Kafka Streams Microservices Example

Kafka Streams Microservices Example

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Kafka Streams makes it easy to build scalable and robust applications

Below are the articles related to Apache Kafka topic discussion examples apache-kafka kafka-streams kogito As a follow up to the recent Building Audit Logs with Change Data Capture and Stream Processing blog post, we’d like to extend the example with admin features to make it possible to capture and fix any missing transactional data . Can someone advise me any kind of example in order to implement and better understand above technologies I hope it will help those who want to look for some basic tutorial to getting started with Apache Kafka especially version 1 .

It contains information about its design, usage, and configuration options, as well as information on how the Stream Cloud Stream concepts map onto Apache Kafka specific constructs

Streams are consumed in chunks and in kafka node each chunk is a kafka message Kafka Streams is purpose built for reading data from Kafka topics, processing it, and writing the results to new topics . const KafkaStreams = require(kafka-streams); const config = require( A stream can be a table, and a table can be a stream .

This article introduces the API and talks about the challenges in building a distributed streaming application with interactive queries

I like Kafka especially because of the availability of an API for user-friendly Python and its easy integration with many other tools via Kafka Connect I’m running my Kafka and Spark on Azure using services like Azure Databricks and HDInsight . In this example, the first method is a Kafka Streams processor and the second method is a regular MessageChannel-based consumer A typical example of a stream application is reading data from 2 .

In this article, I will utilize Kafka Core and Streams for writing a replay commit log for RESTful endpoints

Export data from Kafka topics into secondary systems for storage and analysis kafka streams aggregate example java, Home Β» Java Β» Enterprise Java Β» Getting started with Apache Flink and Kafka . Introducing the Kafka Streams API; Building Hello World for Kafka Streams; Exploring the ZMart Kafka Streams application in depth; Splitting an incoming stream into multiple streams For the first Kafka Streams example, we'll deviate from the problem outlined in chapter 1 to a simpler use case It will show the relationship between this type of service and the emerging paradigm of stream processing, and will introduce Kafka Streams, a powerful distributed stream processing client that is part of Apache Kafka .

This would allow Kafka Streams to offer a great processing model as well as a simple deployment model

Kafka is a message broker written in Scala so it runs in JVM which in turn means that we can use jmx-exporter for its metrics Using several example microservice applications, I'll compare and contrast using Akka Streams and Kafka Streams for stream processing with Kafka as the data backplane . Developing a single microservice application might be interesting! But handling a business transaction which spans across multiple microservices is not fun! As see above, both the input and output of Kafka Streams applications are Kafka topics .

Furthermore, in practice Kafka Streams does not guarantee that all records will be processed in timestamp order (even if processing records in timestamp order is the goal, it is only best effort)

For more complete and up-to-date documentation, see To run this Kafka configuration, docker with docker-compose is required The Imixs-Kafka Adapter is a powerful feature to integrate Imixs-Workflow in a Microservice Infrastructure based on Publish-Subscribe Messaging Queues . Make any collected data available for stream processing Apache Kafka tutorial journey will cover all the concepts from its architecture to its core concepts .

A lot of our services have a relatively simple usage pattern of Kafka: i

The primary goal of this piece of software is to allow programmers to create efficient, real-time, streaming applications that could work as Microservices In this lecture, I will help you create your first Kafka Streams Application . Later versions will likely work, but this was example was done with 0 Kafka Streams creates a replicated changelog Kafka topic (in which it tracks local updates) for each state store .

Learn to transform a stream of events using Kafka Streams with full code examples This working example could be helpful to find the most frequent log entries over a certain time period . Kafka Streams in Action: Real-time apps and microservices with the Kafka Streams API Kafka Streams in Action teaches you everything you need to know to implement stream processing on data flowing into your Kafka platform, allowing you to focus on getting more from your data without sacrificing time or effort .

The Event-Driven Microservice example implements an Orders Service that provides a REST interface to POST and GET orders

We can send data from various sources to the Kafka queue,The data waiting in the queue can be in formats such as json, avro, etc William Bejeck; Safari, an O'Reilly Media Company . Kafka Streams is a framework shipped with Kafka that allows us to implement stream applications using Kafka Like Kafka Streams, we support tumbling, hopping and sliding windows of time, and old windows can be expired to stop data from filling up .

In this blog, we will show how Structured Streaming can be leveraged to consume and transform complex data streams from Apache Kafka

But with Kafka Streams and ksqlDB, building stream processing applications is easy and fun to maintain a running count of items in an inventory, you're going to need the In this example, we will be making use of the first two features of StatefulSet i . It provides data persistency and stores streams of records that render it capable of exchanging quality messages Recently, it has added Kafka Streams, a client library for building applications and microservices .

Scenario 2: Multiple output bindings through Kafka Streams branching

This platform provides us an elegant way to create a data pipeline where we can connect producers (New Account Service) which will be creating new records in the data pipeline If you ask me, no real-time data processing tool is complete without Kafka integration (smile), hence I added an example Spark Streaming application to kafka-storm-starter that demonstrates how to read from Kafka and write to Kafka, using Avro as the data format . Kafka helps you ingest and quickly move large amounts of data in a reliable way and is a very flexible tool for communication between loosely connected elements of IT systems Most of these model runners can be distributed and used by most of the microservices options .

But we always needed a processor with which we can Now here we are using the Kafka streams in our applications

To make it more concrete, agents that are under a specific network or a particular location should run a test against a domain example Modern event-driven architecture has become synonymous with Apache Kafka . Using Kafka Streams, we built shared state microservices that serve as fault-tolerant For example, in some cases our shared state is calculated based on a majority vote Most cloud providers also host managed Kafka services .

This leads to the consideration that it's simply possible to react to imminent load problems with new requirements

Apache Kafka became the de facto standard for microservice architectures Today we are going to build some microservices communicating with each other asynchronously through Apache Kafka topics . It is the de-facto standard for collecting and then streaming Kafka is different from other messaging system in that it delegates offset management to consumers The Kafka Streams DSL is the high-level API that enables you to build Kafka Streams applications quickly .

There is a free lite plan which offers access to a single partition in a multi-tenant Event Streams cluster

Kafka Streams is a new component of the Kafka platform Visually, an example of a Kafka Streams architecture may look like the following . Microservice-based architectures can be considered an industry trend and are thus often found in enterprise applications lately : ~ $ cd ~/kafka-streams-docker : kafka-streams-docker (master) $ Start a containerized Apache Kafka cluster, using Confluent's Docker images 02:14 by miguno 3 years ago .

We start a Zookeeper (a Kafka dependency) and Kafka with the JMX exporter running as a Java agent:

Click next, review and click Finish on next screen to complete MSK table creation The application must ensure that a new order will not exceed the customer's credit limit . In Kafka, we can only store our data for consumers to consume starting streams final KafkaStreams streams = new KafkaStreams(builder .

I thought that it was a good idea to borrow the SpecificAvroDeserializer which is used by WikipediaFeedAvroExample

Read honest and unbiased product reviews from our users In this case, you cannot use @Output because your method has parameters . One Kafka broker instance can handle hundreds of thousands of reads and writes per second and each bro-ker can handle TB of messages without performance impact Eventuate Local for microservices that use Event Sourcing .

In this example, the system centers on an Orders Service which exposes a REST interface to POST and GET Orders

Our wealth of experience in data architectures, event stream processing and with solutions such as Apache Kafka will ensure the success of your project at all key stages of its lifecycle The first step is of course to install the AsyncAPI generator itself . Traditionally, Apache Kafka has relied on Apache Spark or Apache Storm to process data between message producers and consumers All data types and code discussed below can be found in a GitHub repository .

When we have multiple microservices with different data sources, data consistency among the microservices is a big challenge

We will have a separate consumer and producer defined in java that will produce message to the topic and also consume message from it Here is the high-level architecture of this simple asynchronous processing example wtih 2 microservices . My course Kafka Streams for Data Processing teaches how to use this data processing library on Apache Kafka, through several examples that demonstrate the range of possibilities Kafka Streams make it possible to build, package and deploy applications without any need for separate stream processors or heavy and Creating a producer and consumer can be a perfect Hello, World! example to learn Kafka but there are multiple ways through which we can achieve it .

Kafka has a concept of topics that can be partitioned, allowing each partition to be replicated to ensure fault-toletant storage for arriving streams

Now let’s deep dive into the development of the application The Kafka cluster stores streams of records in categories called topics . Make sure generated POJOs have the Java types you would expect for generated variables! The Streams API allows an application to act as a stream processor, consuming an input stream from one or more topics and producing an output stream If I make a message broker with the topic name as 'example' then Kafka will send the message to the corresponding consumers which consume this .

streaming architecture new designs using apache kafka and mapr streams Nov 28, 2020 Posted By William Shakespeare Publishing TEXT ID 9705d95c Online PDF Ebook Epub Library Streaming Architecture New Designs Using Apache Kafka And Mapr Streams INTRODUCTION : #1 Streaming Architecture New

If you want to use a different version of the image, feel free to Kafka Streams is a client library for building applications and microservices . Scaling your Kafka Streams application is based on the records-lag metric and a matter of running up to as many instances as the input topic has partitions We start with a review of Kafka terminology and then present examples of Structured Streaming queries that read data from and write data to Apache .

Discuss the strengths and weaknesses of Kafka Streams and Akka Streams for particular design needs in data-centric microservices, including code examples from our Kafka Streams with Akka Streams tutorial

It’s designed to be horizontally scalable, fault-tolerant, and to also distribute data streams GlobalKTables are replicate all underlying topic partitions on each instance of KafkaStreams . While microservice architecture might not be a silver bullet for all systems, it definitely has its Why Apache Kafka? Kafka is a distributed streaming platform created by LinkedIn in 2011 to handle high For example, let's say we add a recommendation service in the future that needs to send out Tables can also store aggregate counts that are optionally β€œwindowed” so you can keep track of β€œnumber of clicks from the last day,” or β€œnumber of clicks in the last hour .

AMQ streams has a particular focus on using Kafka on Red Hat OpenShift, the open source container application platform based on the Kubernetes container orchestrator

The first thing we're going to do is create a stream In other words, it is easy to introduce new functions and qualities at any stage of the product . Async Service - Example project on how to use asynchronous API to handle a large number of simultaneous connections For example, all β€œOrder Confirmed” events are shared to the external stream so that the public transport operator in question can immediately process the reservation .

This is picked up by different validation engines (Fraud Service, Inventory Service and Order Details Service), which validate the order in parallel, emitting a PASS or FAIL based on whether each validation succeeds

json); const factory = new KafkaStreams(config); I am aiming for the easiest api access possible checkout the word count example The merged stream would be part of building up the DSL . Kafka has managed SaaS on Azure, AWS, and Confluent Merely adding Sleuth to a Kafka Streams application will already show you the topology edges, by adding a tracing client supplier to the StreamsBuilder .

Each record consists of a key, a The Kafka Connector can write Reactive Messaging Messages as Kafka Records

I'm setting up a microservices architecture, and am confused about how gRPC can loosely-couple services (compared to a pub-sub message service like Kafka) In a few short years, Kafka has become the central communication platform for most services in our company . I wrote a simple Kafka stream program in Scala that reads from both the two Kafka topics movies and sales, joins the two messages based on movie_id and then create a business event which is published to events Kafka topic The lightweight Kafka Streams library provides exactly the power and simplicity you need for message handling in microservices and real-time event processing .

We have also seen some advanced visualizations to monitor Kafka metrics using Grafana, with example dashboards

This article is similar with the Apache Flink Quick Start Example, with a clear focus on data input and output with MapR Streams These are standard properties that are well known, and you can read all about them here . Spring Cloud Stream is a framework under the umbrella project Spring Cloud, which enables developers to build event-driven microservices with messaging systems like Kafka and RabbitMQ Despite its popularity, it may be tricky to run it on your development I use fixed version rather than latest, to guarantee that the example will work for you .

The example includes a producer, consumer and streams applications

The book Kafka Streams - Real-time Stream Processing helps you understand the stream processing in general and apply that skill to Kafka streams programming Apache Kafka is an open-source stream-processing software platform developed by the Apache Software Foundation, written in Scala and Java . This paper is intended for software architects and developers who are planning or building system utilizing stream processing, fast batch processing, data processing microservices or distributed java In this article, we are going to set up the Kafka management software to manage and overview our cluster .

Chris Richardson is the founder of the original CloudFoundry

In this easy-to-follow book, you’ll explore real-world examples to collect, transform, and aggregate data, work with multiple processors, and handle real-time events Kafka Streams is a pretty new and fast, lightweight stream processing solution that works best if all of your data ingestion is coming through Apache Kafka . Each pipeline reads data from its dedicated stream and then invokes a dedicated processor Kafka Streams is used for building streaming applications which transform data of one Kafka topics and feeds to another Kafka topic .

After a day of digging, I noticed that I couldn't even get the example working

At a very high level, Kafka is a fault tolerant, distributed publish-subscribe … Supporting Microservices architecture and implementing Kafka Streams Interactive Query . Here is the command to increase the partitions count from 2 to 3 for topic 'my-topic' which are useful when creating stream processors in event-driven architectures .

In Kafka Streams, data is stored in Kafka clusters

An application programming interface in itself, Kafka Streams is the client-side library Free Kafka Streams tutorials including joins, testing, transformations, etc . io and displayed on Kibana's Discover page: In this respect, it is good to take note that the same data can be visualized in different ways, each highlighting something With the Kafka Streams API, you filter and transform data streams with just Kafka and your application .

As you can imagine, streams work closely with databases, in most practical applications at least

This book shows the basics of microservices, the concepts of the most important technologies and finally concrete recipes with technologies such as client-side and server-side frontend integration, asynchronous microservices with Kafka or REST/Atom, synchronous systems with the Netflix stack and Consul or microservices When talking about microservices architecture, most people think of a network of stateless services w Tagged with kafka, eventdriven, microservices I am talking about event-driven microservices, where in addition to the classic request-response pattern, services publish messages which represent . Here is an example of Kafka logs being collected by Logz Kafka Streams is a client library for building applications and microservices, especially, where the input and output data are stored in Apache Kafka Clusters .

For example, the production Kafka cluster at New Relic processes more than 15 million messages per second for an aggregate data rate approaching 1 Tbps

Understand how Kafka Streams fits in the Apache Kafka Ecosystem and its architecture! If you want to learn more It let us stream messages from one service to another and process, aggregate and group them without the need to explicitly poll, parse and send them back to other Kafka topics . Let’s consider a simple example that models the tracking of visits to a web page Kafka Streams in Action: Real-time apps and microservices with the Kafka Streams API / Lists This work is on 0 lists .

Kafka Streams is a client library which provides an abstraction to an underlying Kafka cluster, and allows for stream manipulation operations to be performed on the hosting client

Kafka is a message bus optimized for high-ingress data streams and replay Streaming is all the rage in the data space, but can stream processing be used to build business systems? Do Streaming and Microservices actually have . For the examples some experience with Spark and Kafka is needed, I will refer to introduction You’ll get that vibe by reading the job description .

Kafka Streams in Action: Real-time apps and microservices with the Kafka Streams API β€œKafka Streams in Action teaches you to implement stream processing within the Kafka platform

The Kafka Streams Library is used to process, aggregate, and transform your data within Kafka Apache Kafka supports use cases such as metrics, activity tracking, log aggregation, stream processing, commit logs and event sourcing . The producer sends a new message every second with a simple Hello World payload It hinges on how easy it is to create front-end applications with Scala and Java .

By using the network 5 Tuple as key, we guarantee that packets belonging to the same stream are handled by the same Kafka consumers down the line

In this article, we will learn how this will fit in microservices In this tutorial we demonstrate how to add/read custom headers to/from a Kafka Message using Spring Kafka . Learn more about Patcor and the team, the leader in carport designs, canopies, shade carports and auto accessories The dimension the microservice architecture scales is the functional dimension .

destination application property to raw-sensor-data causes it to read from the raw-sensor-data Kafka topic or from a queue bound to the raw-sensor-data RabbitMQ exchange

In this easy-to-follow book, you'll explore real-world examples to collect, transform, and aggregate data, work with multiple processors, and handle real-time events Kafka Streams is a library designed to allow for easy stream processing of data flowing into a Kafka cluster . We will be configuring apache kafka and zookeeper in our local machine and create a test topic with multiple partitions in a kafka broker It follows a publish-subscribe model where you write .

Apache Kafka is an open-source stream-processing software platform which is used to handle the real-time data storage

Confluent expands upon Kafka's integration capabilities and comes with additional tools and security measures to monitor and manage Kafka streams for microservices data integration Over the years, MicroServices have become very popular . Design Pattern: Command Query Responsibility Segregation (CQRS Kafka’s own configurations can be set via DataStreamReader .

Kafka Streams Tutorial: How to filter a stream of events using Kafka Streams

It is important to understand it in detail before an adoption For example, using kafka-streams we can filter the stream, map, group by key, aggregate in time or session windows etc using either code or the SQL-like KSQL . Apache Kafka provides us with alter command to change Topic behaviour and add/modify configurations The Issue of Dual Writes In order to provide their functionality, microservices will typically have their own local data store .

Kafka Streams is the core API for stream processing on the JVM: Java, Scala, Clojure, etc

Kafka is a mature, resilient, and battle-tested product used all over the world with great success Microservices - Example project on how to build microservices with Oat++, and example on how to consolidate those microservices using monolithization technique . Stream processing has become one of the biggest needs for companies over the last few years as quick data insight becomes more and more important but current solutions can be complex and large, requiring additional tools to perform lookups and aggregations Rabo Alerts is a system formed by a set of microservices that produce, consume and/or stream messages from BEB .

Kafka Streams Microservices Example Find and contribute more Kafka tutorials with Confluent, the real-time event streaming experts

Kafka Streams in Action teaches you to implement stream processing within the Kafka platform …So this is the Kafka Streams's dependency…and similarly as before we also need . In this Kafka Architecture article, we will see API’s in Kafka Kafka is a key ingredient in microservices development .

For example, Akka Streams emerged as a dataflow-centric abstraction for the Akka Actor model, designed for general-purpose microservices, very low-latency event processing, and supports a wider class of application problems and third-party integrations via Alpakka

I started out doing a mix of client-side and backend work; but I found I preferred to work solely on the backend, so I made my home there It is based on a DSL (Domain Specific Language) that provides So hopefully the example described in this post is enough to introduce you to what event streaming microservices are about . Kafka Connect - A web server and framework for integrating Kafka with external data sources such as SQL databases, log files, and HTTP endpoints It’s designed as a simple and lightweight client library , which can be easily embedded in any Java application .

As all your data streams through Apache Kafka, there is no need to add multiple integrations

Chris helps clients around the world adopt the microservice architecture through consulting engagements, and training classes and workshops Asynchronous messaging systems are always an important part of any modern enterprise software solution . In this article, we'll be looking at the KafkaStreams library The Spring Cloud Stream framework provides an easy way to get started with event-driven microservices by providing binders that allow the developer to create their microservices without having to learn messaging APIs .

For example Event Streams is the managed Kafka service in the IBM Cloud

Kafka becomes the backplane for service communication, allowing microservices to become loosely coupled Posting an order creates an event in Kafka, which is picked up by three different validation engines: a Fraud Service, an Inventory Service, and an Order Details Service . This post describes an example, also tackling the bridge between synchronous and asynchronous worlds About the book Event Streaming with Kafka Streams and ksqlDB teaches you to implement stream processing within the Kafka platform .

With Apache Kafka a fault-tolerant and scalable messaging platform can be adapted to Saga Transactions based on a BPMN 2

The performance of Kafka is not affected by the data size of messages, so retaining lots of data is not a problem On our project, we built a great system to analyze customer records in real time . Next it creates two effectively independent stream-processing pipelines We pioneered a microservices architecture using Spark and Kafka and we had to tackle many technical challenges .

Let us explore what are Topics and how to create, configure, List and Delete Kafka topics

By means of approximately ten lines of code, I will explain the foundations of Kafka and it's interaction with Kafka-Python Kafka Connect Kafka Streams Powered By Community Kafka Summit Project Info Trademark Ecosystem Events Contact us Apache Kafka, Kafka, . In this scenario Kafka solves the problem of communicating safely between microservices, and Zeebe solves the problem that you need stateful workflow patterns within certain microservices, like for example waiting for events for a longer period of time, having proper timeouts and escalations in place Apache Kafka is a simple messaging system which works on a producer and consumer model .

However, it helps you understand the basic API structure and it's usage

Stream processing with Kafka Streams API, enables complex aggregations or joins of input streams onto an output stream of processed data kafka-python is designed to function much like the official java client, with a sprinkling of pythonic interfaces (e . Kafka Stream: It is a client library for building applications and microservices, where the input and output data are stored in Kafka clusters In this series, we will attempt to tackle common problems related to this approach, and provide convenient and simple examples .

In our last Kafka Tutorial, we discussed Kafka Use Cases and Applications

For example, it might contain additional information on whether the listing should be promoted higher in search results as a paid feature Kafka Connect can stream all the events from a database into a Kafka topic with very low latency . , to keep the balance of the accounts updated), thus, Cadence replaces Kafka Streams A third option is to build machine learning microservices in Python, R, or Scala .

These examples are extracted from open source projects

Kafka Streams is a c lient library for building applications and microservices, where the input and output data are stored in Kafka clusters Kafka Streams lets you send to multiple topics on the outbound by using a feature called branching . During Execution, sometimes Kafka throws Error Exception message which might look similar Check out examples showcasing end-to-end solutions and Confluent’s event streaming platform, built by the original creators of Apache Kafka .

After you've created the properties file as described previously, you can run the consumer groups tools in a terminal

In this easy-to-follow book, you'll explore real-world examples to Besides, the subtitle suggests that it will describe kafka streams applications in terms of microservices architecture, but actually it does not Kafka also offers exactly-once delivery of messages, where producers and consumers can work with topics independenly in their own speed . Using Kafka Streams & KSQL to Build a Simple Email Service A further wrapper for Golang producer (and consumer) built on top of Sarama and wvanbergen libraries is provided for ease of use in my kafkapc package .

After receiving the request, it retrieves the data from the http request and saves it to Kafka

Bootstrapping microservices becomes order independent, since all communications happens over topics Experienced software architect, author of POJOs in Action, the creator of the original CloudFoundry . A service consumes events from a Kafka stream and performs computations on the events They are smaller, modular, easy to deploy and scale etc .

This talk will make the case for Apache Kafka as a platform for event-drive apps

You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example Example: You can configure your Streams API applications to always use encryption when reading data from Kafka and when writing data to Kafka; this is very important when reading/writing data across security domains (e . The fact is, in most systems, you need to share data to a certain degree If you’re interested in them, you can refer to the following links: .

SOA, services should share a standard grammar, and microservices communication is not always a design flaw

Kafka has gained popularity with application developers and data management experts because it greatly simplifies working with data streams Therefore, it can be added to any JVM application or microservice to build lightweight, but scalable and mission-critical stream processing logic . Kafka Streams is a client-side library for building applications and microservices whose data is passed to and from a Kafka messaging system private static KafkaStreams createWikipediaStreamsInstance(String bootstrapServers) final Serializer jsonSerializer = new JsonSerializer(); final Deserializer jsonDeserializer = new JsonDeserializer .

For example, the number of registrations in any system

It so happend that I have not had experience with the following technologies: Microservices, AWS, Kubernetes, Kafka If you are working on a huge amount of data, you may have heard about Kafka . The table below shows the output (for each processed input record) for both offered join variants With 6 years working exclusively on the back-end and large data volumes, Bill currently uses Kafka to improve data flow to downstream Explains core principles with clear and simple coding examples .

After initially testing a way of creating a real-time data cache with CDC, Apache Kafka and microservices, Nationwide Building Society has gone on to build a stream processing backbone in an

Apache Kafka is the leading data landing platform In some cases, this may be an alternative to creating a . Step 1: run docker compose to start the kafka cluster The Streams API, available as a Java library that is part of the official Kafka project, is the easiest way to write mission-critical, real-time applications and microservices with all the benefits of Kafka’s server-side cluster technology .

In this case, you will either need to upgrade all producers and consumers to the new schema version at the

ProducerFactory is responsible for creating Kafka Producer instances We will be using alter command to add more partitions to an existing Topic . -Why Apache Kafka on Red Hat OpenShift is a great match With Amazon MSK, you can use native Apache Kafka APIs to populate data lakes, stream changes to and from databases, and power machine learning and analytics applications .

Accelerate your microservices journey with the world’s most popular open source API gateway For example, the diagram below is a simplification of a system we run for processing ongoing queries on event data: Batches of events stream in on the source topic and are parsed into individual events . For example, if you need to send a message to a stream, from inside a REST endpoint, when receiving a POST request This API allows you to transform data streams between input and output topics .

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