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API Design for Architects

Almost every software development project requires communication with other IT systems. A wide range of remoting technologies are available, each with different advantages and disadvantages. The training course will explain the different working methods of the technologies, as well as demonstrate brief examples highlighting the specific characteristics.

You will get to know the most important interface technologies as well as your preferred usage scenarios. Several case studies will demonstrate what is important when choosing the right technology and how this choice affects versioning, usage scenarios, scalability, development effort and other risks.



1 day


  • In this seminar, you will learn the basic functions of various interface technologies within a very short time and will be able to distinguish them from each other.
  • Using examples and case studies, you will gain practical knowledge to find a suitable solution for your project.

    target group

    As a project manager, developer or architect, you would like to find out about different ways of exchanging data via networks. You have not yet gained any more in-depth experience with the various technologies and would like to gain an overview in order to be able to use different interface technologies for your projects.

    Contents (new)

    Remote Communication – The Basics

    • Remote communication via Stub and Skeleton
    • Pitfalls in serializing data structures
    • Approaches for versioning interfaces
    • Finding a service provider using a directory service
    • The early days of remote communication: Corba and RMI

    Interface Definition using Description Languages

    • Code first vs. Contract first
    • Generation of language-specific client/server abstractions
    • Transactional vs. non-transactional interfaces
    • XML as data format
    • The days of SOA architectures: SOAP web services and WSDL

    Resource-based HTTP Interfaces

    • Bandwidth-optimized data transfer with JSON as data format
    • Better scalability due to being stateless
    • Using REST interfaces with JavaScript clients
    • Guidelines for REST interfaces
    • Standardizing REST with OData

    Service- and Message-based Communication

    • Advantages and disadvantages of asynchronous communication
    • Streaming vs. Request response
    • Binary formats for data transmission using Protobuf as an example
    • The modern variant of REST and SOAP: gRPC

    Asynchronous Service-to-Service Communication

    • Strict consistency vs. Eventual consistency
    • Message idempotence
    • Asynchronous yet transactional with Java Message Service (JMS)
    • Language-independent with Advanced Message Queuing Protocol (AMQP)
    • From the MessageQueue to the database: Apache Kafka

    Asynchronous Messaging Around IoT Systems

    • Quality of Service Level (QoS)
    • Topics vs. Queues
    • Message Queuing Telemetry Transport (MQTT)

    GraphQL as API Definition

    • Selectively choosing data to reduce network traffic
    • GraphQL Scheme Definition Language (SDL)
    • Examples of GraphQL queries

    Decision Criteria and Case Studies

    • Decision matrix for choosing technology
    • Case study 1: Online shop
    • Case study 2: IoT sensor
    • Case study 3: Car configuration website with complex backend
    • Case study 4: Financial transaction API
    • Case study 5: Social media application


    Basic Java knowledge is helpful, but not a requirement

    OIO Training

    OIO Orientation in Objects GmbH, experts for Java and JavaScript in Mannheim, joined the Trivadis group in May 2018. Together we are extending and strengthening our offer for Java and agile software development. These courses have been developed by OIO and will be held by our new colleagues.

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    Early booking pays off

    Book your training at least 3 or 6 months before the start of the course and take advantage of the flexible pricing.

    > 6 months> 3 months0–3 months
    660,00 EUR
    1'030.00 CHF
    750,00 EUR
    1'160.00 CHF
    830,00 EUR
    1'280.00 CHF
    Virtual Classroom 23.09.2021DE830,00 €
    Virtual Classroom 18.11.2021DE830,00 €
    Mannheim / DE 03.02.2022DE750,00 €
    Virtual Classroom 03.02.2022DE680,00 €
    Zürich / CH 19.05.2022DE1'030.00 CHF
    Mannheim / DE 15.09.2022DE660,00 €
    Virtual Classroom 15.09.2022DE600,00 €
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    • This course is held in another country. Due to the different tax conditions, you will have to book it in a separate booking process. We apologize for any inconvenience.
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    Trivadis, Bernd Rössler, Head of Training

    Bernd Rössler

    • Solution Manager Trivadis Training
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