Examples of com.persistit.exception.InUseException

com.persistit.exception.InUseException
Thrown when a Persistit database operation fails to establish a claim on a resource within a reasonable length of time. The timeout is a property of the {@link com.persistit.Exchange} that initiated the failed operation. @version 1.0

    }


    @Override
    void truncate() throws PersistitException {
        if (!claim(true, 0)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            final VolumeStatistics stat = _volume.getStatistics();
            final VolumeStructure struc = _volume.getStructure();

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    void readPage(final Buffer buffer) throws PersistitIOException, InvalidPageAddressException, VolumeClosedException,
            InUseException, PersistitInterruptedException {
        // non-exclusive claim here intended to conflict with exclusive claim in
        // close and truncate
        if (!claim(false, 0)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            final long page = buffer.getPageAddress();
            if (page < 1 || page >= _nextAvailablePage) {
                throw new InvalidPageAddressException("Page " + page + " out of bounds [0-" + _nextAvailablePage + "]");

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            ReadOnlyVolumeException, VolumeClosedException, InUseException, PersistitInterruptedException {
        // non-exclusive claim here intended to conflict with exclusive claim in
        // close and truncate
        final int pageSize = _volume.getStructure().getPageSize();
        if (!claim(false, 0)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            if (page < 0 || page >= _nextAvailablePage) {
                throw new InvalidPageAddressException("Page " + page + " out of bounds [0-" + _nextAvailablePage + "]");
            }

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            // Prevents read/write operations from starting while the
            // volume is being closed.
            //
            final VolumeStorage storage = getStorage();
            if (!storage.claim(true, timeout)) {
                throw new InUseException("Unable to acquire claim on " + this);
            }
            try {
                //
                // BufferPool#invalidate may fail and return false if other
                // threads hold claims on pages of this volume. In that case we
                // need to back off all locks and retry
                //
                if (getStructure().getPool().invalidate(this)) {
                    getStructure().close();
                    getStorage().close();
                    getStatistics().reset();
                    break;
                }
            } finally {
                storage.release();
            }
            if (System.currentTimeMillis() >= expiration) {
                throw new InUseException("Unable invalidate all pages on " + this);
            }
            Util.sleep(Persistit.SHORT_DELAY);
        }
    }

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            // Prevents read/write operations from starting while the
            // volume is being closed.
            //
            final VolumeStorage storage = getStorage();
            if (!storage.claim(true, timeout)) {
                throw new InUseException("Unable to acquire claim on " + this);
            }
            try {
                //
                // BufferPool#invalidate may fail and return false if other
                // threads hold claims on pages of this volume. In that case we
                // need to back off all locks and retry
                //
                if (getStructure().getPool().invalidate(this)) {
                    getStructure().close();
                    getStorage().close();
                    getStatistics().reset();
                    break;
                }
            } finally {
                storage.release();
            }
            if (System.currentTimeMillis() >= expiration) {
                throw new InUseException("Unable invalidate all pages on " + this);
            }
            Util.sleep(Persistit.SHORT_DELAY);
        }
    }

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                 * thread has an incompatible claim on it. Here we wait, then
                 * recheck to make sure the buffer still represents the same
                 * page.
                 */
                if (!buffer.claim(writer)) {
                    throw new InUseException("Thread " + Thread.currentThread().getName() + " failed to acquire "
                            + (writer ? "writer" : "reader") + " claim on " + buffer);
                }


                //
                // Test whether the buffer we picked out is still valid

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    void close() throws PersistitException {
        /*
         * Exclusive claim here intended to conflict with readPage and writePage
         */
        if (!claim(true)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            if (_closed) {
                return;
            }

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        return _nextAvailablePage;
    }


    void claimHeadBuffer() throws PersistitException {
        if (!_headBuffer.claim(true)) {
            throw new InUseException("Unable to acquire claim on " + _headBuffer);
        }
    }

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    void readPage(Buffer buffer) throws PersistitIOException, InvalidPageAddressException, VolumeClosedException,
            PersistitInterruptedException, InUseException {
        // non-exclusive claim here intended to conflict with exclusive claim in
        // close and truncate
        if (!claim(false)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            final long page = buffer.getPageAddress();
            if (page < 0 || page >= _nextAvailablePage) {
                throw new InvalidPageAddressException("Page " + page + " out of bounds [0-" + _nextAvailablePage + "]");

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        /*
         * Non-exclusive claim here intended to conflict with exclusive claim in
         * close and truncate
         */
        if (!claim(false)) {
            throw new InUseException("Unable to acquire claim on " + this);
        }
        try {
            _persistit.getJournalManager().writePageToJournal(buffer);
        } finally {
            release();

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Related Classes of com.persistit.exception.InUseException

com.persistit.BufferPool

com.persistit.Exchange

com.persistit.IntegrityCheck

com.persistit.Volume

com.persistit.VolumeStorageL2

com.persistit.VolumeStorageT2

com.persistit.VolumeStorageV2

com.persistit.VolumeStructure

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