Note: Kubernetes uses some Docker-like containers tool so remember you won’t be able to run a Windows-based container on a Docker host with Linux on it – because Docker uses the host machine kernel.However, there are ways to work around this limitation:Docker for Windows with WSL2: Docker Desktop for Windows can use the Windows Subsystem for Linux 2 (WSL2)...
Docker commands:docker runis like docker create + docker start-it – interactive; will connect to the standard input of the container – thus allowing for interacting using the keyboardwe can run docker run -it sh – this will override the default image command and just start a shellusually, you run the container with its default command and then...
KinesisKinesis vs KafkaKinesisKafkaDeployment typesMay use 2 modes:- Provisioned mode- On-demand mode (new) – capacity is adjusted on demand; default capacity is 4MB/sec, maximum 200MB/s write and 400MB/s per consumer readRetention1-365 daysUnlimitedStream Topic ShardPartitionRecord partition keyRecord keyRecord dataRecord dataApproximateArrivalTimestampTimestamp ?Shard id (string)Partition number (number)Sequence number (meaningless number)Offset (per partition sequential (usually, but not a rule) number)Messages orderPreserved ar shard levelPreserved at partition levelCompressionNoAvailableEncryption...
https://speakerdeck.com/vitalieb/efficient-logs-with-elastic-stackDemo code available at https://github.com/vitalieb/ElasticStackPresentation
IntroductionChannels are used for routing messages to endpoints.Channels do the routing and endpoints perform the operations.Spring Integration (SI) provides numerous adapters for communication between different systems.SI uses 3 types of components to construct its messaging architecture:MessageChannelEndpointEndpoint > Channel (passes a Message) > EndpointSpring Integration mirrors everything from "Enterprise Integration Patterns"; so If you're familiar with those you can easily...
Advanced class design:
Anonymous classes are implicitly final and it can never be static.static method > default methoddefault method > abstract methoddefault method > default method (re-declared with different implementation)default method > static methodstatic method > non-static methodnon-static method > static methodStatic methods can never be abstract.Static interface methods must be invoked using the interface name instead of reference variable - otherwise...
What is Spring Boot?
Spring Boot is a set of preconfigured framework that works on top of Spring Framework and simplifies configuring a Spring application.
What are the advantages of using Spring Boot?
Most important advantage is easy configuration of Spring application.Additional to this it provides something more:Integrated web containers that allow for easy testing
Starters - sets of dependencies that help...
What does REST stand for?
REST stands for REpresentational State Transfer.
What is a resource?
Anything that can be named is a resource. Usually that nouns that define our model.
What are safe REST operations?
Safe operations are operations that don't change things. These are: GET
HEAD
OPTIONSWhat are idempotent operations? Why is idempotency important?
Idempotent operations are operations that always return the same result....
What is the delegating filter proxy?
Delegating filter proxy is a servlet filter registered with the web container that delegates the requests to a Filter implementation on the Spring context side. That is there a 2 places servlet filters are attached to:Web container
Spring contextAs of Spring Security all requests pass through delegating filter proxy that is registered with the container...