Is dispose thread-safe?
Within that lock, you could safely check to see if your object is disposed and throw an ObjectDisposedException if it is. To avoid the overhead of those locks, even our otherwise thread-safe objects have a disclaimer about the Dispose method: “This class is thread-safe except for Dispose, which is thread-compatible.
Is Readonlycollection thread-safe?
Enumerating through a not-really-read-only collection is intrinsically not thread-safe for the same reasons that even in a single-threaded scenario you cannot modify a collection while enumerating it.
Is ImmutableList thread safe?
People may be surprised that ImmutableList is threadsafe while ImmutableList. Builder isn’t.
Is Guava Immutablemap thread-safe?
While the Guava Immutable classes are threadsafe, their builders are not. For most applications, only one thread will interact with any particular Builder instance. While the absence of thread-safety usually doesn’t need to be documented, such Javadoc might make sense for the Immutable collection builders.
How do I know if a class is thread-safe?
For a standard Java SE class, the best way to know whether or not the class is thread-safe is to carefully read its documentation. Always read both the class documentation and the method documentation. If either say it’s not synchronized or not thread-safe, you know it’s not thread-safe.
How do I return IReadOnlyList?
List can be cast as IReadOnlyList so you don’t have to change anything else inside your method. You can create a List just as you are now, but return it as an IReadOnlyList just by changing the return type of the function. That probably accomplishes what you need.
How can you tell if something is thread-safe?
To test if the combination of two methods, a and b, is thread-safe, call them from two different threads. Put the complete test in a while loop iterating over all thread interleavings with the help from the class AllInterleavings from vmlens. Test if the result is either an after b or b after a.
Is ImmutableList thread-safe?
Which class is not thread-safe?
When designing a class that may be used for concurrent programming—that is, a class whose instances may be used by more than one thread at a time—it is imperative that you make sure the class is ” thread-safe.” Consider the IntList class of Example 2-7. This class is not thread safe.
How do you ensure thread safety?
There are basically four ways to make variable access safe in shared-memory concurrency:
- Confinement. Don’t share the variable between threads.
- Immutability. Make the shared data immutable.
- Threadsafe data type.
- Synchronization.
Why IEnumerable is faster than List?
We aren’t forcing the caller to convert their data structure to a List unnecessarily. So it isn’t that IEnumerable is more efficient than list in a “performance” or “runtime” aspect. It’s that IEnumerable is a more efficient design construct because it’s a more specific indication of what your design requires.
Which makes class a thread-safe?
To make these classes thread-safe, you must prevent concurrent access to the internal state of an instance by more than one thread. Because Java was designed with threads in mind, the language provides the synchronized modifier, which does just that.
Which of the following are thread-safe?
Answer: Since String is immutable in Java, it’s inherently thread-safe.
How do you know if something is thread-safe?
In general, when we say “a method is thread-safe” when there is no race-condition to the internal and external data structure of the object it belongs to. In other words, the order of the method calls are strictly enforced.