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/*
 * Copyright 2024 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.slf4j.impl;

import org.slf4j.ILoggerFactory;
import org.slf4j.helpers.NOPLoggerFactory;
import org.slf4j.spi.LoggerFactoryBinder;

/**
 * Apache Calcite has a dependency on the {@code slf4j-api} artifact. Due to JAR
 * hell in the runtime, we shade and relocate the {@code slf4j-api} library into
 * the {@code com.hazelcast} package during build.
 * 

* SLF4J requires exactly one {@code StaticLoggerBinder} class to be in the JVM * classpath. Otherwise, a warning is printed into the {@code System.err} * unconditionally. See {@link LoggerFactory#bind} for more details. *

* This class helps us get rid of the warning. During relocation both this class and * {@code LoggerFactory} are moved to the {@code com.hazelcast} package. As a result * the relocated factory finds the relocated binder and no warning is produced. *

* At the same time, the normal SLF4J dependency still looks for the binder at the * usual location, and therefore other runtime classes that use SLF4J are not affected. * That is, the current binder affects only the relocated Apache Calcite classes. *

* The binder delegates to the no-op logger factory, suppressing all messages * from the relocated Apache Calcite. */ public class StaticLoggerBinder implements LoggerFactoryBinder { private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder(); public static StaticLoggerBinder getSingleton() { return SINGLETON; } @Override public ILoggerFactory getLoggerFactory() { return new NOPLoggerFactory(); } @Override public String getLoggerFactoryClassStr() { return NOPLoggerFactory.class.getName(); } }





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