Package org.iq80.leveldb

Examples of org.iq80.leveldb.DBException

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        DBComparator comparator = options.comparator();
        UserComparator userComparator;
        if (comparator != null) {
            userComparator = new CustomUserComparator(comparator);
        }else{
            userComparator = new BytewiseComparator();
        }
        internalKeyComparator = new InternalKeyComparator(userComparator);
        memTable = new MemTable(internalKeyComparator);
        immutableMemTable = null;
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        //use custom comparator if set
        DBComparator comparator = options.comparator();
        UserComparator userComparator;
        if (comparator != null) {
            userComparator = new CustomUserComparator(comparator);
        }else{
            userComparator = new BytewiseComparator();
        }
        internalKeyComparator = new InternalKeyComparator(userComparator);
        memTable = new MemTable(internalKeyComparator);
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            fileChannel = new FileInputStream(tableFile).getChannel();
            try {
                if( Iq80DBFactory.USE_MMAP ) {
                    table = new MMapTable(tableFile.getAbsolutePath(), fileChannel, userComparator, verifyChecksums);
                } else {
                    table = new FileChannelTable(tableFile.getAbsolutePath(), fileChannel, userComparator, verifyChecksums);
                }
            }
            catch (IOException e) {
                Closeables.closeQuietly(fileChannel);
                throw e;
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            String tableFileName = Filename.tableFileName(fileNumber);
            File tableFile = new File(databaseDir, tableFileName);
            fileChannel = new FileInputStream(tableFile).getChannel();
            try {
                if( Iq80DBFactory.USE_MMAP ) {
                    table = new MMapTable(tableFile.getAbsolutePath(), fileChannel, userComparator, verifyChecksums);
                } else {
                    table = new FileChannelTable(tableFile.getAbsolutePath(), fileChannel, userComparator, verifyChecksums);
                }
            }
            catch (IOException e) {
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        cache = CacheBuilder.newBuilder()
                .maximumSize(tableCacheSize)
                .removalListener(new RemovalListener<Long, TableAndFile>() {
                    public void onRemoval(RemovalNotification<Long, TableAndFile> notification) {
                        Table table = notification.getValue().getTable();
                        finalizer.addCleanup(table, table.closer());
                    }
                })
                .build(new CacheLoader<Long, TableAndFile>() {
                    public TableAndFile load(Long fileNumber)
                            throws IOException {
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        return getTable(file.getNumber()).getApproximateOffsetOf(key);
    }

    private Table getTable(long number)
    {
        Table table;
        try {
            table = cache.get(number).getTable();
        }
        catch (ExecutionException e) {
            Throwable cause = e;
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        try {
            InternalKey smallest = null;
            InternalKey largest = null;
            FileChannel channel = new FileOutputStream(file).getChannel();
            try {
                TableBuilder tableBuilder = new TableBuilder(options, channel, new InternalUserComparator(internalKeyComparator));

               
                for (Entry<InternalKey, Slice> entry : data) {
                    // update keys
                    InternalKey key = entry.getKey();
                    if (smallest == null) {
                        smallest = key;
                    }
                    largest = key;

                    tableBuilder.add(key.encode(), entry.getValue());
                }

                tableBuilder.finish();
            } finally {
                try {
                    channel.force(true);
                } finally {
                    channel.close();
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            compactionState.currentSmallest = null;
            compactionState.currentLargest = null;

            File file = new File(databaseDir, Filename.tableFileName(fileNumber));
            compactionState.outfile = new FileOutputStream(file).getChannel();
            compactionState.builder = new TableBuilder(options, compactionState.outfile, new InternalUserComparator(internalKeyComparator));
        }
        finally {
            mutex.unlock();
        }
    }
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    public boolean someFileOverlapsRange(Slice smallestUserKey, Slice largestUserKey)
    {
        InternalKey smallestInternalKey = new InternalKey(smallestUserKey, MAX_SEQUENCE_NUMBER, VALUE);
        int index = findFile(smallestInternalKey);

        UserComparator userComparator = internalKeyComparator.getUserComparator();
        return ((index < files.size()) &&
                userComparator.compare(largestUserKey, files.get(index).getSmallest().getUserKey()) >= 0);
    }
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    public boolean someFileOverlapsRange(Slice smallestUserKey, Slice largestUserKey)
    {
        InternalKey smallestInternalKey = new InternalKey(smallestUserKey, MAX_SEQUENCE_NUMBER, VALUE);
        int index = findFile(smallestInternalKey);

        UserComparator userComparator = internalKeyComparator.getUserComparator();
        return ((index < files.size()) &&
                userComparator.compare(largestUserKey, files.get(index).getSmallest().getUserKey()) >= 0);
    }
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