CODEWITHSUNDEEP
javacollectionsjmx
Tchypp
Tchypp

Reputation: 1105

Collections via MXBeans

I need to define and implement an MXBean interface. One of the methods would return a Collection. This seems to be not supported by MXBeans. I get an OpenDataException saying "Cannot convert type: java.util.Collection". If I change it to List or Set then it works.

I have not found any documentation saying that Collections are not supported and this is why I am asking you experts. Do I miss something ?

Upvotes: 3

Views: 2263

Answers (2)

Laurent Legrand
Laurent Legrand

Reputation: 1144

The javadoc of the MXBean annotation describes in detail the mapping rules. List, Set, SortedSet are supported but not Collection.

Upvotes: 4

Andrey Adamovich
Andrey Adamovich

Reputation: 20663

Specification does not say it supports Java collections:

The following list specifies all data types that are allowed as scalars or as anydimensional arrays in open MBeans:

  • java.lang.Void
  • java.lang.Short
  • java.lang.Boolean
  • java.lang.Integer
  • java.lang.Byte
  • java.lang.Long
  • java.lang.Character
  • java.lang.Float
  • java.lang.String
  • java.lang.Double
  • java.math.BigDecimal
  • java.math.BigInteger
  • java.util.Date
  • javax.management.ObjectName
  • javax.management.openmbean.CompositeData (interface)
  • javax.management.openmbean.TabularData (interface)

You can use either arrays or TabularData.

Upvotes: 1

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