ClusterServiceFactoryProducer.java

/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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.uberfire.backend.server.cluster;

import java.util.concurrent.atomic.AtomicBoolean;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.inject.Named;

import org.uberfire.commons.cluster.ClusterServiceFactory;
import org.uberfire.commons.services.cdi.Startup;
import org.uberfire.commons.services.cdi.StartupType;

@ApplicationScoped
@Startup(StartupType.BOOTSTRAP)
public class ClusterServiceFactoryProducer {

    private final ClusterServiceFactory factory;
    private AtomicBoolean initialized = new AtomicBoolean(false);

    ClusterServiceFactoryProducer() {
        this.factory = buildFactory();
    }

    ClusterServiceFactory buildFactory() {
        return ClusterServiceFactorySetup.buildFactory();
    }

    @Produces
    @Named("clusterServiceFactory")
    public synchronized ClusterServiceFactory clusterServiceFactory() {
        if (factory != null && !initialized.getAndSet(true)) {
            factory.build(null);
        }
        return factory;
    }
}