[JAVA] Thread-safe collections(동기화된 콜렉션 선언)

리스트

private List<String> forceInsertItemCdList = Collections.synchronizedList(new ArrayList<>());

 

내부 코드

/**
 * Returns a synchronized (thread-safe) list backed by the specified
 * list.  In order to guarantee serial access, it is critical that
 * <strong>all</strong> access to the backing list is accomplished
 * through the returned list.<p>
 *
 * It is imperative that the user manually synchronize on the returned
 * list when iterating over it:
 * <pre>
 *  List list = Collections.synchronizedList(new ArrayList());
 *      ...
 *  synchronized (list) {
 *      Iterator i = list.iterator(); // Must be in synchronized block
 *      while (i.hasNext())
 *          foo(i.next());
 *  }
 * </pre>
 * Failure to follow this advice may result in non-deterministic behavior.
 *
 * <p>The returned list will be serializable if the specified list is
 * serializable.
 *
 * @param  <T> the class of the objects in the list
 * @param  list the list to be "wrapped" in a synchronized list.
 * @return a synchronized view of the specified list.
 */
public static <T> List<T> synchronizedList(List<T> list) {
    return (list instanceof RandomAccess ?
            new SynchronizedRandomAccessList<>(list) :
            new SynchronizedList<>(list));
}

 

선언하면 내부적으로 동기화된 리스트로 선언하도록 구성되어 있음.

 

 

더 자세하고 여러 콜렉션에 대해 보고 싶으면  아래 두 개 보면 됨

https://dveamer.github.io/backend/JavaConcurrentCollections.html

Dveamer

 

https://cornswrold.tistory.com/209

[JAVA] 동기화된 컬렉션(thread-safe collection), 병렬처리 가능한 컬렉션