My problem is: i have a function triggered by a daily Timer that is supposed to send emails to a list of addresses stored in a database, even the text of the email is an array of datas retrieved by queries in a database. The function doesn't have inputs, nor outputs (if we don't consider the text of the email, that is directly sent by the function). How am i supposed to create a set of blackbox test cases for something like this?
There are at least two ways of writing tests for these code.
You can use an in-memory database and an in-memory IMAP- or SMTP-server. Add data to the database. Configure your function to use that database and the email server. Run your function and check the inbox of the email server.
You can mock the database and the emailserver and inject them into the function's class.
Related
I send JSON's to my app via Postman in a list with a type of mapping(CRUD) to send it to my database.
I want my controller to put all this data, from multiple senders, in a list that will send the information to my DB. The problem is that i don't know how to store in the same list the Json and the Mapping, so when my threads do their work to know if that json must be inserted, updated, deleted and so on.
Do you guys have any ideea ?
PS: It is a spring-boot app that need to be able to send 12000 objects ( made from that jsons ) to the db.
I don't see a reason for putting all data in one list and sharing it later, each HTTP request receives own thread.
On decent server you can handle couple thousands of requests/sec which perform simple CRUD operations.
I want to populate differnt forms and GUIs from a Datatable which i fill from a MySQL Database. All this should happen through a backgroundworker. I do know that I can not populate data on another form if it was obtained on another thread (BGW).
Is there a way how I can generically fetch data from the SQL-DB, write it into my Datatable and print it on any form and any GUI that I have in my project?
Where to start reading?
edit:
So far i do have a user-control which does connect to the DB, retrieve the requested data and passes it in form of a data table to a function. this function populates a datagridview on the main form and also passes the data to other functions and forms in the project. As i understood the backgroundworker tutorials i read till now, it would not be possible to populate/write the data on ANY form in the project. Because each time i want to write the data into a e.g. textbox i need to
invoke the data because it was obtained on another thread.
in my case these would be dozens of controls on different forms. and this is where i am stuck. basically im looking for a generic way to invoke all data in the datatable one time and from there on i can write it to any user-control i wish. is that anyhow possible?
How can I retrieve the number of API invocations? I know the data has to be somewhere because wso2 BAM shows piecharts with similar data...
I would like to get that number in a mediation sequencel; is that possible? Might this might be achieved via a DB-lookup?
The way how API Usage Monitoring in WSO2 API Manager works is, there is an API handler (org.wso2.carbon.apimgt.usage.publisher.APIUsageHandler) that gets invoked for each request and response passing through the API gateway. In this handler all pertinent information with regard to API usage is published to the WSO2 BAM server. The WSO2 BAM server persists this data in Cassandra database that is shipped with it. Then there is a BAM Toolbox that has been packaged with required analytic scripts written using Apache Hive that can be installed on the BAM server. These scripts would summarize the data periodically and persist the summarized data to an sql database. So the graphs and charts shown in the API Publisher web application are created using the summarized data from the sql database.
Now, if what you require is extractable from these summarized sql tables then i suppose the process is very straight forward. You could use the DBLookup mediator for this. But if some dimension of the data which you need has been lost due to the summarizing, then you will have a little more work to do.
You have two options.
The easiest approach which involves no coding at all would be to write a custom Hive script that suits your requirement and summarize data to a sql table. Then, like before use a DBLookup mediator to read the data. You can look at the existing Hive scripts that are shipped with the product to get an idea of how it is written.
If you dont want BAM in the picture, you still can do it with minimal coding as follows. The implementation class which performs the publishing is org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageDataBridgeDataPublisher. This class implements the interface org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageDataPublisher. The interface has three instace methods as follows.
public void init()
public void publishEvent(RequestPublisherDTO requestPublisherDTO)
public void publishEvent(ResponsePublisherDTO responsePublisherDTO)
The init() method runs just once during server startup. Here is where you can add all your logic which is needed to bootstrap the class.
The publishEvent(RequestPublisherDTO) is where you publish request events and publishEvent(ResponsePublisherDTO) is where you publish response events. The DTO objects are encapsulated representations of the request and response data respectively.
What you will have to do is write a new implementation for this interface and configure it as the value for DataPublisherImpl property in api-manager.xml. To make things easier you can simply extends the exsiting org.wso2.carbon.apimgt.usage.publisher.APIMgtUsageDataBridgeDataPublisher, write your necessary logic to persist usage data to an sql database within the init(), publishEvent(RequestPublisherDTO) and publishEvent(ResponsePublisherDTO) and at the end of each method just call its respective super class method.
E.g. the overriding init() will call super().init(). This way you are only adding the neccessary code for your requirement, and leaving the BAM stat collection requirement to the super class.
I am trying to validate that a username is unique on a registration form and would like to verify the uniqueness of the username right after the client types it as opposed to performing this server side after the form has been submitted.
Should I collect a resultSet from the database, store it in an array and then pass this along to the jsp page in the form of a bean (I am using a model 2 design so the user passes through a servlet before arriving at the jsp page)? What if the array is very large? How do I bring this data into javascript?
Alternatively, is there a way to do the query using ajax and javascript all on the client side? Maybe its possible to somehow run the query in the background?
I am really just looking for some direction because I am clueless as to what to even begin researching something like this. Is this even a smart move, performance wise?
I'd use "AJAX" for this.
Here's one approach: set up a blur() handler on the username text field of your form. When the blur() method is invoked, you post the username to the backend code; it verifies it and returns some appropriate response. You then parse the response and change the CSS class on the username text field (e.g., turning it red) -- or do whatever else visually you want to do to indicate "username in use."
Either way, you've got to get the username from the client to the server for verification; you wouldn't want any mechanism which allowed the client to directly use the DB (think security/exploits/etc).
If you're not already familiar, check out jQuery (http://jquery.com/) to make your client-side life much easier.
I don't understand. I have searched all internet forums but found nothing helpful. I am trying to update the numberOfLikes field on my postsTable in MySql when the user clicks on the like button. I know this is done through ajax but I am only familiar with prototype ajax and none internet forums state anything about it.
Here's the flow chart
1. On "seeForums.php" user clicks on the "like" link.
2. The like link has an id that triggers the function which updates numberOfLikes on my postsTable.
Thats it. Thats all I need. But I need it in a prototype ajax format, something like this.
function processLikes()
{
new Ajax.Request(theUrl,
{
contentType:"text/HTML",
onSuccess:updateLikesMySql,
onFailure:error
onException:error,
});
}
Helps are appreciated :)
You can't do this with Javascript alone as it is client side only, you'll need to get a server side language (e.g. PHP) involved as well.
The idea is that you send an AJAX request to your PHP file along with the data that you want to update, and your PHP file will handle inserting values into the database. That PHP file would then print an output (e.g. success or failure) which would be received in your Javascript so you can act accordingly.
You should know that the nature of HTTP (web) makes it Request/Response like.
So your backend code runs on the server,
And javascript and all frontend code run on the client.
Client has no access to your database, So you can't do anything to your database with Javascript.
Best thing you can do is ask your serve with javascript to update the database,
Make a server-side script available at some URL,
Then use ajax to call that URL.
In the server-side script, do the code which updates the database.