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/*
 * 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 brooklyn.entity.nosql.etcd;

import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

import brooklyn.catalog.Catalog;
import brooklyn.config.ConfigKey;
import brooklyn.entity.Entity;
import brooklyn.entity.basic.ConfigKeys;
import brooklyn.entity.group.DynamicCluster;
import brooklyn.entity.proxying.EntitySpec;
import brooklyn.entity.proxying.ImplementedBy;
import brooklyn.event.AttributeSensor;
import brooklyn.event.basic.AttributeSensorAndConfigKey;
import brooklyn.event.basic.Sensors;
import brooklyn.util.flags.SetFromFlag;

import com.google.common.reflect.TypeToken;

@Catalog(name="Etcd Cluster", description="Etcd is an open-source distributed key-value store that serves as "
        + "the backbone of distributed systems by providing a canonical hub for cluster coordination and state management.")
@ImplementedBy(EtcdClusterImpl.class)
public interface EtcdCluster extends DynamicCluster {

    @SuppressWarnings("serial")
    AttributeSensor> ETCD_CLUSTER_NODES = Sensors.newSensor(
            new TypeToken>() {}, 
            "etcd.cluster.nodes", "Names of all active etcd nodes in the cluster (entity reference to name mapping)");

    @SetFromFlag("clusterName")
    ConfigKey CLUSTER_NAME = ConfigKeys.newStringConfigKey("etcd.cluster.name", "The Etcd cluster name", "brooklyn");

    @SetFromFlag("clusterToken")
    ConfigKey CLUSTER_TOKEN = ConfigKeys.newStringConfigKey("etcd.cluster.token", "The Etcd cluster token", "brooklyn");

    @SetFromFlag("etcdNodeSpec")
    AttributeSensorAndConfigKey,EntitySpec> ETCD_NODE_SPEC = ConfigKeys.newSensorAndConfigKey(
            new TypeToken>() { }, "etcd.node.spec", "Etcd node specification");

    AttributeSensor NODE_ID = Sensors.newSensor(AtomicInteger.class, "etcd.cluster.nodeId", "Counter for generating node IDs");

    AttributeSensor IS_FIRST_NODE_SET = Sensors.newBooleanSensor("etcd.cluster.isFirstNodeSet", "Flag to determine if the first node has been set");

    AttributeSensor FIRST_NODE = Sensors.newSensor(Entity.class, "etcd.cluster.firstNode", "The first node in the cluster");

    AttributeSensor NODE_LIST = Sensors.newStringSensor("etcd.cluster.nodeList", "List of nodes (including ports), comma separated");
}