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Connection Configuration URI

An Apache ActiveMQ connection can be configured by explicitly setting properties on the ActiveMQConnection or ActiveMQConnectionFactory objects themselves via the bean properties or using the following URI syntax.

Example

You set the property called jms.$PROPERTY on a regular connection URI. For example you can set the brokerURL on your ActiveMQConnectionFactory to the following value to enable Async Sends

tcp://localhost:61616?jms.useAsyncSend=true

Connection Options

Use the Correct Prefix!

The following options should be prefixed with jms. when used on a brokerURL or a broker's transport connector.

Option Name

Default Value

Description

alwaysSessionAsync

true

When true a separate thread is used for dispatching messages for each Session in the Connection.

A separate thread is always used when there's more than one session, or the session isn't in Session.AUTO_ACKNOWLEDGE or Session.DUPS_OK_ACKNOWLEDGE mode.

alwaysSyncSend

false

When trueMessageProducer will always use Sync sends when sending a Message even if it is not required for the Delivery Mode.

auditDepth

2048

The size of the message window that will be audited for duplicates and out of order messages.

auditMaximumProducerNumber

64

Maximum number of producers that will be audited.

checkForDuplicates

true

When true the consumer will check for duplicate messages and properly handle the message to make sure that it is not processed twice inadvertently.

clientID

null

Sets the JMS clientID to use for the connection.

closeTimeout

15000

Sets the timeout, in milliseconds, before a close is considered complete. Normally a close() on a connection waits for confirmation from the broker.

This allows the close operation to timeout preventing the client from hanging when no broker is available.

consumerExpiryCheckEnabled

true

Controls whether message expiration checking is done in each MessageConsumer prior to dispatching a message. Disabling this check can lead to consumption of expired messages. (since 5.11).

copyMessageOnSend

true

Should a JMS message be copied to a new JMS Message object as part of the send() method in JMS. This is enabled by default to be compliant with the JMS specification.

For a performance boost set to false if you do not mutate JMS messages after they are sent.

disableTimeStampsByDefault

false

Sets whether or not timestamps on messages should be disabled or not.

For a small performance boost set to false.

dispatchAsync

false

Should the broker dispatch messages asynchronously to the consumer?

nestedMapAndListEnabled

true

Controls whether Structured Message Properties and MapMessages are supported so that Message properties and MapMessage entries can contain nested Map and List objects. Available from version 4.1.

objectMessageSerializationDefered

false

When an object is set on an ObjectMessage the JMS spec requires the object be serialized by that set method.

When true the object will not be serialized. The object may subsequently be serialized if the message needs to be sent over a socket or stored to disk.

optimizeAcknowledge

false

Enables an optimized acknowledgement mode where messages are acknowledged in batches rather than individually. Alternatively, you could use Session.DUPS_OK_ACKNOWLEDGE acknowledgement mode for the consumers which can often be faster.

WARNING: enabling this issue could cause some issues with auto-acknowledgement on reconnection.

optimizeAcknowledgeTimeOut

300

If > 0, specifies the max time, in milliseconds, between batch acknowledgements when optimizeAcknowledge is enabled. (since 5.6).

optimizedAckScheduledAckInterval

0

If > 0, specifies a time interval upon which all the outstanding ACKs are delivered when optimized acknowledge is used so that a long running consumer that doesn't receive any more messages will eventually ACK the last few un-ACK'ed messages (since 5.7).

optimizedMessageDispatch

true

If true a larger prefetch limit is used - only applicable for durable topic subscribers.

useAsyncSend

false

Forces the use of Async Sends which adds a massive performance boost; but means that the send() method will return immediately whether the message has been sent or not which could lead to message loss.

useCompression

false

Enables the use of compression on the message's body.

useRetroactiveConsumer

false

Sets whether or not retroactive consumers are enabled. Retroactive consumers allow non-durable topic subscribers to receive old messages that were published before the non-durable subscriber started.

warnAboutUnstartedConnectionTimeout

500

The timeout, in milliseconds, from the time of connection creation to when a warning is generated if the connection is not properly started via Connection.start() and a message is received by a consumer. It is a very common gotcha to forget to start the connection and then wonder why no messages are delivered so this option makes the default case to create a warning if the user forgets.

To disable the warning just set the value to < 0.

Nested Options

You can also configure nested objects on the connection object using the given prefixes. See the javadoc for a breakdown of each individual property.

Option Name

Object configured

See Also

jms.blobTransferPolicy.*

BlobTransferPolicy

Blob Message

jms.prefetchPolicy.*

ActiveMQPrefetchPolicy

What is the Prefetch Limit For?

jms.redeliveryPolicy.*

RedeliveryPolicy

Redelivery Policy

For example you could set

tcp://localhost:61616?jms.prefetchPolicy.all=100&jms.redeliveryPolicy.maximumRedeliveries=5
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