lock | manages locks , a mechanism to provide exclusive access | Web Framework library
kandi X-RAY | lock Summary
kandi X-RAY | lock Summary
The Lock component creates and manages locks, a mechanism to provide exclusive access to a shared resource.
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Top functions reviewed by kandi - BETA
- Create a store instance .
- Acquire a read lock .
- Save read data
- Updates a key .
- Get current timestamp statement
- Lock a key .
- Get value and cas .
- Initializes the class .
- Creates a zookeeper node .
- Filter DSN .
lock Key Features
lock Examples and Code Snippets
Lines of Code : 15License : Non-SPDX
Copy@Override
public boolean lock(@NonNull Creature creature) {
synchronized (synchronizer) {
LOGGER.info("{} is now trying to acquire {}!", creature.getName(), this.getName());
if (!isLocked()) {
locker = creature;
retu static FileLock getExclusiveLockFromFileChannelOpen(long from, long size) throws IOException {
Path path = Files.createTempFile("foo", "txt");
try (FileChannel channel = FileChannel.open(path, StandardOpenOption.APPEND); FileLock lock static FileLock getExclusiveLockFromRandomAccessFile(long from, long size) throws IOException {
Path path = Files.createTempFile("foo", "txt");
try (RandomAccessFile file = new RandomAccessFile(path.toFile(), "rw");
FileLo Community Discussions
Trending Discussions on lock
QUESTION
I wanted to insert my data to a specific sheet name based on form input value of "svdate":
...ANSWER
Answered 2021-Jun-16 at 02:12I thought that in your situation, it is required to retrieve 6/17 from 06/17/2021. For this, how about the following modification?
In this case, please modify doPost as follows.
QUESTION
Would be great if someone can help me understand how flock functions. Lets says I have the below scenario:
...ANSWER
Answered 2021-Jun-16 at 02:07I tried testing this scenarios with a working example script and I found that the waiting jobs are processed in a random manner.
QUESTION
I was following along with this tutorial on creating a concurrent counter struct for a usize value: ConcurrentCounter. As I understand it, this wrapper struct allows us to mutate our usize value, with more concise syntax, for example:my_counter.increment(1) vs. my_counter.lock().unwrap().increment(1).
Now in this tutorial our value is of type usize, but what if we wanted to use a f32, i32, or u32 value instead?
I thought that I could do this with generic type arguments:
...ANSWER
Answered 2021-Jun-15 at 23:55I haven't come across such a ConcurrentCounter library, but crates.io is huge, maybe you find something. However, if you are mostly concerned with primitives such as i32, there is a better alternative call: Atomics, definitely worth checking out.
Nevertheless, your approach of generalizing the ConcurrentCounter is going in a good direction. In the context of operation overloading, std::ops is worth a look. Specifically, you need Add, Sub, and Mul, respectively. Also, you need a Copy bound (alternatively, a Clone would also do). So you were pretty close:
QUESTION
I encountered the following error when I tried to install some new packages using npm install. It happened when I did npm install a-new-package --save and then delete package-lock.json file afterwards to refresh everything.
ANSWER
Answered 2021-Jun-15 at 18:59May be deleting node_modules folder and package-lock.json file and then reinstalling npm would resolve your issue.
So, consider the following commands to apply the above operations:
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 have a generator object, that loads quite big amount of data and hogs the I/O of the system. The data is too big to fit into memory all at once, hence the use of generator. And I have a consumer that all of the CPU to process the data yielded by generator. It does not consume much of other resources. Is it possible to interleave these tasks using threads?
For example I'd guess it is possible to run the simplified code below in 11 seconds.
...ANSWER
Answered 2021-Jun-15 at 16:02Send your data to separate processes. I used concurrent.futures because I like the simple interface.
This runs in about 11 seconds on my computer.
QUESTION
I am attempting to write a a UI test that taps on a delivered local notification after the device has been locked. I have been successful so far in tapping on a notification that was delivered on the springboard (when the device is already unlocked) but not from the lock screen. Does anyone know if this is possible?
Please note that this is different from questions such as this one, which merely hit the home button to leave the app under test and wait for the notification.
Here is the relevant portion of my test code:
...ANSWER
Answered 2021-Jun-15 at 14:49I have similar issues, and I was able to resolve them by Adding a press lock Again. Here is the working code. I am using https://github.com/pterodactyl for Notifications. I wrote this code a couple of years back and still passing.
I do the same thing twice and able to validate notifications. Once the device is locked. You will see a black screen like it is turned off, and the second time when you will send the same code, it will turn on the device, and you can get notifications element for tests
// Lock the screen
XCUIDevice.shared.perform(NSSelectorFromString("pressLockButton"))
sleep(1)// same command second time ,it will wake the screen
XCUIDevice.shared.perform(NSSelectorFromString("pressLockButton"))
QUESTION
I am trying to understand the example with incorrect sync code from The Go Memory Model.
...Double-checked locking is an attempt to avoid the overhead of synchronization. For example, the twoprint program might be incorrectly written as:
ANSWER
Answered 2021-Jun-14 at 19:18According to the Go memory model:
There are no guarantees that one goroutine will see the operations performed by another goroutine unless there is an explicit synchronization between the two using channels, mutex. etc.
In your example: the fact that a goroutines sees done=true does not imply it will see a set. This is only guaranteed if there is explicit synchronization between the goroutines.
The sync.Once probably offers such synchronization, so that's why you have not observed this behavior. There is still a memory race, and on a different platform with a different implementation of sync.Once, things may change.
QUESTION
So I am relatively new to programming, and I have been working on this task app, where I want to save the data such as task name and more, given by the user. I am trying to accomplish this using Room. Now, initially, when I tried to do it, the app would crash since I was doing everything on the main thread probably. So, after a little research, I came to AsyncTask, but that is outdated. Now finally I have come across the Executer. I created a class for it, but I am a little unsure as to how I can implement it in my app. This is what I did :
Entity Class :
...ANSWER
Answered 2021-Jun-14 at 12:03First make a Repository class and make an instance of your DAO
QUESTION
I made a node JS application using Hapi on Windows 10. After testing it locally, the script start would run without any problem. here is the start script inside the package.json
ANSWER
Answered 2021-Jun-15 at 10:13You need to quote the *: nodemon -e "*" src/server.js.
Unlike Windows' cmd, Linux shells expand wildcards (as you can see in the command actually run, above the error). In Windows it's up to the program you are calling to expand wildcards. Since that is what you want in case of nodemon, it worked "by chance" on Windows without escaping the asterisk because it doesn't have any special meaning to cmd, but in Linux it will get expanded and that's not what you want.
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No vulnerabilities reported
Install lock
PHP requires the Visual C runtime (CRT). The Microsoft Visual C++ Redistributable for Visual Studio 2019 is suitable for all these PHP versions, see visualstudio.microsoft.com. You MUST download the x86 CRT for PHP x86 builds and the x64 CRT for PHP x64 builds. The CRT installer supports the /quiet and /norestart command-line switches, so you can also script it.
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