akka.akka-stream_2.12.2.5.8.source-code.reference.conf Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of akka-stream_2.12 Show documentation
Show all versions of akka-stream_2.12 Show documentation
Akka is a toolkit for building highly concurrent, distributed, and resilient message-driven applications for Java and Scala.
#####################################
# Akka Stream Reference Config File #
#####################################
akka {
stream {
# Default materializer settings
materializer {
# Initial size of buffers used in stream elements
initial-input-buffer-size = 4
# Maximum size of buffers used in stream elements
max-input-buffer-size = 16
# Fully qualified config path which holds the dispatcher configuration
# to be used by ActorMaterializer when creating Actors.
# When this value is left empty, the default-dispatcher will be used.
dispatcher = ""
# Cleanup leaked publishers and subscribers when they are not used within a given
# deadline
subscription-timeout {
# when the subscription timeout is reached one of the following strategies on
# the "stale" publisher:
# cancel - cancel it (via `onError` or subscribing to the publisher and
# `cancel()`ing the subscription right away
# warn - log a warning statement about the stale element (then drop the
# reference to it)
# noop - do nothing (not recommended)
mode = cancel
# time after which a subscriber / publisher is considered stale and eligible
# for cancelation (see `akka.stream.subscription-timeout.mode`)
timeout = 5s
}
# Enable additional troubleshooting logging at DEBUG log level
debug-logging = off
# Maximum number of elements emitted in batch if downstream signals large demand
output-burst-limit = 1000
# Enable automatic fusing of all graphs that are run. For short-lived streams
# this may cause an initial runtime overhead, but most of the time fusing is
# desirable since it reduces the number of Actors that are created.
# Deprecated, since Akka 2.5.0, setting does not have any effect.
auto-fusing = on
# Those stream elements which have explicit buffers (like mapAsync, mapAsyncUnordered,
# buffer, flatMapMerge, Source.actorRef, Source.queue, etc.) will preallocate a fixed
# buffer upon stream materialization if the requested buffer size is less than this
# configuration parameter. The default is very high because failing early is better
# than failing under load.
#
# Buffers sized larger than this will dynamically grow/shrink and consume more memory
# per element than the fixed size buffers.
max-fixed-buffer-size = 1000000000
# Maximum number of sync messages that actor can process for stream to substream communication.
# Parameter allows to interrupt synchronous processing to get upsteam/downstream messages.
# Allows to accelerate message processing that happening withing same actor but keep system responsive.
sync-processing-limit = 1000
debug {
# Enables the fuzzing mode which increases the chance of race conditions
# by aggressively reordering events and making certain operations more
# concurrent than usual.
# This setting is for testing purposes, NEVER enable this in a production
# environment!
# To get the best results, try combining this setting with a throughput
# of 1 on the corresponding dispatchers.
fuzzing-mode = off
}
io.tcp {
# The outgoing bytes are accumulated in a buffer while waiting for acknoledgment
# of pending write. This improves throughput for small messages (frames) without
# sacrificing latency. While waiting for the ack the stage will eagerly pull
# from upstream until the buffer exceeds this size. That means that the buffer may hold
# slightly more bytes than this limit (at most one element more). It can be set to 0
# to disable the usage of the buffer.
write-buffer-size = 16 KiB
}
}
# Fully qualified config path which holds the dispatcher configuration
# to be used by ActorMaterializer when creating Actors for IO operations,
# such as FileSource, FileSink and others.
blocking-io-dispatcher = "akka.stream.default-blocking-io-dispatcher"
default-blocking-io-dispatcher {
type = "Dispatcher"
executor = "thread-pool-executor"
throughput = 1
thread-pool-executor {
fixed-pool-size = 16
}
}
}
# configure overrides to ssl-configuration here (to be used by akka-streams, and akka-http – i.e. when serving https connections)
ssl-config {
protocol = "TLSv1.2"
}
}
# ssl configuration
# folded in from former ssl-config-akka module
ssl-config {
logger = "com.typesafe.sslconfig.akka.util.AkkaLoggerBridge"
}