v2.0.0 Release

Major version release to address updates/issues identified in CHANGELOG.

Author: kylesomers

CHANGELOG.md

@@ -0,0 +1,15 @@
+=========
+CHANGELOG
+=========
+
+2.0.0
+=====
+* Introduces multi-region stack support for workshop to run in any of the 5 existing regions that have API Gateway and Lambda.
+* Solves hardcoded attribute dependencies, allowing for multiple stacks to run simultaneously in the same AWS account. Resources are created with stack name prepended to the resource names.
+* Removes caching from API Gateway stage to reduce costs for long running stacks.
+
+1.0.0
+==========
+* All commits prior to release 2.0.0 are considered a part of v1.0.0 release.
+* Initial release on Github.
+* Provides baseline zombie survivor chat application via CloudFormation stack, Lambda functions, DynamoDB tables, and API Gateway resources.

ChatServiceLambdaFunctions/ZombieGetMessages.js

@@ -1,24 +1,34 @@
 console.log('Loading function');
 var aws = require('aws-sdk');
-var ddb = new aws.DynamoDB(
-    {region: "us-west-2",
-     params: {TableName: "messages"}});
-     
+var ddb;
+
 var theContext;
 
 function dynamoCallback(err, response) {
-    if (err) { 
+    if (err) {
         console.log('error' + err, err.stack); // an error occurred
         theContext.fail(err);
     }
-    
+
     else {
-        console.log('result: ' + JSON.stringify(response))        // successful response 
+        console.log('result: ' + JSON.stringify(response))        // successful response
         theContext.succeed(response);
     }
 }
 
+function init(context) {
+  if(!ddb) {
+    var stackName = context.functionName.split('-z0mb1es-')[0];
+    var stackRegion = context.functionName.split('-GetMessagesFromDynamoDB-')[1];
+    ddb = new aws.DynamoDB({
+      region: stackRegion,
+      params: { TableName: stackName + "-messages" }
+    });
+  }
+}
+
 exports.handler = function(event, context) {
+    init(context);
     theContext = context;
     var params = {
         "KeyConditions": {

ChatServiceLambdaFunctions/ZombiePostMessage.js

@@ -1,9 +1,6 @@
 // Processes incoming messages for Zombie chat service
 var aws = require('aws-sdk');
-var ddb = new aws.DynamoDB(
-    {region: "us-west-2",
-    params: {TableName: "messages"}}
-);
+var ddb;
 var querystring = require('querystring');
 
 var theContext;
@@ -16,20 +13,21 @@ var channel = 'default';
 
 
 exports.handler = function(event, context) {
+    init(context);
     theContext = context;
-    
+
     if(event.message == null || event.message == 'null' || event.name == null || event.name == 'null') {
-        return context.fail("Message and Name cannot be null");  
+        return context.fail("Message and Name cannot be null");
     } else {
         message = event.message;
         from = event.name;
     }
-    
+
     if (event.timestamp == null || event.timestamp == 'null') {
         event.timestamp = "" + new Date().getTime();
         timestamp = event.timestamp;
     }
-    
+
     /**
      * For Debubugging input params to the lambda function
     console.log('Message: ' + message);
@@ -45,10 +43,22 @@ exports.handler = function(event, context) {
             "name":{"S":from}
         }
     };
-    
+
     dynamoPut(DDBparams);
 };
 
+function init(context) {
+  if(!ddb) {
+    console.log("Initializing DynamoDB client.");
+    var stackName = context.functionName.split('-z0mb1es-')[0];
+    var stackRegion = context.functionName.split('-WriteMessagesToDynamoDB-')[1];
+    ddb = new aws.DynamoDB({
+      region: stackRegion,
+      params: { TableName: stackName + "-messages" }
+    });
+  }
+}
+
 function dynamoPut(params){
     console.log("Putting item into DynamoDB");
     ddb.putItem(params, dynamoCallback);