This page documents the various System Properties that are currently used in the Qpid Java code base.

STRICT_AMQP Type Boolean Default FALSE This forces the client to only send AMQP compliant frames. This will disable a number of JMS features. Queue Browser Message Selectors Durable Subscriptions Session Recover may result in duplicate message delivery Destination validation, so no InvalidDestinationException will be thrown This is associated with property STRICT_AMQP_FATAL Type Boolean Default FALSE This will cause any attempt to utilise an enhanced feature to throw and UnsupportedOperationException. When set to false then the exception will not occur but the feature will be disabled. e.g. The Queue Browser will always show no messages. Any message selector will be removed. IMMEDIATE_PREFETCH Type Boolean Default FALSE The default with AMQP is to start prefetching messages. However, with certain 3rd party Java tools, such as Mule this can cause a problem. Mule will create a consumer but never consume from it so any any prefetched messages will be stuck until that session is closed. This property is used to re-instate the default AMQP behaviour. The default Qpid behaviour is to prevent prefetch occurring, by starting the connection Flow Controlled, until a request for a message is made on the consumer either via a receive() or setting a message listener. amqj.default_syncwrite_timeout Type long Default 30000 The number length of time in millisecond to wait for a synchronous write to complete. amq.dynamicsaslregistrar.properties Type String Default org/apache/qpid/client/security/DynamicSaslRegistrar.properties The name of the SASL configuration properties file. amqj.heartbeat.timeoutFactor Type float Default 2.0 The factor used to get the timeout from the delay between heartbeats amqj.tcpNoDelay Type Boolean Default TRUE Disable Nagle's algorithm on the TCP connection. amqj.sendBufferSize integer Boolean Default 32768 This is the default buffer sized created by Mina. amqj.receiveBufferSize Type integer Default 32768 This is the default buffer sized created by Mina. amqj.protocolprovider.class Type String Default org.apache.qpid.server.protocol.AMQPFastProtocolHandler This specifies the default IoHandlerAdapter that represents the InVM broker. The IoHandlerAdapter must have a constructor that takes a single Integer that represents the InVM port number. amqj.protocol.logging.level Type Boolean Default null If set this will turn on protocol logging on the client. jboss.host Used by the JBossConnectionFactoryInitialiser to specify the host to connect to perform JNDI lookups. jboss.port Used by the JBossConnectionFactoryInitialiser to specify the port to connect to perform JNDI lookups. amqj.MaximumStateWait Default 30000 Used to set the maximum time the State Manager should wait before timing out a frame wait.

security Default null String representing the Security level to be used to on the connection to the broker. The null default results in no security or PLAIN. When used with jmxconnector 'javax.management.remote.jmxmp.JMXMPConnector' a security value of 'CRAM-MD5' will result in all communication to the broker being encrypted. jmxconnector Default null String representing the JMXConnector class used to perform the connection to the broker. The null default results in the standard JMX connector. Utilising 'javax.management.remote.jmxmp.JMXMPConnector' and security 'CRAM-MD5' will result in all communication to the broker being encrypted. timeout Default 5000 Long value representing the milli seconds before connection to the broker should timeout.

archivepath Used in FileMessageDispatcher. This properties specifies the directory to move payload file(s) to archive location as no error