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:io.cloudsoft.marklogic.nodes.MarkLogicNodeImpl.java

/**
 * Sets up the polling of sensors./*from  w  ww  . j av  a 2s  .c o  m*/
 */
@Override
protected void connectSensors() {
    super.connectSensors();
    serviceUp = FunctionFeed.builder().entity(this).period(5000)
            .poll(new FunctionPollConfig<Boolean, Boolean>(SERVICE_UP)
                    .onException(Functions.constant(Boolean.FALSE)).callable(new Callable<Boolean>() {
                        public Boolean call() {
                            return getDriver().isRunning();
                        }
                    }))
            .build();
}

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From source file:brooklyn.event.basic.DependentConfiguration.java

public static <T> Task<T> valueWhenAttributeReady(Entity source, AttributeSensor<T> sensor, T value) {
    return DependentConfiguration.<T, T>attributePostProcessedWhenReady(source, sensor,
            GroovyJavaMethods.truthPredicate(), Functions.constant(value));
}

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From source file:org.terasology.rendering.nui.layers.mainMenu.settings.PlayerSettingsScreen.java

@Override
public void initialise() {
    setAnimationSystem(MenuAnimationSystems.createDefaultSwipeAnimation());

    storageServiceStatus = find("storageServiceStatus", UILabel.class);
    storageServiceAction = find("storageServiceAction", UIButton.class);
    updateStorageServiceStatus();//  w ww. j a v  a2  s. co  m

    nametext = find("playername", UIText.class);
    if (nametext != null) {
        nametext.setTooltipDelay(0);
        nametext.bindTooltipString(new ReadOnlyBinding<String>() {
            @Override
            public String get() {
                return validateScreen();
            }
        });
    }
    img = find("image", UIImage.class);
    if (img != null) {
        ResourceUrn uri = TextureUtil.getTextureUriForColor(Color.WHITE);
        Texture tex = Assets.get(uri, Texture.class).get();
        img.setImage(tex);
    }

    slider = find("tone", UISlider.class);
    if (slider != null) {
        slider.setIncrement(0.01f);
        Function<Object, String> constant = Functions.constant("  "); // ensure a certain width
        slider.setLabelFunction(constant);
    }

    heightSlider = find("height", UISlider.class);
    if (heightSlider != null) {
        heightSlider.setMinimum(1.5f);
        heightSlider.setIncrement(0.1f);
        heightSlider.setRange(0.5f);
        heightSlider.setPrecision(1);
    }

    eyeHeightSlider = find("eye-height", UISlider.class);
    if (eyeHeightSlider != null) {
        eyeHeightSlider.setMinimum(0.5f);
        eyeHeightSlider.setIncrement(0.1f);
        eyeHeightSlider.setRange(1f);
        eyeHeightSlider.setPrecision(1);
    }

    language = find("language", UIDropdownScrollable.class);
    if (language != null) {
        SimpleUri menuUri = new SimpleUri("engine:menu");
        TranslationProject menuProject = translationSystem.getProject(menuUri);
        List<Locale> locales = new ArrayList<>(menuProject.getAvailableLocales());
        for (Locale languageExcluded : languagesExcluded) {
            locales.remove(languageExcluded);
        }
        Collections.sort(locales, ((Object o1, Object o2) -> (o1.toString().compareTo(o2.toString()))));
        language.setOptions(Lists.newArrayList(locales));
        language.setVisibleOptions(5); // Set maximum number of options visible for scrolling
        language.setOptionRenderer(new LocaleRenderer(translationSystem));
    }

    WidgetUtil.trySubscribe(this, "close", button -> triggerBackAnimation());

    WidgetUtil.trySubscribe(this, "storageServiceAction", widget -> {
        if (storageService.getStatus() == StorageServiceWorkerStatus.LOGGED_IN) {
            ThreeButtonPopup logoutPopup = getManager().pushScreen(ThreeButtonPopup.ASSET_URI,
                    ThreeButtonPopup.class);
            logoutPopup.setMessage(translationSystem.translate("${engine:menu#storage-service-log-out}"),
                    translationSystem.translate("${engine:menu#storage-service-log-out-popup}"));
            logoutPopup.setLeftButton(translationSystem.translate("${engine:menu#dialog-yes}"),
                    () -> storageService.logout(true));
            logoutPopup.setCenterButton(translationSystem.translate("${engine:menu#dialog-no}"),
                    () -> storageService.logout(false));
            logoutPopup.setRightButton(translationSystem.translate("${engine:menu#dialog-cancel}"), () -> {
            });
        } else if (storageService.getStatus() == StorageServiceWorkerStatus.LOGGED_OUT) {
            getManager().pushScreen(StorageServiceLoginPopup.ASSET_URI, StorageServiceLoginPopup.class);
        }
    });

    UIButton okButton = find("ok", UIButton.class);
    if (okButton != null) {
        okButton.subscribe(button -> {
            savePlayerSettings();
            triggerBackAnimation();
        });
        okButton.bindEnabled(new ReadOnlyBinding<Boolean>() {
            @Override
            public Boolean get() {
                return Strings.isNullOrEmpty(validateScreen());
            }
        });
        okButton.setTooltipDelay(0);
        okButton.bindTooltipString(new ReadOnlyBinding<String>() {
            @Override
            public String get() {
                return validateScreen();
            }
        });
    }
}

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From source file:brooklyn.event.feed.FeedConfig.java

public F setOnException(T val) {
    return onException(Functions.constant(val));
}

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From source file:org.apache.brooklyn.entity.cloudfoundry.webapp.java.JavaCloudFoundryPaasWebAppImpl.java

private void connectServiceRequestPerSecondSensor() {
    requestPerSecondLatencyFeed = FunctionFeed.builder().entity(this).period(Duration.seconds(1))
            .poll(new FunctionPollConfig<Double, Double>(REQUEST_PER_SECOND)
                    .onException(Functions.constant(0.0)).callable(new Callable<Double>() {
                        public Double call() {
                            Double currentRequestPerSecond = getAttribute(SERVER_REQUESTS) - lastTotalRequest;
                            if (currentRequestPerSecond >= 0) {
                                lastTotalRequest = getAttribute(SERVER_REQUESTS);
                                return currentRequestPerSecond;
                            } else {
                                return getAttribute(SERVER_REQUESTS);
                            }//from  w  ww.j  a va  2 s  .  c  o  m
                        }
                    }))
            .build();
}

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From source file:com.palantir.atlasdb.keyvalue.impl.Cells.java

public static <K, V> Map<K, V> constantValueMap(Set<K> keys, V v) {
    return Maps.asMap(keys, Functions.constant(v));
}

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From source file:org.apache.brooklyn.util.repeat.Repeater.java

/**
 * Set how long to wait between loop iterations, as a constant function in {@link #delayOnIteration}
 *///from  w  ww.  jav a2 s . c o  m
public Repeater every(Duration duration) {
    Preconditions.checkNotNull(duration, "duration must not be null");
    Preconditions.checkArgument(duration.toMilliseconds() > 0, "period must be positive: %s", duration);
    return delayOnIteration(Functions.constant(duration));
}

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From source file:org.apache.brooklyn.core.feed.FeedConfig.java

/** @see #onResult(Function) */
public F setOnResult(T val) {
    return onResult(Functions.constant(val));
}

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From source file:io.brooklyn.ambari.server.AmbariServerImpl.java

@Override
protected void connectSensors() {
    super.connectSensors();
    connectServiceUpIsRunning();// w w w. jav a 2s.c  o m

    HostAndPort hp = BrooklynAccessUtils.getBrooklynAccessibleAddress(this, getAttribute(HTTP_PORT));

    ambariUri = String.format("http://%s:%d", hp.getHostText(), hp.getPort());

    setAttribute(Attributes.MAIN_URI, URI.create(ambariUri));

    sensors().set(AmbariServer.USERNAME, USERNAME);
    usernamePasswordCredentials = new UsernamePasswordCredentials(USERNAME,
            getAttribute(AmbariServer.PASSWORD) == null ? INITIAL_PASSWORD
                    : getAttribute(AmbariServer.PASSWORD));

    restAdapter = new RestAdapter.Builder().setEndpoint(ambariUri)
            .setRequestInterceptor(new AmbariRequestInterceptor(usernamePasswordCredentials))
            .setLogLevel(RestAdapter.LogLevel.FULL).build();

    serviceUpHttpFeed = HttpFeed.builder().entity(this).period(500, TimeUnit.MILLISECONDS).baseUri(ambariUri)
            .poll(new HttpPollConfig<Boolean>(URL_REACHABLE)
                    .onSuccess(HttpValueFunctions.responseCodeEquals(200))
                    .onFailureOrException(Functions.constant(false)))
            .build();

    enrichers().add(Enrichers.builder().updatingMap(Attributes.SERVICE_NOT_UP_INDICATORS).from(URL_REACHABLE)
            .computing(Functionals.ifNotEquals(true).value("URL not reachable")).build());

    connectAuthenticatedSensors();
}

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From source file:org.apache.brooklyn.core.sensor.windows.WinRmCommandSensor.java

@Override
public void apply(final EntityLocal entity) {
    super.apply(entity);

    if (LOG.isDebugEnabled()) {
        LOG.debug("Adding WinRM sensor {} to {}", name, entity);
    }/*from  w ww.ja v  a  2s. c o  m*/

    final Boolean suppressDuplicates = EntityInitializers.resolve(params, SUPPRESS_DUPLICATES);
    final Duration logWarningGraceTimeOnStartup = EntityInitializers.resolve(params,
            LOG_WARNING_GRACE_TIME_ON_STARTUP);
    final Duration logWarningGraceTime = EntityInitializers.resolve(params, LOG_WARNING_GRACE_TIME);

    Supplier<Map<String, String>> envSupplier = new Supplier<Map<String, String>>() {
        @SuppressWarnings("serial")
        @Override
        public Map<String, String> get() {
            Map<String, String> env = MutableMap.copyOf(entity.getConfig(SENSOR_ENVIRONMENT));

            // Add the shell environment entries from our configuration
            if (sensorEnv != null)
                env.putAll(sensorEnv);

            // Try to resolve the configuration in the env Map
            try {
                env = Tasks.resolveDeepValueExactly(env, new TypeToken<Map<String, String>>() {
                }, ((EntityInternal) entity).getExecutionContext());
            } catch (InterruptedException | ExecutionException e) {
                Exceptions.propagateIfFatal(e);
            }

            // Convert the environment into strings with the serializer
            ShellEnvironmentSerializer serializer = new ShellEnvironmentSerializer(
                    ((EntityInternal) entity).getManagementContext());
            return serializer.serialize(env);
        }
    };

    Supplier<String> commandSupplier = new Supplier<String>() {
        @Override
        public String get() {
            return makeCommandExecutingInDirectory(command, executionDir, entity);
        }
    };

    CommandPollConfig<T> pollConfig = new CommandPollConfig<T>(sensor).period(period).env(envSupplier)
            .command(commandSupplier).suppressDuplicates(Boolean.TRUE.equals(suppressDuplicates))
            .checkSuccess(SshValueFunctions.exitStatusEquals(0))
            .onFailureOrException(Functions.constant((T) null))
            .onSuccess(Functions.compose(new Function<String, T>() {
                @Override
                public T apply(String input) {
                    return TypeCoercions.coerce(Strings.trimEnd(input), (Class<T>) sensor.getType());
                }
            }, SshValueFunctions.stdout())).logWarningGraceTimeOnStartup(logWarningGraceTimeOnStartup)
            .logWarningGraceTime(logWarningGraceTime);

    CmdFeed feed = CmdFeed.builder().entity(entity).onlyIfServiceUp().poll(pollConfig).build();

    entity.addFeed(feed);
}

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