本文整理匯總了Java中io.netty.util.concurrent.Promise.cause方法的典型用法代碼示例。如果您正苦於以下問題：Java Promise.cause方法的具體用法？Java Promise.cause怎麽用？Java Promise.cause使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類io.netty.util.concurrent.Promise的用法示例。
在下文中一共展示了Promise.cause方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: rejectPromise
import io.netty.util.concurrent.Promise; //導入方法依賴的package包/類
/**
* 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>
* <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 Use {@link CompletableFuture} instead.
*/
@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);
}
示例2: resolvePromise
import io.netty.util.concurrent.Promise; //導入方法依賴的package包/類
/**
* 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>
* <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 Use {@link CompletableFuture} instead.
*/
@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);
}
}