deadpool

Release deadpool 0.12.4

• Add unique id to objects which can be read via the Object::id method
• Add WeakPool<T> and Pool::weak() for non-owning, upgradeable pool references.
• Use num_cpus::get() * 2 as default pool size instead of num_cpu::get_physical() * 4 which should result in the same pool size for most systems with hyper threading but fixes the default pool size in containerized environments.
• Cache num_cpus::get() result to improve Pool creation performance.

• Update itertools dependency to version 0.13.0
• Change predicate parameter of Pool::retain method to FnMut
• Add RetainResult as return value of Pool::retain method
• Fix panic in Pool::resize method caused by shrinking and growing the pool in quick succession.

• Add WASM support

• Add Send to Manager::Type and Manager::Error associated types
• Add Send to Manager::create and Manager::recycle return types

• Make Timeouts::new and Timeouts::wait_millis functions const fns

• Remove unused console dependency

• Remove async_trait dependency
• Bump up MSRV to 1.75

• Remove unreachable enum variant BuildError::Backend
• Split Status.available into available and waiting.
• Add QueueMode configuration option for choosing between a FIFO (default) and LIFO queue.
• Remove HookError::Continue and HookError::Abort variants replacing it with the contents of HookErrorCause. Returning a HookError from a post_create hook causes the Pool::get operation to fail while returning it from a pre_recycle or post_recycle hook the operation continues.
• Add metrics argument to Manager::recycle method.
• Remove deprecated managed::sync module.
• Remove deprecated managed::Pool::try_get method.
• Bump up MSRV to 1.63 to match the one of tokio.

• Fix bug causing the pool to exceed its max_size in the case of a recycling error.
• Fix panic caused by an integer overflow in the case of a failing post_create hook.

• Fix HookError and HookErrorCause in re-exports

• Add Pool::retain method
• Fix Pool::get_timeouts method
• Deprecate managed::Pool::try_get
• Add Pool::timeouts method

• PoolConfig now implements Serialize

• Deprecate managed::sync module in favor of deadpool-sync crate
• Extract runtime module as separate deadpool-runtime crate

• Breaking: Replace config feature with serde (opted out by default)
• Fix std::error::Error::source implementations for library errors
• Add Runtime::spawn_blocking method
• Add Runtime::spawn_blocking_background method
• Remove Runtime::None in favor of Option<Runtime>
• Remove Pool::new method
• Add Pool::builder method and PoolBuilder struct
• Add Object::metrics method and Metrics struct
• Update tokio dependency to version 1.5.0
• Add post_create, pre_recycle and post_recycle hooks
• Add Pool::resize method
• Add managed_reexports macro

• Add deadpool-diesel to README
• Add Sync + Send as supertrait to Manager
• Fix usage of PhantomData in Pool struct: Pool is now Sync` regardless of the wrapper.

• Add Object::pool method

• Add support for closing pools
• Replace crossbeam-queue by Mutex<VecDeque<_>>
• Fix invalid size and available counts when recycling fails
• Update config dependency to version 0.11
• Remove deprecated from_env methods
• Add support for wrappers returned by the pool
• Use associated types for traits

• Update tokio dependency to version 1

• Update tokio dependency to version 0.3
• Update crossbeam-queue dependency to version 0.3
• Remove deprecated deadpool::* types
• Add deadpool-memcached to README

• Deprecate managed::Config::from_env
• Deprecate unmanaged::Config::from_env

• Add managed::Object::take method

• Move current pool implementation into managed module
• Add unmanaged version of the Pool which does not use a Manager to create and recycle objects.
• Add feature flags "managed" and "unmanaged" to enable only parts of this crate.
• Add max_size to pool Status
• Add support for config crate

• Add std::error::Error implementation for PoolError and RecycleError. This makes it more convenient to use the ? operator.

• Replace tokio::sync::mpsc::channel by crossbeam_queue::ArrayQueue which gets rid of the mutex when fetching an object from the pool.

• Make Pool::timeout_get public

• Add support for timeouts
• Make fields of pool status public
• Fix possible deadlock and make implementation a lot simpler by using the new tokio Semaphore and Receiver::try_recv.
• Add Pool::try_get and Pool::timeout_get functions

• Add deadpool-lapin to README
• Add deadpool-redis to README
• Fix possible stale state and deadlock if a future calling Pool::get is aborted. This is related to https://github.com/tokio-rs/tokio/issues/1898
• Make recycling more robust by changing the Manager::recycle to a non consuming API.

• Add documentation for docs.rs
• Remove PoolInner and PoolSize struct from public interface
• Improve example in README.md and crate root

• Update to tokio 0.2

• Split deadpool and deadpool-postgres in separate crates instead of one with feature flags.

• First release

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