1 package net.pterodactylus.fcp.quelaton;
3 import java.io.IOException;
4 import java.util.Optional;
5 import java.util.concurrent.ExecutionException;
6 import java.util.concurrent.ExecutorService;
7 import java.util.concurrent.atomic.AtomicBoolean;
8 import java.util.concurrent.atomic.AtomicReference;
10 import net.pterodactylus.fcp.IdentifierCollision;
11 import net.pterodactylus.fcp.SubscribeUSK;
12 import net.pterodactylus.fcp.SubscribedUSK;
14 import com.google.common.util.concurrent.ListenableFuture;
15 import com.google.common.util.concurrent.ListeningExecutorService;
16 import com.google.common.util.concurrent.MoreExecutors;
19 * Default {@link SubscribeUskCommand} implementation based on {@link FcpDialog}.
21 * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
23 public class SubscribeUskCommandImpl implements SubscribeUskCommand {
25 private static final RandomIdentifierGenerator IDENTIFIER = new RandomIdentifierGenerator();
26 private final ListeningExecutorService threadPool;
27 private final ConnectionSupplier connectionSupplier;
28 private final SubscribeUSK subscribeUSK = new SubscribeUSK(IDENTIFIER.generate());
30 public SubscribeUskCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
31 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
32 this.connectionSupplier = connectionSupplier;
36 public Executable<Optional<UskSubscription>> uri(String uri) {
37 subscribeUSK.setUri(uri);
41 private ListenableFuture<Optional<UskSubscription>> execute() {
42 return threadPool.submit(this::executeDialog);
45 private Optional<UskSubscription> executeDialog() throws IOException, ExecutionException, InterruptedException {
46 try (SubscribeUskDialog subscribeUskDialog = new SubscribeUskDialog()) {
47 return subscribeUskDialog.send(subscribeUSK).get();
51 private class SubscribeUskDialog extends FcpDialog<Optional<UskSubscription>> {
53 private final AtomicBoolean finished = new AtomicBoolean();
54 private final AtomicReference<SubscribedUSK> subscribedUSK = new AtomicReference<>();
56 public SubscribeUskDialog() throws IOException {
57 super(threadPool, connectionSupplier.get());
61 protected boolean isFinished() {
62 return finished.get();
66 protected Optional<UskSubscription> getResult() {
67 return Optional.ofNullable(subscribedUSK.get()).map(subscribedUSK -> new UskSubscription() {
69 public String getUri() {
70 return subscribedUSK.getURI();
76 protected void consumeSubscribedUSK(SubscribedUSK subscribedUSK) {
77 this.subscribedUSK.set(subscribedUSK);
82 protected void consumeIdentifierCollision(IdentifierCollision identifierCollision) {