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19.8. MBeans

An MBean represents a manageable resource such as a service, component, device or an application.
Red Hat JBoss Data Grid provides MBeans that monitor and manage multiple aspects. For example, MBeans that provide statistics on the transport layer are provided. If a JBoss Data Grid server is configured with JMX statistics, an MBean that provides information such as the hostname, port, bytes read, bytes written and the number of worker threads exists at the following location: 
jboss.infinispan:type=Server,name=<Memcached|Hotrod>,component=Transport
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Note

A full list of available MBeans, their supported operations and attributes, is available in the Appendix
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19.8.1. Understanding MBeans
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When JMX reporting is enabled at either the Cache Manager or Cache level, use a standard JMX GUI such as JConsole or VisualVM to connect to a Java Virtual Machine running Red Hat JBoss Data Grid. When connected, the following MBeans are available:
  • If Cache Manager-level JMX statistics are enabled, an MBean named jboss.infinispan:type=CacheManager,name="DefaultCacheManager" exists, with properties specified by the Cache Manager MBean.
  • If the cache-level JMX statistics are enabled, multiple MBeans display depending on the configuration in use. For example, if a write behind cache store is configured, an MBean that exposes properties that belong to the cache store component is displayed. All cache-level MBeans use the same format: 
    jboss.infinispan:type=Cache,name="<name-of-cache>(<cache-mode>)",manager="<name-of-cache-manager>",component=<component-name>
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    In this format:
    • Specify the default name for the cache using the cache-container element's default-cache attribute.
    • The cache-mode is replaced by the cache mode of the cache. The lower case version of the possible enumeration values represents the cache mode.
    • The component-name is replaced by one of the JMX component names from the JMX reference documentation.
As an example, the cache store JMX component MBean for a default cache configured for synchronous distribution would be named as follows: 
jboss.infinispan:type=Cache,name="default(dist_sync)", manager="default",component=CacheStore
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Each cache and cache manager name is within quotation marks to prevent the use of unsupported characters in these user-defined names.
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