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Chapter 11. Peer Protocol
Abstract
The peer protocol uses embedded brokers to enable messaging clients to communicate with each other directly.
URI syntax
A
peer URI must conform to the following syntax:
peer://PeerGroup/BrokerName?BrokerOptions
Where the group name, PeerGroup, identifies the set of peers that can communicate with each other. That is, a given peer can connect only to the set of peers that specify the same PeerGroup name in their URLs. The BrokerName specifies the broker name for the embedded broker. The broker options, BrokerOptions, are specified in the form of a query list (for example,
?persistent=true).
Broker options
The peer URL supports the broker options described in Table 11.1, “Broker Options”.
| Option | Description |
|---|---|
useJmx | If true, enables JMX. Default is true. |
persistent | If true, the broker uses persistent storage. Default is true. |
populateJMSXUserID | If true, the broker populates the JMSXUserID message property with the sender’s authenticated username. Default is false. |
useShutdownHook | If true, the broker installs a shutdown hook, so that it can shut down properly when it receives a JVM kill. Default is true. |
brokerName | Specifies the broker name. Default is localhost. |
deleteAllMessagesOnStartup | If true, deletes all the messages in the persistent store as the broker starts up. Default is false. |
enableStatistics | If true, enables statistics gathering in the broker. Default is true. |
Dependencies
The peer protocol uses multicast discovery to locate active peers on the network. In order for this to work, you must ensure that the IP multicast protocol is enabled on your operating system.
