Guys is copyOnwriteArrayList blocking or?

Question

Java

skittles

Guys is copyOnwriteArrayList blocking or?

0

21.06.2021

10 ответов

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skittles Автор вопроса

Roy
you mean thread safe?

Not just that

0

21.06.2021

Nader Jafari

Its just regular ArrayList but thread safe

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21.06.2021

Dmytro Buryak

Yes, it's blocking. Blocks on all writes. And I found that out by just looking at the code. I don't know any other way to find it out if that is not specified in the docs.

0

21.06.2021

skittles Автор вопроса

Dmytro Buryak
Yes, it's blocking. Blocks on all writes. And I f...

lol you took liberty to look at the code XD

0

21.06.2021

Dmytro Buryak

Nader Jafari
Its just regular ArrayList but thread safe

If only that "but thread safe" was a simple annotation you put on a class, and boom - it magically becomes thread safe))) But it's not. And the main part of the story is that there many different ways to make it thread safe. CopyOnWrite principle is one of such ways, but it's not the only one. And it works differently from let's say Collections.SynchronizedList.

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21.06.2021

Dmytro Buryak

skittles
lol you took liberty to look at the code XD

I have my IDE in front of me, and giving it a glance is even faster than writing you back))

0

21.06.2021

skittles Автор вопроса

Dmytro Buryak
If only that "but thread safe" was a simple annota...

btw i am read it somewhere that it does not blocks

0

21.06.2021

Nader Jafari

Dmytro Buryak
If only that "but thread safe" was a simple annota...

doesnt change the fact that is ArrayList but thread safe

0

21.06.2021

Dmytro Buryak

Nader Jafari
doesnt change the fact that is ArrayList but thre...

Right. You can say the same that Collections.SynchronizedMap and ConcurrentHashMap are both maps but thread safe. Both designed to be thread safe. But they behave very differently in terms of performance and some specific behavior when you use them. And that's exactly what original question was about. It was not whether it's thread safe or not. But it was about how it behaves.

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21.06.2021

Roy · Accepted Answer

Roy

you mean thread safe?

0

21.06.2021

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