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Changelog

2.5.0

  • Removed warmup checks
  • Removed cohort-http module. Instead these healthchecks can be found inside cohort-ktor or cohort-vertx depending on your choice of framework.

2.4.1

  • Bumped versions of dependencies
  • Added deployment logging on startup

2.4.0

  • Renamed cohort-core to cohort-ktor.
  • Added Vertx support.

2.3.1

  • Refactor: use Kafka interfaces instead of implementations
  • Fix: align compileJava and compileKotlin tasks target
  • Feature: make it possible to register multiple instances of the same check
  • Fix: DatabaseConnectionHealthCheck should return Unhealthy when connection is invalid
  • Fix: make the MongoConnectionHealthCheck usable with both sync and async clients

2.3.0

  • Added Listener interface for registration and healthcheck events.
  • Deprecated the register methods that use a single delay parameter.

2.2.1

  • Added logHealthyStatus option to logging subscribers

2.2.0

  • Added new Kafka healthchecks: KafkaConsumerRecordsConsumedRateHealthCheck, KafkaConsumerRecordsConsumedHealthCheck, KafkaConsumerTimeBetweenPollHealthCheck
  • Deprecated KafkaConsumerSubscriptionHealthCheck
  • Renamed cohort-redis module to cohort-jedis
  • Added Log4j2HealthCheckLogging and LogbackHealthCheckLogging subscribers to log results of healthchecks

2.1.3

  • Added S3WriteBucketHealthCheck

2.1.2

  • Added ArrayCopyWarmup
  • Added EndpointStartupHealthCheck
  • Added HttpRequestWarmup

2.1.1

  • Allow specifying the coroutine dispatcher when creating a KafkaConsumerSubscriptionHealthCheck.
  • Fixed incorrect message on the ThreadStateHealthCheck.

2.1.0

  • Introduced new WarmupRegistry to allow warmups to specify duration instead of iteration counts.
  • Allow routes to be registered in any Ktor routing block
  • Added KafkaConsumerSubscriptionHealthCheck
  • Added close method to HealthCheckRegistry
  • Auto shutdown HealthCheckRegistry when JVM is terminating.
  • Added FibonacciWarmup, DataSourceConnectionWarmup, RedisClusterConnectionWarmup, JacksonMapperWarmup.

2.0.2

  • Fixed race condition with 2.0.x warmup starts

2.0.1

  • Fixed micrometer metrics tag name for status tag
  • Fixed Cohort plugin package name
  • Added overloaded registry method

2.0.0

Minimum version of Kotlin is now 1.8

  • Removed Ktor 1.x module, and merged Ktor 2.x module into the cohort-core module.
    • No additional dependencies are required for ktor.
  • Added HttpWarmup, RedisConnectionWarmup, FibWarmup, JacksonWarmup, DataSourceWarmup warm up health checks which will execute for a period of time to warm the JVM / connections before reporting as healthy. These are intended to be used by startup probes in K8.
  • Added HotSpotCompilationTimeHealthCheck which will report healthy once Hotspot has performed a given amount of compilation.
  • Added cohort-lettuce module which contains Redis health and warmup checks using the Lettuce client, in contrast to the cohort-redis module which uses the Jedis client.
  • Added PulsarHealthCheck for Apache Pulsar clusters.
  • Added DynamoDBHealthCheck for AWS Dynamo DB instances.
  • Changed TcpHealthCheck package name

1.7.3

  • Fix logic with errorOnYellow in elastic cluster checks.

1.7.2

  • Fixed S3 and SQS checks to close client correctly.

1.7.1

  • Added DatabaseConnectionHealthCheck as a long term replacement for DatabaseHealthCheck (which is now deprecated) for checking that a DataSource can provide a connection and that the connection is valid. This variant uses the JDBC4 isValid method rather than executing an arbitrary query.

1.7.0

  • Added RabbitConnectionHealthCheck which checks for connectivity to a RabbitMQ instance.
  • Added MongoConnectionHealthCheck which checks for connectivity to a MongoDB instance.
  • Added SNSHealthCheck which checks for connectivity to an AWS SNS instance.
  • Added ElasticIndexHealthCheck which checks for presence of a topic, with option to fail if the topic is empty.
  • Allow custom tags to be set on Cohort micrometer integration.

1.6.2

  • Added better automatically generated health check names

1.6.1

  • Removed com.sksamuel prefix from automatically generated health check names when sending to micrometer.
  • Fixed calculation bug in GarbageCollectionTimeCheck

1.6.0

  • Added cohort-micrometer module for sending healthcheck metrics to a micrometer registry.

1.5.0

  • Added AWS S3ReadBucketHealthCheck
  • Added AWS SQSQueueHealthCheck
  • Deprecated Shutdown hooks in favour of built-in Ktor onShutdown.
  • Added arbitrary command support to redis health checks.

1.4.1

  • Fixed dbcp package names.

1.4.0

  • Added shutdown hooks
  • EngineShutdownHook used for graceful shutdown of the ktor server
  • Added endpointsPrefix setting to config, to allow adjusting the namespace under which endpoints are registered
  • Added autoEndpoints option to allow installing the endpoints inside your own routing space - in order to support authentication, or other around advice.
  • Added eviction endpoint for datasources to evict idle connections

1.3.0

  • Added new Kafka healthchecks:
    • KafkaConsumerRecordsConsumedRateHealthCheck
    • KafkaProducerRecordSendRateHealthCheck
    • KafkaConsumerLastPollTimeHealthCheck
  • Added new /cohort/memory endpoint for reporting memory and buffer pool information
  • Added new database min idle connection healthchecks:
    • HikariMinIdleHealthCheck
    • DbcpMinIdleHealthCheck
  • Added MaxFileDescriptorsHealthCheck
  • Added ProcessCpuHealthCheck

1.2.2

  • Updated Kakfa health checks to use AdminClient instead of props.

1.2.1

  • Updated Elastic health checks to accept RestHighLevelClient instead of hostnames.

1.2.0

  • Added support for Ktor2
  • Added invariant that healthcheck register is not empty

1.1.7

  • Added logUnhealthy option (default true) to log unhealthy checks
  • Added startUnhealthy option (default true) to HealthCheckRegistry that starts up all checks in failed mode

1.1.6

  • Added HttpHealthCheck for testing connectivity to http endpoints.
  • Tweaked configuration settings for redis health checks

1.1.5

  • Allow the Kafka client to be customized by passing in properties.
  • Added healthcheck override that accepts a function () -> Result<String>

1.1.4

  • Added /cohort/gc endpoint

1.1.3

  • First publicised release.