Examples with MCRTransactionableCallable org.mycore.util.concurrent.MCRTransactionableCallable used on opensource projects

Example 1 with MCRTransactionableCallable

use of org.mycore.util.concurrent.MCRTransactionableCallable in project mycore by MyCoRe-Org.

the class MCRMetadataHistoryCommands method buildHistory.

@MCRCommand(syntax = "build metadata history of base {0}", help = "build metadata history of all objects with base id {0}")
public static List<String> buildHistory(String baseId) {
    MCRMetadataStore store = MCRXMLMetadataManager.instance().getStore(baseId);
    if (store instanceof MCRVersioningMetadataStore) {
        LogManager.getLogger().info("Verify SVN history of {}", baseId);
        ((MCRVersioningMetadataStore) store).verify();
    }
    ExecutorService executorService = Executors.newWorkStealingPool();
    MCRSession currentSession = MCRSessionMgr.getCurrentSession();
    int maxId = store.getHighestStoredID();
    AtomicInteger completed = new AtomicInteger(maxId);
    IntStream.rangeClosed(1, maxId).parallel().mapToObj(i -> MCRObjectID.formatID(baseId, i)).map(MCRObjectID::getInstance).map(id -> new MCRTransactionableCallable<>(Executors.callable(() -> {
        EntityManager em = MCREntityManagerProvider.getCurrentEntityManager();
        getHistoryItems(id).sequential().forEach(em::persist);
        completed.decrementAndGet();
    }), currentSession)).forEach(executorService::submit);
    executorService.shutdown();
    boolean waitToFinish = true;
    while (!executorService.isTerminated() && waitToFinish) {
        LogManager.getLogger().info("Waiting for history of {} objects/derivates.", completed.get());
        try {
            executorService.awaitTermination(10, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            waitToFinish = false;
        }
    }
    return Collections.emptyList();
}