Added way to set the table to pay per request

README.md

@@ -18,6 +18,7 @@ Rational defaults are set but can be overridden in the options object. Credentia
   - `table` Optional DynamoDB server session table name (defaults to "sessions")
   - `hashKey` Optional hash key (defaults to "id")
   - `prefix` Optional key prefix (defaults to "sess")
+  - `payPerRequest` Optional boolean when true will set the billing mode to `PAY_PER_REQUEST`
   - `reapInterval` Legacy session expiration cleanup in milliseconds.  Should instead enable [DynamoDB TTL](http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html) and select the `expires` field.  **BREAKING CHANGE** from v1.0.11 to v2.0.0 for reaping sessions with changes to the format of the expires field timestamp.
 
 ## Usage
@@ -42,8 +43,13 @@ Rational defaults are set but can be overridden in the options object. Credentia
         // Optional ProvisionedThroughput params, defaults to 5
         readCapacityUnits: 25,
         writeCapacityUnits: 25
+
+        // Optional payPerRequest will set read / write capacity units to 0
+        // and Billing Mode to PAY_PER_REQUEST
+        payPerRequest: false
     };
 
+
 With [connect](https://github.com/senchalabs/connect)
 
     var connect = require('connect');

lib/connect-dynamodb.js

@@ -44,6 +44,42 @@ module.exports = function (connect) {
         this.readCapacityUnits = null == options.readCapacityUnits ? 5 : parseInt(options.readCapacityUnits,10);
         this.writeCapacityUnits = null == options.writeCapacityUnits ? 5 : parseInt(options.writeCapacityUnits,10);
 
+        if (options.payPerRequest) {
+            this.tableOptions = {
+                TableName: this.table,
+                AttributeDefinitions: [{
+                    AttributeName: this.hashKey,
+                    AttributeType: 'S'
+                }],
+                KeySchema: [{
+                    AttributeName: this.hashKey,
+                    KeyType: 'HASH'
+                }],
+                ProvisionedThroughput: {
+                    ReadCapacityUnits: 0,
+                    WriteCapacityUnits: 0
+                }
+            }
+        }
+        this.tableOptions = {
+            TableName: this.table,
+            AttributeDefinitions: [{
+                AttributeName: this.hashKey,
+                AttributeType: 'S'
+            }],
+            KeySchema: [{
+                AttributeName: this.hashKey,
+                KeyType: 'HASH'
+            }],
+            ProvisionedThroughput: {
+                ReadCapacityUnits: this.readCapacityUnits,
+                WriteCapacityUnits: this.writeCapacityUnits
+            },
+            BillingModeSummary: {
+                BillingMode: "PAY_PER_REQUEST"
+            }
+        }
+
 
         if (options.client) {
             this.client = options.client;
@@ -70,21 +106,7 @@ module.exports = function (connect) {
             TableName: this.table
         }, function (error, info) {
             if (error) {
-                this.client.createTable({
-                    TableName: this.table,
-                    AttributeDefinitions: [{
-                        AttributeName: this.hashKey,
-                        AttributeType: 'S'
-                    }],
-                    KeySchema: [{
-                        AttributeName: this.hashKey,
-                        KeyType: 'HASH'
-                    }],
-                    ProvisionedThroughput: {
-                        ReadCapacityUnits: this.readCapacityUnits,
-                        WriteCapacityUnits: this.writeCapacityUnits
-                    }
-                }, console.log);
+                this.client.createTable(this.tableOptions, console.log);
             }
         }.bind(this));
     };