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feat(es): Support ElasticsearchEventStore (#983)
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146 changes: 146 additions & 0 deletions
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...search/src/main/kotlin/me/ahoo/wow/elasticsearch/eventsourcing/ElasticsearchEventStore.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| * Copyright [2021-present] [ahoo wang <[email protected]> (https://github.com/Ahoo-Wang)]. | ||
| * 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 me.ahoo.wow.elasticsearch.eventsourcing | ||
|
|
||
| import co.elastic.clients.elasticsearch._types.OpType | ||
| import co.elastic.clients.elasticsearch._types.Refresh | ||
| import co.elastic.clients.elasticsearch._types.SortOrder | ||
| import me.ahoo.wow.api.modeling.AggregateId | ||
| import me.ahoo.wow.api.modeling.NamedAggregate | ||
| import me.ahoo.wow.elasticsearch.IndexNameConverter.toEventStreamIndexName | ||
| import me.ahoo.wow.elasticsearch.query.ElasticsearchConditionConverter.toQuery | ||
| import me.ahoo.wow.elasticsearch.query.ElasticsearchSortConverter.toSortOptions | ||
| import me.ahoo.wow.event.DomainEventStream | ||
| import me.ahoo.wow.eventsourcing.AbstractEventStore | ||
| import me.ahoo.wow.eventsourcing.AggregateIdScanner.Companion.FIRST_CURSOR_ID | ||
| import me.ahoo.wow.eventsourcing.EventVersionConflictException | ||
| import me.ahoo.wow.query.dsl.condition | ||
| import me.ahoo.wow.query.dsl.sort | ||
| import me.ahoo.wow.serialization.MessageRecords | ||
| import org.elasticsearch.client.ResponseException | ||
| import org.springframework.data.elasticsearch.client.elc.ReactiveElasticsearchClient | ||
| import reactor.core.publisher.Flux | ||
| import reactor.core.publisher.Mono | ||
| import reactor.kotlin.core.publisher.toMono | ||
|
|
||
| class ElasticsearchEventStore( | ||
| private val elasticsearchClient: ReactiveElasticsearchClient, | ||
| private val refreshPolicy: Refresh = Refresh.True | ||
| ) : AbstractEventStore() { | ||
| companion object { | ||
| private const val VERSION_CONFLICT_CODE = 409 | ||
| private const val DEFAULT_BATCH_SIZE = 100 | ||
| } | ||
|
|
||
| private fun DomainEventStream.toDocId(): String { | ||
| return "${this.aggregateId.id}-${this.version}" | ||
| } | ||
|
|
||
| override fun appendStream(eventStream: DomainEventStream): Mono<Void> { | ||
| return elasticsearchClient.index { | ||
| it.index(eventStream.aggregateId.toEventStreamIndexName()) | ||
| .id(eventStream.toDocId()) | ||
| .document(eventStream) | ||
| .opType(OpType.Create) | ||
| .refresh(refreshPolicy) | ||
| }.onErrorResume { | ||
| if (it is ResponseException && it.response.statusLine.statusCode == VERSION_CONFLICT_CODE) { | ||
| return@onErrorResume EventVersionConflictException( | ||
| eventStream = eventStream, | ||
| cause = it, | ||
| ).toMono() | ||
| } | ||
| Mono.error(it) | ||
| }.then() | ||
| } | ||
|
|
||
| override fun loadStream( | ||
| aggregateId: AggregateId, | ||
| headVersion: Int, | ||
| tailVersion: Int | ||
| ): Flux<DomainEventStream> { | ||
| return loopStream(aggregateId, headVersion, tailVersion) | ||
| } | ||
|
|
||
| private fun loopStream( | ||
| aggregateId: AggregateId, | ||
| headVersion: Int, | ||
| tailVersion: Int | ||
| ): Flux<DomainEventStream> { | ||
| var endVersion = headVersion + DEFAULT_BATCH_SIZE - 1 | ||
| if (tailVersion < endVersion) { | ||
| endVersion = tailVersion | ||
| } | ||
| return findEventStream(aggregateId, headVersion, endVersion).flatMapMany { | ||
| val previousStreams = Flux.fromIterable(it) | ||
| val requestSize = endVersion - headVersion + 1 | ||
| if (it.size < requestSize) { | ||
| return@flatMapMany previousStreams | ||
| } | ||
| val lastVersion = it.last().version | ||
| if (lastVersion >= tailVersion) { | ||
| return@flatMapMany previousStreams | ||
| } | ||
| val nextStreams = loopStream(aggregateId, lastVersion + 1, tailVersion) | ||
| return@flatMapMany previousStreams.concatWith(nextStreams) | ||
| } | ||
| } | ||
|
|
||
| private fun findEventStream( | ||
| aggregateId: AggregateId, | ||
| headVersion: Int, | ||
| tailVersion: Int | ||
| ): Mono<List<DomainEventStream>> { | ||
| val query = condition { | ||
| tenantId(aggregateId.tenantId) | ||
| MessageRecords.AGGREGATE_ID eq aggregateId.id | ||
| MessageRecords.VERSION between headVersion to tailVersion | ||
| }.toQuery() | ||
| val sort = sort { MessageRecords.VERSION.asc() }.toSortOptions() | ||
| return elasticsearchClient.search<DomainEventStream>({ | ||
| it.index(aggregateId.toEventStreamIndexName()) | ||
| .query(query) | ||
| .size(DEFAULT_BATCH_SIZE) | ||
| .sort(sort) | ||
| }, DomainEventStream::class.java).map<List<DomainEventStream>> { | ||
| it.hits().hits().map { hit -> hit.source() as DomainEventStream } | ||
| } | ||
| } | ||
|
|
||
| override fun scanAggregateId( | ||
| namedAggregate: NamedAggregate, | ||
| cursorId: String, | ||
| limit: Int | ||
| ): Flux<AggregateId> { | ||
| TODO("Not yet implemented") | ||
| } | ||
|
|
||
| override fun tailCursorId(namedAggregate: NamedAggregate): Mono<String> { | ||
| return elasticsearchClient.search({ searchBuilder -> | ||
| searchBuilder.index(namedAggregate.toEventStreamIndexName()) | ||
| .size(1) | ||
| .sort { | ||
| it.field { | ||
| it.field(MessageRecords.AGGREGATE_ID).order(SortOrder.Desc) | ||
| } | ||
| } | ||
| .source { | ||
| it.fetch(false) | ||
| } | ||
| }, Map::class.java).map<String> { | ||
| val hit = it.hits().hits().firstOrNull() ?: return@map FIRST_CURSOR_ID | ||
| hit.sort().first().stringValue() | ||
| } | ||
| } | ||
| } |
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28 changes: 28 additions & 0 deletions
28
wow-elasticsearch/src/main/resources/templates/wow-aggregate-id-template.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| { | ||
| "index_patterns": [ | ||
| "wow.*.id" | ||
| ], | ||
| "template": { | ||
| "settings": { | ||
| "number_of_shards": 3, | ||
| "number_of_replicas": 2 | ||
| }, | ||
| "mappings": { | ||
| "properties": { | ||
| "tenantId": { | ||
| "type": "keyword" | ||
| } | ||
| }, | ||
| "dynamic_templates": [ | ||
| { | ||
| "string_as_keyword": { | ||
| "match_mapping_type": "string", | ||
| "mapping": { | ||
| "type": "keyword" | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| } |
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