org.apache.logging.log4j.util.ProviderActivator 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 java.util.Hashtable;
import org.apache.logging.log4j.spi.Provider;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
/**
* Utility class to register Log4j2 providers in an OSGI environment.
*/
public abstract class ProviderActivator implements BundleActivator {
public static final String API_VERSION = "APIVersion";
private final Provider provider;
private ServiceRegistration providerRegistration = null;
protected ProviderActivator(final Provider provider) {
this.provider = provider;
}
@Override
public void start(final BundleContext context) throws Exception {
final Hashtable props = new Hashtable<>();
props.put(API_VERSION, provider.getVersions());
providerRegistration = context.registerService(Provider.class, provider, props);
}
@Override
public void stop(BundleContext context) throws Exception {
if (providerRegistration != null) {
providerRegistration.unregister();
}
}
}