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38 lines
882 B
XML
38 lines
882 B
XML
<!DOCTYPE qhelp PUBLIC
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"-//Semmle//qhelp//EN"
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"qhelp.dtd">
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<qhelp>
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<overview>
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<p>
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The Enterprise JavaBeans 3.0 core specification, Section 21.1.2, states:
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</p>
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<blockquote>
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<p>
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An enterprise bean must not use read/write static fields. Using read-only static fields is
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allowed. Therefore, it is recommended that all static fields in the enterprise bean class be
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declared as final.
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</p>
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<p>
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This rule is required to ensure consistent runtime semantics because while some EJB containers may
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use a single JVM to execute all enterprise bean's instances, others may distribute the instances across
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multiple JVMs.
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</p>
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</blockquote>
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</overview>
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<references>
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<li>
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<a href="http://jcp.org/aboutJava/communityprocess/final/jsr220/index.html">
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JSR-220 Enterprise JavaBeans 3.0 Final Release</a> (ejbcore),
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Section 21.1.2 Programming Restrictions
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</li>
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</references>
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</qhelp>
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