Apache ActiveMQ ™ -- Configuring Wire Formats
Using ActiveMQ > Configuring Transports > ActiveMQ Connection URIs > Configuring Wire Formats
The OpenWire Wire Format
OpenWire is the default wire format used by ActiveMQ. It provides a highly efficient binary format for high speed messaging. OpenWire options can be configured on a JMS client's connection URI or on a broker's transport bind URI.
Option
Default
Description
cacheEnabled
true
Should commonly repeated values be cached so that less marshaling occurs?
cacheSize
1024
When cacheEnabled=true then this parameter is used to specify the number of values to be cached.
maxInactivityDuration
30000
The maximum inactivity duration (before which the socket is considered dead) in milliseconds. On some platforms it can take a long time for a socket to die. Therefore allow the broker to kill connections when they have been inactive for the configured period of time. Used by some transports to enable a keep alive heart beat feature.
Inactivity monitoring is disabled when set to a value <= 0.
maxInactivityDurationInitalDelay
10000
The initial delay before starting inactivity checks.
Yes, the word 'Inital' is supposed to be misspelled like that.
maxFrameSize
MAX_LONG
Maximum allowed frame size. Can help help prevent OOM DOS attacks.
sizePrefixDisabled
false
Should the size of the packet be prefixed before each packet is marshaled?
stackTraceEnabled
true
Should the stack trace of exception that occur on the broker be sent to the client?
tcpNoDelayEnabled
true
Does not affect the wire format, but provides a hint to the peer that TCP_NODELAY should be enabled on the communications Socket.
tightEncodingEnabled
true
Should wire size be optimized over CPU usage?
Use the Correct Prefix!
Wire format options must have the prefix wireFormat. to take effect, e.g., wireFormat.maxInactivityDuration=10000. Options missing this prefix will be ignored.
Example Configurations
Java:
ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("tcp://localhost:61616?wireFormat.cacheEnabled=false&wireFormat.tightEncodingEnabled=false");
Spring: