51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
// Package with supporting functionality to run the microservice
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package runtime
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import (
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"fmt"
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"net/http"
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"time"
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"github.com/genofire/hs_master-kss-monolith/lib/log"
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"sync"
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)
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// URL to the microservice which manages the products (product catalogue)
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var ProductURL string
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// Struct that holds the information on the microservice cache
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type boolMicroServiceCache struct {
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LastCheck time.Time
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Value bool
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}
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// Cache for existing products
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var productExistCache map[int64]boolMicroServiceCache
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var productMutex sync.Mutex
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// Function to initialize the cache for existing products
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func init() {
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productExistCache = make(map[int64]boolMicroServiceCache)
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}
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// Function to check on the other microservice (product catalogue) if the product exists
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func ProductExists(id int64) (bool, error) {
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productMutex.Lock()
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defer productMutex.Unlock()
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if cache, ok := productExistCache[id]; ok {
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return cache.Value, nil
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}
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url := fmt.Sprintf(ProductURL, id)
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log.Log.WithField("url", url).Info("does the product exist?")
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res, err := http.Get(url)
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if err != nil {
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return false, err
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}
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productExistCache[id] = boolMicroServiceCache{
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LastCheck: time.Now(),
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Value: (res.StatusCode == http.StatusOK),
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}
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return productExistCache[id].Value, nil
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}
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