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docs: add explanation for balking pattern (#1685)

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* #590 explanation for balking pattern

* #590 fix checkstyle error

Co-authored-by: Subhrodip Mohanta <hello@subho.xyz>
This commit is contained in:
Ilkka Seppälä
2021-03-20 21:55:47 +02:00
committed by GitHub
parent b5ed8b2278
commit 2b7d181ac4
2 changed files with 127 additions and 14 deletions
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15
balking/src/main/java/com/iluwatar/balking/App.java
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@ -32,11 +32,11 @@ import lombok.extern.slf4j.Slf4j;
* then the method will return without doing anything. Objects that use this pattern are generally
* only in a state that is prone to balking temporarily but for an unknown amount of time
*
* <p>In this example implementation WashingMachine is an object that has two states in which it
* can be: ENABLED and WASHING. If the machine is ENABLED the state is changed into WASHING that any
* other thread can't invoke this action on this and then do the job. On the other hand if it have
* been already washing and any other thread execute wash() it can't do that once again and returns
* doing nothing.
* <p>In this example implementation, {@link WashingMachine} is an object that has two states in
* which it can be: ENABLED and WASHING. If the machine is ENABLED, the state changes to WASHING
* using a thread-safe method. On the other hand, if it already has been washing and any other
* thread executes {@link WashingMachine#wash()} it won't do that and returns without doing
* anything.
*/
@Slf4j
public class App {
@ -54,11 +54,12 @@ public class App {
}
executorService.shutdown();
try {
executorService.awaitTermination(10, TimeUnit.SECONDS);
if (!executorService.awaitTermination(10, TimeUnit.SECONDS)) {
executorService.shutdownNow();
}
} catch (InterruptedException ie) {
LOGGER.error("ERROR: Waiting on executor service shutdown!");
Thread.currentThread().interrupt();
}
}
}