Examples with EMPTY_BUFFER io.netty.buffer.Unpooled.EMPTY_BUFFER used on opensource projects

Example 1 with EMPTY_BUFFER

use of io.netty.buffer.Unpooled.EMPTY_BUFFER in project pravega by pravega.

the class PravegaRequestProcessor method handleException.

private Void handleException(long requestId, String segment, long offset, String operation, Throwable u) {
    if (u == null) {
        IllegalStateException exception = new IllegalStateException("No exception to handle.");
        log.error(requestId, "Error (Segment = '{}', Operation = '{}')", segment, operation, exception);
        throw exception;
    }
    u = Exceptions.unwrap(u);
    String clientReplyStackTrace = replyWithStackTraceOnError ? Throwables.getStackTraceAsString(u) : EMPTY_STACK_TRACE;
    final Consumer<Throwable> failureHandler = t -> {
        log.error(requestId, "Error (Segment = '{}', Operation = '{}')", segment, "handling result of " + operation, t);
        connection.close();
    };
    if (u instanceof StreamSegmentExistsException) {
        log.info(requestId, "Segment '{}' already exists and cannot perform operation '{}'.", segment, operation);
        invokeSafely(connection::send, new SegmentAlreadyExists(requestId, segment, clientReplyStackTrace), failureHandler);
    } else if (u instanceof StreamSegmentNotExistsException) {
        log.warn(requestId, "Segment '{}' does not exist and cannot perform operation '{}'.", segment, operation);
        invokeSafely(connection::send, new NoSuchSegment(requestId, segment, clientReplyStackTrace, offset), failureHandler);
    } else if (u instanceof StreamSegmentSealedException) {
        log.info(requestId, "Segment '{}' is sealed and cannot perform operation '{}'.", segment, operation);
        invokeSafely(connection::send, new SegmentIsSealed(requestId, segment, clientReplyStackTrace, offset), failureHandler);
    } else if (u instanceof ContainerNotFoundException) {
        int containerId = ((ContainerNotFoundException) u).getContainerId();
        log.warn(requestId, "Wrong host. Segment = '{}' (Container {}) is not owned. Operation = '{}').", segment, containerId, operation);
        invokeSafely(connection::send, new WrongHost(requestId, segment, "", clientReplyStackTrace), failureHandler);
    } else if (u instanceof ReadCancellationException) {
        log.info(requestId, "Sending empty response on connection {} while reading segment {} due to CancellationException.", connection, segment);
        invokeSafely(connection::send, new SegmentRead(segment, offset, true, false, EMPTY_BUFFER, requestId), failureHandler);
    } else if (u instanceof CancellationException) {
        log.info(requestId, "Closing connection {} while performing {} due to {}.", connection, operation, u.toString());
        connection.close();
    } else if (u instanceof TokenExpiredException) {
        log.warn(requestId, "Expired token during operation {}", operation);
        invokeSafely(connection::send, new AuthTokenCheckFailed(requestId, clientReplyStackTrace, AuthTokenCheckFailed.ErrorCode.TOKEN_EXPIRED), failureHandler);
    } else if (u instanceof TokenException) {
        log.warn(requestId, "Token exception encountered during operation {}.", operation, u);
        invokeSafely(connection::send, new AuthTokenCheckFailed(requestId, clientReplyStackTrace, AuthTokenCheckFailed.ErrorCode.TOKEN_CHECK_FAILED), failureHandler);
    } else if (u instanceof UnsupportedOperationException) {
        log.warn(requestId, "Unsupported Operation '{}'.", operation, u);
        invokeSafely(connection::send, new OperationUnsupported(requestId, operation, clientReplyStackTrace), failureHandler);
    } else if (u instanceof BadOffsetException) {
        BadOffsetException badOffset = (BadOffsetException) u;
        log.info(requestId, "Segment '{}' is truncated and cannot perform operation '{}' at offset '{}'", segment, operation, offset);
        invokeSafely(connection::send, new SegmentIsTruncated(requestId, segment, badOffset.getExpectedOffset(), clientReplyStackTrace, offset), failureHandler);
    } else if (u instanceof TableSegmentNotEmptyException) {
        log.warn(requestId, "Table segment '{}' is not empty to perform '{}'.", segment, operation);
        invokeSafely(connection::send, new TableSegmentNotEmpty(requestId, segment, clientReplyStackTrace), failureHandler);
    } else if (u instanceof KeyNotExistsException) {
        log.warn(requestId, "Conditional update on Table segment '{}' failed as the key does not exist.", segment);
        invokeSafely(connection::send, new WireCommands.TableKeyDoesNotExist(requestId, segment, clientReplyStackTrace), failureHandler);
    } else if (u instanceof BadKeyVersionException) {
        log.warn(requestId, "Conditional update on Table segment '{}' failed due to bad key version.", segment);
        invokeSafely(connection::send, new WireCommands.TableKeyBadVersion(requestId, segment, clientReplyStackTrace), failureHandler);
    } else if (errorCodeExists(u)) {
        log.warn(requestId, "Operation on segment '{}' failed due to a {}.", segment, u.getClass());
        invokeSafely(connection::send, new WireCommands.ErrorMessage(requestId, segment, u.getMessage(), WireCommands.ErrorMessage.ErrorCode.valueOf(u.getClass())), failureHandler);
    } else {
        logError(requestId, segment, operation, u);
        // Closing connection should reinitialize things, and hopefully fix the problem
        connection.close();
        throw new IllegalStateException("Unknown exception.", u);
    }
    return null;
}