| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.apache.eagle.alert.engine.evaluator.impl; |
| |
| import org.apache.eagle.alert.engine.AlertStreamCollector; |
| import org.apache.eagle.alert.engine.StreamContext; |
| import org.apache.eagle.alert.engine.coordinator.PublishPartition; |
| import org.apache.eagle.alert.engine.coordinator.Publishment; |
| import org.apache.eagle.alert.engine.model.AlertStreamEvent; |
| import org.apache.eagle.alert.engine.router.StreamOutputCollector; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.*; |
| |
| |
| public class AlertBoltOutputCollectorWrapper implements AlertStreamCollector { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AlertBoltOutputCollectorWrapper.class); |
| |
| private final StreamOutputCollector delegate; |
| private final Object outputLock; |
| private final StreamContext streamContext; |
| |
| private volatile Set<PublishPartition> publishPartitions; |
| |
| public AlertBoltOutputCollectorWrapper(StreamOutputCollector outputCollector, Object outputLock, |
| StreamContext streamContext) { |
| this.delegate = outputCollector; |
| this.outputLock = outputLock; |
| this.streamContext = streamContext; |
| |
| this.publishPartitions = new HashSet<>(); |
| } |
| |
| @Override |
| public void emit(AlertStreamEvent event) { |
| if (event == null) { |
| return; |
| } |
| event.ensureAlertId(); |
| Set<PublishPartition> clonedPublishPartitions = new HashSet<>(publishPartitions); |
| for (PublishPartition publishPartition : clonedPublishPartitions) { |
| // skip the publish partition which is not belong to this policy and also check streamId |
| PublishPartition cloned = publishPartition.clone(); |
| Optional.ofNullable(event) |
| .filter(x -> x != null |
| && x.getSchema() != null |
| && cloned.getPolicyId().equalsIgnoreCase(x.getPolicyId()) |
| && (cloned.getStreamId().equalsIgnoreCase(x.getSchema().getStreamId()) |
| || cloned.getStreamId().equalsIgnoreCase(Publishment.STREAM_NAME_DEFAULT))) |
| .ifPresent(x -> { |
| cloned.getColumns().stream() |
| .filter(y -> event.getSchema().getColumnIndex(y) >= 0 |
| && event.getSchema().getColumnIndex(y) < event.getSchema().getColumns().size()) |
| .map(y -> event.getData()[event.getSchema().getColumnIndex(y)]) |
| .filter(y -> y != null) |
| .forEach(y -> cloned.getColumnValues().add(y)); |
| synchronized (outputLock) { |
| streamContext.counter().incr("alert_count"); |
| delegate.emit(Arrays.asList(cloned, event)); |
| } |
| }); |
| } |
| } |
| |
| @Override |
| public void flush() { |
| // do nothing |
| } |
| |
| @Override |
| public void close() { |
| } |
| |
| public synchronized void onAlertBoltSpecChange(Collection<PublishPartition> addedPublishPartitions, |
| Collection<PublishPartition> removedPublishPartitions, |
| Collection<PublishPartition> modifiedPublishPartitions) { |
| Set<PublishPartition> clonedPublishPartitions = new HashSet<>(publishPartitions); |
| clonedPublishPartitions.addAll(addedPublishPartitions); |
| clonedPublishPartitions.removeAll(removedPublishPartitions); |
| clonedPublishPartitions.addAll(modifiedPublishPartitions); |
| publishPartitions = clonedPublishPartitions; |
| } |
| |
| } |