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groupKey

CamelHystrix

String

Used to identify the hystrix command instance being used by the EIP to correlate statistics, circuit-breaker, properties, etc.

threadPoolKey

null

String

Used to define which thread-pool this command should run in. By default this is using the same key as the group key.

cacheKey

null

Expression

Specifies the cache key to use from the given expression.

initializeRequestContext

false

Boolean

When true, Camel will initialize a HystrixRequestContext during producer startup and use it for request scoped caching and request scoped logging.

corePoolSize

10

Integer

This property sets the core thread-pool size. This is the maximum number of HystrixCommands that can execute concurrently.

keepAliveTime

1

Integer

This property sets the keep-alive time, in minutes.

maxQueueSize

-1

Integer

This property sets the maximum queue size of the BlockingQueue implementation.

queueSizeRejectionThreshold

5

Integer

This property sets the queue size rejection threshold — an artificial maximum queue size at which rejections will occur even if maxQueueSize has not been reached.

threadPoolMetricsRollingStatisticalWindowInMilliseconds

10000

Integer

This property sets the duration of the statistical rolling window, in milliseconds. This is how long metrics are kept for the thread pool.

threadPoolMetricsRollingStatisticalWindowBuckets

10

Integer

This property sets the number of buckets the rolling statistical window is divided into.

circuitBreakerEnabled

true

Boolean

This property determines whether a circuit breaker will be used to track health and to short-circuit requests if it trips.

circuitBreakerErrorThresholdPercentage

50

Integer

This property sets the error percentage at or above which the circuit should trip open and start short-circuiting requests to fallback logic.

circuitBreakerForceClosed

false

Boolean

This property, if true, forces the circuit breaker into a closed state in which it will allow requests regardless of the error percentage.

circuitBreakerForceOpen

false

Boolean

This property, if true, forces the circuit breaker into an open (tripped) state in which it will reject all requests.

circuitBreakerRequestVolumeThreshold

20

Integer

This property sets the minimum number of requests in a rolling window that will trip the circuit.

circuitBreakerSleepWindowInMilliseconds

5000

Integer

This property sets the amount of time, after tripping the circuit, to reject requests before allowing attempts again to determine if the circuit should again be closed.

executionIsolationSemaphoreMaxConcurrentRequests

10

Integer

This property sets the maximum number of requests allowed to a HystrixCommand.run() method when you are using ExecutionIsolationStrategy.SEMAPHORE.

If this maximum concurrent limit is hit then subsequent requests will be rejected.

executionIsolationStrategy

THREAD

String

This property indicates which isolation strategy HystrixCommand.run() executes with, one of the following two choices:

• THREAD — it executes on a separate thread and concurrent requests are limited by the number of threads in the thread-pool

• SEMAPHORE — it executes on the calling thread and concurrent requests are limited by the semaphore count

executionIsolationThreadInterruptOnTimeout

true

Boolean

This property indicates whether the HystrixCommand.run() execution should be interrupted when a timeout occurs.

executionTimeoutInMilliseconds

1000

Integer

This property sets the time in milliseconds after which the caller will observe a timeout and walk away from the command execution.

executionTimeoutEnabled

true

Boolean

This property indicates whether the HystrixCommand.run() execution should have a timeout.

fallbackIsolationSemaphoreMaxConcurrentRequests

10

Integer

This property sets the maximum number of requests a HystrixCommand.getFallback() method is allowed to make from the calling thread.

fallbackEnabled

true

Boolean

This property determines whether a call to HystrixCommand.getFallback() will be attempted when failure or rejection occurs.

metricsHealthSnapshotIntervalInMilliseconds

500

Integer

This property sets the time to wait, in milliseconds, between allowing health snapshots to be taken that calculate success and error percentages and affect circuit breaker status.

metricsRollingPercentileBucketSize

100

Integer

This property sets the maximum number of execution times that are kept per bucket. If more executions occur during the time they will wrap around and start over-writing at the beginning of the bucket.

metricsRollingPercentileEnabled

true

Boolean

This property indicates whether execution latencies should be tracked and calculated as percentiles. If they are disabled, all summary statistics (mean, percentiles) are returned as -1.

metricsRollingPercentileWindowInMilliseconds

60000

Integer

This property sets the duration of the rolling window in which execution times are kept to allow for percentile calculations, in milliseconds.

metricsRollingPercentileWindowBuckets

6

Integer

This property sets the number of buckets the rollingPercentile window will be divided into.

metricsRollingStatisticalWindowInMilliseconds

10000

Integer

The following properties are related to capturing metrics from HystrixCommand and HystrixObservableCommand execution.

metricsRollingStatisticalWindowBuckets

10

Integer

This property sets the number of buckets the rolling statistical window is divided into.

requestCacheEnabled

true

Boolean

This property indicates whether HystrixCommand.getCacheKey() should be used with HystrixRequestCache to provide de-duplication functionality via request-scoped caching.

requestLogEnabled

true

Boolean

This property indicates whether HystrixCommand execution and events should be logged to HystrixRequestLog.