Add TriConsumer; provenance Apache Log4j 2.7, and enhanced with

andThen().

src/changes/changes.xml

@@ -51,6 +51,7 @@ The <action> type attribute can be add,update,fix,remove.
     <action issue="LANG-1646" type="fix" dev="aherbert" due-to="Alex Herbert">NumberUtils.createNumber to return requested floating point type for zero.</action>
     <!-- ADD -->
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add EnumUtils.getEnumSystemProperty(...).</action>
+    <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add TriConsumer.</action>
   </release>
 
   <release version="3.12.0" date="2021-02-26" description="New features and bug fixes (Java 8).">

src/main/java/org/apache/commons/lang3/function/TriConsumer.java

@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.function;
+
+import java.util.Objects;
+import java.util.function.Consumer;
+
+/**
+ * Represents an operation that accepts three input arguments and returns no result. This is the three-arity
+ * specialization of {@link Consumer}. Unlike most other functional interfaces, {@code TriConsumer} is expected to
+ * operate via side-effects.
+ *
+ * <p>
+ * This is a {@link FunctionalInterface} whose functional method is {@link #accept(Object, Object, Object)}.
+ * </p>
+ * <p>
+ * Provenance: Apache Log4j 2.7
+ * </p>
+ *
+ * @param <T> type of the first argument
+ * @param <U> type of the second argument
+ * @param <V> type of the third argument
+ * @since 3.13.0
+ */
+@FunctionalInterface
+public interface TriConsumer<T, U, V> {
+
+    /**
+     * Performs the operation given the specified arguments.
+     *
+     * @param k the first input argument
+     * @param v the second input argument
+     * @param s the third input argument
+     */
+    void accept(T k, U v, V s);
+
+    /**
+     * Returns a composed {@code TriConsumer} that performs, in sequence, this operation followed by the {@code after}
+     * operation. If performing either operation throws an exception, it is relayed to the caller of the composed
+     * operation. If performing this operation throws an exception, the {@code after} operation will not be performed.
+     *
+     * @param after the operation to perform after this operation.
+     * @return a composed {@code TriConsumer} that performs in sequence this operation followed by the {@code after}
+     *         operation.
+     * @throws NullPointerException if {@code after} is null.
+     */
+    default TriConsumer<T, U, V> andThen(final TriConsumer<? super T, ? super U, ? super V> after) {
+        Objects.requireNonNull(after);
+
+        return (t, u, v) -> {
+            accept(t, u, v);
+            after.accept(t, u, v);
+        };
+    }
+
+}

src/test/java/org/apache/commons/lang3/function/TriConsumerTest.java

@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests {@linkTriConsumer}.
+ */
+public class TriConsumerTest {
+
+    @Test
+    public void testAccept() throws Throwable {
+        final AtomicReference<Character> ref1 = new AtomicReference<>();
+        final AtomicReference<Short> ref2 = new AtomicReference<>();
+        final AtomicReference<String> ref3 = new AtomicReference<>();
+        final TriConsumer<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>> tri = (t, u,
+            v) -> {
+            ref1.set(Character.valueOf('a'));
+            ref2.set(Short.valueOf((short) 1));
+            ref3.set("z");
+        };
+        tri.accept(ref1, ref2, ref3);
+        assertEquals(Character.valueOf('a'), ref1.get());
+        assertEquals(Short.valueOf((short) 1), ref2.get());
+        assertEquals("z", ref3.get());
+    }
+
+    @Test
+    public void testAndThen() throws Throwable {
+        final AtomicReference<Character> ref1 = new AtomicReference<>();
+        final AtomicReference<Short> ref2 = new AtomicReference<>();
+        final AtomicReference<String> ref3 = new AtomicReference<>();
+        final TriConsumer<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>> tri = (t, u,
+            v) -> {
+            ref1.set(Character.valueOf('a'));
+            ref2.set(Short.valueOf((short) 1));
+            ref3.set("z");
+        };
+        final TriConsumer<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>> triAfter = (t, u,
+            v) -> {
+            ref1.set(Character.valueOf('b'));
+            ref2.set(Short.valueOf((short) 2));
+            ref3.set("zz");
+        };
+        tri.andThen(triAfter).accept(ref1, ref2, ref3);
+        assertEquals(Character.valueOf('b'), ref1.get());
+        assertEquals(Short.valueOf((short) 2), ref2.get());
+        assertEquals("zz", ref3.get());
+    }
+
+}