Davor war der Umgang mit asynchronem Code jedoch deutlich komplexer und schwieriger.

In früheren Versionen von Python hätten Sie Threads oder <a href="https://www.gevent.org/" class="external-link" target="_blank">Gevent</a> verwenden können. Der Code ist jedoch viel komplexer zu verstehen, zu debuggen und nachzuvollziehen.

        if (to == FAILED) {
          enqueueFailedEvent(service);
        }

        if (states.count(RUNNING) == numberOfServices) {
          // This means that the manager is currently healthy. N.B. If other threads call isHealthy
          // they are not guaranteed to get 'true', because any service could fail right now.
          enqueueHealthyEvent();

 * {@link Map} specified in the {@link Table} interface.
 *
 * <p>Note that this implementation is not synchronized. If multiple threads access this table
 * concurrently and one of the threads modifies the table, it must be synchronized externally.
 *
 * <p>See the Guava User Guide article on <a href=

            SingletonLaContainerFactory.setExternalContextComponentDefRegister(new GenericExternalContextComponentDefRegister());
            SingletonLaContainerFactory.init();

            final Thread shutdownCallback = new Thread("ShutdownHook") {
                @Override
                public void run() {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Destroying LaContainer..");

  private val forbiddenLocks = mutableListOf<Any>()

  /** The timestamp of the last taken event, used to measure elapsed time between events. */
  private var lastTimestampNs: Long? = null

  /** Confirm that the thread does not hold a lock on `lock` during the callback. */
  fun forbidLock(lock: Any) {
    forbiddenLocks.add(lock)
  }

  /**

            return null;
        }
    }

    private void loadTestProperties() {
        // Load system.properties from test classpath
        try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("system.properties")) {
            if (is != null) {
                Properties props = new Properties();
                props.load(is);

        this.attrs = attrs;
        this.options = options;
        this.tree = tree.acquire();
        this.tree_num = tree.getTreeId();

        if (cfg.isTraceResourceUsage()) {
            this.creationBacktrace = Thread.currentThread().getStackTrace();
        } else {
            this.creationBacktrace = null;
        }
    }

    /**
     * @param cfg
     * @param fid
     * @param tree
     * @param unc

            try {
                // Wait before retry (except first attempt)
                if (attempt > 0) {
                    long delay = retryDelay * (1L << attempt); // Exponential backoff
                    Thread.sleep(delay);
                    log.debug("Reconnection attempt {} for {}", attempt + 1, info.getPath());
                }

                // Perform the actual reconnection

 * This class encapsulates HTTP request parameters that can have multiple values,
 * such as query parameters, form parameters, or other request-related data.
 *
 * <p>This class is immutable and thread-safe. Once created, the parameter name
 * and values cannot be modified.</p>
 *
 */
public class RequestParameter {

    /** The name of the request parameter. */
    private final String name;

import org.apache.maven.wagon.providers.file.FileWagon;
import org.apache.maven.wagon.resource.Resource;

/**
 * Wagon used for test cases that annotate some methods. Note that this is not a thread-safe implementation.
 */
public class TestFileWagon extends FileWagon {
    private TestTransferListener testTransferListener;
    private boolean insideGet;

    @Deprecated