Package io.greptime.common.util

Interface Summary

Interface	Description
ObjectPool<T>	An object pool.
ObjectPool.Resource<T>	Defines a resource, and the way to create and destroy instances of it.

Class Summary

Class	Description
Clock	A clock implementation which default returns the current millis.
Clock.UserTimeClock	A clock implementation which returns the current millis.
Cpus	Utility for cpu.
DirectExecutor	A direct executor.
Ensures	Simple static methods to be called at the start of your own methods to verify correct arguments and state.
ExecutorServiceHelper	Executor service shutdown helper.
Files	File utilities.
LogScheduledThreadPoolExecutor	A ThreadPoolExecutor that can additionally schedule tasks to run after a given delay with a logger witch can print error message for failed execution.
LogThreadPoolExecutor	A ExecutorService that witch can print error message for failed execution.
MetricExecutor	A Executor that with a timer metric which aggregates timing durations and provides duration statistics.
MetricReporter	A reporter which outputs metrics to a PrintStream, like System.out.
MetricReporter.Builder	A builder for MetricReporter instances.
MetricScheduledThreadPoolExecutor	A ThreadPoolExecutor that can additionally schedule tasks to run after a given delay with a timer metric which aggregates timing durations and provides duration statistics.
MetricsUtil	In GreptimeDB client, metrics are required.
MetricThreadPoolExecutor	A ExecutorService that with a timer metric which aggregates timing durations and provides duration statistics.
NamedThreadFactory	Named thread factory.
Platform	Platform utilities.
RcObjectPool<T>	An shared object pool with ref count.
RcResourceHolder<T>	Resource holder with ref count.
RefCell<T>	A reference cell.
SerializingExecutor	A SerializingExecutor is a queue of tasks that run in sequence.
ServiceLoader<S>	A simple service-provider loading facility (SPI).
SharedScheduledPool	Like rust: pub type SharedScheduledPool = RcObjectPool
SharedThreadPool	Like rust: pub type SharedThreadPool = RcObjectPool
StringBuilderHelper	Reuse StringBuilder based on ThreadLocal.
Strings	Static utility methods pertaining to String or CharSequence instances.
SystemPropertyUtil	A collection of utility methods to retrieve and parse the values of the Java system properties.
ThreadPoolMetricRegistry	A global timer metric registry for thread pool, use threadLocal to pass timer context.
ThreadPoolUtil	Factory and utility methods for creating ThreadPoolExecutor and ScheduledThreadPoolExecutor.
ThreadPoolUtil.PoolBuilder
ThreadPoolUtil.ScheduledPoolBuilder