output = output;
+ }
+
+ //
+ // ACCESSORS
+ //
+
+ /**
+ * Returns the number of input bytes.
+ *
+ * @return The number of input bytes, or {@link Optional#absent()} if the
+ * component can not receive input
+ */
+ public Optional<Long> input() {
+ return (input == -1) ? Optional.<Long>absent() : Optional.of(input);
+ }
+
+ /**
+ * Returns the number of output bytes.
+ *
+ * @return The number of output bytes, or {@link Optional#absent()} if the
+ * component can not send output
+ */
+ public Optional<Long> output() {
+ return (output == -1) ? Optional.<Long>absent() : Optional.of(output);
+ }
+
+ }
+
}
projects / sonitus.git / blobdiff