m

devops/cloud/aws/docs/course/linkedin.txt

@@ -7,3 +7,135 @@ https://www.linkedin.com/learning/learning-amazon-web-services-aws-for-developer
 https://www.linkedin.com/learning/instructors/jeremy-villeneuve
 https://www.linkedin.com/learning/aws-essential-training-for-developers
     ! 3h17m pretty short lessons
+
+completed
+2022
+https://www.linkedin.com/learning/aws-essential-training-for-developers-17237791
+    arn - amazon resource names
+    IAM identity center - for AD integration, Identity and Access Mgmt
+        entities -> users, roles
+        identities -> entities, groups
+        iam resources can attach policies to identies
+        principles
+    AWS Budgets - control costs for your entire AWS account or for individual projects
+    AWS organizations - to manage multiple root accounts
+    EC2 - Elastic Compute Cloud, auto-scaling
+    S3  - Simple Storage Service
+        have storage classes at mgmt as well
+        permissions
+        ACLs add ACLs to each obj
+    CloudFront - to replicate S3 buckets
+    GlobalAccelerator - to accelerate networking for S3
+    S3Glacier -> online file storage with backup
+    S3Snowball -> for moving tons of data to AWS
+
+    IAAS - pay only for what you use, you are responsible for os update, app security, ...
+    AMIs - Amazon Machine Images
+        can create image from existing EC2 - snapshots, and start instances from AMIs
+    Instance Types (T, M, X - memory optimized, C - compute optimized, G - with GPU)
+    .pem - file with RSA pub-key
+    AWS Pricing Calculator
+    Purchase Savings Plans -> EC2 ... savings Plans, Compute Savings Plans
+    AWS Marketplace - to get instances from 3rdParty vendors
+    EC2->Security Groups - can edit protocol allow/deny
+    VPC - virtual private cloud
+        Subnets, ..., NAT Gateways (add Elastic IP)
+    BastionHost
+    SessionManager(managed service)
+    AWSClientVPN, SideToSideVPN
+    AWSTransitGateway
+    AWSDirectConnect
+    ApplicationLoadBalancers, NetworkLoadBalancer, GatewayLoadBlancer
+    ALB -> (for HTTP traffic) `select VPC, security groups (create new alb-sg), add inbound rule, outbound ..., health-check port,
+        create a new target group (for 2 target servers)
+        copy DNS name finally
+    NLB - for low-latency streaming traffic
+    Route53 for register domain
+    VPC can have public and private subnets
+        192.168.0.0/16 means from 192.168.0.0 to 192.168.255.255
+        192.168.1.0/24            192.168.1.0 .. 192.168.1.255
+    EFS - elastic file system
+    FSx - for windows
+    IAM roles -> create a role to give access to all S3 buckets to all EC2
+    SecretsManager
+
+    DBaaS
+    DbMS - migration service
+    RDS  - relational database service (can't scale down)
+           when restoring DBs, RDS creates new cluster, copy/del
+    Aurora - works in serverless mode (not only for PG)
+
+    DynamoDB
+    ElastiCache - in-mem cache (redis and other engines)
+    ? Redshift
+
+    DataLakes,
+    DataWarehouses (RedShift -> structured storage for big and SQL-based analysis ...),
+    EMR - Elastic Map Reduce distibuted data processing (like spark/hadoop)
+
+    Queues
+    Kinesis
+    SQS - simpler, but expensive in case of huge num of events
+    SNS - simple notification service
+
+    Hosting
+    ElasticBeanstalk
+    Lightsail - for static
+
+    ECS - elastic container service
+    ECR - elastic container registry
+    Fargate - can run your containers external in hybrid-cloud env
+              for task-based containers
+    EKS -> K8s
+
+    Serverless
+    FaaS - functions as a service, Lambda
+
+    Scheduling
+    AWSJobs (can utilize spot instances)
+    Step Functions
+
+    Cognito - for user auth
+    SES - simple email service
+
+    APIGateway
+    AppSync
+
+    ML
+    SageMaker
+    Comprehend - for text analysis
+    Lex - for chatbots
+    Personalize - to promote recommended products to specific users, based on shopping habbits
+    Polly - convert dynamic text to voices
+    Rekognition - extract faces/text from images
+    Textract - automate all this
+    Translate - translate languages and even detect lang
+    Transcribe - transcibe voice to text
+
+    xray
+    Trace User Requests
+
+    CI - code pipeline
+    CodePipeline
+      CodeBuild
+      CodeDeploy
+    AWSOpsTools - for puppet, chef, ansible
+    CloudFormation
+    Terraform - let's use not only AWS stuff
+
+    messaging
+    Twillio
+
+    AWSHealth - health dashboard
+    CloudWatch - logs/metrics
+    CodeGuru - auto code-review
+
+    SecurityHub
+    SystemManager (SessionManager, AppCenter, check for security patches and tracing incidents)
+    WAF - web-app firewall, to block some traffic according to rules, deploys on top of ALB
+    Shield - help mitigate DoS attacks
+    GuardDuty - active on-going scan for security issues
+    Inspector - a full scan for vuln-ties (periodically)
+    Macie - scan cloud resources for publically-sharing info
+    CloudTrail - trace back in type access to our stuff
+    Detective - for api access, logs investigations of incidents

pl/java/features/ex-err.txt

@@ -1,9 +1,22 @@
 2022
-Devoxx - Subramaniam - Exception Handling in Functional and Reactive Programmin of 2:29:17
+Devoxx - Subramaniam - Exception Handling in Functional and Reactive Programming of 2:29:17
     https://www.youtube.com/watch?v=S5tLVsvbHBg
 2021
 https://bookflow.ru/sobesedovanie-po-java-isklyucheniya-exceptions-voprosy-i-otvety/
 http://victorrentea.ro/blog/exception-handling-guide-in-java/
+https://www.linkedin.com/learning/java-exception-handling/what-are-errors
+    Errors - are a subset of Throwables, indicating serious problem with an app
+    IOError
+        unrecoverable input/output error
+        serious issue with underlying FS
+    VirtualMachineError - running out of resources on JVM
+        - InternalError, UnknownError, OutOfMemoryError, StackOverflowError
+
+    Exceptions
+        Checked (at compile time)
+            IOException->FileNotFoundException
+        Unchecked (run-time)
+            NullPointerException
 2020
 https://javax0.wordpress.com/2020/05/13/all-you-wanted-to-know-about-throwable/
     !!!

pl/java/features/stream/docs/courses.txt

@@ -2,3 +2,7 @@
 Parallel Functional Programming with Java LiveLessons
     https://tutsnode.net/parallel-functional-programming-with-java/
     ! 3.7g good, including parallell streams
+
+https://www.linkedin.com/learning/java-lambdas-and-streams
+    @FunctionalInterface
+    stream can only be used once

pl/java/jdk/21/beginner-friendly.txt

@@ -0,0 +1,2 @@
+2023
+https://www.infoq.com/news/2023/05/beginner-friendly-java/

pl/java/libfws/spring/boot/test/dirties-context.txt

@@ -0,0 +1,2 @@
+2019
+https://www.baeldung.com/spring-dirtiescontext

pl/java/libfws/spring/events-pubsub/events.txt

@@ -0,0 +1,42 @@
+2023
+https://danielme.com/2023/01/10/spring-framework-event-handling-eventlistener-async/
+    https://docs.spring.io/spring-framework/docs/5.3.28/javadoc-api/org/springframework/context/event/SimpleApplicationEventMulticaster.html
+    https://docs.spring.io/spring-framework/docs/5.3.x/reference/html/core.html#context-functionality-events
+
+courses
+https://www.linkedin.com/learning/advanced-spring-application-events
+    ApplicationEvent (not required to exend this from Spring 4.2)
+    Publisher
+      @Autowired ApplicationEventPublisher publisher;
+      publisher.publishEvent(new CustomEvent)
+    Listeners
+      of ...implements ApplicationListener<ApplicationEvent>
+      @Override
+      public void onApplicationEvent(ApplicationEvent e) {} // limitation - only for objects, extending ApplicationEvent type
+
+      annotate our class with @Component and
+      @EventListener public void onEvent(Foo o) {} 
+      @EventListner({Foo.class, Bar.class}) public void onMultiple() {...}
+      @EventListner public void onAll() {...}
+
+      if method return type is non-void, then sends new event, if the type is array/collection -> sends each individual
+
+      @Order(1)
+
+    By default -> sync, but async is supported as well
+    Can also have @Transaction-bound events (BEFORE|AFTER_COMMIT, AFTER_ROLLBACK|COMPLETION)
+    Listeners can filter events by SpEL
+        @EventListener(condition="") eval-ted if "true"|"on"|"yes","1"
+           default - ""
+    We have predefined events (ApplicationStarting|StartedEvent, CotextStarted|Refreshed|Stopped|ClosedEvent)
+        need to manually 
+
+    Async
+    Add @EnableAsync on top of our spring config
+    and add @Async to our @EventListener
+    limitations
+        async listeners can't publish events by returning a value
+        exceptins aren't propagated to a caller untill AsyncUncaughtExceptionHandler i-face is imple-ted
+
+    @EventListener
+    @TransalEventListener(phase=TransactionPhase.BEFORE|AFTER_COMMIT, AFTER_ROLLBACK|COMPLETION)