sense | Demo app that subscribes to Twitter | Websocket library
kandi X-RAY | sense Summary
kandi X-RAY | sense Summary
Demo app that subscribes to Twitter and publishes messages between tiny services to parse the data and display it on a JavaFX Dashboard.
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Top functions reviewed by kandi - BETA
- Initialise the graph
- Gets the leaderboard controller
- Gets the hold controller
- Gets the wish controller
- Initialize the user s security token
- Validate properties
- Loads the OAuth properties from the properties file
- Hook for a tweet
- Checks to see if this object is happy
- Handles an error
- Sets the minute to zero
- Parses tweets as a tweet
- Stop the server
- Analyzes a tweet and returns a CSV list of all of its types
- Handles a full Tweet message
- Get the number of tweets
- On close
- Returns a new Thread initialized with the given Runnable
- Obtains a single endpoint instance
- Send message to client
- Handles tweets
- Uses Twitter data
- Called when a Twitter message is received
- Initialize the tick label
- Gets twitter handle from full tweet
- Stops the server
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Community Discussions
Trending Discussions on sense
QUESTION
I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).
However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.
I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.
To illustrate this, consider the following code:
...ANSWER
Answered 2021-May-03 at 20:22There is a difference between a file and a file descriptor (FD).
All processes share the same files. They don't necessarily have access to the same files, and a file is not its name, either; two different processes which open the same name might not actually open the same file, for example if the first file were renamed or unlinked and a new file were associated with the name. But if they do open the same file, it's necessarily shared, and changes will be mutually visible.
But a file descriptor is not a file. It refers to a file (not a filename, see above), but it also contains other information, including a file position used for and updated by calls to read
and write
. (You can use "positioned" read and write, pread
and pwrite
, if you don't want to use the position in the FD.) File descriptors are shared between parent and child processes, and so the file position in the FD is also shared.
Another thing stored in the file descriptor (in the kernel, where user processes can't get at it) is the list of permitted actions (on Unix, read, write, and/or execute, and possibly others). Permissions are stored in the file directory, not in the file itself, and the requested permissions are copied into the file descriptor when the file is opened (if the permissions are available.) It's possible for a child process to have a different user or group than the parent, particularly if the parent is started with augmented permissions but drops them before spawning the child. A file descriptor for a file opened in this manner still has the same permissions uf it is shared with a child, even if the child would itself be able to open the file.
QUESTION
I am querying a database for an item using R2DBC and Spring Integration. I want to extend the transaction boundary a bit to include a handler - if the handler fails I want to roll back the database operation. But I'm having difficulty even establishing transactionality explicitly in my integration flow. The flow is defined as
...ANSWER
Answered 2021-Jun-15 at 18:32Well, it's indeed not possible that declarative way since we don't have hook for injecting to the reactive type in the middle on that level.
Try to look into a TransactionalOperator
and its usage from the Java DSL's fluxTransform()
:
QUESTION
I'm trying to understand how the "fetch" phase of the CPU pipeline interacts with memory.
Let's say I have these instructions:
...ANSWER
Answered 2021-Jun-15 at 16:34It varies between implementations, but generally, this is managed by the cache coherency protocol of the multiprocessor. In simplest terms, what happens is that when CPU1 writes to a memory location, that location will be invalidated in every other cache in the system. So that write will invalidate the line in CPU2's instruction cache as well as any (partially) decoded instructions in CPU2's uop cache (if it has such a thing). So when CPU2 goes to fetch/execute the next instruction, all those caches will miss and it will stall while things are refetched. Depending on the cache coherency protocol, that may involve waiting for the write to get to memory, or may fetch the modified data directly from CPU1's dcache, or things might go via some shared cache.
QUESTION
I have a question about how rebasing works in git, in part because whenever I ask other devs questions about it I get vague, abstract, high level "architect-y speak" that doesn't make a whole lot of sense to me.
It sounds as if rebasing "replays" commits, one after another (so sequentially) from the source branch over the changes in my working branch, is this the case? So if I have a feature branch, say, feature/xyz-123
that was cut from develop
originally, and then I rebase from origin/develop
, then it replays all the commits made to develop
since I branched off of it. Furthermore, it does so, one develop
commit at a time, until all the changes have been "replayed" into my feature branch, yes?
If anything I have said above is incorrect or misled, please begin by correcting me! But assuming I'm more or less correct, I'm not seeing how this is any different than merging in changes from develop
by doing a git merge develop
. Don't both methods result with all the latest changes from develop
making their way into feature/xyz-123
?
I'm sure this is not the case but I'm just not seeing the forest through the trees here. If someone could give a concrete example (with perhaps some mock commits and git command line invocations) I might be able to understand the difference in how rebase works versus a merge. Thanks in advance!
...ANSWER
Answered 2021-Jun-15 at 13:22" It sounds as if rebasing "replays" commits, one after another (so sequentially) from the source branch over the changes in my working branch, is this the case? "
Yes.
" Furthermore, it does so, one develop commit at a time, until all the changes have been "replayed" into my feature branch, yes? "
No, it's the contrary. If you rebase your branch on origin/develop
, all your branch's commits are to be replayed on top of origin/develop
, not the other way around.
Finally, the difference between merge and rebase scenarios has been described in details everywhere, including on this site, but very broadly the merge workflow will add a merge commit to history. For that last part, take a look here for a start.
QUESTION
How to invoke a class from a variable in flutter?
...ANSWER
Answered 2021-Jun-15 at 12:11It's not possible to create an instance of a class from a Type object representing the class.
For more information check out this link: Flutter - How to instantiate an object from a Type
QUESTION
Good afternoon ,
Assume we have the following :
...ANSWER
Answered 2021-Jun-15 at 11:01Maybe this is simpler?
QUESTION
I am writing code to answer the following LeetCode question:
Given the head of a linked list and an integer
Example 1 ...val
, remove all the nodes of the linked list that hasNode.val == val
, and return the new head
ANSWER
Answered 2021-Jun-15 at 10:52Some issues in your code (as it was first posted):
return skipper(prev,curr)
is going to exit the loop, but there might be more nodes to be removed further down the list.skipper
only takes care of a sub sequence consisting of the same value, but it will not look beyond that. The list is not necessarily sorted, so the occurrences of the value are not necessarily grouped together.Be aware that the variable
prev
inskipper
is not the same variable as the other, outerprev
. So the assignmentprev=curr
inskipper
is quite uselessUnless the list starts with the searched value,
dummy.next
will always remainNone
, which is what the function returns. You should initialisedummy
so it links tohead
as its next node. In your updated code you took care of this, but it is done in an obscure way (in theelse
part).dummy
should just be initialised as the head of the whole list, so it is like any other node.
In your updated code, there some other problems as well:
while prev.next:
risks to be an infinite loop, because it continues whileprev
is not the very last node, but it also doesn't move forward in that list if its value is not equal to the searched value.
I would suggest doing this without the skipper
function. Your main loop can just deal with the cases where current.val == val
, one by one.
Here is the corrected code:
QUESTION
I have an ManagerCLass, which includes many other Objects. Here are methodes, that takes thes Objects and call an method on theses Objects.. Example:
...ANSWER
Answered 2021-Jun-15 at 10:00OK, so the real problem here is that you are using Java terminology incorrectly.
There are no member classes of the Manager
class. Yup. That's what I said!
A "member class" is a class that is declared inside another class. But there aren't any classes declared inside Manager
.
However, there are fields ("member fields") declared inside Manager
; i.e. classA
, classB
and so on. And these fields have classes; i.e. ClassA
, ClassB
and so on.
If you want to find the member fields of a class, use the Class.getDeclaredFields()
method. This will give you an array of Field
objects.
You can then get each field's class by calling Field.getType()
on it. Then you can use reflection to lookup the classses printResult()
method and invoke it on the value in the respective fields of a target object.
Notes:
The
Class
returned bygetType()
could denote a primitive type or array type rather than a class. ThisClass
will represent the erased type of the field.If you want the
Type
as it was declared in the source code, useField.getGenericType()
instead.
QUESTION
I've been redesigning a calculator for my website and there's a feature that I'd like to add to it. I have two divs next to each other and another div that I'd like to put in between them. I've been using the float function but nothing obvious seems to work. Aside from that, the div is supposed to contain two lines over and under text (I'll elaborate a bit more later) and I'm not sure what to do to achieve this, can someone please help?
Below is an image of what my issue is (red boxes are just to show the divs).
Below is what I'm trying to achieve (red boxes are just showing each div - not actually part of the design). I want a line above and below "OR" that separates the divs on either side and it has to resize relative to the size of the whole thing. For example: if the window is resized (if that makes sense).
If you need additional information then please ask.
...ANSWER
Answered 2021-May-27 at 11:33I wouldn't recommend you to use float since it has a strange behaviour sometimes. I would rather use flexboxes to achieve the layout.
1. Create the HTML Structure:
QUESTION
I'm trying to update a users data with context api - I got it working so it does it individually given there userId - so in this sense
If I want to update the users avatar image I can do
...ANSWER
Answered 2021-Jun-15 at 09:10You can write only one function to update user infor like this:
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Install sense
You can use sense like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the sense component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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