ChrisSamo632 commented on a change in pull request #4822: URL: https://github.com/apache/nifi/pull/4822#discussion_r627510454
########## File path: nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/main/java/org/apache/nifi/processors/aws/kinesis/stream/ConsumeKinesisStream.java ########## @@ -0,0 +1,678 @@ +/* + * 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.stream; + +import com.amazonaws.auth.AWSCredentialsProvider; +import com.amazonaws.auth.AWSStaticCredentialsProvider; +import com.amazonaws.auth.AnonymousAWSCredentials; +import com.amazonaws.services.kinesis.clientlibrary.interfaces.v2.IRecordProcessorFactory; +import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream; +import com.amazonaws.services.kinesis.clientlibrary.lib.worker.KinesisClientLibConfiguration; +import com.amazonaws.services.kinesis.clientlibrary.lib.worker.Worker; +import com.amazonaws.services.kinesis.metrics.impl.NullMetricsFactory; +import org.apache.commons.beanutils.BeanUtilsBean; +import org.apache.commons.beanutils.ConvertUtilsBean2; +import org.apache.commons.beanutils.FluentPropertyBeanIntrospector; +import org.apache.commons.beanutils.PropertyUtilsBean; +import org.apache.commons.lang3.StringUtils; +import org.apache.nifi.annotation.behavior.DynamicProperties; +import org.apache.nifi.annotation.behavior.DynamicProperty; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SystemResource; +import org.apache.nifi.annotation.behavior.SystemResourceConsideration; +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.SeeAlso; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.annotation.lifecycle.OnStopped; +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.ValidationContext; +import org.apache.nifi.components.ValidationResult; +import org.apache.nifi.controller.ControllerService; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessSessionFactory; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.processors.aws.kinesis.stream.record.AbstractKinesisRecordProcessor; +import org.apache.nifi.processors.aws.kinesis.stream.record.KinesisRecordProcessorRaw; +import org.apache.nifi.processors.aws.kinesis.stream.record.KinesisRecordProcessorRecord; +import org.apache.nifi.serialization.RecordReaderFactory; +import org.apache.nifi.serialization.RecordSetWriterFactory; +import org.apache.nifi.serialization.record.RecordFieldType; + +import java.lang.reflect.InvocationTargetException; +import java.net.InetAddress; +import java.net.UnknownHostException; +import java.time.LocalDateTime; +import java.time.ZoneOffset; +import java.time.format.DateTimeFormatter; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.Date; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.TimeoutException; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.stream.Collectors; + +@InputRequirement(InputRequirement.Requirement.INPUT_FORBIDDEN) +@Tags({"amazon", "aws", "kinesis", "get", "stream"}) +@CapabilityDescription("Reads data from the specified AWS Kinesis stream and outputs a FlowFile for every processed Record (raw) " + + " or a FlowFile for a batch of processed records if a Record Reader and Record Writer are configured. " + + "At-least-once delivery of all Kinesis Records within the Stream while the processor is running. " + + "AWS Kinesis Client Library can take several seconds to initialise before starting to fetch data. " + + "Uses DynamoDB for check pointing and CloudWatch (optional) for metrics. " + + "Ensure that the credentials provided have access to DynamoDB and CloudWatch (if used) along with Kinesis.") +@WritesAttributes({ + @WritesAttribute(attribute = AbstractKinesisRecordProcessor.AWS_KINESIS_PARTITION_KEY, + description = "Partition key of the (last) Kinesis Record read from the Shard"), + @WritesAttribute(attribute = AbstractKinesisRecordProcessor.AWS_KINESIS_SHARD_ID, + description = "Shard ID from which the Kinesis Record was read"), + @WritesAttribute(attribute = AbstractKinesisRecordProcessor.AWS_KINESIS_SEQUENCE_NUMBER, + description = "The unique identifier of the (last) Kinesis Record within its Shard"), + @WritesAttribute(attribute = AbstractKinesisRecordProcessor.AWS_KINESIS_APPROXIMATE_ARRIVAL_TIMESTAMP, + description = "Approximate arrival timestamp of the (last) Kinesis Record read from the stream"), + @WritesAttribute(attribute = "mime.type", + description = "Sets the mime.type attribute to the MIME Type specified by the Record Writer (if configured)"), + @WritesAttribute(attribute = "record.count", + description = "Number of records written to the FlowFiles by the Record Writer (if configured)"), + @WritesAttribute(attribute = "record.error.message", + description = "This attribute provides on failure the error message encountered by the Record Reader or Record Writer (if configured)") +}) +@DynamicProperties({ + @DynamicProperty(name="Kinesis Client Library (KCL) Configuration property name", + description="Override default KCL Configuration properties with required values. Supports setting of values via the \"with\" " + + "methods on the KCL Configuration class. Specify the property to be set without the leading prefix, e.g. \"maxInitialisationAttempts\" " + + "will call \"withMaxInitialisationAttempts\" and set the provided value. Only supports setting of simple property values, e.g. String, " + + "int, long and boolean. Does not allow override of KCL Configuration settings handled by non-dynamic processor properties.", + expressionLanguageScope = ExpressionLanguageScope.NONE, value="Value to set in the KCL Configuration property") +}) +@SystemResourceConsideration(resource = SystemResource.CPU, description = "Kinesis Client Library is used to create a Worker thread for consumption of Kinesis Records. " + + "The Worker is initialised and started when this Processor has been triggered. It runs continually, spawning Kinesis Record Processors as required " + + "to fetch Kinesis Records. The Worker Thread (and any child Record Processor threads) are not controlled by the normal NiFi scheduler as part of the " + + "Concurrent Thread pool are are not released until this processor is stopped.") +@SystemResourceConsideration(resource = SystemResource.NETWORK, description = "Kinesis Client Library will continually poll for new Records, " + + "requesting up to a maximum number of Records/bytes per call. This can result in sustained network usage.") +@SeeAlso(PutKinesisStream.class) +@SuppressWarnings({"java:S110", "java:S2160", "java:S3077"}) +public class ConsumeKinesisStream extends AbstractKinesisStreamProcessor { + static final AllowableValue TRIM_HORIZON = new AllowableValue( + InitialPositionInStream.TRIM_HORIZON.toString(), + InitialPositionInStream.TRIM_HORIZON.toString(), + "Start reading at the last untrimmed record in the shard in the system, which is the oldest data record in the shard." + ); + static final AllowableValue LATEST = new AllowableValue( + InitialPositionInStream.LATEST.toString(), + InitialPositionInStream.LATEST.toString(), + "Start reading just after the most recent record in the shard, so that you always read the most recent data in the shard." + ); + static final AllowableValue AT_TIMESTAMP = new AllowableValue( + InitialPositionInStream.AT_TIMESTAMP.toString(), + InitialPositionInStream.AT_TIMESTAMP.toString(), "Start reading from the position denoted by a specific time stamp, provided in the value Timestamp." + ); + + public static final PropertyDescriptor APPLICATION_NAME = new PropertyDescriptor.Builder() + .displayName("Application Name") + .name("amazon-kinesis-stream-application-name") + .description("The Kinesis stream reader application name.") + .addValidator(StandardValidators.NON_BLANK_VALIDATOR) + .required(true).build(); + + public static final PropertyDescriptor INITIAL_STREAM_POSITION = new PropertyDescriptor.Builder() + .displayName("Initial Stream Position") + .name("amazon-kinesis-stream-initial-position") + .description("Initial position to read Kinesis streams.") + .allowableValues(LATEST, TRIM_HORIZON, AT_TIMESTAMP) + .defaultValue(LATEST.getValue()) + .required(true).build(); + + public static final PropertyDescriptor STREAM_POSITION_TIMESTAMP = new PropertyDescriptor.Builder() + .displayName("Stream Position Timestamp") + .name("amazon-kinesis-stream-position-timestamp") + .description("Timestamp position in stream from which to start reading Kinesis Records. " + + "Required if " + INITIAL_STREAM_POSITION.getDescription() + " is " + AT_TIMESTAMP.getDisplayName() + ". " + + "Uses the Timestamp Format to parse value into a Date.") + .addValidator(StandardValidators.NON_BLANK_VALIDATOR) // customValidate checks the value against TIMESTAMP_FORMAT + .dependsOn(INITIAL_STREAM_POSITION, AT_TIMESTAMP) + .required(false).build(); + + public static final PropertyDescriptor TIMESTAMP_FORMAT = new PropertyDescriptor.Builder() + .displayName("Timestamp Format") + .name("amazon-kinesis-stream-timestamp-format") + .description("Format to use for parsing the " + STREAM_POSITION_TIMESTAMP.getDisplayName() + " into a Date " + + "and converting the Kinesis Record's Approximate Arrival Timestamp into a FlowFile attribute.") + .addValidator((subject, input, context) -> { + if (StringUtils.isNotBlank(input)) { + try { + DateTimeFormatter.ofPattern(input); + } catch (Exception e) { + return new ValidationResult.Builder().valid(false).subject(subject).input(input) + .explanation("Must be a valid java.time.DateTimeFormatter pattern, e.g. " + RecordFieldType.TIMESTAMP.getDefaultFormat()) + .build(); + } + } + return new ValidationResult.Builder().valid(true).subject(subject).build(); + }) + .defaultValue(RecordFieldType.TIMESTAMP.getDefaultFormat()) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .required(true).build(); + + public static final PropertyDescriptor CHECKPOINT_INTERVAL_MILLIS = new PropertyDescriptor.Builder() Review comment: Good shout, I only learned about the `asTimePeriod` method after writing this processor and din't think to go back and change things... done -- This is an automated message from the Apache Git Service. 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