[[microprofile-metrics]]
= MicroProfile Metrics Extension

*Available as of Camel Quarkus version 0.21*

The MicroProfile Metrics extension produces metrics and statistics related to the Camel Context, routes and message exchanges.

Maven users will need to add the following dependency to their `pom.xml` for this extension.

[source,xml]
------------------------------------------------------------
<dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-microprofile-metrics</artifactId>
</dependency>
------------------------------------------------------------

== Usage

The https://camel.apache.org/components/latest/microprofile-metrics-component.html[microprofile-metrics] component automatically exposes a set of Camel application metrics. Some of these include:

=== Camel Context metrics

[cols="80,.^20]
|===
|Metric Name | Type

|`camel.context.status`

The status of the Camel Context represented by the `ServiceStatus` enum ordinal

| Gauge

|`camel.context.uptime`

The Camel Context uptime in milliseconds

| Gauge

|`camel.context.exchanges.completed.total`

The total number of completed exchanges

| Counter

|`camel.context.exchanges.failed.total`

The total number of failed exchanges

| Counter

|`camel.context.exchanges.inflight.total`

The total number of inflight exchanges

| Gauge

|`camel.context.exchanges.total`

The total number of all exchanges

| Counter

|`camel.context.externalRedeliveries.total`

The total number of all external redeliveries

| Counter

|`camel.context.failuresHandled.total`

The total number of all failures handled

| Counter

|===

=== Camel Route metrics

[cols="80,.^20]
|===
|Metric Name | Type

|`camel.route.count`

The number of routes

| Gauge

|`camel.route.running.count`

The number of running routes

| Gauge

|`camel.route.exchanges.completed.total`

The total number of completed exchanges for the route

| Counter

|`camel.route.exchanges.failed.total`

The total number of failed exchanges for the route

| Counter

|`camel.route.exchanges.inflight.total`

The total number of inflight exchanges for the route

| Gauge

|`camel.route.exchanges.total`

The total number of all exchanges for the route

| Counter

|`camel.route.externalRedeliveries.total`

The total number of all external redeliveries for the route

| Counter

|`camel.route.failuresHandled.total`

The total number of all failures handled for the route

| Counter
|===

All metrics are tagged with the name of the Camel Context and the id of the route where applicable.

You can also produce your own customized metrics in your Camel routes. For more information, refer to the https://camel.apache.org/components/latest/microprofile-metrics-component.html[microprofile-metrics] component documentation.

Metrics are exposed to Quarkus as application metrics and they can be browsed at http://localhost:8080/metrics/application.


=== Configuration

The Camel MicroProfile Metrics extension exposes the following configuration properties.

[cols="80,.^10,.^10"]
|===
|Configuration property |Type |Default

|`quarkus.camel.metrics.enable-route-policy`

Set whether to enable the `MicroProfileMetricsRoutePolicyFactory` for capturing metrics on route processing times
|boolean
|`true`


|`quarkus.camel.metrics.enable-message-history`

Set whether to enable the `MicroProfileMetricsMessageHistoryFactory` for capturing metrics on individual route node processing times.

Depending on the number of configured route nodes, there is the potential to create a large volume of metrics. Therefore, this option is disabled by default.

|boolean
|`false`

|`quarkus.camel.metrics.enable-exchange-event-notifier`

Set whether to enable the `MicroProfileMetricsExchangeEventNotifier` for capturing metrics on exchange processing times.

|boolean
|`true`

|`quarkus.camel.metrics.enable-route-event-notifier`

Set whether to enable the `MicroProfileMetricsRouteEventNotifier` for capturing metrics on the total number of routes and total number of routes running.

|boolean
|`true`

|`quarkus.camel.metrics.enable-camel-context-event-notifier`

Set whether to enable the `MicroProfileMetricsCamelContextEventNotifier` for capturing metrics about the CamelContext, such as status and uptime.

|boolean
|`true`
|===