v1.0.0-rc.4

New Features

• Property-based meter filters!
• SimpleMeterRegistry can now be configured to accumulate values or use a step-interval
• OkHttp instrumentation.
• Now validating user-provided HistogramConfigs
• Improved internal data structure of composite meters for better performance
• Improved histogram implementations allow for the retrieval of multiple percentiles/buckets in one call for better performance.
• Conditionally disable RestTemplate customizer to allow micrometer-spring-legacy to be used for older versions of Spring Boot (pre 1.5.x)
• Binders in MeterBindersConfiguration can now be disabled via properties
• ThreadPoolTaskExecutor metrics binder
• Jetty statistics binder
• Hibernate binder

Fixes

• WebMvcTags - Strip trailing URI slashes to limit dimensional explosion
• MetricsFilter now forwards to other filters when a matchable handler mapping cannot be found
• CumulativeDistributionSummary - prevent losing the maximum in case of data-race
• CumulativeTimer - prevent losing the maximum in case of data-race
• StatsD registry now accepts custom naming conventions
• Fix thread safety issues in MeterRegistry
• Add base unit to buffer pool metrics

v1.0.0-rc.3

New features

• Meter filters - allow for ignoring tags, adding common tags, ignoring whole metrics, etc at a registry level
• Replaced histogram and quantiles implementations with HdrHistogram
• Servlet metrics are recorded with a servlet Filter instead of HandlerInterceptor (metrics are now recorded for resources blocked by spring-security)
• HierarchicalNameMapper is now customizable for Etsy-flavored StatsD
• DatadogMeterRegistry matches the naming convention of dogstatsd
• Fluent builders for FunctionCounter and FunctionTimer
• Support collecting max for Prometheus timers
• Add processor metrics binder to the list of default binders autoconfigured by Spring
• Create DEFAULT for each registry implementation's config interface
• Add host property to datadog config so that traffic can pass through a proxy
• Meta-annotation support for @timed
• Add record method that accepts Duration to Timer

Fixes

• Servlet request metrics report the targetted URI in the event of an error rather than /error
• Adjust metric name for "system load average"
• Logback - MetricsTurboFilter no longer increments stats when is<LEVEL>Enabled() is called.
• Properly synchronize metrics creation (the symptom previously was duplicate lines in Prometheus output)
• Fixed file descriptor metrics names to match Prometheus standard
• Description is present for all meters registered to Prometheus
• Rename autoconfigured clock beans in Spring to avoid naming collisions
• Ensure MeterRegistryConfigurers are run before autoconfigured binders
• Add StringToDurationConverter to Prometheus configuration
• Fix erroneously set description set as baseunit for ThreadPoolExecutor

v1.0.0-rc.2

• Added support for Statsd (Etsy, Datadog, and Telegraf flavors).
• Added additional cache binders (Hazelcast, JCache, ConcurrentMapCache, Ehcache).
• Add property to select Graphite pickle or plaintext protocol.
• New technology compatibility kit to test custom registry implementations (extend MeterRegistryCompatibilityKit, found in micrometer-test).
• Narrow the use of synchronization to make Micrometer suitable for use in reactive apps.
• Add support for file descriptor metrics.
• Add database table size binder.
• New function-tracking timer to convert monotonically increasing counts/totalTimes from third-party APIs into a native timer form for various systems. Now you can do things like alert when your cache miss rate goes through the roof suddenly!
• FIX Histogram.percentiles() and Histogram.percentilesTimer() now produce valid Prometheus series.
• FIX Make WebMvcMetrics#tagWithException(ex) public again.
• FIX Duplicate dimensions when common tags are present.

v1.0.0-rc.1

• This is the version incorporated into Spring Boot 2.0 M4

• Backported changes to types and packages that Spring Boot team made for Spring Boot 2 M4 to micrometer-spring-legacy.

• Change Spring support to classpath + property-based enablement for individual registries.

• Add property that controls whether Spring auto-times all request mappings.

• Add UptimeMetrics.

• Introduced percentile histograms with automatically selected buckets for aggregable percentile approximations.

• Consistent naming on JVM metrics originating in binders.

• Add area tag (heap,nonheap) to JVM memory pools.

• New auto-completable @ConfigurationProperties for registry configs.

• FIX - Convention names not applied to custom meters.

• FIX - Data size metrics for Prometheus do not contain unit.

• FIX - RestTemplate instrumentation doesn't capture URI when calling restTemplate with a URI object instead of a URL string.

• FIX - Spring Boot application only reports metrics for 200 OK responses.

v0.10.0.RELEASE

• Added CompositeMeterRegistry for shipping metrics to multiple systems.
• Added Metrics, an all-static class for building meters against a global static composite registry. Using this is the new recommended approach for common libraries.
• Added a NamingConvention interface, a config option to set a naming convention on a registry, and added default naming conventions for all supported monitoring systems.
• Moved longTaskTimer behind MeterRegistry.more(), where more esoteric meter patterns will live as they are added.
• New MeterRegistry.find(...) fluent builder for finding meters with a particular type, name, set of tags, value, etc.
• HierarchicalNameMapper is now a functional interface.
• Eliminated the old Meters.monitor(...) type builders, and put the monitor method on each binder (e.g. for Guava cache metrics, you now use GuavaCacheMetrics.monitor(...). This prevents runtime issues related to missing optional dependencies.
• Added instrumentation for Caffeine caches.

v0.9.0.RELEASE

• Support for InfluxDB
• New meter binder for Spring Integration (adds metrics from channels, handlers, and sources)
• New injectable ControllerMetrics for use in completing timing metrics in custom @ExceptionHandler.

v0.8.0.RELEASE

• Support for exporting to Graphite, Ganglia, and JMX via a new DropwizardMeterRegistry. The new registry can be used as a base for exporting to other hierarchical systems as needed.
• Broadened the use of TagFormatter to sanitize metric names and tags across all supported monitoring systems for both user-provided values and binder-provided values.
• Fixed common tag values not being correctly appended to Prometheus meters (@eloo).
• Added MeterRegistryConfigurer which allows for the application of common tags before any meters are registered (@eloo).

v0.7.0.RELEASE

• Support common tags on registries which are added to every metric reported to the monitoring system (useful for things like host, region, stack, etc.).
• Fixed synchronization issue on deduping new metrics (#53) @eloo.
• PrometheusMeterRegistry now constructs a new instance of CollectorRegistry to support better test isolation (#54) @eloo.
• Prevent garbage collection of DataSourcePoolMetadata that caused DataSource gauges to eventually become invalid @eloo.
• Provide abstract Spectator implementation for push backends taking step counts and changed the Datadog registry to use this implementation @CameLion.

v0.6.3.RELEASE

• First successful release under io.micrometer group.
• Spring 4/Boot 1 support has been split into a micrometer-spring-legacy project, and Spring 5/Boot 2 support will be merged directly into the Boot 2 codebase.

v0.6.1.RELEASE

Do not use -- only partially released to Maven Central and JCenter

• Changed to a static version on assertj in micrometer-spring-legacy in order to publish to Maven Central.