Example usage for com.fasterxml.jackson.core JsonGenerator writeObjectFieldStart

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonGenerator writeObjectFieldStart.

Prototype

public final void writeObjectFieldStart(String fieldName) throws IOException, JsonGenerationException 

Source Link

Document

Convenience method for outputting a field entry ("member") (that will contain a JSON Object value), and the START_OBJECT marker.

Usage

From source file:com.neoteric.starter.metrics.report.elastic.ElasticsearchReporter.java

private void checkForIndexTemplate() {
    try {/*from w  ww  .  ja va 2s. co m*/
        HttpURLConnection connection = openConnection("/_template/metrics_template", "HEAD");
        connection.disconnect();
        boolean isTemplateMissing = connection.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND;

        // nothing there, lets create it
        if (isTemplateMissing) {
            LOGGER.debug("No metrics template found in elasticsearch. Adding...");
            HttpURLConnection putTemplateConnection = openConnection("/_template/metrics_template", "PUT");
            JsonGenerator json = new JsonFactory().createGenerator(putTemplateConnection.getOutputStream());
            json.writeStartObject();
            json.writeStringField("template", index + "*");
            json.writeObjectFieldStart("mappings");

            json.writeObjectFieldStart("_default_");
            json.writeObjectFieldStart("_all");
            json.writeBooleanField("enabled", false);
            json.writeEndObject();
            json.writeObjectFieldStart("properties");
            json.writeObjectFieldStart("name");
            json.writeObjectField("type", "string");
            json.writeObjectField("index", "not_analyzed");
            json.writeEndObject();
            json.writeEndObject();
            json.writeEndObject();

            json.writeEndObject();
            json.writeEndObject();
            json.flush();

            putTemplateConnection.disconnect();
            if (putTemplateConnection.getResponseCode() != HttpStatus.OK.value()) {
                LOGGER.error(
                        "Error adding metrics template to elasticsearch: {}/{}"
                                + putTemplateConnection.getResponseCode(),
                        putTemplateConnection.getResponseMessage());
            }
        }
        checkedForIndexTemplate = true;
    } catch (IOException e) {
        LOGGER.error("Error when checking/adding metrics template to elasticsearch", e);
    }
}

---

From source file:org.springframework.cloud.netflix.hystrix.amqp.HystrixStreamTask.java

@Scheduled(fixedRateString = "${hystrix.stream.amqp.gatherRate:500}")
public void gatherMetrics() {
    try {/*from  w  w  w  .j a v a 2  s.  c om*/
        // command metrics
        Collection<HystrixCommandMetrics> instances = HystrixCommandMetrics.getInstances();
        if (!instances.isEmpty()) {
            log.trace("gathering metrics size: " + instances.size());
        }

        ServiceInstance localService = this.discoveryClient.getLocalServiceInstance();

        for (HystrixCommandMetrics commandMetrics : instances) {
            HystrixCommandKey key = commandMetrics.getCommandKey();
            HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);

            StringWriter jsonString = new StringWriter();
            JsonGenerator json = this.jsonFactory.createGenerator(jsonString);

            json.writeStartObject();

            addServiceData(json, localService);
            json.writeObjectFieldStart("data");
            json.writeStringField("type", "HystrixCommand");
            String name = key.name();

            if (this.properties.isPrefixMetricName()) {
                name = localService.getServiceId() + "." + name;
            }

            json.writeStringField("name", name);
            json.writeStringField("group", commandMetrics.getCommandGroup().name());
            json.writeNumberField("currentTime", System.currentTimeMillis());

            // circuit breaker
            if (circuitBreaker == null) {
                // circuit breaker is disabled and thus never open
                json.writeBooleanField("isCircuitBreakerOpen", false);
            } else {
                json.writeBooleanField("isCircuitBreakerOpen", circuitBreaker.isOpen());
            }
            HystrixCommandMetrics.HealthCounts healthCounts = commandMetrics.getHealthCounts();
            json.writeNumberField("errorPercentage", healthCounts.getErrorPercentage());
            json.writeNumberField("errorCount", healthCounts.getErrorCount());
            json.writeNumberField("requestCount", healthCounts.getTotalRequests());

            // rolling counters
            json.writeNumberField("rollingCountCollapsedRequests",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.COLLAPSED));
            json.writeNumberField("rollingCountExceptionsThrown",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.EXCEPTION_THROWN));
            json.writeNumberField("rollingCountFailure",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.FAILURE));
            json.writeNumberField("rollingCountFallbackFailure",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.FALLBACK_FAILURE));
            json.writeNumberField("rollingCountFallbackRejection",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.FALLBACK_REJECTION));
            json.writeNumberField("rollingCountFallbackSuccess",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.FALLBACK_SUCCESS));
            json.writeNumberField("rollingCountResponsesFromCache",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.RESPONSE_FROM_CACHE));
            json.writeNumberField("rollingCountSemaphoreRejected",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.SEMAPHORE_REJECTED));
            json.writeNumberField("rollingCountShortCircuited",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.SHORT_CIRCUITED));
            json.writeNumberField("rollingCountSuccess",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.SUCCESS));
            json.writeNumberField("rollingCountThreadPoolRejected",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.THREAD_POOL_REJECTED));
            json.writeNumberField("rollingCountTimeout",
                    commandMetrics.getRollingCount(HystrixRollingNumberEvent.TIMEOUT));

            json.writeNumberField("currentConcurrentExecutionCount",
                    commandMetrics.getCurrentConcurrentExecutionCount());

            // latency percentiles
            json.writeNumberField("latencyExecute_mean", commandMetrics.getExecutionTimeMean());
            json.writeObjectFieldStart("latencyExecute");
            json.writeNumberField("0", commandMetrics.getExecutionTimePercentile(0));
            json.writeNumberField("25", commandMetrics.getExecutionTimePercentile(25));
            json.writeNumberField("50", commandMetrics.getExecutionTimePercentile(50));
            json.writeNumberField("75", commandMetrics.getExecutionTimePercentile(75));
            json.writeNumberField("90", commandMetrics.getExecutionTimePercentile(90));
            json.writeNumberField("95", commandMetrics.getExecutionTimePercentile(95));
            json.writeNumberField("99", commandMetrics.getExecutionTimePercentile(99));
            json.writeNumberField("99.5", commandMetrics.getExecutionTimePercentile(99.5));
            json.writeNumberField("100", commandMetrics.getExecutionTimePercentile(100));
            json.writeEndObject();
            //
            json.writeNumberField("latencyTotal_mean", commandMetrics.getTotalTimeMean());
            json.writeObjectFieldStart("latencyTotal");
            json.writeNumberField("0", commandMetrics.getTotalTimePercentile(0));
            json.writeNumberField("25", commandMetrics.getTotalTimePercentile(25));
            json.writeNumberField("50", commandMetrics.getTotalTimePercentile(50));
            json.writeNumberField("75", commandMetrics.getTotalTimePercentile(75));
            json.writeNumberField("90", commandMetrics.getTotalTimePercentile(90));
            json.writeNumberField("95", commandMetrics.getTotalTimePercentile(95));
            json.writeNumberField("99", commandMetrics.getTotalTimePercentile(99));
            json.writeNumberField("99.5", commandMetrics.getTotalTimePercentile(99.5));
            json.writeNumberField("100", commandMetrics.getTotalTimePercentile(100));
            json.writeEndObject();

            // property values for reporting what is actually seen by the command
            // rather than what was set somewhere
            HystrixCommandProperties commandProperties = commandMetrics.getProperties();

            json.writeNumberField("propertyValue_circuitBreakerRequestVolumeThreshold",
                    commandProperties.circuitBreakerRequestVolumeThreshold().get());
            json.writeNumberField("propertyValue_circuitBreakerSleepWindowInMilliseconds",
                    commandProperties.circuitBreakerSleepWindowInMilliseconds().get());
            json.writeNumberField("propertyValue_circuitBreakerErrorThresholdPercentage",
                    commandProperties.circuitBreakerErrorThresholdPercentage().get());
            json.writeBooleanField("propertyValue_circuitBreakerForceOpen",
                    commandProperties.circuitBreakerForceOpen().get());
            json.writeBooleanField("propertyValue_circuitBreakerForceClosed",
                    commandProperties.circuitBreakerForceClosed().get());
            json.writeBooleanField("propertyValue_circuitBreakerEnabled",
                    commandProperties.circuitBreakerEnabled().get());

            json.writeStringField("propertyValue_executionIsolationStrategy",
                    commandProperties.executionIsolationStrategy().get().name());
            json.writeNumberField("propertyValue_executionIsolationThreadTimeoutInMilliseconds",
                    commandProperties.executionIsolationThreadTimeoutInMilliseconds().get());
            json.writeBooleanField("propertyValue_executionIsolationThreadInterruptOnTimeout",
                    commandProperties.executionIsolationThreadInterruptOnTimeout().get());
            json.writeStringField("propertyValue_executionIsolationThreadPoolKeyOverride",
                    commandProperties.executionIsolationThreadPoolKeyOverride().get());
            json.writeNumberField("propertyValue_executionIsolationSemaphoreMaxConcurrentRequests",
                    commandProperties.executionIsolationSemaphoreMaxConcurrentRequests().get());
            json.writeNumberField("propertyValue_fallbackIsolationSemaphoreMaxConcurrentRequests",
                    commandProperties.fallbackIsolationSemaphoreMaxConcurrentRequests().get());

            // TODO
            /*
             * The following are commented out as these rarely change and are verbose
             * for streaming for something people don't change. We could perhaps allow
             * a property or request argument to include these.
             */

            // json.put("propertyValue_metricsRollingPercentileEnabled",
            // commandProperties.metricsRollingPercentileEnabled().get());
            // json.put("propertyValue_metricsRollingPercentileBucketSize",
            // commandProperties.metricsRollingPercentileBucketSize().get());
            // json.put("propertyValue_metricsRollingPercentileWindow",
            // commandProperties.metricsRollingPercentileWindowInMilliseconds().get());
            // json.put("propertyValue_metricsRollingPercentileWindowBuckets",
            // commandProperties.metricsRollingPercentileWindowBuckets().get());
            // json.put("propertyValue_metricsRollingStatisticalWindowBuckets",
            // commandProperties.metricsRollingStatisticalWindowBuckets().get());
            json.writeNumberField("propertyValue_metricsRollingStatisticalWindowInMilliseconds",
                    commandProperties.metricsRollingStatisticalWindowInMilliseconds().get());

            json.writeBooleanField("propertyValue_requestCacheEnabled",
                    commandProperties.requestCacheEnabled().get());
            json.writeBooleanField("propertyValue_requestLogEnabled",
                    commandProperties.requestLogEnabled().get());

            json.writeNumberField("reportingHosts", 1); // this will get summed across
            // all instances in a cluster

            json.writeEndObject(); // end data attribute
            json.writeEndObject();
            json.close();

            // output
            this.jsonMetrics.add(jsonString.getBuffer().toString());
        }

        // thread pool metrics
        for (HystrixThreadPoolMetrics threadPoolMetrics : HystrixThreadPoolMetrics.getInstances()) {
            HystrixThreadPoolKey key = threadPoolMetrics.getThreadPoolKey();

            StringWriter jsonString = new StringWriter();
            JsonGenerator json = this.jsonFactory.createGenerator(jsonString);
            json.writeStartObject();

            addServiceData(json, localService);
            json.writeObjectFieldStart("data");

            json.writeStringField("type", "HystrixThreadPool");
            json.writeStringField("name", key.name());
            json.writeNumberField("currentTime", System.currentTimeMillis());

            json.writeNumberField("currentActiveCount", threadPoolMetrics.getCurrentActiveCount().intValue());
            json.writeNumberField("currentCompletedTaskCount",
                    threadPoolMetrics.getCurrentCompletedTaskCount().longValue());
            json.writeNumberField("currentCorePoolSize", threadPoolMetrics.getCurrentCorePoolSize().intValue());
            json.writeNumberField("currentLargestPoolSize",
                    threadPoolMetrics.getCurrentLargestPoolSize().intValue());
            json.writeNumberField("currentMaximumPoolSize",
                    threadPoolMetrics.getCurrentMaximumPoolSize().intValue());
            json.writeNumberField("currentPoolSize", threadPoolMetrics.getCurrentPoolSize().intValue());
            json.writeNumberField("currentQueueSize", threadPoolMetrics.getCurrentQueueSize().intValue());
            json.writeNumberField("currentTaskCount", threadPoolMetrics.getCurrentTaskCount().longValue());
            json.writeNumberField("rollingCountThreadsExecuted",
                    threadPoolMetrics.getRollingCountThreadsExecuted());
            json.writeNumberField("rollingMaxActiveThreads", threadPoolMetrics.getRollingMaxActiveThreads());

            json.writeNumberField("propertyValue_queueSizeRejectionThreshold",
                    threadPoolMetrics.getProperties().queueSizeRejectionThreshold().get());
            json.writeNumberField("propertyValue_metricsRollingStatisticalWindowInMilliseconds",
                    threadPoolMetrics.getProperties().metricsRollingStatisticalWindowInMilliseconds().get());

            json.writeNumberField("reportingHosts", 1); // this will get summed across
            // all instances in a cluster

            json.writeEndObject(); // end of data object
            json.writeEndObject();
            json.close();
            // output to stream
            this.jsonMetrics.add(jsonString.getBuffer().toString());
        }
    } catch (Exception ex) {
        log.error("Error adding metrics to queue", ex);
    }
}

---

From source file:org.lambdamatic.internal.elasticsearch.codec.BooleanQuerySerializer.java

@Override
public void serialize(final BooleanQuery booleanQuery, final JsonGenerator generator,
        final SerializerProvider serializers) throws IOException, JsonProcessingException {
    // if the booleanQuery does not contain other boolean queries in its elements, just write the
    // elements as an array
    if (!containsBooleanQueries(booleanQuery)) {
        generator.writeStartArray();/* ww  w. j  a  va2s  .  c om*/
        for (Query query : booleanQuery.getQueries()) {
            generator.writeObject(query);
        }
        generator.writeEndArray();
    } else {
        // otherwise...
        generator.writeStartObject();
        generator.writeObjectFieldStart("bool");
        switch (booleanQuery.getType()) {
        case AND:
            // TODO: also support 'must_not' if the query is inverted.
            generator.writeArrayFieldStart("must");
            for (Query query : booleanQuery.getQueries()) {
                generator.writeObject(query);
            }
            generator.writeEndArray(); // end of 'must'
            break;
        case OR:
            generator.writeArrayFieldStart("should");
            for (Query query : booleanQuery.getQueries()) {
                generator.writeObject(query);
            }
            generator.writeEndArray();// end of 'should'
            break;
        default:
            throw new CodecException("Unexpected boolean type:" + booleanQuery.getType());
        }
        generator.writeEndObject(); // end of 'bool'
        generator.writeEndObject(); // end of root
    }
}

---

From source file:org.n52.tamis.core.json.serialize.processes.execute.ExecuteInputSerializer.java

private void writeAsData(JsonGenerator jsonGenerator, ExecuteInput input) throws IOException {
    /*// ww  w  .  java 2 s  .co  m
     * write the input as WPS "Data" element
     * 
     * expected structure looks like:
     * 
     * { "Data": { "_mimeType": "text/xml", "_schema":
     * "http://schemas.opengis.net/gml/3.2.1/base/feature.xsd",
     * "__text": "value" }, 
     * "_id": "target-variable-point" 
     * }
     * 
     * 
     */
    logger.info("Input \"{}\" is serialized as WPS \"Data\".", input);

    jsonGenerator.writeStartObject();

    jsonGenerator.writeObjectFieldStart("Data");

    jsonGenerator.writeStringField("_text", input.getValue());

    /*
     * TODO parameters "_mimeType" and "_schema"?
     */
    // jsonGenerator.writeStringField("_mimeType", "application/om+xml;
    // version=2.0");
    // jsonGenerator.writeStringField("_schema",
    // "http://schemas.opengis.net/om/2.0/observation.xsd");

    jsonGenerator.writeEndObject();

    jsonGenerator.writeStringField("_id", input.getId());

    jsonGenerator.writeEndObject();
}

---

From source file:de.escalon.hypermedia.spring.hydra.LinkListSerializer.java

private void writeIriTemplate(String rel, String href, List<String> variableNames,
        ActionDescriptor actionDescriptorForHttpGet, JsonGenerator jgen) throws IOException {
    jgen.writeObjectFieldStart(rel);/*from w  w w .  j  a va  2s .c om*/

    jgen.writeStringField("@type", "hydra:IriTemplate");
    jgen.writeStringField("hydra:template", href);
    jgen.writeArrayFieldStart("hydra:mapping");
    writeHydraVariableMapping(jgen, actionDescriptorForHttpGet, variableNames);
    jgen.writeEndArray();

    jgen.writeEndObject();
}

---

From source file:org.elasticsearch.metrics.ElasticsearchReporter.java

/**
 * This index template is automatically applied to all indices which start with the index name
 * The index template simply configures the name not to be analyzed
 */// ww w . j  a v a 2 s.  co  m
private void checkForIndexTemplate() {
    try {
        HttpURLConnection connection = openConnection("/_template/metrics_template", "HEAD");
        if (connection == null) {
            LOGGER.error("Could not connect to any configured elasticsearch instances: {}",
                    Arrays.asList(hosts));
            return;
        }
        connection.disconnect();

        boolean isTemplateMissing = connection.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND;

        // nothing there, lets create it
        if (isTemplateMissing) {
            LOGGER.debug("No metrics template found in elasticsearch. Adding...");
            HttpURLConnection putTemplateConnection = openConnection("/_template/metrics_template", "PUT");
            if (putTemplateConnection == null) {
                LOGGER.error("Error adding metrics template to elasticsearch");
                return;
            }

            JsonGenerator json = new JsonFactory().createGenerator(putTemplateConnection.getOutputStream());
            json.writeStartObject();
            json.writeStringField("template", index + "*");
            json.writeObjectFieldStart("mappings");

            json.writeObjectFieldStart("_default_");
            json.writeObjectFieldStart("_all");
            json.writeBooleanField("enabled", false);
            json.writeEndObject();
            json.writeObjectFieldStart("properties");
            json.writeObjectFieldStart("name");
            json.writeObjectField("type", "string");
            json.writeObjectField("index", "not_analyzed");
            json.writeEndObject();
            json.writeEndObject();
            json.writeEndObject();

            json.writeEndObject();
            json.writeEndObject();
            json.flush();

            putTemplateConnection.disconnect();
            if (putTemplateConnection.getResponseCode() != 200) {
                LOGGER.error(
                        "Error adding metrics template to elasticsearch: {}/{}"
                                + putTemplateConnection.getResponseCode(),
                        putTemplateConnection.getResponseMessage());
            }
        }
        checkedForIndexTemplate = true;
    } catch (IOException e) {
        LOGGER.error("Error when checking/adding metrics template to elasticsearch", e);
    }
}

---

From source file:com.oneops.metrics.es.ElasticsearchReporter.java

/**
 * This index template is automatically applied to all indices which start with the index name
 * The index template simply configures the name not to be analyzed
 *//*from   w  ww. j  av  a 2  s  .  c  o m*/
private void checkForIndexTemplate() {
    try {
        HttpURLConnection connection = openConnection("/_template/metrics_template", "HEAD");
        if (connection == null) {
            LOGGER.error("Could not connect to any configured elasticsearch instances: {}",
                    Arrays.asList(hosts));
            return;
        }
        connection.disconnect();

        boolean isTemplateMissing = connection.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND;

        // nothing there, lets create it
        if (isTemplateMissing) {
            LOGGER.debug("No metrics template found in elasticsearch. Adding...");
            HttpURLConnection putTemplateConnection = openConnection("/_template/metrics_template", "PUT");
            JsonGenerator json = new JsonFactory().createGenerator(putTemplateConnection.getOutputStream());
            json.writeStartObject();
            json.writeStringField("template", index + "*");
            json.writeObjectFieldStart("mappings");

            json.writeObjectFieldStart("_default_");
            json.writeObjectFieldStart("_all");
            json.writeBooleanField("enabled", false);
            json.writeEndObject();
            json.writeObjectFieldStart("properties");
            json.writeObjectFieldStart("name");
            json.writeObjectField("type", "string");
            json.writeObjectField("index", "not_analyzed");
            json.writeEndObject();
            json.writeEndObject();
            json.writeEndObject();

            json.writeEndObject();
            json.writeEndObject();
            json.flush();

            putTemplateConnection.disconnect();
            if (putTemplateConnection.getResponseCode() != 200) {
                LOGGER.error(
                        "Error adding metrics template to elasticsearch: {}/{}"
                                + putTemplateConnection.getResponseCode(),
                        putTemplateConnection.getResponseMessage());
            }
        }
        checkedForIndexTemplate = true;
    } catch (IOException e) {
        LOGGER.error("Error when checking/adding metrics template to elasticsearch", e);
    }
}

---

From source file:de.escalon.hypermedia.spring.hydra.LinkListSerializer.java

private void writeCollectionHolder(String fieldName, TypedResource collectionHolder, JsonGenerator jgen)
        throws IOException {
    jgen.writeObjectFieldStart(fieldName);
    String identifyingUri = collectionHolder.getIdentifyingUri();
    if (identifyingUri != null) {
        jgen.writeStringField(JsonLdKeywords.AT_ID, identifyingUri);
    }/*from  ww w.  j  ava  2  s.  c  om*/
    jgen.writeStringField(JsonLdKeywords.AT_TYPE, collectionHolder.getSemanticType());
    jgen.writeEndObject();
}

---

From source file:com.netflix.hystrix.serial.SerialHystrixDashboardData.java

private static void writeCollapserMetrics(final HystrixCollapserMetrics collapserMetrics, JsonGenerator json)
        throws IOException {
    HystrixCollapserKey key = collapserMetrics.getCollapserKey();

    json.writeStartObject();//w  w w  .  ja  va  2  s . c  o m

    json.writeStringField("type", "HystrixCollapser");
    json.writeStringField("name", key.name());
    json.writeNumberField("currentTime", System.currentTimeMillis());

    safelyWriteNumberField(json, "rollingCountRequestsBatched", new Func0<Long>() {
        @Override
        public Long call() {
            return collapserMetrics.getRollingCount(HystrixEventType.Collapser.ADDED_TO_BATCH);
        }
    });
    safelyWriteNumberField(json, "rollingCountBatches", new Func0<Long>() {
        @Override
        public Long call() {
            return collapserMetrics.getRollingCount(HystrixEventType.Collapser.BATCH_EXECUTED);
        }
    });
    safelyWriteNumberField(json, "rollingCountResponsesFromCache", new Func0<Long>() {
        @Override
        public Long call() {
            return collapserMetrics.getRollingCount(HystrixEventType.Collapser.RESPONSE_FROM_CACHE);
        }
    });

    // batch size percentiles
    json.writeNumberField("batchSize_mean", collapserMetrics.getBatchSizeMean());
    json.writeObjectFieldStart("batchSize");
    json.writeNumberField("25", collapserMetrics.getBatchSizePercentile(25));
    json.writeNumberField("50", collapserMetrics.getBatchSizePercentile(50));
    json.writeNumberField("75", collapserMetrics.getBatchSizePercentile(75));
    json.writeNumberField("90", collapserMetrics.getBatchSizePercentile(90));
    json.writeNumberField("95", collapserMetrics.getBatchSizePercentile(95));
    json.writeNumberField("99", collapserMetrics.getBatchSizePercentile(99));
    json.writeNumberField("99.5", collapserMetrics.getBatchSizePercentile(99.5));
    json.writeNumberField("100", collapserMetrics.getBatchSizePercentile(100));
    json.writeEndObject();

    // shard size percentiles (commented-out for now)
    //json.writeNumberField("shardSize_mean", collapserMetrics.getShardSizeMean());
    //json.writeObjectFieldStart("shardSize");
    //json.writeNumberField("25", collapserMetrics.getShardSizePercentile(25));
    //json.writeNumberField("50", collapserMetrics.getShardSizePercentile(50));
    //json.writeNumberField("75", collapserMetrics.getShardSizePercentile(75));
    //json.writeNumberField("90", collapserMetrics.getShardSizePercentile(90));
    //json.writeNumberField("95", collapserMetrics.getShardSizePercentile(95));
    //json.writeNumberField("99", collapserMetrics.getShardSizePercentile(99));
    //json.writeNumberField("99.5", collapserMetrics.getShardSizePercentile(99.5));
    //json.writeNumberField("100", collapserMetrics.getShardSizePercentile(100));
    //json.writeEndObject();

    //json.writeNumberField("propertyValue_metricsRollingStatisticalWindowInMilliseconds", collapserMetrics.getProperties().metricsRollingStatisticalWindowInMilliseconds().get());
    json.writeBooleanField("propertyValue_requestCacheEnabled",
            collapserMetrics.getProperties().requestCacheEnabled().get());
    json.writeNumberField("propertyValue_maxRequestsInBatch",
            collapserMetrics.getProperties().maxRequestsInBatch().get());
    json.writeNumberField("propertyValue_timerDelayInMilliseconds",
            collapserMetrics.getProperties().timerDelayInMilliseconds().get());

    json.writeNumberField("reportingHosts", 1); // this will get summed across all instances in a cluster

    json.writeEndObject();
}

---

From source file:org.n52.ar.layar.LayarResponse.java

/**
 * /* w w w  .  ja v  a 2s .c o  m*/
 * "hotspots": [{
 * 
 * "id": "test_1",
 * 
 * "anchor": { "geolocation": { "lat": 52.3729, "lon": 4.93 } },
 * 
 * "text": { "title": "The Layar Office", "description": "The Location of the Layar Office", "footnote":
 * "Powered by Layar" },
 * 
 * "imageURL": "http:\/\/custom.layar.nl\/layarimage.jpeg", }
 * 
 * ]
 * 
 * See http://layar.com/documentation/browser/api/getpois-response/hotspots/
 * 
 * @param generator
 * @param hotspots2
 * @throws IOException
 * @throws JsonGenerationException
 */
private void createHotspots(JsonGenerator generator) throws JsonGenerationException, IOException {
    generator.writeFieldName("hotspots");
    generator.writeStartArray();
    for (Hotspot poi : this.hotspots) {

        generator.writeStartObject();
        generator.writeStringField("id", poi.id);

        // generator.writeFieldName("actions");
        // generator.writeStartArray();
        // if (layarPOI.actions != null) {
        // for (final LayarAction layarAction : layarPOI.actions) {
        // layarAction.toJSON(generator);
        // }
        // }
        // generator.writeEndArray();

        generator.writeObjectFieldStart("anchor");
        generator.writeObjectFieldStart("geolocation");
        generator.writeNumberField("lat", poi.lat);
        generator.writeNumberField("lon", poi.lon);
        generator.writeNumberField("alt", poi.alt);
        generator.writeEndObject();
        generator.writeEndObject();

        // generator.writeNumberField("distance", layarPOI.distance);
        // generator.writeNumberField("type", layarPOI.type);
        // generator.writeStringField("title", layarPOI.title);
        generator.writeObjectFieldStart("text");
        generator.writeStringField("title", poi.title);
        generator.writeStringField("description", poi.description);
        generator.writeStringField("footnote", "Service URL: ...");
        generator.writeEndObject();

        generator.writeStringField("attribution", poi.attribution);
        if (poi.imageURL != null) {
            generator.writeStringField("imageURL", poi.imageURL.toString());
        } else {
            generator.writeNullField("imageURL");
        }
        generator.writeEndObject();
    }
    generator.writeEndArray();

}

---

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