Update #0 - First Release

sources/main/java/javax/annotation/concurrent/GuardedBy.java

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+/*
+ * Copyright (c) 2005 Brian Goetz
+ * Released under the Creative Commons Attribution License
+ *   (http://creativecommons.org/licenses/by/2.5)
+ * Official home: http://www.jcip.net
+ */
+package javax.annotation.concurrent;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The field or method to which this annotation is applied can only be accessed
+ * when holding a particular lock, which may be a built-in (synchronization)
+ * lock, or may be an explicit {@link java.util.concurrent.locks.Lock}.
+ * <p>
+ * The argument determines which lock guards the annotated field or method:
+ * <ul>
+ * <li>this : The string literal "this" means that this field is guarded by the
+ * class in which it is defined.
+ * <li>class-name.this : For inner classes, it may be necessary to disambiguate
+ * 'this'; the class-name.this designation allows you to specify which 'this'
+ * reference is intended
+ * <li>itself : For reference fields only; the object to which the field refers.
+ * <li>field-name : The lock object is referenced by the (instance or static)
+ * field specified by field-name.
+ * <li>class-name.field-name : The lock object is reference by the static field
+ * specified by class-name.field-name.
+ * <li>method-name() : The lock object is returned by calling the named nil-ary
+ * method.
+ * <li>class-name.class : The Class object for the specified class should be
+ * used as the lock object.
+ * </ul>
+ */
+@Target({ ElementType.FIELD, ElementType.METHOD })
+@Retention(RetentionPolicy.CLASS)
+public @interface GuardedBy {
+	String value();
+}

sources/main/java/javax/annotation/concurrent/Immutable.java

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+/*
+ * Copyright (c) 2005 Brian Goetz
+ * Released under the Creative Commons Attribution License
+ *   (http://creativecommons.org/licenses/by/2.5)
+ * Official home: http://www.jcip.net
+ */
+package javax.annotation.concurrent;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The class to which this annotation is applied is immutable. This means that
+ * its state cannot be seen to change by callers. Of necessity this means that
+ * all public fields are final, and that all public final reference fields refer
+ * to other immutable objects, and that methods do not publish references to any
+ * internal state which is mutable by implementation even if not by design.
+ * Immutable objects may still have internal mutable state for purposes of
+ * performance optimization; some state variables may be lazily computed, so
+ * long as they are computed from immutable state and that callers cannot tell
+ * the difference.
+ * <p>
+ * Immutable objects are inherently thread-safe; they may be passed between
+ * threads or published without synchronization.
+ */
+@Documented
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.CLASS)
+public @interface Immutable {
+}

sources/main/java/javax/annotation/concurrent/NotThreadSafe.java

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+/*
+ * Copyright (c) 2005 Brian Goetz
+ * Released under the Creative Commons Attribution License
+ *   (http://creativecommons.org/licenses/by/2.5)
+ * Official home: http://www.jcip.net
+ */
+package javax.annotation.concurrent;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The class to which this annotation is applied is not thread-safe. This
+ * annotation primarily exists for clarifying the non-thread-safety of a class
+ * that might otherwise be assumed to be thread-safe, despite the fact that it
+ * is a bad idea to assume a class is thread-safe without good reason.
+ * 
+ * @see ThreadSafe
+ */
+@Documented
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.CLASS)
+public @interface NotThreadSafe {
+}

sources/main/java/javax/annotation/concurrent/ThreadSafe.java

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+/*
+ * Copyright (c) 2005 Brian Goetz
+ * Released under the Creative Commons Attribution License
+ *   (http://creativecommons.org/licenses/by/2.5)
+ * Official home: http://www.jcip.net
+ */
+package javax.annotation.concurrent;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The class to which this annotation is applied is thread-safe. This means that
+ * no sequences of accesses (reads and writes to public fields, calls to public
+ * methods) may put the object into an invalid state, regardless of the
+ * interleaving of those actions by the runtime, and without requiring any
+ * additional synchronization or coordination on the part of the caller.
+ *
+ * @see NotThreadSafe
+ */
+@Documented
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.CLASS)
+public @interface ThreadSafe {
+}