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Similarly, it is inappropriate to start threads from constructors. (See guideline TSM01-J. Do not let the "(this" ) reference escape during object construction for more information). Creating timers that perform recurring tasks and starting those timers from within code responsible for initialization introduces liveness issues.
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<ac:structured-macro ac:name="anchor" ac:schema-version="1" ac:macro-id="9d2d7d1fb085c6ac-9a259526-40b64168-8bcd8ab9-191b49185dcd6cd700ac2a56"><ac:parameter ac:name="">CON20-EX1</ac:parameter></ac:structured-macro> *TSM02-EX1:* It is permissible to start a background thread during class initialization provided the thread does not access any fields. For example, the {{ObjectPreserver}} class (based on \[[Patterns 2002|AA. Java References#Patterns 02]\]) shown below provides a mechanism for storing object references, which prevents an object from being garbage-collected, even if the object is not de-referenced in the future. |
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