| /* |
| * 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.logging.log4j.util; |
| |
| import org.apache.logging.log4j.message.Message; |
| |
| /** |
| * Classes implementing this interface know how to supply {@link Message}s. |
| * |
| * <p>This is a <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/package-summary.html">functional |
| * interface</a> intended to support lambda expressions in log4j 2. |
| * |
| * <p>Implementors are free to cache values or return a new or distinct value each time the supplier is invoked. |
| * |
| * <p><strong>DEPRECATED:</strong> this class should not normally be used outside a Java 8+ lambda syntax. Instead, |
| * {@link Supplier Supplier<Message>} should be used as an anonymous class. Both this and {@link Supplier} will be |
| * removed in 3.0. |
| * </p> |
| * |
| * @since 2.4 |
| */ |
| public interface MessageSupplier { |
| |
| /** |
| * Gets a Message. |
| * |
| * @return a Message |
| */ |
| Message get(); |
| } |