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[ISSUE apache#4621] Implement TransformerEngine for EventMesh Transfo…
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eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/boot/TransformerEngine.java
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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. | ||
| */ | ||
|
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| package org.apache.eventmesh.runtime.boot; | ||
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| import org.apache.eventmesh.api.meta.MetaServiceListener; | ||
| import org.apache.eventmesh.common.utils.JsonUtils; | ||
| import org.apache.eventmesh.common.utils.LogUtils; | ||
| import org.apache.eventmesh.runtime.core.protocol.http.consumer.ConsumerGroupManager; | ||
| import org.apache.eventmesh.runtime.core.protocol.http.consumer.ConsumerManager; | ||
| import org.apache.eventmesh.runtime.core.protocol.producer.EventMeshProducer; | ||
| import org.apache.eventmesh.runtime.core.protocol.producer.ProducerManager; | ||
| import org.apache.eventmesh.runtime.meta.MetaStorage; | ||
| import org.apache.eventmesh.transformer.Transformer; | ||
| import org.apache.eventmesh.transformer.TransformerBuilder; | ||
| import org.apache.eventmesh.transformer.TransformerParam; | ||
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| import org.apache.commons.lang3.StringUtils; | ||
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Map.Entry; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
| import java.util.concurrent.TimeUnit; | ||
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| import com.fasterxml.jackson.databind.JsonNode; | ||
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| import lombok.extern.slf4j.Slf4j; | ||
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| @Slf4j | ||
| public class TransformerEngine { | ||
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| /** | ||
| * key:group-topic | ||
| **/ | ||
| private final Map<String, Transformer> transformerMap = new HashMap<>(); | ||
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| private final String transformerPrefix = "transformer-"; | ||
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| private final MetaStorage metaStorage; | ||
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| private MetaServiceListener metaServiceListener; | ||
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| private final ProducerManager producerManager; | ||
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| private final ConsumerManager consumerManager; | ||
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| private final ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor(); | ||
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| public TransformerEngine(MetaStorage metaStorage, ProducerManager producerManager, ConsumerManager consumerManager) { | ||
| this.metaStorage = metaStorage; | ||
| this.producerManager = producerManager; | ||
| this.consumerManager = consumerManager; | ||
| } | ||
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| public void start() { | ||
| Map<String, String> transformerMetaData = metaStorage.getMetaData(transformerPrefix, true); | ||
| for (Entry<String, String> transformerDataEntry : transformerMetaData.entrySet()) { | ||
| // transformer-group | ||
| String key = transformerDataEntry.getKey(); | ||
| // topic-transformerParam list | ||
| String value = transformerDataEntry.getValue(); | ||
| updateTransformerMap(key, value); | ||
| } | ||
| metaServiceListener = this::updateTransformerMap; | ||
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| // addListeners for producerManager & consumerManager | ||
| scheduledExecutorService.scheduleAtFixedRate(() -> { | ||
| ConcurrentHashMap<String, EventMeshProducer> producerMap = producerManager.getProducerTable(); | ||
| for (String producerGroup : producerMap.keySet()) { | ||
| for (String transformerKey : transformerMap.keySet()) { | ||
| if (!StringUtils.contains(transformerKey, producerGroup)) { | ||
| addTransformerListener(producerGroup); | ||
| LogUtils.info(log, "addTransformerListener for producer group: " + producerGroup); | ||
| } | ||
| } | ||
| } | ||
| ConcurrentHashMap<String, ConsumerGroupManager> consumerMap = consumerManager.getClientTable(); | ||
| for (String consumerGroup : consumerMap.keySet()) { | ||
| for (String transformerKey : transformerMap.keySet()) { | ||
| if (!StringUtils.contains(transformerKey, consumerGroup)) { | ||
| addTransformerListener(consumerGroup); | ||
| LogUtils.info(log, "addTransformerListener for consumer group: " + consumerGroup); | ||
| } | ||
| } | ||
| } | ||
| }, 10_000, 5_000, TimeUnit.MILLISECONDS); | ||
| } | ||
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| private void updateTransformerMap(String key, String value) { | ||
| String group = StringUtils.substringAfter(key, transformerPrefix); | ||
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| JsonNode transformerJsonNodeArray = JsonUtils.getJsonNode(value); | ||
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| if (transformerJsonNodeArray != null) { | ||
| for (JsonNode transformerJsonNode : transformerJsonNodeArray) { | ||
| String topic = transformerJsonNode.get("topic").asText(); | ||
| String transformerParam = transformerJsonNode.get("transformerParam").toString(); | ||
| TransformerParam tfp = JsonUtils.parseObject(transformerParam, TransformerParam.class); | ||
| Transformer transformer = TransformerBuilder.buildTransformer(tfp); | ||
| transformerMap.put(group + "-" + topic, transformer); | ||
| } | ||
| } | ||
| addTransformerListener(group); | ||
| } | ||
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| public void addTransformerListener(String group) { | ||
| String transformerKey = transformerPrefix + group; | ||
| try { | ||
| metaStorage.getMetaDataWithListener(metaServiceListener, transformerKey); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException("addTransformerListener exception", e); | ||
| } | ||
| } | ||
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| public void shutdown() { | ||
| scheduledExecutorService.shutdown(); | ||
| } | ||
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| public Transformer getTransformer(String key) { | ||
| return transformerMap.get(key); | ||
| } | ||
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| } |
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63 changes: 63 additions & 0 deletions
63
eventmesh-transformer/src/main/java/org/apache/eventmesh/transformer/TransformerParam.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.eventmesh.transformer; | ||
|
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| public class TransformerParam { | ||
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| private TransformerType transformerType; | ||
| private String value; | ||
| private String template; | ||
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| public TransformerParam() { | ||
| } | ||
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| public TransformerParam(TransformerType transformerType, String value, String template) { | ||
| this.transformerType = transformerType; | ||
| this.value = value; | ||
| this.template = template; | ||
| } | ||
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| public TransformerParam(TransformerType transformerType, String value) { | ||
| this(transformerType, value, null); | ||
| } | ||
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| public TransformerType getTransformerType() { | ||
| return transformerType; | ||
| } | ||
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| public void setTransformerType(TransformerType transformerType) { | ||
| this.transformerType = transformerType; | ||
| } | ||
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| public String getValue() { | ||
| return value; | ||
| } | ||
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| public void setValue(String value) { | ||
| this.value = value; | ||
| } | ||
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| public String getTemplate() { | ||
| return template; | ||
| } | ||
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| public void setTemplate(String template) { | ||
| this.template = template; | ||
| } | ||
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| } |
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