org.enodeframework.eventing.ProcessingEventMailBox.kt Maven / Gradle / Ivy
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The enodeframework core implementation.
package org.enodeframework.eventing
import org.enodeframework.common.exception.MailBoxProcessException
import org.enodeframework.common.function.Action1
import org.enodeframework.common.io.Task
import org.slf4j.LoggerFactory
import java.util.*
import java.util.concurrent.CompletableFuture
import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.Executor
import java.util.concurrent.atomic.AtomicInteger
import java.util.stream.Collectors
class ProcessingEventMailBox(aggregateRootTypeName: String, aggregateRootId: String, handleProcessingEventAction: Action1, private val executor: Executor) {
private val lockObj = Any()
val aggregateRootId: String
val aggregateRootTypeName: String
private val isUsing = AtomicInteger(0)
private val isRemoved = AtomicInteger(0)
private val isRunning = AtomicInteger(0)
private var waitingProcessingEventDict = ConcurrentHashMap()
private var processingEventQueue: ConcurrentLinkedQueue
private var handleProcessingEventAction: Action1
private var lastActiveTime: Date
private var nextExpectingEventVersion: Int? = null
private fun tryRemovedInvalidWaitingMessages(version: Int) {
waitingProcessingEventDict.keys.stream().filter { x: Int -> x < version }.forEach { key: Int ->
if (waitingProcessingEventDict.containsKey(key)) {
val processingEvent = waitingProcessingEventDict.remove(key)
processingEvent!!.complete()
logger.warn("{} invalid waiting message removed, aggregateRootType: {}, aggregateRootId: {}, commandId: {}, eventVersion: {}, eventStreamId: {}, eventTypes: {}, eventIds: {}, nextExpectingEventVersion: {}",
javaClass.name,
processingEvent.message.getAggregateRootTypeName(),
processingEvent.message.getAggregateRootId(),
processingEvent.message.commandId,
processingEvent.message.getVersion(),
processingEvent.message.id,
processingEvent.message.events.stream().map { x: IDomainEvent<*> -> x.javaClass.name }.collect(Collectors.joining("|")),
processingEvent.message.events.stream().map { obj: IDomainEvent<*> -> obj.id }.collect(Collectors.joining("|")),
version)
}
}
}
private fun tryEnqueueValidWaitingMessage() {
if (nextExpectingEventVersion == null) {
return
}
while (waitingProcessingEventDict.containsKey(nextExpectingEventVersion)) {
val nextProcessingEvent = waitingProcessingEventDict.remove(nextExpectingEventVersion)
if (nextProcessingEvent != null) {
enqueueEventStream(nextProcessingEvent)
logger.info("{} enqueued waiting processingEvent, aggregateRootId: {}, aggregateRootTypeName: {}, eventVersion: {}", javaClass.name, aggregateRootId, aggregateRootTypeName, nextProcessingEvent.message.getVersion())
}
}
}
fun getTotalUnHandledMessageCount(): Int {
return processingEventQueue.size
}
fun setNextExpectingEventVersion(version: Int) {
synchronized(lockObj) {
tryRemovedInvalidWaitingMessages(version)
if (nextExpectingEventVersion == null || version > this.nextExpectingEventVersion!!) {
nextExpectingEventVersion = version
logger.info("{} refreshed nextExpectingEventVersion, aggregateRootId: {}, aggregateRootTypeName: {}, version: {}", javaClass.name, aggregateRootId, aggregateRootTypeName, nextExpectingEventVersion)
tryEnqueueValidWaitingMessage()
lastActiveTime = Date()
tryRun()
} else if (version == this.nextExpectingEventVersion){
val processingEvent = waitingProcessingEventDict.get(nextExpectingEventVersion)
logger.info("{} equals nextExpectingEventVersion ignored, aggregateRootId: {}, aggregateRootTypeName: {}, version: {}, current nextExpectingEventVersion: {}", javaClass.name, aggregateRootId, aggregateRootTypeName, version, nextExpectingEventVersion)
} else {
logger.info("{} nextExpectingEventVersion ignored, aggregateRootId: {}, aggregateRootTypeName: {}, version: {}, current nextExpectingEventVersion: {}", javaClass.name, aggregateRootId, aggregateRootTypeName, version, nextExpectingEventVersion)
}
}
}
private fun enqueueEventStream(processingEvent: ProcessingEvent) {
synchronized(lockObj) {
processingEvent.mailbox = this
processingEventQueue.add(processingEvent)
nextExpectingEventVersion = processingEvent.message.getVersion() + 1
if (logger.isDebugEnabled) {
logger.debug("{} enqueued new message, aggregateRootType: {}, aggregateRootId: {}, commandId: {}, eventVersion: {}, eventStreamId: {}, eventTypes: {}, eventIds: {}",
javaClass.name,
processingEvent.message.getAggregateRootTypeName(),
processingEvent.message.getAggregateRootId(),
processingEvent.message.commandId,
processingEvent.message.getVersion(),
processingEvent.message.id,
processingEvent.message.events.stream().map { x: IDomainEvent<*> -> x.javaClass.name }.collect(Collectors.joining("|")),
processingEvent.message.events.stream().map { x: IDomainEvent<*> -> x.id }.collect(Collectors.joining("|"))
)
}
}
}
fun enqueueMessage(processingEvent: ProcessingEvent): EnqueueMessageResult {
synchronized(lockObj) {
if (isRemoved()) {
throw MailBoxProcessException(String.format("ProcessingEventMailBox was removed, cannot allow to enqueue message, aggregateRootTypeName: %s, aggregateRootId: %s", aggregateRootTypeName, aggregateRootId))
}
val eventStream = processingEvent.message
if (nextExpectingEventVersion == null || eventStream.getVersion() > this.nextExpectingEventVersion!!) {
if (waitingProcessingEventDict.putIfAbsent(eventStream.getVersion(), processingEvent) == null) {
logger.warn("{} waiting message added, aggregateRootType: {}, aggregateRootId: {}, commandId: {}, eventVersion: {}, eventStreamId: {}, eventTypes: {}, eventIds: {}, nextExpectingEventVersion: {}",
javaClass.name,
eventStream.getAggregateRootTypeName(),
eventStream.getAggregateRootId(),
eventStream.commandId,
eventStream.getVersion(),
eventStream.id,
eventStream.events.stream().map { x: IDomainEvent<*> -> x.javaClass.name }.collect(Collectors.joining("|")),
eventStream.events.stream().map { obj: IDomainEvent<*> -> obj.id }.collect(Collectors.joining("|")),
nextExpectingEventVersion
)
}
return EnqueueMessageResult.AddToWaitingList
} else if (eventStream.getVersion() == nextExpectingEventVersion) {
enqueueEventStream(processingEvent)
tryEnqueueValidWaitingMessage()
lastActiveTime = Date()
tryRun()
return EnqueueMessageResult.Success
}
return EnqueueMessageResult.Ignored
}
}
/**
* 尝试运行一次MailBox，一次运行会处理一个消息或者一批消息，当前MailBox不能是运行中或者暂停中或者已暂停
*/
fun tryRun() {
synchronized(lockObj) {
if (isRunning()) {
return
}
setAsRunning()
if (logger.isDebugEnabled) {
logger.debug("{} start run, aggregateRootId: {}", javaClass.name, aggregateRootId)
}
CompletableFuture.runAsync({ processMessages() }, executor)
}
}
/**
* 请求完成MailBox的单次运行，如果MailBox中还有剩余消息，则继续尝试运行下一次
*/
fun completeRun() {
lastActiveTime = Date()
if (logger.isDebugEnabled) {
logger.debug("{} complete run, aggregateRootId: {}", javaClass.name, aggregateRootId)
}
setAsNotRunning()
if (getTotalUnHandledMessageCount() > 0) {
tryRun()
}
}
fun isInactive(timeoutSeconds: Int): Boolean {
return System.currentTimeMillis() - lastActiveTime.time >= timeoutSeconds
}
fun processMessages() {
val message = processingEventQueue.poll()
if (message != null) {
lastActiveTime = Date()
try {
handleProcessingEventAction.apply(message)
} catch (ex: Exception) {
logger.error("{} run has unknown exception, aggregateRootId: {}", javaClass.name, aggregateRootId, ex)
Task.sleep(1)
completeRun()
}
} else {
completeRun()
}
}
fun tryUsing(): Boolean {
return isUsing.compareAndSet(0, 1)
}
fun exitUsing() {
isUsing.set(0)
}
fun markAsRemoved() {
isRemoved.set(1)
}
private fun setAsRunning() {
isRunning.set(1)
}
fun isRunning(): Boolean {
return isRunning.get() == 1
}
fun isRemoved(): Boolean {
return isRemoved.get() == 1
}
private fun setAsNotRunning() {
isRunning.set(0)
}
fun getWaitingMessageCount(): Int {
return waitingProcessingEventDict.size
}
companion object {
private val logger = LoggerFactory.getLogger(ProcessingEventMailBox::class.java)
}
init {
processingEventQueue = ConcurrentLinkedQueue()
this.aggregateRootId = aggregateRootId
this.aggregateRootTypeName = aggregateRootTypeName
this.handleProcessingEventAction = handleProcessingEventAction
lastActiveTime = Date()
}
}