Example usage for com.google.common.base Functions constant

Introduction

In this page you can find the example usage for com.google.common.base Functions constant.

Prototype

public static <E> Function<Object, E> constant(@Nullable E value) 

Source Link

Document

Creates a function that returns value for any input.

Usage

From source file:org.grouplens.lenskit.eval.traintest.FunctionModelMetric.java

@Nonnull
@Override//from  w  w  w . j a v a2s  .c o  m
public List<Object> getResults(List<Object> context) {
    if (context == null) {
        return Lists.transform(columnHeaders, Functions.constant(null));
    } else {
        return context;
    }
}

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From source file:org.apache.brooklyn.entity.nosql.hazelcast.HazelcastNodeImpl.java

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

    if (LOG.isDebugEnabled()) {
        LOG.debug("Connecting sensors for node: {} ", getAttribute(Attributes.HOSTNAME));
    }//from   w w  w  . j a  v  a  2s  . co  m

    HostAndPort hp = BrooklynAccessUtils.getBrooklynAccessibleAddress(this, getNodePort());

    String nodeUri = String.format("http://%s:%d/hazelcast/rest/cluster", hp.getHostText(), hp.getPort());
    sensors().set(Attributes.MAIN_URI, URI.create(nodeUri));

    if (LOG.isDebugEnabled()) {
        LOG.debug("Node {} is using {} as a main URI", this, nodeUri);
    }

    httpFeed = HttpFeed.builder().entity(this).period(3000, TimeUnit.MILLISECONDS).baseUri(nodeUri)
            .poll(new HttpPollConfig<Boolean>(SERVICE_UP).onSuccess(HttpValueFunctions.responseCodeEquals(200))
                    .onFailureOrException(Functions.constant(false)))
            .build();
}

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From source file:com.facebook.presto.sql.planner.assertions.TopNMatcher.java

@Override
public MatchResult detailMatches(PlanNode node, PlanNodeCost planNodeCost, Session session, Metadata metadata,
        SymbolAliases symbolAliases) {//from   w ww .j av  a2 s.c  o m
    checkState(shapeMatches(node),
            "Plan testing framework error: shapeMatches returned false in detailMatches in %s",
            this.getClass().getName());
    TopNNode topNNode = (TopNNode) node;

    if (topNNode.getCount() != count) {
        return NO_MATCH;
    }

    List<Symbol> expectedOrderBy = orderBySymbols.stream().map(alias -> alias.toSymbol(symbolAliases))
            .collect(toImmutableList());

    if (!topNNode.getOrderBy().equals(expectedOrderBy)) {
        return NO_MATCH;
    }

    Map<Symbol, SortOrder> expectedOrderings = Maps.toMap(expectedOrderBy,
            Functions.constant(SortOrder.ASC_NULLS_FIRST));

    if (!topNNode.getOrderings().equals(expectedOrderings)) {
        return NO_MATCH;
    }

    return match();
}

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From source file:brooklyn.entity.nosql.couchdb.CouchDBNodeImpl.java

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

    connectServiceUpIsRunning();//from w w w  . ja  v  a 2s .  c  o m

    httpFeed = HttpFeed.builder().entity(this).period(500, TimeUnit.MILLISECONDS)
            .baseUri(
                    String.format("http://%s:%d/_stats", getAttribute(HOSTNAME), getHttpPort()))
            .poll(new HttpPollConfig<Integer>(REQUEST_COUNT)
                    .onSuccess(HttpValueFunctions.jsonContents(new String[] { "httpd", "requests", "count" },
                            Integer.class))
                    .onFailureOrException(Functions.constant(-1)))
            .poll(new HttpPollConfig<Integer>(ERROR_COUNT)
                    .onSuccess(HttpValueFunctions
                            .jsonContents(new String[] { "httpd_status_codes", "404", "count" }, Integer.class))
                    .onFailureOrException(Functions.constant(-1)))
            .poll(new HttpPollConfig<Integer>(TOTAL_PROCESSING_TIME)
                    .onSuccess(
                            HttpValueFunctions.jsonContents(new String[] { "couchdb", "request_time", "count" },
                                    Integer.class))
                    .onFailureOrException(Functions.constant(-1)))
            .poll(new HttpPollConfig<Integer>(MAX_PROCESSING_TIME)
                    .onSuccess(
                            HttpValueFunctions.chain(
                                    HttpValueFunctions.jsonContents(
                                            new String[] { "couchdb", "request_time", "max" }, Double.class),
                                    new Function<Double, Integer>() {
                                        @Override
                                        public Integer apply(@Nullable Double input) {
                                            return Integer.valueOf(input.intValue());
                                        }
                                    }))
                    .onFailureOrException(Functions.constant(-1)))
            .build();

    WebAppServiceMethods.connectWebAppServerPolicies(this);
}

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From source file:brooklyn.entity.webapp.jboss.JBoss6ServerImpl.java

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

    String requestProcessorMbeanName = "jboss.web:type=GlobalRequestProcessor,name=http-*";
    String serverMbeanName = "jboss.system:type=Server";

    jmxFeed = JmxFeed.builder().entity(this).period(500, TimeUnit.MILLISECONDS)
            .pollAttribute(new JmxAttributePollConfig<Integer>(ERROR_COUNT)
                    .objectName(requestProcessorMbeanName).attributeName("errorCount"))
            .pollAttribute(new JmxAttributePollConfig<Integer>(REQUEST_COUNT)
                    .objectName(requestProcessorMbeanName).attributeName("requestCount"))
            .pollAttribute(new JmxAttributePollConfig<Integer>(TOTAL_PROCESSING_TIME)
                    .objectName(requestProcessorMbeanName).attributeName("processingTime"))
            .pollAttribute(new JmxAttributePollConfig<Boolean>(SERVICE_UP).objectName(serverMbeanName)
                    .attributeName("Started").onException(Functions.constant(false)))
            .build();/*from   www  .j  a v  a2  s  .  c  o m*/
}

---

From source file:org.caleydo.view.heatmap.v2.internal.SingleHeatMapElementFactory.java

@SuppressWarnings("unchecked")
@Override/*from  www.j a v  a2s.  co  m*/
public GLElement create(GLElementFactoryContext context) {
    EDetailLevel detailLevel = context.get(EDetailLevel.class, EDetailLevel.LOW);

    IHeatMapDataProvider data;
    EDimension dim;
    Function<? super Integer, Color> id2color;

    if (hasTablePerspective(context)) {
        final TablePerspectiveDataProvider d = new TablePerspectiveDataProvider(context.getData());
        data = d;
        dim = EDimension.get(context.getData().getNrRecords() == 1);
        final Integer id = d.getData(dim.opposite()).get(0);
        BasicBlockColorer c = new BasicBlockColorer(d.getDataDomain());
        if (dim.isDimension()) {
            id2color = Functions2.partial(c, id);
        } else {
            id2color = Functions2.partial2(c, id);
        }
    } else {
        dim = context.get(EDimension.class, EDimension.RECORD);
        IDType idType = context.get(IDType.class, null);
        List<Integer> list = context.get(List.class, null);
        DimensionData d = new DimensionData(list, Functions.constant("UnNamed"), Collections.<Group>emptyList(),
                idType);
        //define data
        data = new ListDataProvider(dim.select(null, d), dim.select(d, null), toId2label(context, dim));
        id2color = context.get("id2color", Function.class, null);
    }
    SingleHeatMapPlotElement elem = new SingleHeatMapPlotElement(data, detailLevel, dim, id2color);
    setSelectionStrategies(elem, context);
    return elem;
}

---

From source file:org.apache.brooklyn.entity.webapp.jboss.JBoss6ServerImpl.java

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

    String requestProcessorMbeanName = "jboss.web:type=GlobalRequestProcessor,name=http-*";
    String serverMbeanName = "jboss.system:type=Server";
    boolean retrieveUsageMetrics = getConfig(RETRIEVE_USAGE_METRICS);

    if (isJmxEnabled()) {
        jmxFeed = JmxFeed.builder().entity(this).period(500, TimeUnit.MILLISECONDS)
                .pollAttribute(new JmxAttributePollConfig<Boolean>(SERVICE_UP)
                        // TODO instead of setting SERVICE_UP directly, want to use equivalent of 
                        // addEnricher(Enrichers.builder().updatingMap(Attributes.SERVICE_NOT_UP_INDICATORS).key("serverMBean")...
                        // but not supported in feed?
                        .objectName(serverMbeanName).attributeName("Started")
                        .onException(Functions.constant(false)).suppressDuplicates(true))
                .pollAttribute(// ww  w  . jav a2 s  . c o m
                        new JmxAttributePollConfig<Integer>(ERROR_COUNT).objectName(requestProcessorMbeanName)
                                .attributeName("errorCount").enabled(retrieveUsageMetrics))
                .pollAttribute(new JmxAttributePollConfig<Integer>(REQUEST_COUNT)
                        .objectName(requestProcessorMbeanName).attributeName("requestCount")
                        .onFailureOrException(EntityFunctions.attribute(this, REQUEST_COUNT))
                        .enabled(retrieveUsageMetrics))
                .pollAttribute(new JmxAttributePollConfig<Integer>(TOTAL_PROCESSING_TIME)
                        .objectName(requestProcessorMbeanName).attributeName("processingTime")
                        .enabled(retrieveUsageMetrics))
                .build();
    } else {
        // if not using JMX
        log.warn(this + " running without JMX monitoring; limited visibility of service available");
        connectServiceUpIsRunning();
    }
}

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From source file:org.caleydo.view.heatmap.v2.internal.SingleBarElementFactory.java

@SuppressWarnings("unchecked")
@Override// w  w  w. j  av a 2  s  .c  o  m
public GLElement create(GLElementFactoryContext context) {
    EDetailLevel detailLevel = context.get(EDetailLevel.class, EDetailLevel.LOW);

    IHeatMapDataProvider data;
    EDimension dim;
    Function<? super Integer, Double> id2double;
    Function<? super Double, Vec2f> value2bar;
    Function<? super Integer, Color> id2color;

    if (hasTablePerspective(context)) {
        final TablePerspectiveDataProvider d = new TablePerspectiveDataProvider(context.getData());
        data = d;
        dim = EDimension.get(context.getData().getNrRecords() == 1);
        final Integer id = d.getData(dim.opposite()).get(0);
        if (dim.isDimension()) {
            id2double = Functions2.partial(d, id);
        } else {
            id2double = Functions2.partial2(d, id);
        }
    } else {
        dim = context.get(EDimension.class, EDimension.RECORD);
        IDType idType = context.get(IDType.class, null);
        List<Integer> list = context.get(List.class, null);
        DimensionData d = new DimensionData(list, Functions.constant("UnNamed"), Collections.<Group>emptyList(),
                idType);
        //define data
        data = new ListDataProvider(dim.select(null, d), dim.select(d, null),
                SingleHeatMapElementFactory.toId2label(context, dim));
        id2double = context.get("id2double", Function.class, null);
    }
    id2color = context.get("id2color", Function.class,
            Functions.constant(context.get("color", Color.class, Color.BLACK)));
    value2bar = extractValue2Bar(context);
    SingleBarPlotElement elem = new SingleBarPlotElement(data, detailLevel, dim, id2double, value2bar,
            id2color);
    elem.setFrameColor(context.get("frameColor", Color.class, elem.getFrameColor()));
    elem.setOutline(context.get("outline", Color.class, elem.getOutline()));
    setSelectionStrategies(elem, context);
    return elem;
}

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From source file:org.sosy_lab.cpachecker.cpa.invariants.formula.ReplaceVisitor.java

/**
 * Creates a new replace visitor for replacing occurrences of the first given
 * formula by the second given formula in visited formulae.
 *
 * @param pToReplace the formula to be replaced.
 * @param pReplacement the replacement formula.
 *//*from  w  w w .ja va 2s . c  o m*/
public ReplaceVisitor(NumeralFormula<T> pToReplace, NumeralFormula<T> pReplacement) {
    this(pToReplace == null ? Predicates.<NumeralFormula<T>>alwaysFalse()
            : Predicates.<NumeralFormula<T>>equalTo(pToReplace), Functions.constant(pReplacement),
            Predicates.<BooleanFormula<T>>alwaysFalse(), Functions.<BooleanFormula<T>>identity());
}

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

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

    connectServiceUpIsRunning();//from ww  w . ja  v  a  2  s .c om

    // 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";

    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")))
            .poll(new SshPollConfig<Integer>(TOTAL_CONNECTIONS_RECEIVED).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1))
                    .onSuccess(infoFunction("total_connections_received")))
            .poll(new SshPollConfig<Integer>(TOTAL_COMMANDS_PROCESSED).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1))
                    .onSuccess(infoFunction("total_commands_processed")))
            .poll(new SshPollConfig<Integer>(EXPIRED_KEYS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("expired_keys")))
            .poll(new SshPollConfig<Integer>(EVICTED_KEYS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("evicted_keys")))
            .poll(new SshPollConfig<Integer>(KEYSPACE_HITS).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("keyspace_hits")))
            .poll(new SshPollConfig<Integer>(KEYSPACE_MISSES).command(statsCommand)
                    .onFailureOrException(Functions.constant(-1)).onSuccess(infoFunction("keyspace_misses")))
            .build();
}

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