Introduce @Blocking and @nonblocking

common/src/main/java/org/jetbrains/annotations/Blocking.java

@@ -0,0 +1,20 @@
+package org.jetbrains.annotations;
+
+import java.lang.annotation.*;
+
+/**
+ * Indicates that the annotated method is inherently blocking and should not be executed in a non-blocking context.
+ * <p>
+ * When this annotation is used on a {@code class}, all the methods declared by the annotated class are considered
+ * <em>blocking</em>.
+ * <p>
+ * Apart from documentation purposes this annotation is intended to be used by static analysis tools to validate against
+ * probable runtime errors and element contract violations.
+ *
+ * @since 22.0.0
+ */
+@Documented
+@Retention(RetentionPolicy.CLASS)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE})
+public @interface Blocking {
+}

common/src/main/java/org/jetbrains/annotations/NonBlocking.java

@@ -0,0 +1,20 @@
+package org.jetbrains.annotations;
+
+import java.lang.annotation.*;
+
+/**
+ * Indicates that the annotated method is inherently non-blocking and can be executed in a non-blocking context.
+ * <p>
+ * When this annotation is used on a {@code class}, all the methods declared by the annotated class are considered
+ * <em>non-blocking</em>.
+ * <p>
+ * Apart from documentation purposes this annotation is intended to be used by static analysis tools to validate against
+ * probable runtime errors and contract violations.
+ *
+ * @since 22.0.0
+ */
+@Documented
+@Retention(RetentionPolicy.CLASS)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE})
+public @interface NonBlocking {
+}

gradle.properties

@@ -14,5 +14,5 @@
 # limitations under the License.
 #
 
-projectVersion=21.0.1
+projectVersion=22.0.0
 #JDK_5=<path-to-older-java-version>