Now propagating caches upwards in the OnionCache

jsvennevid · jsvennevid · commit a47010730691 · 2018-03-22T03:06:13.000+01:00
diff --git a/lib/onion.js b/lib/onion.js
@@ -21,10 +21,24 @@ class OnionCache extends BaseCache {
             if (!result) {
                 return this.__get(key, index + 1);
             }
-            return result;
+
+            return this.__update(key, result, index - 1).then(() => {
+                return result;
+            });
         });
     }
 
+    __update(key, value, index) {
+        if (index < 0) {
+            return Promise.resolve();
+        }
+
+        const cache = this.caches[index];
+        return cache.set(key, value).then(() => {
+            return this.__update(key, value, index - 1);
+        })
+    }
+
     set(key, value) {
         return this.__set(key, value, 0);
     }
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "layer-cache",
-  "version": "1.0.3",
+  "version": "1.1.0",
   "main": "./index",
   "private": true,
   "author": "jesper@microcode.se",
diff --git a/test/onion.js b/test/onion.js
@@ -32,6 +32,30 @@ describe('OnionCache', function () {
                 })
             });
         });
+
+        it('should populate first cache with data from second cache', function () {
+            const fastCache = new MemoryCache();
+            const slowCache = new MemoryCache();
+            const cache = new OnionCache(fastCache, slowCache);
+            const testKey = 'key';
+            const testValue = 'value';
+
+            return slowCache.set(testKey, testValue).then(function () {
+                return fastCache.get(testKey).then((result) => {
+                    assert(result === undefined);
+                }).then(() => {
+                    return cache.get(testKey).then((result) => {
+                        assert(result === testValue);
+                    });
+                }).then(() => {
+                    return fastCache.get(testKey).then((result) => {
+                        assert(result === testValue);
+                    })
+                })
+
+            });
+        });
+
     });
 
     describe('set', function () {

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "layer-cache",`
`3`		`- "version": "1.0.3",`
	`3`	`+ "version": "1.1.0",`
`4`	`4`	`"main": "./index",`
`5`	`5`	`"private": true,`
`6`	`6`	`"author": "[email protected]",`