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;
return sinks.get(source);
}
+ /**
+ * Returns the traffic counters of the given controlled component.
+ *
+ * @param controlled
+ * The controlled component to get the traffic counters for
+ * @return The traffic counters for the given controlled component
+ */
+ public TrafficCounter trafficCounter(Controlled controlled) {
+ long input = -1;
+ long output = -1;
+ for (Connection connection : connections) {
+ /* the connection where the source matches knows the output. */
+ if (connection.source.equals(controlled)) {
+ output = connection.counter();
+ } else if (connection.sinks.contains(controlled)) {
+ input = connection.counter();
+ }
+ }
+ return new TrafficCounter(input, output);
+ }
+
//
// ACTIONS
//
}
+ /**
+ * 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);
+ }
+
+ }
+
}