Configuration

Session Container

Configures the operation of the server as a whole.

Session Container Configuration Options
Directory (String)
Description The working directory for the web-socket server. Monitoring files will be created in this directory
Default $TMP/babl-server
Property babl.server.directory
API SessionContainerConfig.serverDirectory
Bind Address (String)
Description The hostname or IP address that the server will listen on for inbound TCP connections
Default 0.0.0.0
Property babl.server.bind.address
API SessionContainerConfig.bindAddress
Listen Port (String)
Description The port that the server will listen on for inbound TCP connections
Default 8080
Property babl.server.listen.port
API SessionContainerConfig.listenPort
Connection Backlog (int)
Description The maximum number of pending connections
Default 20
Property babl.server.connection.backlog
API SessionContainerConfig.connectionBacklog
Poll Mode Enabled (boolean)
Description Enables poll-mode when the number of active sessions is below a configurable limit
Default false
Property babl.server.poll.mode.enabled
API SessionContainerConfig.pollModeEnabled
Poll Mode Session Limit (int)
Description Receive sockets will be polled as part of the event-loop (rather than using select()) if the active session count is below or at this value
Default 5
Property babl.server.poll.mode.session.limit
API SessionContainerConfig.pollModeSessionLimit
Session Monitoring File Entry Count (int)
Description Sets the maximum number of sessions per monitoring file (monitoring files will be created as needed)
Default 4096
Property babl.server.session.monitoring.entry.count
API SessionContainerConfig.sessionMonitoringFileEntryCount
Session Poll Limit (int)
Description Sets the maximum number of sessions that will be ready for reading per invocation of the server event-loop
Default 200
Property babl.server.session.poll.limit
API SessionContainerConfig.sessionPollLimit
Active Session Limit (int)
Description Sets the maximum number of sessions for a given container
Default 1000
Property babl.server.active.session.limit
API SessionContainerConfig.activeSessionLimit
Connection Validator (String)
Description Fully-qualified classname of an implementation of ConnectionValidator
Default AlwaysValidConnectionValidator
Property babl.server.validation.validator
API SessionContainerConfig.connectionValidator
Validation Timeout Nanos (long)
Description Sets the timeout for connections to be validated
Default 10s
Property babl.server.validation.timeout
API SessionContainerConfig.validationTimeoutNanos
Server Idle Strategy (String)
Description Sets the idling strategy used in the Server event-loop. One of BUSY_SPIN,YIELDING,BACK_OFF,SLEEPING.
Default BUSY_SPIN
Property babl.server.idle.strategy
API SessionContainerConfig.serverIdleStrategy

Session

Configure per-session settings.

Session Configuration Options
Maximum Buffer Size (int)
Description The maximum size, in bytes that the session's send or receive buffer can grow to
Default 32MB
Property babl.session.buffer.max.size
API SessionConfig.maxBufferSize
Receive Buffer Size (int)
Description The initial size, in bytes of the session's receive buffer (used for encoded web socket frames read from the network)
Default 1KB
Property babl.session.buffer.receive.size
API SessionConfig.receiveBufferSize
Send Buffer Size (int)
Description The initial size, in bytes of the session's send buffer (used for web socket frames queued for writing to the network)
Default 1KB
Property babl.session.buffer.send.size
API SessionConfig.sendBufferSize
Decode Buffer Size (int)
Description The initial size, in bytes of the session's decode buffer (used for assembling decoded web socket frames before delivery to the application)
Default 1KB
Property babl.session.buffer.decode.size
API SessionConfig.sessionDecodeBufferSize
Decode Maximum Buffer Size (int)
Description The maximum size, in bytes of the session's decode buffer (used for assembling decoded web socket frames before delivery to the application)
Default 128KB
Property babl.session.buffer.decode.max.size
API SessionConfig.sessionDecodeBufferMaxSize
Maximum Web Socket Frame Length (int)
Description The maximum length, in bytes of the largest acceptable web socket frame
Default 64KB
Property babl.session.frame.max.size
API SessionConfig.maxWebSocketFrameLength
Ping Send Interval (long)
Description The time, in nanoseconds that an idle session will wait before sending a PING frame to its peer
Default 5s
Property babl.session.ping.interval
API SessionConfig.pingIntervalNanos
Pong Response Timeout (long)
Description The time, in nanoseconds that a session will wait before a PONG response before closing
Default 30s
Property babl.session.pong.response.timeout
API SessionConfig.pongResponseTimeoutNanos

Socket

Configures network socket settings.

Socket Configuration Options
Send Buffer Size (int)
Description The size, in bytes of the session's socket send buffer (SO_SND_BUF)
Default 64KB
Property babl.socket.send.buffer.size
API SocketConfig.sendBufferSize
Receive Buffer Size (int)
Description The size, in bytes of the session's socket receive buffer (SO_RCV_BUF)
Default 64KB
Property babl.socket.receive.buffer.size
API SocketConfig.receiveBufferSize
TCP No Delay Enabled (boolean)
Description Indicates whether Nagle's Algorithm should be disabled (SO_TCP_NODELAY)
Default false
Property babl.socket.tcpNoDelay.enabled
API SocketConfig.tcpNoDelay

Proxy

Configures the operation of the IPC transport between the session container and the application.

Only used when server deployment mode is DETACHED.

Proxy Configuration Options
Server Adapter Poll Fragment Limit (int)
Description The maximum number of fragments processed by the server adapter for a single poll call
Default 50
Property babl.proxy.server.adapter.poll.limit
API ProxyConfig.serverAdapterPollFragmentLimit
Application Adapter Poll Fragment Limit (int)
Description The maximum number of fragments processed by the application adapter for a single poll call
Default 40
Property babl.proxy.application.adapter.poll.limit
API ProxyConfig.applicationAdapterPollFragmentLimit
Server Stream Base ID (int)
Description The starting stream ID for server instances
Default 6000
Property babl.proxy.server.stream.base.id
API ProxyConfig.serverStreamBaseId
Application Stream Base ID (int)
Description The starting stream ID for application instances
Default 5000
Property babl.proxy.application.stream.base.id
API ProxyConfig.applicationStreamBaseId
Launch Media Driver (boolean)
Description Indicates whether an Aeron MediaDriver should be launched for use by proxies
Default false
Property babl.proxy.driver.launch
API ProxyConfig.launchMediaDriver
Media Driver Directory (String)
Description Indicates where the MediaDriver should be launched
Default ${java.io.tmpdir}/proxy-driver
Property babl.proxy.driver.dir
API ProxyConfig.mediaDriverDir
Performance Mode (String)
Description Configures the performance level of the launched MediaDriver
Default PerformanceMode.HIGH
Property babl.performance.mode
API PerformanceConfig.performanceMode

JVM Settings

For best performance, set the following system properties: