opossum - npm Package Compare versions

Comparing version 6.1.0 to 6.2.0

CHANGELOG.md

@@ -5,2 +5,9 @@ # Changelog
 
+## [6.2.0](https://www.github.com/nodeshift/opossum/compare/v6.1.0...v6.2.0) (2021-07-07)
+
+
+### Features
+
+* initialize the state of a breaker on creation ([#574](https://www.github.com/nodeshift/opossum/issues/574)) ([b3dd431](https://www.github.com/nodeshift/opossum/commit/b3dd431bee343dd58c8612868333c90d0edbb83a))
+
 ## [6.1.0](https://www.github.com/nodeshift/opossum/compare/v6.0.1...v6.1.0) (2021-05-06)
@@ -7,0 +14,0 @@

dist/opossum.min.js

@@ -1,2 +0,2 @@
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 //# sourceMappingURL=opossum.min.map

lib/circuit.js

@@ -164,4 +164,3 @@ 'use strict';
       } else {
-        // should it error if it is not a Status Object
-        throw new TypeError('Not a Status Object.  The status option must be an instance of Status');
+        this[STATUS] = new Status({ stats: this.options.status });
       }
@@ -173,7 +172,24 @@ } else {
     this[STATE] = CLOSED;
+
+    if (options.state) {
+      this[ENABLED] = options.state.enabled !== false;
+      this[WARMING_UP] = options.state.warmUp || this[WARMING_UP];
+      // Closed if nothing is passed in
+      this[CLOSED] = options.state.closed !== false;
+      // These should be in sync
+      this[HALF_OPEN] = this[PENDING_CLOSE] = options.state.halfOpen || false;
+      // Open should be the opposite of closed,
+      // but also the opposite of half_open
+      this[OPEN] = !this[CLOSED] && !this[HALF_OPEN];
+
+      this[SHUTDOWN] = options.state.shutdown || false;
+
+    } else {
+      this[PENDING_CLOSE] = false;
+      this[ENABLED] = options.enabled !== false;
+    }
+
     this[FALLBACK_FUNCTION] = null;
-    this[PENDING_CLOSE] = false;
     this[NAME] = options.name || action.name || nextName();
     this[GROUP] = options.group || this[NAME];
-    this[ENABLED] = options.enabled !== false;
 
@@ -246,2 +262,17 @@ if (this[WARMING_UP]) {
     }
+
+    // Prepopulate the State of the Breaker
+    if (this[SHUTDOWN]) {
+      this[STATE] = SHUTDOWN;
+      this.shutdown();
+    } else if (this[CLOSED]) {
+      this.close();
+    } else if (this[OPEN]) {
+      // If the state being passed in is OPEN
+      // THen we need to start some timers
+      this.open();
+    } else if (this[HALF_OPEN]) {
+      // Not sure if anythign needs to be done here
+      this[STATE] = HALF_OPEN;
+    }
   }
@@ -387,2 +418,17 @@
 
+  toJSON () {
+    return {
+      state: {
+        name: this.name,
+        enabled: this.enabled,
+        closed: this.closed,
+        open: this.opened,
+        halfOpen: this.halfOpen,
+        warmUp: this.warmUp,
+        shutdown: this.isShutdown
+      },
+      status: this.status.stats
+    };
+  }
+
   /**
@@ -389,0 +435,0 @@ * Gets whether the circuit is enabled or not

package.json

 {
   "name": "opossum",
-  "version": "6.1.0",
+  "version": "6.2.0",
   "author": "Red Hat, Inc.",
@@ -80,3 +80,3 @@ "license": "Apache-2.0",
   "engines": {
-    "node": "^16 || ^14 || ^12 || ^10"
+    "node": "^16 || ^14 || ^12"
   },
@@ -83,0 +83,0 @@ "dependencies": {},

README.md

@@ -90,5 +90,40 @@ # opossum
 ```
+### Breaker State Initialization
+
+There may be times where you will need to initialize the state of a Circuit Breaker.  Primary use cases for this are in a serverless environment such as Knative or AWS Lambda, or any container based platform, where the container being deployed is ephemeral.
+
+The `toJSON` method is a helper function to get the current state and status of a breaker:
+
+```
+const breakerState = breaker.toJSON();
+```
+
+This will return an object that might look similar to this:
+
+```
+{
+  state: {
+    enabled: true,
+    name: 'functionName'
+    closed: true,
+    open: false,
+    halfOpen: false,
+    warmUp: false,
+    shutdown: false
+  },
+  status: {
+    ...
+  }
+};
+```
+
+A new circuit breaker instance can be created with this state by passing this object in:
+
+```
+const breaker = new CircuitBreaker({state: state});
+```
+
 ### Status Initialization
 
-There may be times where you will need to pre-populate the stats of the Circuit Breaker Status Object.  Primary use cases for this are in a serverless environment such as Knative or AWS Lambda, or any container based platform, where the container being deployed is ephemeral.
+There may also be times where you will need to pre-populate the stats of the Circuit Breaker Status Object.  Primary use cases for this are also in a serverless environment such as Knative or AWS Lambda, or any container based platform, where the container being deployed is ephemeral.
 
@@ -95,0 +130,0 @@ Getting the existing cumalative stats for a breaker can be done like this:

No alert changes

Improved metrics

Total package byte prevSize

839182

increased by1.01%

Lines of code

4210

increased by1.99%

Number of lines in readme file

424

increased by9%

No dependency changes