Examples of HystrixCommandKey

Examples of com.netflix.hystrix.HystrixCommandKey

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        @Override
        public void run() {
            try {
                // command metrics
                for (HystrixCommandMetrics commandMetrics : HystrixCommandMetrics.getInstances()) {
                    HystrixCommandKey key = commandMetrics.getCommandKey();
                    HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);

                    StringWriter jsonString = new StringWriter();
                    JsonGenerator json = jsonFactory.createJsonGenerator(jsonString);

                    json.writeStartObject();
                    json.writeStringField("type", "HystrixCommand");
                    json.writeStringField("name", key.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());
                    }
                    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());

                    /*
                     * 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();
                    json.close();

                    // output to handler
                    listener.handleJsonMetric(jsonString.getBuffer().toString());
                }

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

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

                    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());
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Examples of com.netflix.hystrix.HystrixCommandKey

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    private JsonMappers() {
    }

    static String toJson(HystrixCommandMetrics commandMetrics) throws IOException {
        HystrixCommandKey key = commandMetrics.getCommandKey();
        HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);

        StringWriter jsonString = new StringWriter();
        JsonGenerator json = jsonFactory.createJsonGenerator(jsonString);

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

        // circuit breaker
        if (circuitBreaker == null) {
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Examples of com.netflix.hystrix.HystrixCommandKey

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  /**
   * 演示获取Hystrix的Metrics.
   */
  public MetricsMap getHystrixMetrics() {
    MetricsMap metricsMap = new MetricsMap();
    HystrixCommandKey key = HystrixCommandKey.Factory.asKey("GetUserCommand");
    HystrixCommandMetrics metrics = HystrixCommandMetrics.getInstance(key);

    if (metrics != null) {
      HealthCounts counts = metrics.getHealthCounts();
      HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);
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Examples of com.netflix.hystrix.HystrixCommandKey

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        @Override
        public void run() {
            try {
                // command metrics
                for (HystrixCommandMetrics commandMetrics : HystrixCommandMetrics.getInstances()) {
                    HystrixCommandKey key = commandMetrics.getCommandKey();
                    HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);

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

                    json.writeStartObject();
                    json.writeStringField("type", "HystrixCommand");
                    json.writeStringField("name", key.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());
                    }
                    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());

                    /*
                     * 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
                    if (circuitBreaker != null && circuitBreaker.isOpen()) {
                      json.writeStringField("openCircuitHostNames", hostName); // pass the host name from where open circuit is being reported
                    } else {
                      json.writeStringField("openCircuitHostNames",""); // add an empty string
                    }

                    json.writeEndObject();
                    json.close();

                    // output to handler
                    listener.handleJsonMetric(jsonString.getBuffer().toString());
                }

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

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

                    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());
View Full Code Here

Examples of com.netflix.hystrix.HystrixCommandKey

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        // HystrixCommand value is an array of multiple objects; an object for each command
        responseJson.writeArrayFieldStart("HystrixCommand");

        for (HystrixCommandMetrics commandMetrics : HystrixCommandMetrics.getInstances()) {
            responseJson.writeStartObject();
            HystrixCommandKey key = commandMetrics.getCommandKey();

            responseJson.writeStringField("name", key.name());
            responseJson.writeStringField("group", commandMetrics.getCommandGroup().name());

            HystrixCommandMetrics.HealthCounts healthCounts = commandMetrics.getHealthCounts();
            responseJson.writeNumberField("errorCount", healthCounts.getErrorCount());
            responseJson.writeNumberField("requestCount", healthCounts.getTotalRequests());

            responseJson.writeNumberField("rollingCountFailure", commandMetrics.getRollingCount(HystrixRollingNumberEvent.FAILURE));
            responseJson.writeNumberField("rollingCountSemaphoreRejected", commandMetrics.getRollingCount(HystrixRollingNumberEvent.SEMAPHORE_REJECTED));
            responseJson.writeNumberField("rollingCountShortCircuited", commandMetrics.getRollingCount(HystrixRollingNumberEvent.SHORT_CIRCUITED));
            responseJson.writeNumberField("rollingCountSuccess", commandMetrics.getRollingCount(HystrixRollingNumberEvent.SUCCESS));
            responseJson.writeNumberField("rollingCountThreadPoolRejected", commandMetrics.getRollingCount(HystrixRollingNumberEvent.THREAD_POOL_REJECTED));
            responseJson.writeNumberField("rollingCountTimeout", commandMetrics.getRollingCount(HystrixRollingNumberEvent.TIMEOUT));

            responseJson.writeNumberField("latencyTotal_mean", commandMetrics.getTotalTimeMean());
            responseJson.writeObjectFieldStart("latencyTotal");
            responseJson.writeNumberField("0", commandMetrics.getTotalTimePercentile(0));
            responseJson.writeNumberField("25", commandMetrics.getTotalTimePercentile(25));
            responseJson.writeNumberField("50", commandMetrics.getTotalTimePercentile(50));
            responseJson.writeNumberField("75", commandMetrics.getTotalTimePercentile(75));
            responseJson.writeNumberField("90", commandMetrics.getTotalTimePercentile(90));
            responseJson.writeNumberField("95", commandMetrics.getTotalTimePercentile(95));
            responseJson.writeNumberField("99", commandMetrics.getTotalTimePercentile(99));
            responseJson.writeNumberField("99.5", commandMetrics.getTotalTimePercentile(99.5));
            responseJson.writeNumberField("100", commandMetrics.getTotalTimePercentile(100));
            responseJson.writeEndObject();

            responseJson.writeEndObject();
        }
        responseJson.writeEndArray();

        responseJson.writeArrayFieldStart("HystrixThreadPool");
        // thread pool metrics: an array of multiple objects; an object for each method

        for (HystrixThreadPoolMetrics threadPoolMetrics : HystrixThreadPoolMetrics.getInstances()) {
            responseJson.writeStartObject();
            HystrixThreadPoolKey key = threadPoolMetrics.getThreadPoolKey();

            responseJson.writeStringField("name", key.name());

            responseJson.writeNumberField("currentActiveCount", threadPoolMetrics.getCurrentActiveCount().intValue());
            responseJson.writeNumberField("currentQueueSize", threadPoolMetrics.getCurrentQueueSize().intValue());
            responseJson.writeEndObject();
        }
View Full Code Here

Examples of com.netflix.hystrix.HystrixCommandKey

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public class HystrixCommandMetricsJsonMapper implements Function<HystrixCommandMetrics, String> {
  private final JsonFactory jsonFactory = new JsonFactory();

  @Override
  public String apply(HystrixCommandMetrics commandMetrics) throws Exception {
    HystrixCommandKey key = commandMetrics.getCommandKey();
    HystrixCircuitBreaker circuitBreaker = HystrixCircuitBreaker.Factory.getInstance(key);

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

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

    // circuit breaker
    if (circuitBreaker == null) {
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