CustomHazelcastInstanceFactory.java

/*
 * Copyright 2023 Global Crop Diversity Trust
 *
 * Licensed 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.genesys.spring.hazelcast;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.hibernate.CacheEnvironment;
import com.hazelcast.hibernate.instance.DefaultHazelcastInstanceFactory;
import com.hazelcast.hibernate.instance.IHazelcastInstanceFactory;
import com.hazelcast.hibernate.instance.IHazelcastInstanceLoader;
import org.hibernate.cache.CacheException;

import java.util.Properties;

public class CustomHazelcastInstanceFactory implements IHazelcastInstanceFactory {

	private static final String HZ_CLIENT_LOADER_CLASSNAME = "com.hazelcast.hibernate.instance.HazelcastClientLoader";
	
	private static HazelcastInstance hazelcastInstance;

	public static void setHazelcastInstance(HazelcastInstance hazelcastInstance) {
		CustomHazelcastInstanceFactory.hazelcastInstance = hazelcastInstance;
	}

	public IHazelcastInstanceLoader createInstanceLoader(final Properties props) throws CacheException {
		try {
			if (props != null && CacheEnvironment.isNativeClient(props)) {
				ClassLoader cl = DefaultHazelcastInstanceFactory.class.getClassLoader();
				var loaderClass = cl.loadClass(HZ_CLIENT_LOADER_CLASSNAME);
				IHazelcastInstanceLoader instanceLoader = (IHazelcastInstanceLoader) loaderClass.newInstance();
				instanceLoader.configure(props);
				return instanceLoader;
			} else {
				return new IHazelcastInstanceLoader() {

					private boolean shutDown;
					
					@Override
					public void configure(Properties props) {
						this.shutDown = CacheEnvironment.shutdownOnStop(props, true);
					}

					@Override
					public HazelcastInstance loadInstance() throws CacheException {
						return hazelcastInstance;
					}

					@Override
					public void unloadInstance() throws CacheException {
						if (!shutDown) {
							return;
						}
						try {
							hazelcastInstance.getLifecycleService().shutdown();
						} catch (Exception e) {
							throw new CacheException(e);
						}
					}
				};
			}
		} catch (Exception e) {
			throw new CacheException(e);
		}
	}
}