Example usage for io.netty.util.concurrent Promise cause

Introduction

In this page you can find the example usage for io.netty.util.concurrent Promise cause.

Prototype

Throwable cause();

Source Link

Document

Returns the cause of the failed I/O operation if the I/O operation has failed.

Usage

From source file:com.linecorp.armeria.common.RequestContext.java

License:Apache License

/**
 * Resolves the specified {@code promise} with the specified {@code result} so that the {@code promise} is
 * marked as 'done'. If {@code promise} is done already, this method does the following:
 * <ul>/* w ww .  j  av a  2 s .  c om*/
 *   <li>Log a warning about the failure, and</li>
 *   <li>Release {@code result} if it is {@linkplain ReferenceCounted a reference-counted object},
 *       such as {@link ByteBuf} and {@link FullHttpResponse}.</li>
 * </ul>
 * Note that a {@link Promise} can be done already even if you did not call this method in the following
 * cases:
 * <ul>
 *   <li>Invocation timeout - The invocation associated with the {@link Promise} has been timed out.</li>
 *   <li>User error - A service implementation called any of the following methods more than once:
 *     <ul>
 *       <li>{@link #resolvePromise(Promise, Object)}</li>
 *       <li>{@link #rejectPromise(Promise, Throwable)}</li>
 *       <li>{@link Promise#setSuccess(Object)}</li>
 *       <li>{@link Promise#setFailure(Throwable)}</li>
 *       <li>{@link Promise#cancel(boolean)}</li>
 *     </ul>
 *   </li>
 * </ul>
 */
@Deprecated
default void resolvePromise(Promise<?> promise, Object result) {
    @SuppressWarnings("unchecked")
    final Promise<Object> castPromise = (Promise<Object>) promise;

    if (castPromise.trySuccess(result)) {
        // Resolved successfully.
        return;
    }

    try {
        if (!(promise.cause() instanceof TimeoutException)) {
            // Log resolve failure unless it is due to a timeout.
            LoggerFactory.getLogger(RequestContext.class)
                    .warn("Failed to resolve a completed promise ({}) with {}", promise, result);
        }
    } finally {
        ReferenceCountUtil.safeRelease(result);
    }
}

---

From source file:com.linecorp.armeria.common.RequestContext.java

License:Apache License

/**
 * Rejects the specified {@code promise} with the specified {@code cause}. If {@code promise} is done
 * already, this method logs a warning about the failure. Note that a {@link Promise} can be done already
 * even if you did not call this method in the following cases:
 * <ul>/*from   ww w.  ja v a2 s. c om*/
 *   <li>Invocation timeout - The invocation associated with the {@link Promise} has been timed out.</li>
 *   <li>User error - A service implementation called any of the following methods more than once:
 *     <ul>
 *       <li>{@link #resolvePromise(Promise, Object)}</li>
 *       <li>{@link #rejectPromise(Promise, Throwable)}</li>
 *       <li>{@link Promise#setSuccess(Object)}</li>
 *       <li>{@link Promise#setFailure(Throwable)}</li>
 *       <li>{@link Promise#cancel(boolean)}</li>
 *     </ul>
 *   </li>
 * </ul>
 */
@Deprecated
default void rejectPromise(Promise<?> promise, Throwable cause) {
    if (promise.tryFailure(cause)) {
        // Fulfilled successfully.
        return;
    }

    final Throwable firstCause = promise.cause();
    if (firstCause instanceof TimeoutException) {
        // Timed out already.
        return;
    }

    if (Exceptions.isExpected(cause)) {
        // The exception that was thrown after firstCause (often a transport-layer exception)
        // was a usual expected exception, not an error.
        return;
    }

    LoggerFactory.getLogger(RequestContext.class).warn("Failed to reject a completed promise ({}) with {}",
            promise, cause, cause);
}

---

From source file:com.linecorp.armeria.common.ServiceInvocationContext.java

License:Apache License

/**
 * Resolves the specified {@code promise} with the specified {@code result} so that the {@code promise} is
 * marked as 'done'. If {@code promise} is done already, this method does the following:
 * <ul>//w  w w.ja v a  2 s .  c om
 *   <li>Log a warning about the failure, and</li>
 *   <li>Release {@code result} if it is {@linkplain ReferenceCounted a reference-counted object},
 *       such as {@link ByteBuf} and {@link FullHttpResponse}.</li>
 * </ul>
 * Note that a {@link Promise} can be done already even if you did not call this method in the following
 * cases:
 * <ul>
 *   <li>Invocation timeout - The invocation associated with the {@link Promise} has been timed out.</li>
 *   <li>User error - A service implementation called any of the following methods more than once:
 *     <ul>
 *       <li>{@link #resolvePromise(Promise, Object)}</li>
 *       <li>{@link #rejectPromise(Promise, Throwable)}</li>
 *       <li>{@link Promise#setSuccess(Object)}</li>
 *       <li>{@link Promise#setFailure(Throwable)}</li>
 *       <li>{@link Promise#cancel(boolean)}</li>
 *     </ul>
 *   </li>
 * </ul>
 */
public void resolvePromise(Promise<?> promise, Object result) {
    @SuppressWarnings("unchecked")
    final Promise<Object> castPromise = (Promise<Object>) promise;

    if (castPromise.trySuccess(result)) {
        // Resolved successfully.
        return;
    }

    try {
        if (!(promise.cause() instanceof TimeoutException)) {
            // Log resolve failure unless it is due to a timeout.
            logger().warn("Failed to resolve a completed promise ({}) with {}", promise, result);
        }
    } finally {
        ReferenceCountUtil.safeRelease(result);
    }
}

---

From source file:com.linecorp.armeria.common.ServiceInvocationContext.java

License:Apache License

/**
 * Rejects the specified {@code promise} with the specified {@code cause}. If {@code promise} is done
 * already, this method logs a warning about the failure. Note that a {@link Promise} can be done already
 * even if you did not call this method in the following cases:
 * <ul>//w w w .j a  v a  2  s.co m
 *   <li>Invocation timeout - The invocation associated with the {@link Promise} has been timed out.</li>
 *   <li>User error - A service implementation called any of the following methods more than once:
 *     <ul>
 *       <li>{@link #resolvePromise(Promise, Object)}</li>
 *       <li>{@link #rejectPromise(Promise, Throwable)}</li>
 *       <li>{@link Promise#setSuccess(Object)}</li>
 *       <li>{@link Promise#setFailure(Throwable)}</li>
 *       <li>{@link Promise#cancel(boolean)}</li>
 *     </ul>
 *   </li>
 * </ul>
 */
public void rejectPromise(Promise<?> promise, Throwable cause) {
    if (promise.tryFailure(cause)) {
        // Fulfilled successfully.
        return;
    }

    final Throwable firstCause = promise.cause();
    if (firstCause instanceof TimeoutException) {
        // Timed out already.
        return;
    }

    if (Exceptions.isExpected(cause)) {
        // The exception that was thrown after firstCause (often a transport-layer exception)
        // was a usual expected exception, not an error.
        return;
    }

    logger().warn("Failed to reject a completed promise ({}) with {}", promise, cause, cause);
}

---