exceptionfactory commented on code in PR #6918: URL: https://github.com/apache/nifi/pull/6918#discussion_r1245397601
########## nifi-nar-bundles/nifi-mongodb-bundle/nifi-mongodb-processors/src/main/java/org/apache/nifi/processors/mongodb/PutMongoBulk.java: ########## @@ -0,0 +1,353 @@ +/* + * 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. + */ +package org.apache.nifi.processors.mongodb; + +import com.mongodb.WriteConcern; +import com.mongodb.client.MongoClient; +import com.mongodb.client.ClientSession; +import com.mongodb.client.MongoCollection; +import com.mongodb.client.model.BulkWriteOptions; +import com.mongodb.client.model.Collation; +import com.mongodb.client.model.CollationAlternate; +import com.mongodb.client.model.CollationCaseFirst; +import com.mongodb.client.model.CollationMaxVariable; +import com.mongodb.client.model.CollationStrength; +import com.mongodb.client.model.DeleteManyModel; +import com.mongodb.client.model.DeleteOneModel; +import com.mongodb.client.model.DeleteOptions; +import com.mongodb.client.model.InsertOneModel; +import com.mongodb.client.model.ReplaceOneModel; +import com.mongodb.client.model.ReplaceOptions; +import com.mongodb.client.model.UpdateManyModel; +import com.mongodb.client.model.UpdateOneModel; +import com.mongodb.client.model.UpdateOptions; +import com.mongodb.client.model.WriteModel; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.behavior.SystemResource; +import org.apache.nifi.annotation.behavior.SystemResourceConsideration; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.stream.io.StreamUtils; +import org.bson.BsonArray; +import org.bson.BsonDocument; +import org.bson.Document; +import org.bson.conversions.Bson; + +import java.nio.charset.Charset; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +@EventDriven +@Tags({ "mongodb", "insert", "update", "write", "put", "bulk" }) +@InputRequirement(Requirement.INPUT_REQUIRED) +@CapabilityDescription("Writes the contents of a FlowFile to MongoDB as bulk-update") +@SystemResourceConsideration(resource = SystemResource.MEMORY) +public class PutMongoBulk extends AbstractMongoProcessor { + static final Relationship REL_SUCCESS = new Relationship.Builder().name("success") + .description("All FlowFiles that are written to MongoDB are routed to this relationship").build(); + static final Relationship REL_FAILURE = new Relationship.Builder().name("failure") + .description("All FlowFiles that cannot be written to MongoDB are routed to this relationship").build(); + + static final PropertyDescriptor ORDERED = new PropertyDescriptor.Builder() + .name("Ordered") + .expressionLanguageSupported(ExpressionLanguageScope.NONE) + .description("Ordered execution of bulk-writes & break on error - otherwise arbitrary order & continue on error") + .required(false) + .addValidator(StandardValidators.BOOLEAN_VALIDATOR) + .allowableValues("true", "false") + .defaultValue("false") + .build(); + + static final PropertyDescriptor USE_TRANSACTION = new PropertyDescriptor.Builder() + .name("Use transaction") + .expressionLanguageSupported(ExpressionLanguageScope.NONE) + .description("Run all actions in one MongoDB transaction - does NOT work with a client service so far") + .required(false) + .addValidator(StandardValidators.BOOLEAN_VALIDATOR) + .allowableValues("true", "false") + .defaultValue("false") + .build(); + + static final PropertyDescriptor CHARACTER_SET = new PropertyDescriptor.Builder() + .name("Character Set") + .description("The Character Set in which the data is encoded") + .required(true) + .addValidator(StandardValidators.CHARACTER_SET_VALIDATOR) + .defaultValue("UTF-8") + .build(); + + private final static Set<Relationship> relationships; + private final static List<PropertyDescriptor> propertyDescriptors; + + static { + List<PropertyDescriptor> _propertyDescriptors = new ArrayList<>(); + _propertyDescriptors.addAll(descriptors); + _propertyDescriptors.add(WRITE_CONCERN); + _propertyDescriptors.add(ORDERED); + _propertyDescriptors.add(USE_TRANSACTION); + _propertyDescriptors.add(CHARACTER_SET); + propertyDescriptors = Collections.unmodifiableList(_propertyDescriptors); + + final Set<Relationship> _relationships = new HashSet<>(); + _relationships.add(REL_SUCCESS); + _relationships.add(REL_FAILURE); + relationships = Collections.unmodifiableSet(_relationships); + } + + @Override + public Set<Relationship> getRelationships() { + return relationships; + } + + @Override + public List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return propertyDescriptors; + } + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + final FlowFile flowFile = session.get(); + if (flowFile == null) { + return; + } + + final ComponentLog logger = getLogger(); + + final Charset charset = Charset.forName(context.getProperty(CHARACTER_SET).getValue()); + final WriteConcern writeConcern = getWriteConcern(context); + + ClientSession clientSession = null; + try { + final MongoCollection<Document> collection = getCollection(context, flowFile).withWriteConcern(writeConcern); + // Read the contents of the FlowFile into a byte array + final byte[] content = new byte[(int) flowFile.getSize()]; + session.read(flowFile, in -> StreamUtils.fillBuffer(in, content, true)); + + // parse + final BsonArray updateItems = BsonArray.parse(new String(content, charset)); + + List<WriteModel<Document>> updateModels = new ArrayList<>(); + for (Object item : updateItems) { + final BsonDocument updateItem = (BsonDocument) item; + if (updateItem.keySet().size() != 1) { + logger.error("Invalid bulk-update: more than one type given {}", String.join(", ", updateItem.keySet())); + session.transfer(flowFile, REL_FAILURE); + context.yield(); + return; + } + final String updateType = updateItem.keySet().iterator().next(); + final BsonDocument updateSpec = (BsonDocument) updateItem.get(updateType); + if ("insertOne".equals(updateType)) { + final InsertOneModel<Document> insertOneModel = new InsertOneModel<>(toBsonDocument((BsonDocument) updateSpec.get("document"))); + updateModels.add(insertOneModel); + } else if ("updateOne".equals(updateType)) { + final UpdateOptions options = parseUpdateOptions(updateSpec); + final UpdateOneModel<Document> updateOneModel = new UpdateOneModel<>((BsonDocument) updateSpec.get("filter"), (BsonDocument) updateSpec.get("update"), options); + updateModels.add(updateOneModel); + } else if ("updateMany".equals(updateType)) { + final UpdateOptions options = parseUpdateOptions(updateSpec); + final UpdateManyModel<Document> updateManyModel = new UpdateManyModel<>((BsonDocument) updateSpec.get("filter"), (BsonDocument) updateSpec.get("update"), options); + updateModels.add(updateManyModel); + } else if ("replaceOne".equals(updateType)) { + final ReplaceOptions options = parseReplaceOptions(updateSpec); + final ReplaceOneModel<Document> replaceOneModel = new ReplaceOneModel<>((BsonDocument) updateSpec.get("filter"), + toBsonDocument((BsonDocument) updateSpec.get("replacement")), options); + updateModels.add(replaceOneModel); + } else if ("deleteOne".equals(updateType)) { + final DeleteOptions options = parseDeleteOptions(updateSpec); + final DeleteOneModel<Document> deleteOneModel = new DeleteOneModel<>((BsonDocument) updateSpec.get("filter"), options); + updateModels.add(deleteOneModel); + } else if ("deleteMany".equals(updateType)) { + final DeleteOptions options = parseDeleteOptions(updateSpec); + final DeleteManyModel<Document> deleteManyModel = new DeleteManyModel<>((BsonDocument) updateSpec.get("filter"), options); + updateModels.add(deleteManyModel); + } else { + logger.error("Invalid bulk-update: invalid update type {}", updateType); + session.transfer(flowFile, REL_FAILURE); + context.yield(); + return; + } + } + + if (context.getProperty(USE_TRANSACTION).asBoolean()) { + MongoClient currentMongoClient; + if (clientService != null) { + // (can still add - if it's ever needed) + throw new RuntimeException("Cannot have transactions and use a client service - so far"); + } else { + currentMongoClient = this.mongoClient; + } + clientSession = currentMongoClient.startSession(); + clientSession.startTransaction(); + // now run this w/in a transaction + collection.bulkWrite(clientSession, updateModels, (new BulkWriteOptions().ordered(context.getProperty(ORDERED).asBoolean()))); + } else { + collection.bulkWrite(updateModels, (new BulkWriteOptions().ordered(context.getProperty(ORDERED).asBoolean()))); + } + logger.info("bulk-updated {} into MongoDB", flowFile); + // (could also return the result again as JSON - mostly not needed afaik) + + session.getProvenanceReporter().send(flowFile, getURI(context)); + session.transfer(flowFile, REL_SUCCESS); + + if (clientSession != null) { + if (clientSession.hasActiveTransaction()) { + clientSession.commitTransaction(); + } + clientSession.close(); + } + } catch (Exception e) { + logger.error("Failed to bulk-update {} into MongoDB due to {}", new Object[] {flowFile, e}, e); + session.transfer(flowFile, REL_FAILURE); + context.yield(); + try { + if (clientSession != null) { + if (clientSession.hasActiveTransaction()) { + clientSession.abortTransaction(); + } + clientSession.close(); + } + } catch (Exception ee) { + logger.error("Cannot rollback client session due to {}", new Object[]{ee}, ee); // (but no further action) Review Comment: ```suggestion logger.error("Cannot rollback client session", ee); // (but no further action) ``` -- This is an automated message from the Apache Git Service. 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