511 lines
35 KiB
Markdown
511 lines
35 KiB
Markdown
Configuration Reference
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=======================
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This section is a quick index for looking up configuration. Click on the
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element name to go to the specific chapter.
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Server Configuration
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====================
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activemq-configuration.xml
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--------------------------
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This is the main core server configuration file which contains to elements
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'core' and 'jms'.
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The 'core' element contains the main server configuration while the 'jms'
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element is used by the server side JMS service to load JMS Queues, Topics
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# The core configuration
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This describes the root of the XML configuration. You will see here also multiple sub-types listed.
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For example on the main config you will have bridges and at the [list of bridge](#bridge-type) type we will describe the properties for that configuration.
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Name | Description
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:--- | :---
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[acceptors](configuring-transports.md "16.1. Understanding Acceptors") | a list of remoting acceptors
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[acceptors.acceptor](configuring-transports.md "16.1. Understanding Acceptors") | Each acceptor is composed for just an URL
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[address-settings](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | [a list of address-setting](#address-setting-type)
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[allow-failback](ha.md "39.1.4. Failing Back to live Server") | Should stop backup on live restart. default true
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[async-connection-execution-enabled](connection-ttl.md "17.3. Configuring Asynchronous Connection Execution") | If False delivery would be always asynchronous. default true
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[bindings-directory](persistence.md "15.1. Configuring the bindings journal") | The folder in use for the bindings folder
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[bridges](core-bridges.md "Chapter 36. Core Bridges") | [a list of bridge](#bridge-type)
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[broadcast-groups](clusters.md "Chapter 38. Clusters") | [a list of broadcast-group](#broadcast-group-type)
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[check-for-live-server](ha.md) | Used for a live server to verify if there are other nodes with the same ID on the topology
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[cluster-connections](clusters.md "Chapter 38. Clusters") | [a list of cluster-connection](#cluster-connection-type)
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[cluster-password](clusters.md "Chapter 38. Clusters") | Cluster password. It applies to all cluster configurations.
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[cluster-user](clusters.md "Chapter 38. Clusters") | Cluster username. It applies to all cluster configurations.
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[connection-ttl-override](connection-ttl.md) | if set, this will override how long (in ms) to keep a connection alive without receiving a ping. -1 disables this setting. Default -1
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[connectors.connector](configuring-transports.md "16.2. Understanding Connectors") | The URL for the connector. This is a list
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[create-bindings-dir](persistence.md "15.1. Configuring the bindings journal") | true means that the server will create the bindings directory on start up. Default=true
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[create-journal-dir](persistence.md) | true means that the journal directory will be created. Default=true
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[discovery-groups](clusters.md "Chapter 38. Clusters") | [a list of discovery-group](#discovery-group-type)
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[diverts](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | [a list of diverts to use](#divert-type)
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[graceful-shutdown-enabled](graceful-shutdown.md "Graceful Server Shutdown") | true means that graceful shutdown is enabled. Default=true
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[graceful-shutdown-timeout](graceful-shutdown.md "Graceful Server Shutdown") | Timeout on waitin for clients to disconnect before server shutdown. Default=-1
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[grouping-handler](message-grouping.md "Chapter 28. Message Grouping") | Message Group configuration
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[id-cache-size](duplicate-detection.md "37.2. Configuring the Duplicate ID Cache") | The duplicate detection circular cache size. Default=20000
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[jmx-domain](management.md "30.2.1. Configuring JMX") | the JMX domain used to registered MBeans in the MBeanServer. Default=org.apache.activemq
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[jmx-management-enabled](management.md "30.2.1. Configuring JMX") | true means that the management API is available via JMX. Default=true
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[journal-buffer-size](persistence.md) | The size of the internal buffer on the journal in KB. Default=490 KiB
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[journal-buffer-timeout](persistence.md) | The Flush timeout for the journal buffer
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[journal-compact-min-files](persistence.md) | The minimal number of data files before we can start compacting. Default=10
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[journal-compact-percentage](persistence.md) | The percentage of live data on which we consider compacting the journal. Default=30
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[journal-directory](persistence.md) | the directory to store the journal files in. Default=data/journal
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[journal-file-size](persistence.md) | the size (in bytes) of each journal file. Default=10485760 (10 MB)
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[journal-max-io](persistence.md#configuring.message.journal.journal-max-io) | the maximum number of write requests that can be in the AIO queue at any one time. Default is 500 for AIO and 1 for NIO.
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[journal-min-files](persistence.md#configuring.message.journal.journal-min-files) | how many journal files to pre-create. Default=2
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[journal-sync-non-transactional](persistence.md) | if true wait for non transaction data to be synced to the journal before returning response to client. Default=true
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[journal-sync-transactional](persistence.md) | if true wait for transaction data to be synchronized to the journal before returning response to client. Default=true
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[journal-type](persistence.md) | the type of journal to use. Default=ASYNCIO
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[large-messages-directory](large-messages.md "23.1. Configuring the server") | the directory to store large messages. Default=data/largemessages
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[management-address](management.md "30.3.1. Configuring Core Management") | the name of the management address to send management messages to. It is prefixed with "jms.queue" so that JMS clients can send messages to it. Default=jms.queue.activemq.management
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[management-notification-address](management.md "30.5.2.1. Configuring The Core Management Notification Address") | the name of the address that consumers bind to receive management notifications. Default=activemq.notifications
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[mask-password](configuration-index.md "50.1.3. Using Masked Passwords in Configuration Files") | This option controls whether passwords in server configuration need be masked. If set to "true" the passwords are masked. Default=false
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[max-saved-replicated-journals-size]() | This specifies how many times a replicated backup server can restart after moving its files on start. Once there are this number of backup journal files the server will stop permanently after if fails back. Default=2
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[memory-measure-interval](perf-tuning.md) | frequency to sample JVM memory in ms (or -1 to disable memory sampling). Default=-1
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[memory-warning-threshold](perf-tuning.md) | Percentage of available memory which will trigger a warning log. Default=25
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[message-counter-enabled](management.md "30.6.1. Configuring Message Counters") | true means that message counters are enabled. Default=false
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[message-counter-max-day-history](management.md "30.6.1. Configuring Message Counters") | how many days to keep message counter history. Default=10 (days)
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[message-counter-sample-period](management.md "30.6.1. Configuring Message Counters") | the sample period (in ms) to use for message counters. Default=10000
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[message-expiry-scan-period](message-expiry.md "22.3. Configuring The Expiry Reaper Thread") | how often (in ms) to scan for expired messages. Default=30000
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[message-expiry-thread-priority](message-expiry.md "22.3. Configuring The Expiry Reaper Thread") | the priority of the thread expiring messages. Default=3
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[page-max-concurrent-io](paging.md "24.3. Paging Mode") | The max number of concurrent reads allowed on paging. Default=5
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[paging-directory](paging.md "24.2. Configuration") | the directory to store paged messages in. Default=data/paging
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[persist-delivery-count-before-delivery](undelivered-messages.md "21.3. Delivery Count Persistence") | True means that the delivery count is persisted before delivery. False means that this only happens after a message has been cancelled. Default=false
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[persistence-enabled](persistence.md "15.6. Configuring ActiveMQ for Zero Persistence") | true means that the server will use the file based journal for persistence. Default=true
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[persist-id-cache](duplicate-detection.md "37.2. Configuring the Duplicate ID Cache") | true means that ID's are persisted to the journal. Default=true
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[queues](queue-attributes.md "25.1. Predefined Queues") | [a list of queue to be created](#queue-type)
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[remoting-incoming-interceptors](intercepting-operations.md "Chapter 47. Intercepting Operations") | A list of interceptor
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[resolveProtocols]() | Use [ServiceLoader](http://docs.oracle.com/javase/tutorial/ext/basics/spi.html) to load protocol modules. Default=true
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[scheduled-thread-pool-max-size](thread-pooling.md#server.scheduled.thread.pool "41.1.1. Server Scheduled Thread Pool")| Maximum number of threads to use for the scheduled thread pool. Default=5
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[security-enabled](security.md "Chapter 31. Security") | true means that security is enabled. Default=true
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[security-invalidation-interval](security.md "Chapter 31. Security") | how long (in ms) to wait before invalidating the security cache. Default=10000
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[security-settings](security.md "31.1. Role based security for addresses") | [a list of security-setting](#security-setting-type)
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[thread-pool-max-size](thread-pooling.md "41.1.1. Server Scheduled Thread Pool") | Maximum number of threads to use for the thread pool. -1 means 'no limits'.. Default=30
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[transaction-timeout](transaction-config.md "Chapter 18. Resource Manager Configuration") | how long (in ms) before a transaction can be removed from the resource manager after create time. Default=300000
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[transaction-timeout-scan-period](transaction-config.md "Chapter 18. Resource Manager Configuration") | how often (in ms) to scan for timeout transactions. Default=1000
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[wild-card-routing-enabled](wildcard-routing.md "Chapter 12. Routing Messages With Wild Cards") | true means that the server supports wild card routing. Default=true
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#address-setting type
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Name | Description
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:--- | :---
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[match ](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | The filter to apply to the setting
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[dead-letter-address](undelivered-messages.md "21.2.1. Configuring Dead Letter Addresses") | dead letter address
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[expiry-address](message-expiry.md "22.2. Configuring Expiry Addresses") | expired messages address
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[expiry-delay](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | expiration time override, -1 don't override with default=-1
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[redelivery-delay](undelivered-messages.md "21.1.1. Configuring Delayed Redelivery") | time to redeliver a message (in ms) with default=0
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[redelivery-delay-multiplier](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | multiplier to apply to the "redelivery-delay"
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[max-redelivery-delay](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | Max value for the redelivery-delay
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[max-delivery-attempts](undelivered-messages.md "21.2.1. Configuring Dead Letter Addresses") | Number of retries before dead letter address, default=10
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[max-size-bytes](paging.md "Chapter 24. Paging") | Limit before paging. -1 = infinite
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[page-size-bytes](paging.md "Chapter 24. Paging") | Size of each file on page, default=10485760
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[page-max-cache-size](paging.md "Chapter 24. Paging") | Maximum number of files cached from paging default=5
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[address-full-policy](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | Model to chose after queue full
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[message-counter-history-day-limit](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | Days to keep in history
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[last-value-queue](last-value-queues.md "Chapter 27. Last-Value Queues") | Queue is a last value queue, default=false
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[redistribution-delay](clusters.md "Chapter 38. Clusters") | Timeout before redistributing values after no consumers. default=-1
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[send-to-dla-on-no-route](queue-attributes.md "25.3. Configuring Queues Via Address Settings") | Forward messages to DLA when no queues subscribing. default=false
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#bridge type
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Name | Description
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:--- | :---
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[name ](core-bridges.md "Chapter 36. Core Bridges") | unique name
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[queue-name](core-bridges.md "Chapter 36. Core Bridges") | name of queue that this bridge consumes from
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[forwarding-address](core-bridges.md "Chapter 36. Core Bridges") | address to forward to. If omitted original address is used
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[ha](core-bridges.md "Chapter 36. Core Bridges") | whether this bridge supports fail-over
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[filter](core-bridges.md "Chapter 36. Core Bridges") | optional core filter expression |
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[transformer-class-name](core-bridges.md "Chapter 36. Core Bridges") | optional name of transformer class
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[min-large-message-size](core-bridges.md "Chapter 36. Core Bridges") | Limit before message is considered large. default 100KB
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[check-period](connection-ttl.md "Chapter 17. Detecting Dead Connections") | [TTL](http://en.wikipedia.org/wiki/Time_to_live "Time to Live") check period for the bridge. -1 means disabled. default 30000 (ms)
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[connection-ttl](connection-ttl.md "Chapter 17. Detecting Dead Connections") | [TTL](http://en.wikipedia.org/wiki/Time_to_live "Time to Live") for the Bridge. This should be greater than the ping period. default 60000 (ms)
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[retry-interval](core-bridges.md "Chapter 36. Core Bridges") | period (in ms) between successive retries. default 2000
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[retry-interval-multiplier](core-bridges.md "Chapter 36. Core Bridges") | multiplier to apply to successive retry intervals. default 1
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[max-retry-interval](core-bridges.md "Chapter 36. Core Bridges") | Limit to the retry-interval growth. default 2000
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[reconnect-attempts](core-bridges.md "Chapter 36. Core Bridges") | maximum number of retry attempts, -1 means 'no limits'. default -1
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[use-duplicate-detection](core-bridges.md "Chapter 36. Core Bridges") | forward duplicate detection headers?. default true
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[confirmation-window-size](core-bridges.md "Chapter 36. Core Bridges") | number of bytes before confirmations are sent. default 1MB
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[user](core-bridges.md "Chapter 36. Core Bridges") | Username for the bridge, the default is the cluster username
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[password](core-bridges.md "Chapter 36. Core Bridges") | Password for the bridge, default is the cluster password
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[reconnect-attempts-same-node](core-bridges.md "Chapter 36. Core Bridges") | Number of retries before trying another node. default 10
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# broadcast-group type
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Name | Type
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[name ](clusters.md "Chapter 38. Clusters") | unique name
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[local-bind-address](clusters.md "Chapter 38. Clusters") | local bind address that the datagram socket is bound to
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[local-bind-port](clusters.md "Chapter 38. Clusters") | local port to which the datagram socket is bound to
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[group-address](clusters.md "Chapter 38. Clusters") | multicast address to which the data will be broadcast
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[group-port](clusters.md "Chapter 38. Clusters") | UDP port number used for broadcasting
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[broadcast-period](clusters.md "Chapter 38. Clusters") | period in milliseconds between consecutive broadcasts. default 2000
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[jgroups-file](clusters.md) | Name of JGroups configuration file
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[jgroups-channel](clusters.md) | Name of JGroups Channel
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[connector-ref](clusters.md "Chapter 38. Clusters") |
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#cluster-connection type
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Name | Description
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:--- | :---
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[name](clusters.md "Chapter 38. Clusters") | unique name
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[address](clusters.md "Chapter 38. Clusters") | name of the address this cluster connection applies to
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[connector-ref](clusters.md "Chapter 38. Clusters") | Name of the connector reference to use.
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[check-period](connection-ttl.md "Chapter 17. Detecting Dead Connections") | The period (in milliseconds) used to check if the cluster connection has failed to receive pings from another server with default = 30000
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[connection-ttl](connection-ttl.md "Chapter 17. Detecting Dead Connections") | Timeout for TTL. Default 60000
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[min-large-message-size](large-messages.md "Chapter 23. Large Messages") | Messages larger than this are considered large-messages, default=100KB
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[call-timeout](clusters.md "Chapter 38. Clusters") | Time(ms) before giving up on blocked calls. Default=30000
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[retry-interval](clusters.md "Chapter 38. Clusters") | period (in ms) between successive retries. Default=500
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[retry-interval-multiplier](clusters.md "Chapter 38. Clusters") | multiplier to apply to the retry-interval. Default=1
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[max-retry-interval](clusters.md "Chapter 38. Clusters") | Maximum value for retry-interval. Default=2000
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[reconnect-attempts](clusters.md "Chapter 38. Clusters") | How many attempts should be made to reconnect after failure. Default=-1
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[use-duplicate-detection](clusters.md "Chapter 38. Clusters") | should duplicate detection headers be inserted in forwarded messages?. Default=true
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[forward-when-no-consumers](clusters.md "Chapter 38. Clusters") | should messages be load balanced if there are no matching consumers on target? Default=false
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[max-hops](clusters.md "Chapter 38. Clusters") | maximum number of hops cluster topology is propagated. Default=1
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[confirmation-window-size](client-reconnection.md "Chapter 34. Client Reconnection and Session Reattachment")| The size (in bytes) of the window used for confirming data from the server connected to. Default 1048576
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[call-failover-timeout](clusters.md "38.3.1. Configuring Cluster Connections") | How long to wait for a reply if in the middle of a fail-over. -1 means wait forever. Default -1
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[notification-interval](clusters.md "Chapter 38. Clusters") | how often the cluster connection will notify the cluster of its existence right after joining the cluster. Default 1000
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[notification-attempts](clusters.md "Chapter 38. Clusters") | how many times this cluster connection will notify the cluster of its existence right after joining the cluster Default 2
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#discovery-group type
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Name | Description
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:--- | :---
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[name](clusters.md "Chapter 38. Clusters") | unique name
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[group-address](clusters.md "Chapter 38. Clusters") | Multicast IP address of the group to listen on
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[group-port](clusters.md "Chapter 38. Clusters") | UDP port number of the multi cast group
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[jgroups-file](clusters.md) | Name of a JGroups configuration file. If specified, the server uses JGroups for discovery.
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[jgroups-channel](clusters.md) | Name of a JGroups Channel. If specified, the server uses the named channel for discovery.
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[refresh-timeout]() | Period the discovery group waits after receiving the last broadcast from a particular server before removing that servers connector pair entry from its list. Default=10000
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[local-bind-address](clusters.md "Chapter 38. Clusters") | local bind address that the datagram socket is bound to
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[local-bind-port](clusters.md "Chapter 38. Clusters") | local port to which the datagram socket is bound to. Default=-1
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[initial-wait-timeout]() | time to wait for an initial broadcast to give us at least one node in the cluster. Default=10000
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#divert type
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Name | Description
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:--- | :---
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[name](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | unique name
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[transformer-class-name](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | an optional class name of a transformer
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[exclusive](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | whether this is an exclusive divert. Default=false
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[routing-name](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | the routing name for the divert
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[address](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | the address this divert will divert from
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[forwarding-address](diverts.md "Chapter 35. Diverting and Splitting Message Flows") | the forwarding address for the divert
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[filter](diverts.md "Chapter 35. Diverting and Splitting Message Flows")| optional core filter expression
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#queue type
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Name | Description
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:--- | :---
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[name ](queue-attributes.md "25.1. Predefined Queues") | unique name
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[address](queue-attributes.md "25.1. Predefined Queues") | address for the queue
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[filter](queue-attributes.md "25.1. Predefined Queues") | optional core filter expression
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[durable](queue-attributes.md "25.1. Predefined Queues") | whether the queue is durable (persistent). Default=true
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#security-setting type
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Name | Description
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:--- | :---
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[match ](security.md "31.1. Role based security for addresses") | [address expression](wildcard-syntax.md)
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[permission](security.md "31.1. Role based security for addresses") |
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[permission.type ](security.md "31.1. Role based security for addresses") | the type of permission
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[permission.roles ](security.md "31.1. Role based security for addresses") | a comma-separated list of roles to apply the permission to
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----------------------------
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##The jms configuration
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Name | Type | Description
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:--- | :--- | :---
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[queue](using-jms.md "7.2. JMS Server Configuration") | Queue | a queue
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[queue.name (attribute)](using-jms.md "7.2. JMS Server Configuration") | String | unique name of the queue
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[queue.durable](using-jms.md "7.2. JMS Server Configuration") | Boolean | is the queue durable?. Default=true
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[queue.filter](using-jms.md "7.2. JMS Server Configuration") | String | optional filter expression for the queue
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[topic](using-jms.md "7.2. JMS Server Configuration") | Topic | a topic
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[topic.name (attribute)](using-jms.md "7.2. JMS Server Configuration") | String | unique name of the topic
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Using Masked Passwords in Configuration Files
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---------------------------------------------
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By default all passwords in Apache ActiveMQ server's configuration files are in
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plain text form. This usually poses no security issues as those files
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should be well protected from unauthorized accessing. However, in some
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circumstances a user doesn't want to expose its passwords to more eyes
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than necessary.
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Apache ActiveMQ can be configured to use 'masked' passwords in its
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configuration files. A masked password is an obscure string
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representation of a real password. To mask a password a user will use an
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'encoder'. The encoder takes in the real password and outputs the masked
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version. A user can then replace the real password in the configuration
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files with the new masked password. When Apache ActiveMQ loads a masked
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password, it uses a suitable 'decoder' to decode it into real password.
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Apache ActiveMQ provides a default password encoder and decoder. Optionally
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users can use or implement their own encoder and decoder for masking the
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passwords.
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### Password Masking in Server Configuration File
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#### The password masking property
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The server configuration file has a property that defines the default
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masking behaviors over the entire file scope.
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`mask-password`: this boolean type property indicates if a password
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should be masked or not. Set it to "true" if you want your passwords
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masked. The default value is "false".
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#### Specific masking behaviors
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##### cluster-password
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The nature of the value of cluster-password is subject to the value of
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property 'mask-password'. If it is true the cluster-password is masked.
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##### Passwords in connectors and acceptors
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In the server configuration, Connectors and Acceptors sometimes needs to
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specify passwords. For example if a users wants to use an SSL-enabled
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NettyAcceptor, it can specify a key-store-password and a
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trust-store-password. Because Acceptors and Connectors are pluggable
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implementations, each transport will have different password masking
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needs.
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When a Connector or Acceptor configuration is initialised, Apache ActiveMQ will
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add the "mask-password" and "password-codec" values to the Connector or
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Acceptors params using the keys `activemq.usemaskedpassword` and
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`activemq.passwordcodec` respectively. The Netty and InVM
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implementations will use these as needed and any other implementations
|
|
will have access to these to use if they so wish.
|
|
|
|
##### Passwords in Core Bridge configurations
|
|
|
|
Core Bridges are configured in the server configuration file and so the
|
|
masking of its 'password' properties follows the same rules as that of
|
|
'cluster-password'.
|
|
|
|
#### Examples
|
|
|
|
The following table summarizes the relations among the above-mentioned
|
|
properties
|
|
|
|
mask-password | cluster-password | acceptor/connector passwords | bridge password
|
|
:------------- | :---------------- | :--------------------------- | :---------------
|
|
absent | plain text | plain text | plain text
|
|
false | plain text | plain text | plain text
|
|
true | masked | masked | masked
|
|
|
|
Examples
|
|
|
|
Note: In the following examples if related attributed or properties are
|
|
absent, it means they are not specified in the configure file.
|
|
|
|
example 1
|
|
|
|
```xml
|
|
<cluster-password>bbc</cluster-password>
|
|
```
|
|
|
|
This indicates the cluster password is a plain text value ("bbc").
|
|
|
|
example 2
|
|
|
|
```xml
|
|
<mask-password>true</mask-password>
|
|
<cluster-password>80cf731af62c290</cluster-password>
|
|
```
|
|
|
|
This indicates the cluster password is a masked value and Apache ActiveMQ will
|
|
use its built-in decoder to decode it. All other passwords in the
|
|
configuration file, Connectors, Acceptors and Bridges, will also use
|
|
masked passwords.
|
|
|
|
### JMS Bridge password masking
|
|
|
|
The JMS Bridges are configured and deployed as separate beans so they
|
|
need separate configuration to control the password masking. A JMS
|
|
Bridge has two password parameters in its constructor, SourcePassword
|
|
and TargetPassword. It uses the following two optional properties to
|
|
control their masking:
|
|
|
|
`useMaskedPassword` -- If set to "true" the passwords are masked.
|
|
Default is false.
|
|
|
|
`passwordCodec` -- Class name and its parameters for the Decoder used to
|
|
decode the masked password. Ignored if `useMaskedPassword` is false. The
|
|
format of this property is a full qualified class name optionally
|
|
followed by key/value pairs, separated by semi-colons. For example:
|
|
|
|
```xml
|
|
<property name="useMaskedPassword">true</property>
|
|
<property name="passwordCodec">com.foo.FooDecoder;key=value</property>
|
|
```
|
|
|
|
Apache ActiveMQ will load this property and initialize the class with a
|
|
parameter map containing the "key"-\>"value" pair. If `passwordCodec` is
|
|
not specified, the built-in decoder is used.
|
|
|
|
### Masking passwords in ActiveMQ ResourceAdapters and MDB activation configurations
|
|
|
|
Both ra.xml and MDB activation configuration have a 'password' property
|
|
that can be masked. They are controlled by the following two optional
|
|
Resource Adapter properties in ra.xml:
|
|
|
|
`UseMaskedPassword` -- If setting to "true" the passwords are masked.
|
|
Default is false.
|
|
|
|
`PasswordCodec` -- Class name and its parameters for the Decoder used to
|
|
decode the masked password. Ignored if UseMaskedPassword is false. The
|
|
format of this property is a full qualified class name optionally
|
|
followed by key/value pairs. It is the same format as that for JMS
|
|
Bridges. Example:
|
|
|
|
```xml
|
|
<config-property>
|
|
<config-property-name>UseMaskedPassword</config-property-name>
|
|
<config-property-type>boolean</config-property-type>
|
|
<config-property-value>true</config-property-value>
|
|
</config-property>
|
|
<config-property>
|
|
<config-property-name>PasswordCodec</config-property-name>
|
|
<config-property-type>java.lang.String</config-property-type>
|
|
<config-property-value>com.foo.ADecoder;key=helloworld</config-property-value>
|
|
</config-property>
|
|
```
|
|
|
|
With this configuration, both passwords in ra.xml and all of its MDBs
|
|
will have to be in masked form.
|
|
|
|
### Masking passwords in activemq-users.properties
|
|
|
|
Apache ActiveMQ's built-in security manager uses plain properties files
|
|
where the user passwords are specified in plaintext forms by default. To
|
|
mask those parameters the following two properties need to be set
|
|
in the 'bootstrap.xml' file.
|
|
|
|
`mask-password` -- If set to "true" all the passwords are masked.
|
|
Default is false.
|
|
|
|
`password-codec` -- Class name and its parameters for the Decoder used
|
|
to decode the masked password. Ignored if `mask-password` is false. The
|
|
format of this property is a full qualified class name optionally
|
|
followed by key/value pairs. It is the same format as that for JMS
|
|
Bridges. Example:
|
|
|
|
```xml
|
|
<mask-password>true</mask-password>
|
|
<password-codec>org.apache.activemq.utils.DefaultSensitiveStringCodec;key=hello world</password-codec>
|
|
```
|
|
|
|
When so configured, the Apache ActiveMQ security manager will initialize a
|
|
DefaultSensitiveStringCodec with the parameters "key"-\>"hello world",
|
|
then use it to decode all the masked passwords in this configuration
|
|
file.
|
|
|
|
### Choosing a decoder for password masking
|
|
|
|
As described in the previous sections, all password masking requires a
|
|
decoder. A decoder uses an algorithm to convert a masked password into
|
|
its original clear text form in order to be used in various security
|
|
operations. The algorithm used for decoding must match that for
|
|
encoding. Otherwise the decoding may not be successful.
|
|
|
|
For user's convenience Apache ActiveMQ provides a default built-in Decoder.
|
|
However a user can if they so wish implement their own.
|
|
|
|
#### The built-in Decoder
|
|
|
|
Whenever no decoder is specified in the configuration file, the built-in
|
|
decoder is used. The class name for the built-in decoder is
|
|
org.apache.activemq.utils.DefaultSensitiveStringCodec. It has both
|
|
encoding and decoding capabilities. It uses java.crypto.Cipher utilities
|
|
to encrypt (encode) a plaintext password and decrypt a mask string using
|
|
same algorithm. Using this decoder/encoder is pretty straightforward. To
|
|
get a mask for a password, just run the following in command line:
|
|
|
|
```sh
|
|
java org.apache.activemq.utils.DefaultSensitiveStringCodec "your plaintext password"
|
|
```
|
|
|
|
Make sure the classpath is correct. You'll get something like
|
|
|
|
```
|
|
Encoded password: 80cf731af62c290
|
|
```
|
|
|
|
Just copy "80cf731af62c290" and replace your plaintext password with it.
|
|
|
|
#### Using a different decoder
|
|
|
|
It is possible to use a different decoder rather than the built-in one.
|
|
Simply make sure the decoder is in Apache ActiveMQ's classpath and configure
|
|
the server to use it as follows:
|
|
|
|
```xml
|
|
<password-codec>com.foo.SomeDecoder;key1=value1;key2=value2</password-codec>
|
|
```
|
|
|
|
If your decoder needs params passed to it you can do this via key/value
|
|
pairs when configuring. For instance if your decoder needs say a
|
|
"key-location" parameter, you can define like so:
|
|
|
|
```xml
|
|
<password-codec>com.foo.NewDecoder;key-location=/some/url/to/keyfile</password-codec>
|
|
```
|
|
|
|
Then configure your cluster-password like this:
|
|
|
|
```xml
|
|
<mask-password>true</mask-password>
|
|
<cluster-password>masked_password</cluster-password>
|
|
```
|
|
|
|
When Apache ActiveMQ reads the cluster-password it will initialize the
|
|
NewDecoder and use it to decode "mask\_password". It also process all
|
|
passwords using the new defined decoder.
|
|
|
|
#### Implementing your own codecs
|
|
|
|
To use a different decoder than the built-in one, you either pick one
|
|
from existing libraries or you implement it yourself. All decoders must
|
|
implement the `org.apache.activemq.utils.SensitiveDataCodec<T>`
|
|
interface:
|
|
|
|
``` java
|
|
public interface SensitiveDataCodec<T>
|
|
{
|
|
T decode(Object mask) throws Exception;
|
|
|
|
void init(Map<String, String> params);
|
|
}
|
|
```
|
|
|
|
This is a generic type interface but normally for a password you just
|
|
need String type. So a new decoder would be defined like
|
|
|
|
```java
|
|
public class MyNewDecoder implements SensitiveDataCodec<String>
|
|
{
|
|
public String decode(Object mask) throws Exception
|
|
{
|
|
//decode the mask into clear text password
|
|
return "the password";
|
|
}
|
|
|
|
public void init(Map<String, String> params)
|
|
{
|
|
//initialization done here. It is called right after the decoder has been created.
|
|
}
|
|
}
|
|
```
|
|
|
|
Last but not least, once you get your own decoder, please add it to the
|
|
classpath. Otherwise Apache ActiveMQ will fail to load it!
|