org.apache.logging.log4j.util.MessageSupplier Maven / Gradle / Ivy
/*
* 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.
*
* This is a functional
* interface intended to support lambda expressions in log4j 2.
*
*
Implementors are free to cache values or return a new or distinct value each time the supplier is invoked.
*
*
DEPRECATED: this class should not normally be used outside a Java 8+ lambda syntax. Instead,
* {@link Supplier Supplier} should be used as an anonymous class. Both this and {@link Supplier} will be
* removed in 3.0.
*
*
* @since 2.4
*/
public interface MessageSupplier {
/**
* Gets a Message.
*
* @return a Message
*/
Message get();
}