migrate from version 2.2

README.md

@@ -33,11 +33,28 @@ Register Generic Pool Adapter on app.json as follows:
 The generic pool adapter will try to instantiate the adapter defined in options.adapter property.
 
 # Options
+
 ### adapter:
 The name of the data adapter to be linked with this pool adapter.
-### size:
-The number of the data adapters that are going to be pooled for new connections. The default value is 25.
-### timeout:
-A number of milliseconds to wait for getting a new data adapter. If this timeout exceeds, a timeout error will occured. The default value is 30000.
-### lifetime
-A number of milliseconds which indicates whether or not a pooled data adapter will be automatically ejected from data adapters' collection. The default value is 1200000.
+
+`@themost/pool` adapter uses [generic-pool](https://github.com/coopernurse/node-pool#documentation). 
+Read more about `generic-pool` [here](https://github.com/coopernurse/node-pool#documentation)
+
+Important Note: Upgrade from 2.2.x to 2.5.x
+
+Replace `@themost/pool@2.2.x` configuration:
+
+    {
+        "adapter": "development",
+        "size": 25,
+        "timeout": 30000,
+        "lifetime": 1200000
+    }
+
+with:
+
+    {
+        "adapter": "development",
+        "max": 25,
+        "acquireTimeoutMillis": 30000
+    }

index.js

@@ -358,6 +358,14 @@ function createInstance(options) {
     /**
      * @type {*}
      */
+    // upgrade from 2.2.x
+    if (typeof options.size === 'number') {
+        options.max = options.size
+    }
+    if (typeof options.timeout === 'number') {
+        options.acquireTimeoutMillis = options.timeout
+    }
+
     let pool = GenericPoolAdapter[pools][name];
     if (pool == null) {
         //create new pool with the name specified in options

spec/GenericPoolAdapter.spec.js

@@ -46,12 +46,16 @@ describe('PoolAdapter', () => {
     it('should create instance', () => {
         const adapter = createInstance(
             {
-                "adapter": "test"
+                "adapter": "test",
+                "size": 20
             });
         adapter.hasConfiguration(() => {
             return configuration;
         });
         expect(adapter).toBeTruthy();
+        const pool = GenericPoolAdapter.pool('test');
+        expect(pool).toBeTruthy();
+        expect(pool.max).toBe(20);
     });
 
     it('should open and close', async () => {