/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project . * * This Source Code Form is subject to the terms of the Mozilla Public * License , v . 2 . 0 . If a copy of the MPL was not distributed with this * file , You can obtain one at http : //mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice : * * Licensed to the Apache Software Foundation ( ASF ) under one or more * contributor license agreements . See the NOTICE file distributed * with this work for additional information regarding copyright * ownership . The ASF licenses this file to you under the Apache * License , Version 2 . 0 ( the " License " ) ; you may not use this file * except in compliance with the License . You may obtain a copy of * the License at http : //www.apache.org/licenses/LICENSE-2.0 . /** An optional companion interface to com : : sun : : star : : io : : XOutputStream that supports scenarios where com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) operates asynchronously and does not necessarily report any errors . < p > A typical scenario where this interface is useful is when an com : : sun : : star : : io : : XOutputStream is used to write to a file via NFS . Normally , any calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) will execute asynchronously then , in that any potential errors might only be reported by later calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) or com : : sun : : star : : io : : XOutputStream : : closeOutput ( ) . If such an output stream shall not be closed immediately after one or more calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) , but the client wants to know as soon as possible whether writing was successful , then com : : sun : : star : : io : : XAsyncOutputMonitor : : waitForCompletion ( ) should be called after the series of calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) . < / p > @ since OOo 2 . 0 /** waits for the completion of any previous calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) , and reports potentially pending errors . < p > Calling this method is potentially expensive ( even if the associated com : : sun : : star : : io : : XOutputStream represents a local file not accessed via NFS , for example ) . This method has a similar description to com : : sun : : star : : io : : XOutputStream : : flush ( ) . However , where the semantics of < code > flush < / code > are rather vague , < code > waitForCompletion < / code > has very specific semantics & mdash ; it just blocks long enough so that any errors encountered during previous calls to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) can reliably be reported . It specifically does not guarantee that any data have safely been stored on a stable physical medium , like a hard disk ( and it is completely unspecified whether < code > flush < / code > should give this guarantee ) . < / p > @ throws com : : sun : : star : : io : : IOException if any previous call to com : : sun : : star : : io : : XOutputStream : : writeBytes ( ) encountered such an error , but has not yet reported it ( in cases where < code > writeBytes < / code > operates asynchronously ) . void waitForCompletion() raises (IOException);/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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