Example usage for com.google.common.collect Iterables tryFind

List of usage examples for com.google.common.collect Iterables tryFind

  1. HOME
  2. Java
  3. com.google.common
  4. com.google.common.collect.*
  5. Iterables
  6. tryFind

Introduction

In this page you can find the example usage for com.google.common.collect Iterables tryFind.

Prototype

public static <T> Optional<T> tryFind(Iterable<T> iterable, Predicate<? super T> predicate)

Source Link

Document

Returns an Optional containing the first element in iterable that satisfies the given predicate, if such an element exists.

Usage

From source file:forge.util.storage.StorageBase.java

@Override
public T find(Predicate<T> condition) {
    return Iterables.tryFind(map.values(), condition).orNull();
}

From source file:com.bennavetta.vetinari.template.TemplateLoader.java

@Inject
public TemplateLoader(VetinariContext context, Set<TemplateEngine> templateEngines) {
    this.context = context;
    this.templateEngines = templateEngines;
    this.defaultTemplateEngine = Iterables.find(this.templateEngines,
            t -> t.getName().equals(this.context.getSiteConfig().getString("defaultTemplateEngine")));

    this.templateCache = CacheBuilder.newBuilder().build(new CacheLoader<String, Template>() {
        @Override//  w  w  w  .j ava  2 s  . co m
        public Template load(String templateName) throws Exception {
            final Path templatePath = context.getTemplateRoot().resolve(templateName);
            final String extension = getFileExtension(templateName);
            final TemplateEngine engine = Iterables
                    .tryFind(templateEngines, t -> Iterables.contains(t.getFileExtensions(), extension))
                    .or(defaultTemplateEngine);
            log.debug("Compiling template from {} with {}", templatePath, engine);
            String source = new String(Files.readAllBytes(templatePath), context.getContentEncoding());
            log.trace("Read template source \"{}\"", source);
            return engine.compile(source);
        }
    });
}

From source file:org.ow2.petals.cloud.manager.openstack.commands.BaseCommand.java

protected Nova getClient() throws CloudManagerException {
    Provider provider = checkNotNull(
            Iterables.tryFind(providerRegistryService.get(), new Predicate<Provider>() {
                public boolean apply(org.ow2.petals.cloud.manager.api.deployment.Provider input) {
                    return input.getName().equals(account);
                }//  w  w  w.j  av  a 2 s  .  c  om
            }).orNull(), "Can not retrieve account %s from the registry", account);

    return Utils.getClient(provider, connector);
}

From source file:org.ow2.petals.cloud.manager.ec2.commands.BaseCommand.java

protected AmazonEC2 getClient() throws CloudManagerException {
    Provider provider = checkNotNull(
            Iterables.tryFind(providerRegistryService.get(), new Predicate<Provider>() {
                public boolean apply(org.ow2.petals.cloud.manager.api.deployment.Provider input) {
                    return input.getName().equals(account);
                }/*from  www  .  j a  v a 2 s  . com*/
            }).orNull(), "Can not retrieve account %s from the registry", account);

    Credentials credentials = provider.getCredentials();
    AWSCredentials awsCredentials = new BasicAWSCredentials(credentials.getPublicKey(),
            credentials.getPrivateKey());
    AmazonEC2 ec2 = new AmazonEC2Client(awsCredentials);
    ec2.setEndpoint(provider.getEndpoint());
    // TODO in properties
    //ec2.setRegion(provider.getRegion());
    ec2.setRegion(Region.getRegion(Regions.DEFAULT_REGION));
    return ec2;
}

From source file:org.apache.druid.query.topn.NumericTopNMetricSpec.java

@Override
public void verifyPreconditions(List<AggregatorFactory> aggregatorSpecs,
        List<PostAggregator> postAggregatorSpecs) {
    Preconditions.checkNotNull(metric, "metric can't be null");
    Preconditions.checkNotNull(aggregatorSpecs, "aggregations cannot be null");
    Preconditions.checkArgument(aggregatorSpecs.size() > 0 || postAggregatorSpecs.size() > 0,
            "Must have at least one AggregatorFactory or PostAggregator");

    final AggregatorFactory aggregator = Iterables.tryFind(aggregatorSpecs, new Predicate<AggregatorFactory>() {
        @Override//from   w  w  w .  j  a  v a  2s.c o  m
        public boolean apply(AggregatorFactory input) {
            return input.getName().equals(metric);
        }
    }).orNull();

    final PostAggregator postAggregator = Iterables
            .tryFind(postAggregatorSpecs, new Predicate<PostAggregator>() {
                @Override
                public boolean apply(PostAggregator input) {
                    return input.getName().equals(metric);
                }
            }).orNull();

    Preconditions.checkArgument(aggregator != null || postAggregator != null,
            "Must have an AggregatorFactory or PostAggregator for metric[%s], gave[%s] and [%s]", metric,
            aggregatorSpecs, postAggregatorSpecs);
}

From source file:stormy.pythian.core.topology.AvailableComponentPool.java

public ComponentConfiguration getAvailableComponent() {
    return Iterables.tryFind(components, IS_AVAILABLE).orNull();
}

From source file:org.apache.brooklyn.entity.nosql.redis.RedisStoreImpl.java

@Override
protected void connectSensors() {
    super.connectSensors();

    connectServiceUpIsRunning();/*from w ww .j  av  a 2s. c o m*/

    // Find an SshMachineLocation for the UPTIME feed
    Optional<Location> location = Iterables.tryFind(getLocations(),
            Predicates.instanceOf(SshMachineLocation.class));
    if (!location.isPresent())
        throw new IllegalStateException("Could not find SshMachineLocation in list of locations");
    SshMachineLocation machine = (SshMachineLocation) location.get();
    String statsCommand = getDriver().getRunDir() + "/bin/redis-cli -p " + getRedisPort() + " info stats";
    boolean retrieveUsageMetrics = getConfig(RETRIEVE_USAGE_METRICS);

    sshFeed = SshFeed.builder().entity(this).machine(machine).period(5, TimeUnit.SECONDS)
            .poll(new SshPollConfig<Integer>(UPTIME)
                    .command(getDriver().getRunDir() + "/bin/redis-cli -p " + getRedisPort() + " info server")
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("uptime_in_seconds"))
                    .enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(TOTAL_CONNECTIONS_RECEIVED).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1))
                    .onSuccess(infoFunction("total_connections_received")).enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(TOTAL_COMMANDS_PROCESSED).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1))
                    .onSuccess(infoFunction("total_commands_processed")).enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(EXPIRED_KEYS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("expired_keys"))
                    .enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(EVICTED_KEYS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("evicted_keys"))
                    .enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(KEYSPACE_HITS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("keyspace_hits"))
                    .enabled(retrieveUsageMetrics))
            .poll(new SshPollConfig<Integer>(KEYSPACE_MISSES).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("keyspace_misses"))
                    .enabled(retrieveUsageMetrics))
            .build();
}

From source file:org.apache.brooklyn.core.location.access.PortForwardManagerLocationResolver.java

@Override
public Location newLocationFromString(Map locationFlags, String spec, LocationRegistry registry) {
    ConfigBag config = extractConfig(locationFlags, spec, registry);
    Map globalProperties = registry.getProperties();
    String namedLocation = (String) locationFlags.get(LocationInternal.NAMED_SPEC_NAME.getName());
    String scope = config.get(PortForwardManager.SCOPE);

    Optional<Location> result = Iterables.tryFind(managementContext.getLocationManager().getLocations(),
            Predicates.and(Predicates.instanceOf(PortForwardManager.class),
                    LocationPredicates.configEqualTo(PortForwardManager.SCOPE, scope)));

    if (result.isPresent()) {
        return result.get();
    } else {//from w ww  . j  a  v a  2s .  c o  m
        PortForwardManager loc = managementContext.getLocationManager()
                .createLocation(LocationSpec.create(PortForwardManagerImpl.class)
                        .configure(config.getAllConfig()).configure(LocationConfigUtils
                                .finalAndOriginalSpecs(spec, locationFlags, globalProperties, namedLocation)));

        if (LOG.isDebugEnabled())
            LOG.debug("Created " + loc + " for scope " + scope);
        return loc;
    }
}

From source file:com.eucalyptus.config.ws.PropertiesRequestLoggingFilter.java

@Override
public Collection<String> apply(final Collection<String> parametersOrBody) {
    if (Iterables.tryFind(ACTION_NVPS, Predicates.in(parametersOrBody)).isPresent()) {
        final Optional<String> nameParameterAndValue = Iterables.tryFind(parametersOrBody,
                Strings.startsWith(NAME_PARAMETER));
        final Optional<String> valueParameterAndValue = Iterables.tryFind(parametersOrBody,
                Strings.startsWith(VALUE_PARAMETER));

        if (nameParameterAndValue.isPresent() && valueParameterAndValue.isPresent())
            try {
                final ConfigurableProperty entry = PropertyDirectory
                        .getPropertyEntry(Strings.trimPrefix(NAME_PARAMETER, nameParameterAndValue.get()));
                if (ConfigurableFieldType.KEYVALUEHIDDEN == entry.getWidgetType()) {
                    final ArrayList<String> parametersCopy = Lists.newArrayList(parametersOrBody);
                    parametersCopy.set(parametersCopy.indexOf(valueParameterAndValue.get()),
                            VALUE_PARAMETER_REDACTED);
                    return parametersCopy;
                }/* ww w.  jav a  2  s. c  o  m*/
            } catch (IllegalAccessException e) {
                // property not found
            }
    }

    return parametersOrBody;
}

From source file:org.eclipse.emf.compare.uml2.internal.provider.decorator.StereotypeReferenceChangeItemProviderDecorator.java

/**
 * Retrieves the {@link ReferenceChange} which is refined by the {@link StereotypeReferenceChange}.
 * // ww w  .  j  av a2s .  c o m
 * @param diff
 *            Input object. .
 * @return an {@link ReferenceChange} if the input is a {@link StereotypeReferenceChange} which is refined
 *         by an {@link ReferenceChange} or <code>null</code> otherwise.
 */
private ReferenceChange getReferenceChange(Object diff) {
    ReferenceChange referenceChange = null;
    if (diff instanceof StereotypeReferenceChange) {
        StereotypeReferenceChange stereotypeReferenceChange = (StereotypeReferenceChange) diff;
        Optional<Diff> element = Iterables.tryFind(stereotypeReferenceChange.getRefinedBy(),
                Predicates.instanceOf(ReferenceChange.class));
        if (element.isPresent()) {
            referenceChange = (ReferenceChange) element.get();
        }
    }
    return referenceChange;
}