Github user apiri commented on a diff in the pull request: https://github.com/apache/nifi/pull/213#discussion_r56212999 --- Diff: nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/main/java/org/apache/nifi/processors/aws/kinesis/firehose/PutKinesisFirehose.java --- @@ -0,0 +1,180 @@ +/* + * 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.aws.kinesis.firehose; + +import java.io.ByteArrayOutputStream; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import org.apache.commons.lang3.StringUtils; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import com.amazonaws.services.kinesisfirehose.AmazonKinesisFirehoseClient; +import com.amazonaws.services.kinesisfirehose.model.PutRecordBatchRequest; +import com.amazonaws.services.kinesisfirehose.model.PutRecordBatchResponseEntry; +import com.amazonaws.services.kinesisfirehose.model.PutRecordBatchResult; +import com.amazonaws.services.kinesisfirehose.model.Record; + +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"amazon", "aws", "firehose", "kinesis", "put", "stream"}) +@CapabilityDescription("Sends the contents to a specified Amazon Kinesis Firehose. " + + "In order to send data to firehose, the firehose delivery stream name has to be specified.") +@WritesAttributes({ + @WritesAttribute(attribute = "aws.kinesis.firehose.error.message", description = "Error message on posting message to AWS Kinesis Firehose"), + @WritesAttribute(attribute = "aws.kinesis.firehose.error.code", description = "Error code for the message when posting to AWS Kinesis Firehose"), + @WritesAttribute(attribute = "aws.kinesis.firehose.record.id", description = "Record id of the message posted to Kinesis Firehose")}) +public class PutKinesisFirehose extends AbstractKinesisFirehoseProcessor { + + /** + * Kinesis put record response error message + */ + public static final String AWS_KINESIS_FIREHOSE_ERROR_MESSAGE = "aws.kinesis.firehose.error.message"; + + /** + * Kinesis put record response error code + */ + public static final String AWS_KINESIS_FIREHOSE_ERROR_CODE = "aws.kinesis.firehose.error.code"; + + /** + * Kinesis put record response record id + */ + public static final String AWS_KINESIS_FIREHOSE_RECORD_ID = "aws.kinesis.firehose.record.id"; + + public static final List<PropertyDescriptor> properties = Collections.unmodifiableList( + Arrays.asList(KINESIS_FIREHOSE_DELIVERY_STREAM_NAME, BATCH_SIZE, MAX_MESSAGE_BUFFER_SIZE_MB, REGION, ACCESS_KEY, SECRET_KEY, CREDENTIALS_FILE, AWS_CREDENTIALS_PROVIDER_SERVICE, TIMEOUT, + PROXY_HOST,PROXY_HOST_PORT)); + + /** + * Max buffer size 1000kb + */ + public static final int MAX_MESSAGE_SIZE = 1000 * 1024; + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return properties; + } + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) { + FlowFile flowFileCandidate = session.get(); + if ( flowFileCandidate == null ) + return; + + long currentBufferSizeBytes = flowFileCandidate.getSize(); + + final int batchSize = context.getProperty(BATCH_SIZE).asInteger(); + final int maxBufferSizeBytes = context.getProperty(MAX_MESSAGE_BUFFER_SIZE_MB).asInteger() * 1024 * 1000; + + // Get max batch size messages with size limit defined by maxBufferSizeBytes + List<FlowFile> flowFiles = new ArrayList<FlowFile>(batchSize); + flowFiles.add(flowFileCandidate); + for (int i = 1; (i < batchSize) && (currentBufferSizeBytes <= maxBufferSizeBytes); i++) { + flowFileCandidate = session.get(); + if ( flowFileCandidate == null ) + break; + currentBufferSizeBytes += flowFileCandidate.getSize(); + flowFiles.add(flowFileCandidate); + } + + final String firehoseStreamName = context.getProperty(KINESIS_FIREHOSE_DELIVERY_STREAM_NAME).getValue(); + final AmazonKinesisFirehoseClient client = getClient(); + + try { + List<Record> records = new ArrayList<>(); + + List<FlowFile> failedFlowFiles = new ArrayList<>(); + List<FlowFile> successfulFlowFiles = new ArrayList<>(); + + // Prepare batch of records + for (int i = 0; i < flowFiles.size(); i++) { + FlowFile flowFile = flowFiles.get(i); + + // If flow file too large send it to failure --- End diff -- On second thought, I am okay with this. Seeing as how the Firehose also batches/aggregates I do not feel there is any issue with sending batch sizes that may be a bit smaller
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