Example usage for com.google.common.collect Iterables 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:org.apache.brooklyn.entity.messaging.kafka.KafkaSupport.java

/**
 * Retrieve the next message on the given topic from the {@link KafkaCluster}.
 *//*  www .j ava2 s  .  c  o  m*/
public String getMessage(String topic) {
    ZooKeeperNode zookeeper = cluster.getZooKeeper();
    Optional<Entity> anyBrokerNodeInCluster = Iterables.tryFind(cluster.getCluster().getChildren(),
            Predicates.and(Predicates.instanceOf(KafkaBroker.class),
                    EntityPredicates.attributeEqualTo(KafkaBroker.SERVICE_UP, true)));
    if (anyBrokerNodeInCluster.isPresent()) {
        KafkaBroker broker = (KafkaBroker) anyBrokerNodeInCluster.get();

        Properties props = new Properties();

        props.put("bootstrap.servers",
                format("%s:%d", broker.getAttribute(KafkaBroker.HOSTNAME), broker.getKafkaPort()));
        props.put("zookeeper.connect", format(zookeeper.getHostname(), zookeeper.getZookeeperPort()));
        props.put("group.id", "brooklyn");
        props.put("partition.assignment.strategy", "RoundRobin");
        props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

        KafkaConsumer consumer = new KafkaConsumer(props);

        consumer.subscribe(topic);
        // FIXME unimplemented KafkaConsumer.poll
        //            Object consumerRecords = consumer.poll(Duration.seconds(3).toMilliseconds()).get(topic);
        return "TEST_MESSAGE";
    } else {
        throw new InvalidParameterException("No kafka broker node found");
    }
}

From source file:gg.uhc.githubreleasechecker.ReleaseChecker.java

public UpdateResponse checkForUpdate() throws IOException {
    return new UpdateResponse(installed,
            Iterables.tryFind(ImmutableList.copyOf(queryer.queryReleases()), isNewerThanInstalled).orNull());
}

From source file:net.seedboxer.core.logic.ContentManager.java

private boolean isContentIn(Content content, List<Content> historyContentOfType) {
    Optional<Content> find = Iterables.tryFind(historyContentOfType, Predicates.equalTo(content));
    return find.isPresent();
}

From source file:broadwick.model.Model.java

/**
 * Determine whether or not a parameter exists in the config file.
 * @param name the name of the parameter.
 * @return true if the parameter exists in the config file, false otherwise.
 *///ww w.  j  a v a  2  s . c o m
public final boolean hasParameter(final String name) {
    return Iterables.tryFind(parameters, new Predicate<Parameter>() {
        @Override
        public boolean apply(final Parameter parameter) {
            return name.equals(parameter.getId());
        }
    }).isPresent();
}

From source file:com.google.api.tools.framework.aspects.endpoint.model.EndpointUtil.java

private static Endpoint getEndpointConfig(Model model, final String endpoint) {
    List<Endpoint> endpointConfigs = model.getAttribute(ENDPOINTS_KEY);
    return Iterables.tryFind(endpointConfigs, new Predicate<Endpoint>() {
        @Override/*from  w  w w .  j av a  2s  .co  m*/
        public boolean apply(Endpoint input) {
            return endpoint.equals(input.getName());
        }
    }).orNull();
}

From source file:brooklyn.entity.nosql.couchbase.CouchbaseSyncGatewaySshDriver.java

@Override
public void launch() {
    Entity cbNode = entity.getConfig(CouchbaseSyncGateway.COUCHBASE_SERVER);
    Entities.waitForServiceUp(cbNode, Duration.ONE_HOUR);
    DependentConfiguration.waitInTaskForAttributeReady(cbNode, CouchbaseCluster.IS_CLUSTER_INITIALIZED,
            Predicates.equalTo(true));/*  www.j  a  va 2s .co  m*/
    // Even once the bucket has published its API URL, it can still take a couple of seconds for it to become available
    Time.sleep(10 * 1000);
    if (cbNode instanceof CouchbaseCluster) {
        Optional<Entity> cbClusterNode = Iterables.tryFind(cbNode.getAttribute(CouchbaseCluster.GROUP_MEMBERS),
                new Predicate<Entity>() {

                    @Override
                    public boolean apply(@Nullable Entity entity) {
                        // Must either be recognised by a cluster as added, or be the primary node in a cluster of ONE.
                        return entity instanceof CouchbaseNode && (Boolean.TRUE
                                .equals(entity.getAttribute(CouchbaseNode.IS_IN_CLUSTER))
                                || Boolean.TRUE.equals(entity.getAttribute(CouchbaseNode.IS_PRIMARY_NODE)));
                    }
                });
        if (cbClusterNode.isPresent()) {
            cbNode = cbClusterNode.get();
        } else {
            throw new IllegalArgumentException(
                    format("The cluster %s does not contain any suitable Couchbase nodes to connect to..",
                            cbNode.getId()));
        }

    }
    String hostname = cbNode.getAttribute(CouchbaseNode.HOSTNAME);
    String webPort = cbNode.getAttribute(CouchbaseNode.COUCHBASE_WEB_ADMIN_PORT).toString();

    String username = cbNode.getConfig(CouchbaseNode.COUCHBASE_ADMIN_USERNAME);
    String password = cbNode.getConfig(CouchbaseNode.COUCHBASE_ADMIN_PASSWORD);

    String bucketName = entity.getConfig(CouchbaseSyncGateway.COUCHBASE_SERVER_BUCKET);
    String pool = entity.getConfig(CouchbaseSyncGateway.COUCHBASE_SERVER_POOL);
    String pretty = entity.getConfig(CouchbaseSyncGateway.PRETTY) ? "-pretty" : "";
    String verbose = entity.getConfig(CouchbaseSyncGateway.VERBOSE) ? "-verbose" : "";

    String adminRestApiPort = entity.getConfig(CouchbaseSyncGateway.ADMIN_REST_API_PORT).iterator().next()
            .toString();
    String syncRestApiPort = entity.getConfig(CouchbaseSyncGateway.SYNC_REST_API_PORT).iterator().next()
            .toString();

    String serverWebAdminUrl = format("http://%s:%s@%s:%s", username, password, hostname, webPort);
    String options = format(
            "-url %s -bucket %s -adminInterface 0.0.0.0:%s -interface 0.0.0.0:%s -pool %s %s %s",
            serverWebAdminUrl, bucketName, adminRestApiPort, syncRestApiPort, pool, pretty, verbose);

    newScript(ImmutableMap.of("usePidFile", true), LAUNCHING).body
            .append(format("/opt/couchbase-sync-gateway/bin/sync_gateway %s ", options)
                    + "> out.log 2> err.log < /dev/null &")
            .failOnNonZeroResultCode().execute();
}

From source file:org.killbill.automaton.DefaultStateMachineConfig.java

public LinkStateMachine findLinkStateMachine(final StateMachine srcStateMachine, final State srcState,
        final StateMachine dstStateMachine) throws MissingEntryException {

    try {/*from  ww  w.jav a 2 s . c o  m*/
        return Iterables.tryFind(ImmutableList.<LinkStateMachine>copyOf(linkStateMachines),
                new Predicate<LinkStateMachine>() {
                    @Override
                    public boolean apply(final LinkStateMachine input) {
                        return input.getInitialStateMachine().getName().equals(srcStateMachine.getName())
                                && input.getInitialState().getName().equals(srcState.getName())
                                && input.getFinalStateMachine().getName().equals(dstStateMachine.getName());
                    }
                }).get();
    } catch (IllegalStateException e) {
        throw new MissingEntryException("Missing transition for srcStateMachine " + srcStateMachine.getName()
                + ", srcState = " + srcState.getName() + ", dstStateMachine = " + dstStateMachine.getName(), e);
    }
}

From source file:org.eclipse.rcptt.internal.launching.ExecutionStatus.java

public IStatus getCause(boolean flatten) {
    IStatus cause = Iterables.tryFind(Arrays.asList(getChildren()), IS_FAILED).orNull();
    if (flatten && cause instanceof ExecutionStatus) {
        return ((ExecutionStatus) cause).getCause(flatten);
    }//from  ww w .  j  a  v  a  2  s .  c  om
    return cause;
}

From source file:org.apache.brooklyn.entity.nosql.riak.RiakClusterImpl.java

@Override
protected void doStart() {
    super.doStart();
    connectSensors();/*from  w w  w .j a v a2 s .  c  o  m*/

    try {
        Duration delay = getConfig(DELAY_BEFORE_ADVERTISING_CLUSTER);
        Tasks.setBlockingDetails("Sleeping for " + delay + " before advertising cluster available");
        Time.sleep(delay);
    } finally {
        Tasks.resetBlockingDetails();
    }

    //FIXME: add a quorum to tolerate failed nodes before setting on fire.
    @SuppressWarnings("unchecked")
    Optional<Entity> anyNode = Iterables.tryFind(getMembers(),
            Predicates.and(Predicates.instanceOf(RiakNode.class),
                    EntityPredicates.attributeEqualTo(RiakNode.RIAK_NODE_HAS_JOINED_CLUSTER, true),
                    EntityPredicates.attributeEqualTo(RiakNode.SERVICE_UP, true)));
    if (anyNode.isPresent()) {
        sensors().set(IS_CLUSTER_INIT, true);
    } else {
        log.warn("No Riak Nodes are found on the cluster: {}. Initialization Failed", getId());
        ServiceStateLogic.setExpectedState(this, Lifecycle.ON_FIRE);
    }
}

From source file:stormy.pythian.core.configuration.PythianToplogyConfiguration.java

public ConnectionConfiguration findConnectionTo(final String componentId, final String streamName) {
    return Iterables.tryFind(connections, new Predicate<ConnectionConfiguration>() {
        public boolean apply(ConnectionConfiguration input) {
            return input.isTo(componentId, streamName);
        }/*from  w  w w  . ja v a2s.  c o  m*/
    }).orNull();
}