cluster-leader-election/src/main/java/org/acme/master/ClusterLockProducer.java

/*
 * 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.acme.master;

import java.util.concurrent.TimeUnit;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;

import org.apache.camel.CamelContext;
import org.apache.camel.cluster.CamelClusterService;
import org.apache.camel.component.file.cluster.FileLockClusterService;
import org.apache.camel.component.kubernetes.cluster.KubernetesClusterService;
import org.eclipse.microprofile.config.inject.ConfigProperty;

@ApplicationScoped
public class ClusterLockProducer {

    @ConfigProperty(name = "cluster.leader.election.root.folder", defaultValue = "target/cluster")
    String rootFolder;

    @Produces
    public CamelClusterService clusterService(CamelContext camelContext) {
        String kubernetesNamespace = System.getenv("KUBERNETES_NAMESPACE");
        if (kubernetesNamespace != null) {
            KubernetesClusterService service = new KubernetesClusterService();
            service.setKubernetesNamespace(kubernetesNamespace);
            return service;
        } else {
            FileLockClusterService service = new FileLockClusterService();
            service.setRoot(rootFolder);
            service.setAcquireLockDelay(1, TimeUnit.SECONDS);
            service.setAcquireLockInterval(1, TimeUnit.SECONDS);
            return service;
        }
    }

}