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I am reading about the Dynamic Data Exchange protocol on MSDN. It uses global atom tables to share data between applications.
My questions are:
What would happen if a DDE link between two application is interrupted or terminated? If it was interrupted, can we continue it with the same link? Would data be lost?
When a DDE connection is closed, what would happen to the atom table created to exchange data?
It would be great if someone can explain, or direct me to an article to read and further understand the DDE protocol.
If you still want to use DDE you should use DDEML. With this functions you get handles or ids to registered objects.
MS always recommended to use DDEML after it was introduced and to not use the pre DDE interface. If connections got broken, you have to reconnect.
If you allocate/register/aquire elements you have to free them, even if things fail. This includes also the complete internal string handling.
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I don't understand what exactly Hawtio does.
If you could give an introduction to Hawtio:
What exactly is it?
What added value does it gives me as a Camel\ Spring developer?
Please explain what Hawtio is.
Hawtio a monitoring web console for java application. its popular usage is with apache camel . It visualizes the data it receives from jmx. Jolokia takes over the process of getting the data from jmx and acts as a new bridge. With Hawtio you can do the following items and much more.
How many times has the route worked (live reload)?
Show Jvm parameters
Heap objects and count
How many errors were received?
How many transactions were successful?
Eip of java code
Changing log level
Changing camel component attribütes
etc
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I have a server with Symfony RESTful, I want to access from another server with Symfony.
I have seen some examples of php that are accessed with curl or file_get_contents, but I can't find a document for Symfony where it explains the configuration, class organization, bundle to use. There is a lot of documentation on the RESTful API, but not from the querying party.
I need to know how the query is made and how the response is handled, without reinventing the wheel.
Can you recommend a document that explains a standard organization or which bundle is usually used?
I am using Symfony 4.4
The documentation on how to access a RESTful API is written by the creator of said API. If that's you then only you know what requests to send to what route and what data to expect. You can use the API for your back end and you can have multiple front end applications that connect to it. They would all connect the same way - the way you determine. You can start of by setting up a standard RESTful API. From there it all depends on your needs. That's why you cannot find documentation for this.
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Does a simple & working "Hello World!" GraphQL server code in Go exist?
There is a deficiency in tutorials concerning that topic, especially because graphql-go/graphql is currently a work-in-progress.
I've actually spent a bit of time this weekend creating a golang graphql server for a presentation upcoming this week, that has nothing to do with golang graphql. I don't know any golang, and never put together a server, I also threw in Neo4j, it's been an adventure, the hello world example is the following;
https://github.com/graphql-go/graphql/blob/master/examples/hello-world/main.go
In addition I used graphql-go/handler to create an endpoint;
https://github.com/graphql-go/handler
Finally added graphiql in order to check out my queries;
https://github.com/mnmtanish/go-graphiql
I started with getting the hello world example to be visible in go-graphiql, but using the handler to expose the schema.
The most stared project is https://github.com/graphql-go/graphql but it seems to be not actively developed.
I've been keeping an eye to this implementation that looks promising:https://github.com/neelance/graphql-go
a new repo that I still need to check: https://github.com/playlyfe/go-graphql
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I have a very basic question.Please help me in understanding this.
What is actually JMS? How we need to configure it ?
Recently I heard from one of my colleague that in JMS,the XML tags will not be represented as "<" and ">" rather it would be as "ampersand+lt;" and "ampersand+gt;". Is that true?
I have tried to understand JMS concepts.But could not get a clear picture.
Could someone explain in simple way.
Well you have got the concept wrong, which is already pointed out in the comments... Anyway, you can put XML in a JMS message body and send that JMS message to a messaging engine. XML could be put in the JMS text message as is and no changes are required, like the one you have mentioned.
One of the reasons your colleague could have told you this is because the receiver of the JMS message might want the XML is some format.
JMS is a messaging API and XML is a markup language.
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We are looking to fetch a list of open proxies with the intention of disallowing messages originating from those IPs to go through our system. There doesn't seem to be anything even resembling an authoritative list on the net, let alone being in a simple format that doesn't require parsing.
Has anybody done anything like this before and, if so, how did you deal with it?
You're doomed to failure -- proxies move around and change constantly. There can be no list that will ever have a significant number of them on it. There are also things like tor, which allow anyone to become a proxy for a hidden network of users.
Generally to cope with this sort of situation, you set up your server to deny access to IPs that are hitting you with too much traffic, or some other metric that indicates they're up to no good.
Just probe the incoming IP. That's what most IRC networks do to stop proxies connecting to them.