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package org.glassfish.admin.amx.core;
import java.lang.annotation.Documented;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Target;
/**
Holds meta information useful in generating and/or supplementing the default
MBeanInfo as well as other runtime fields or optimizations.
Depending on how the implementor generates MBeans, not all of this information is
necessarily used; it could be ignored if there is a more authoritative source (eg
internal @Configured interfaces that also have AMXConfig proxy interfaces).
<p>
In general, this annotation is used only by amx-core, amx-config and related built-in
AMX modules.
@author Lloyd Chambers
*/
@Retention(RUNTIME)
@Target({TYPE, ANNOTATION_TYPE})
@Documented
@org.glassfish.external.arc.Taxonomy(stability = org.glassfish.external.arc.Stability.UNCOMMITTED)
public @interface AMXMBeanMetadata {
/**
If true, states that the MBeanInfo is immutable; that once MBeanInfo is
obtained it may be cached, avoiding needless/repeated invocations of getMBeanInfo().
Very few MBeans have mutable MBeanInfo, so this defaults to 'true'.
The term is a misnomer; it should be invariantMBeanInfo(), but this name
is used go be consistent with the JMX standard.
*/
boolean immutableMBeanInfo() default true;
public static final String NULL = "\u0000";
/** overrides default type to be used in ObjectName=, ignored if null or empty */
public String type() default NULL;
/** If true, no children are allowed. */
public boolean leaf() default false;
/** if true, the MBean is a singleon within its parent's scope */
public boolean singleton() default false;
/** if true, the MBean is a global singleton, unique in type among all AMX MBeans.
Being a globalSingleton implies being a singleton
*/
public boolean globalSingleton() default false;
}