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<worker /> - XNIO Client

You can use the worker element, which is in the urn:xnio:3.5 namespace, to configure a default XNIO worker using the wildfly-config.xml file. This section describes how to do this.

This section describes the child elements that can be configured within this root worker element.

The <worker /> element can optionally contain the following child elements, as described in the next sections:

  • <daemon-threads />
  • <worker-name />
  • <pool-size />
  • <task-keepalive />
  • <io-threads />
  • <stack-size />
  • <outbound-bind-addresses />

<daemon-threads />

This optional element takes a single required attribute:

Attribute Name Attribute Description
value The value of the setting (required). A value of true indicates that worker and task threads should be daemon threads, and false indicates that they should not be daemon threads. If this element is not given, a value of true is assumed.

This element has no content.

<worker-name />

This element defines the name of the worker. The worker name will appear in thread dumps and in JMX.

Attribute Name Attribute Description
value The worker's name (required).

This element has no content.

<pool-size />

This optional element defines the size parameters of the worker's task thread pool. The following attributes are allowed:

Attribute Name Attribute Description
max-threads A positive integer which specifies the maximum number of threads that should be created (required).

<task-keepalive />

This optional element establishes the keep-alive time of task threads before they may be expired.

Attribute Name Attribute Description
value A positive integer which represents the minimum number of seconds to keep idle threads alive (required).

<io-threads />

This optional element determines how many I/O (selector) threads should be maintained. Generally this number should be a small constant multiple of the number of available cores.

Attribute Name Attribute Description
value A positive integer value for the number of I/O threads (required).

<stack-size />

This optional element establishes the desired minimum thread stack size for worker threads.

Attribute Name Attribute Description
value A positive integer value which indicates the requested stack size, in bytes (required).

<outbound-bind-addresses />

This optional element specifies bind addresses to use for outbound connections. Each bind address mapping consists of a destination IP address block, and a bind address and optional port number to use for connections to destinations within that block.

<bind-address />

This element defines an individual bind address mapping.

Attribute Name Attribute Description
match The IP address block in CIDR notation to match (required).
bind-address The IP address to bind to if the address block matches (required).
bind-port A specific port number to bind to if the address block matches (optional, defaults to 0 meaning "any port").
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