StevenACoffman

Clean Architecture (2022 H2)

Good architecture:

• good architecture = allow changes w/ flexibility + delay decision

Business rules:

• Entities: pure; small sets of critical business rules. Should be most independent & reusable. Can be an object with methods or data structures & functions
• Use case: not as pure; is an object. contains data elements & operations.
• Entities are lower level than (don’t depend on) use cases since use cases are closer to inputs/outputs.
• Entities & use cases are 2 layers

StevenACoffman

package main

import (
	"fmt"
	"log"

	"context"

	"cloud.google.com/go/storage"

StevenACoffman

package main

import (
	"fmt"
	"io/ioutil"
	"log"

	"context"

	"cloud.google.com/go/storage"

StevenACoffman

package main

import (
	"fmt"
)

var (
	ones = []string{
		"zero", "one", "two", "three", "four",
		"five", "six", "seven", "eight", "nine",

StevenACoffman

package main

import (
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
)

func main() {

StevenACoffman

#Should be a job too :-D

# With xargs (on all namespaces)
kc get jobs -o=jsonpath='{range .items[?(@.status.conditions[0].type == "Failed")]}{.metadata.name}{"\t"}{.metadata.namespace}{"\n"}{end}' --all-namespaces | \
  xargs -n2 sh -c 'kubectl delete jobs $0 --namespace=$1'

# For loop (only in the current namespace)
for i in $(kc get jobs -o=jsonpath='{range .items[?(@.status.conditions[0].type == "Failed")]}{.metadata.name}{"\n"}{end}'); 
do kubectl delete jobs $i; done

StevenACoffman

# See: https://olegk.dev/go-linters-configuration-the-right-version

run:
  # Depends on your hardware, my laptop can survive 8 threads.
  concurrency: 8

  # I really care about the result, so I'm fine to wait for it.
  timeout: 30m

  # Fail if the error was met.

StevenACoffman

package main

import (
	"database/sql"
	"database/sql/driver"
	"fmt"
	"net"
	"os"
	"time"

StevenACoffman

// ConsoleHandler formats slog.Logger output in console format, a bit similar with Uber's zap
// ConsoleEncoder or Apex's CLI log
// The log format is designed to be human-readable.
//
// Performance can definitely be improved, however it's not my priority as
// this should only be used in development environment.
//
// e.g. log output:
// •  ./main.go:21 Debug message {"hello":"world","!BADKEY":"bad kv"}
// ℹ  ./main.go:217 Info message {"with_key_1":"with_value_1","group_1":{"with_key_2":"with_value_2","hello":"world"}}

StevenACoffman

package main

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"log"
	"net/http"
	"os"