Example usage for com.google.common.util.concurrent FutureFallback FutureFallback

Introduction

In this page you can find the example usage for com.google.common.util.concurrent FutureFallback FutureFallback.

Prototype

FutureFallback

Source Link

Usage

From source file:io.v.impl.google.lib.discovery.DiscoveryImpl.java

@Override
public ListenableFuture<Void> advertise(VContext ctx, Advertisement ad, List<BlessingPattern> visibility)
        throws VException {
    ListenableFutureCallback<Void> cb = new ListenableFutureCallback<>();
    nativeAdvertise(nativeRef, ctx, ad, visibility, cb);
    return Futures.withFallback(cb.getFuture(ctx), new FutureFallback<Void>() {
        public ListenableFuture<Void> create(Throwable t) {
            if (t instanceof CancellationException) {
                return Futures.immediateFuture(null);
            }//from   w w  w  .  ja  v a 2s  . c  o m
            return Futures.immediateFailedFuture(t);
        }
    });
}

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From source file:io.crate.executor.transport.task.AsyncChainedTask.java

protected AsyncChainedTask() {
    result = SettableFuture.create();/*from   ww  w.  j a  v a 2 s.  co  m*/
    ListenableFuture<TaskResult> resultFallback = Futures.withFallback(result,
            new FutureFallback<TaskResult>() {
                @Override
                public ListenableFuture<TaskResult> create(@Nonnull Throwable t) throws Exception {
                    return Futures.immediateFuture((TaskResult) RowCountResult.error(t));
                }
            });
    resultList = new ArrayList<>();
    resultList.add(resultFallback);
}

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From source file:org.onos.yangtools.yang.model.repo.util.AbstractSchemaRepository.java

private static final <T extends SchemaSourceRepresentation> CheckedFuture<T, SchemaSourceException> fetchSource(
        final SourceIdentifier id, final Iterator<AbstractSchemaSourceRegistration<?>> it) {
    final AbstractSchemaSourceRegistration<?> reg = it.next();

    @SuppressWarnings("unchecked")
    final CheckedFuture<? extends T, SchemaSourceException> f = ((SchemaSourceProvider<T>) reg.getProvider())
            .getSource(id);/*  w  w w.java2  s  .c  o  m*/

    return Futures.makeChecked(Futures.withFallback(f, new FutureFallback<T>() {
        @Override
        public ListenableFuture<T> create(final Throwable t) throws SchemaSourceException {
            LOG.debug("Failed to acquire source from {}", reg, t);

            if (it.hasNext()) {
                return fetchSource(id, it);
            }

            throw new MissingSchemaSourceException("All available providers exhausted", id, t);
        }
    }), FETCH_MAPPER);
}

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From source file:org.opendaylight.yangtools.yang.model.repo.util.AbstractSchemaRepository.java

private static <T extends SchemaSourceRepresentation> CheckedFuture<T, SchemaSourceException> fetchSource(
        final SourceIdentifier id, final Iterator<AbstractSchemaSourceRegistration<?>> it) {
    final AbstractSchemaSourceRegistration<?> reg = it.next();

    @SuppressWarnings("unchecked")
    final CheckedFuture<? extends T, SchemaSourceException> f = ((SchemaSourceProvider<T>) reg.getProvider())
            .getSource(id);/*from  w  w  w .j  a  v  a  2 s  .c  om*/

    return Futures.makeChecked(Futures.withFallback(f, new FutureFallback<T>() {
        @Override
        public ListenableFuture<T> create(@Nonnull final Throwable t) throws SchemaSourceException {
            LOG.debug("Failed to acquire source from {}", reg, t);

            if (it.hasNext()) {
                return fetchSource(id, it);
            }

            throw new MissingSchemaSourceException("All available providers exhausted", id, t);
        }
    }), FETCH_MAPPER);
}

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From source file:com.spotify.helios.client.HeliosClient.java

public ListenableFuture<VersionResponse> version() {
    // Create a fallback in case we fail to connect to the master. Return null if this happens.
    // The transform below will handle this and return an appropriate error message to the caller.
    final ListenableFuture<Response> futureWithFallback = withFallback(request(uri("/version/"), "GET"),
            new FutureFallback<Response>() {
                @Override/*from  ww w.j a  v a  2 s  .  c  o  m*/
                public ListenableFuture<Response> create(@NotNull Throwable t) throws Exception {
                    return immediateFuture(null);
                }
            });

    return transform(futureWithFallback, new AsyncFunction<Response, VersionResponse>() {
        @Override
        public ListenableFuture<VersionResponse> apply(@NotNull Response reply) throws Exception {
            final String masterVersion = reply == null ? "Unable to connect to master"
                    : reply.status() == HTTP_OK ? Json.read(reply.payload(), String.class)
                            : "Master replied with error code " + reply.status();

            return immediateFuture(new VersionResponse(Version.POM_VERSION, masterVersion));
        }
    });
}

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From source file:com.spotify.helios.testing.HeliosSoloDeployment.java

private <T> T getOrNull(final ListenableFuture<T> future) throws ExecutionException, InterruptedException {
    return Futures.withFallback(future, new FutureFallback<T>() {
        @Override/*from  www .java 2  s.  com*/
        public ListenableFuture<T> create(@NotNull final Throwable t) throws Exception {
            return Futures.immediateFuture(null);
        }
    }).get();
}

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From source file:org.rhq.enterprise.server.cloud.StorageNodeManagerBean.java

private ListenableFuture<StorageNodeLoadComposite> wrapFuture(ListenableFuture<StorageNodeLoadComposite> future,
        final StorageNodeLoadComposite value, final String msg) {
    return Futures.withFallback(future, new FutureFallback<StorageNodeLoadComposite>() {
        @Override/* w w  w  .j a  v a2  s. c om*/
        public ListenableFuture<StorageNodeLoadComposite> create(Throwable t) throws Exception {
            if (log.isDebugEnabled()) {
                log.debug(msg, t);
            } else {
                log.info(msg + ": " + t.getMessage());
            }
            return Futures.immediateFuture(value);
        }
    });
}

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From source file:com.spotify.helios.system.SystemTestBase.java

protected <T> T getOrNull(final ListenableFuture<T> future) throws ExecutionException, InterruptedException {
    return Futures.withFallback(future, new FutureFallback<T>() {
        @Override/*from  ww w  .  j  a  v a2 s.  co m*/
        public ListenableFuture<T> create(@NotNull final Throwable t) throws Exception {
            return Futures.immediateFuture(null);
        }
    }).get();
}

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