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/*
* Copyright © 2018-2019 AT&T Intellectual Property.
*
* 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.onap.ccsdk.cds.blueprintsprocessor.core.service
import org.onap.ccsdk.cds.blueprintsprocessor.core.cluster.BlueprintClusterTopic
import org.springframework.context.ApplicationEvent
import java.time.Duration
import java.util.Properties
import java.util.UUID
interface BlueprintClusterService {
/** Start the cluster with [clusterInfo], By default clustering service is disabled.
* Application module has to start cluster */
suspend fun <T> startCluster(configuration: T)
fun clusterJoined(): Boolean
fun isClient(): Boolean
fun isLiteMember(): Boolean
/** Returns [partitionGroup] master member */
suspend fun masterMember(partitionGroup: String): ClusterMember
/** Returns all the data cluster members */
suspend fun allMembers(): Set<ClusterMember>
/**
* Returns application cluster members for [appName] joined as server or lite member,
* Node joined as client won't be visible. Here the assumption is node-id is combination of
* application id and replica number, for an example Application cds-cluster then the node ids will be
* cds-cluster-1, cds-cluster-2, cds-cluster-3
*/
suspend fun applicationMembers(appName: String): Set<ClusterMember>
/** Create and get or get the distributed data map store with [name] */
suspend fun <T> clusterMapStore(name: String): MutableMap<String, T>
/** Create and get the distributed lock with [name] */
suspend fun clusterLock(name: String): ClusterLock
/** Shut down the cluster with [duration] */
suspend fun shutDown(duration: Duration)
/** Send [message] to the listener(s) of a [topic] */
suspend fun <T> sendMessage(topic: BlueprintClusterTopic, message: T)
/** Register a [listener] to a [topic] and returns his UUID */
fun <T> addBlueprintClusterMessageListener(topic: BlueprintClusterTopic, listener: BlueprintClusterMessageListener<T>): UUID
/** Unregister a listener from a [topic] using his [uuid] and returns true if it succeeded */
fun removeBlueprintClusterMessageListener(topic: BlueprintClusterTopic, uuid: UUID): Boolean
}
data class ClusterInfo(
val id: String,
val nodeId: String,
var joinAsClient: Boolean = false,
var properties: Properties?,
var configFile: String
)
data class ClusterMember(
val id: String,
val name: String,
val memberAddress: String?,
val state: String? = null
)
interface ClusterLock {
fun name(): String
suspend fun lock()
suspend fun fenceLock(): String
suspend fun tryLock(timeout: Long): Boolean
suspend fun tryFenceLock(timeout: Long): String
suspend fun unLock()
fun isLocked(): Boolean
fun isLockedByCurrentThread(): Boolean
fun close()
}
class BlueprintClusterMessage<E>(val topic: BlueprintClusterTopic, val payload: E, publishTime: Long, clusterMember: ClusterMember)
interface BlueprintClusterMessageListener<E> {
fun onMessage(message: BlueprintClusterMessage<E>?)
}
class ClusterJoinedEvent(source: Any) : ApplicationEvent(source)
const val CDS_LOCK_GROUP = "cds-lock"
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