I am using Lambda proxy integration to execute lambda from API Gateway. Following is my code for the same in Java. My lambda is executing properly from Eclipse and from AWS console. I assume this should be with the configuration of my API gateway. I have created a POST method and have defined a model as well.
But when I am trying the "Test" option from API Gateway, I am getting "Internal Error": {"errorMessage":"Input value must not be null","errorType":"java.lang.IllegalArgumentException"} and with "Execution failed due to configuration error: Malformed Lambda proxy response".
public class SavePersonHandler implements RequestHandler<PersonRequest, JSONObject> {
private DynamoDB dynamoDb;
JSONParser parser = new JSONParser();
private String DYNAMODB_TABLE_NAME = "XXXX";
private Regions REGION = Regions.US_WEST_2;
public JSONObject handleRequest(UserRequest userRequest, Context context) {
this.initDynamoDbClient();
LambdaLogger logger = context.getLogger();
String responseCode = "200";
JSONObject responseJson = new JSONObject();
saveData(personRequest); // inserting data into DynamoDB
UserResponse userResponse = new UserResponse();
try {
//Getting the recently inserted data back from DynamoDB
Item item = this.dynamoDb.getTable(DYNAMODB_TABLE_NAME).getItem("id", personRequest.getId(), "id, firstName, lastName, age, address", null);
personResponse.setMessage("Saved Successfully-"+item.toJSON());
JSONObject responseBody = new JSONObject();
responseBody.put("message", item.toJSON());
JSONObject headerJson = new JSONObject();
headerJson.put("x-custom-header", "custom header value");
responseJson.put("isBase64Encoded", false);
responseJson.put("statusCode", responseCode);
responseJson.put("headers", headerJson);
responseJson.put("body", responseBody.toString());
}
catch (Exception e) {
System.err.println("GetItem failed.");
System.err.println(e.getMessage());
}
return responseJson;
}
