Examples with FileStore org.h2.mvstore.FileStore used on opensource projects

Example 31 with FileStore

use of org.h2.mvstore.FileStore in project h2database by h2database.

the class CreateScriptFile method openScriptWriter.

/**
 * Open a script writer.
 *
 * @param fileName the file name (the file will be overwritten)
 * @param compressionAlgorithm the compression algorithm (uppercase)
 * @param cipher the encryption algorithm or null
 * @param password the encryption password
 * @param charset the character set (for example UTF-8)
 * @return the print writer
 * @throws IOException on failure
 */
public static PrintWriter openScriptWriter(String fileName, String compressionAlgorithm, String cipher, String password, String charset) throws IOException {
    try {
        OutputStream out;
        if (cipher != null) {
            byte[] key = SHA256.getKeyPasswordHash("script", password.toCharArray());
            FileUtils.delete(fileName);
            FileStore store = FileStore.open(null, fileName, "rw", cipher, key);
            store.init();
            out = new FileStoreOutputStream(store, compressionAlgorithm);
            out = new BufferedOutputStream(out, Constants.IO_BUFFER_SIZE_COMPRESS);
        } else {
            out = FileUtils.newOutputStream(fileName, false);
            out = new BufferedOutputStream(out, Constants.IO_BUFFER_SIZE);
            out = CompressTool.wrapOutputStream(out, compressionAlgorithm, "script.sql");
        }
        return new PrintWriter(new OutputStreamWriter(out, charset));
    } catch (Exception e) {
        throw new IOException(e.getMessage(), e);
    }
}

Example 32 with FileStore

use of org.h2.mvstore.FileStore in project h2database by h2database.

the class Store method statisticsEnd.

/**
 * Stop collecting statistics.
 *
 * @return the statistics
 */
public Map<String, Integer> statisticsEnd() {
    HashMap<String, Integer> map = new HashMap<>();
    FileStore fs = mvStore.getFileStore();
    int reads = fs == null ? 0 : (int) (fs.getReadCount() - statisticsStart);
    map.put("reads", reads);
    return map;
}

Example 33 with FileStore

use of org.h2.mvstore.FileStore in project h2database by h2database.

the class Store method close.

/**
 * Close the store. Pending changes are persisted.
 * If time is allocated for housekeeping, chunks with a low
 * fill rate are compacted, and some chunks are put next to each other.
 * If time is unlimited then full compaction is performed, which uses
 * different algorithm - opens alternative temp store and writes all live
 * data there, then replaces this store with a new one.
 *
 * @param allowedCompactionTime time (in milliseconds) alloted for file
 *                              compaction activity, 0 means no compaction,
 *                              -1 means unlimited time (full compaction)
 */
public void close(int allowedCompactionTime) {
    try {
        FileStore fileStore = mvStore.getFileStore();
        if (!mvStore.isClosed() && fileStore != null) {
            boolean compactFully = allowedCompactionTime == -1;
            if (fileStore.isReadOnly()) {
                compactFully = false;
            } else {
                transactionStore.close();
            }
            if (compactFully) {
                allowedCompactionTime = 0;
            }
            mvStore.close(allowedCompactionTime);
            String fileName = fileStore.getFileName();
            if (compactFully && FileUtils.exists(fileName)) {
                // the file could have been deleted concurrently,
                // so only compact if the file still exists
                MVStoreTool.compact(fileName, true);
            }
        }
    } catch (MVStoreException e) {
        int errorCode = e.getErrorCode();
        if (errorCode == DataUtils.ERROR_WRITING_FAILED) {
        // disk full - ok
        } else if (errorCode == DataUtils.ERROR_FILE_CORRUPT) {
        // wrong encryption key - ok
        }
        mvStore.closeImmediately();
        throw DbException.get(ErrorCode.IO_EXCEPTION_1, e, "Closing");
    }
}

Example 34 with FileStore

use of org.h2.mvstore.FileStore in project h2database by h2database.

the class InformationSchemaTable method settings.

private void settings(SessionLocal session, ArrayList<Row> rows) {
    for (Setting s : database.getAllSettings()) {
        String value = s.getStringValue();
        if (value == null) {
            value = Integer.toString(s.getIntValue());
        }
        add(session, rows, identifier(s.getName()), value);
    }
    add(session, rows, "info.BUILD_ID", "" + Constants.BUILD_ID);
    add(session, rows, "info.VERSION_MAJOR", "" + Constants.VERSION_MAJOR);
    add(session, rows, "info.VERSION_MINOR", "" + Constants.VERSION_MINOR);
    add(session, rows, "info.VERSION", Constants.FULL_VERSION);
    if (session.getUser().isAdmin()) {
        String[] settings = { "java.runtime.version", "java.vm.name", "java.vendor", "os.name", "os.arch", "os.version", "sun.os.patch.level", "file.separator", "path.separator", "line.separator", "user.country", "user.language", "user.variant", "file.encoding" };
        for (String s : settings) {
            add(session, rows, "property." + s, Utils.getProperty(s, ""));
        }
    }
    add(session, rows, "DEFAULT_NULL_ORDERING", database.getDefaultNullOrdering().name());
    add(session, rows, "EXCLUSIVE", database.getExclusiveSession() == null ? "FALSE" : "TRUE");
    add(session, rows, "MODE", database.getMode().getName());
    add(session, rows, "QUERY_TIMEOUT", Integer.toString(session.getQueryTimeout()));
    add(session, rows, "TIME ZONE", session.currentTimeZone().getId());
    add(session, rows, "TRUNCATE_LARGE_LENGTH", session.isTruncateLargeLength() ? "TRUE" : "FALSE");
    add(session, rows, "VARIABLE_BINARY", session.isVariableBinary() ? "TRUE" : "FALSE");
    add(session, rows, "OLD_INFORMATION_SCHEMA", session.isOldInformationSchema() ? "TRUE" : "FALSE");
    BitSet nonKeywords = session.getNonKeywords();
    if (nonKeywords != null) {
        add(session, rows, "NON_KEYWORDS", Parser.formatNonKeywords(nonKeywords));
    }
    add(session, rows, "RETENTION_TIME", Integer.toString(database.getRetentionTime()));
    // database settings
    for (Map.Entry<String, String> entry : database.getSettings().getSortedSettings()) {
        add(session, rows, entry.getKey(), entry.getValue());
    }
    Store store = database.getStore();
    MVStore mvStore = store.getMvStore();
    FileStore fs = mvStore.getFileStore();
    if (fs != null) {
        add(session, rows, "info.FILE_WRITE", Long.toString(fs.getWriteCount()));
        add(session, rows, "info.FILE_WRITE_BYTES", Long.toString(fs.getWriteBytes()));
        add(session, rows, "info.FILE_READ", Long.toString(fs.getReadCount()));
        add(session, rows, "info.FILE_READ_BYTES", Long.toString(fs.getReadBytes()));
        add(session, rows, "info.UPDATE_FAILURE_PERCENT", String.format(Locale.ENGLISH, "%.2f%%", 100 * mvStore.getUpdateFailureRatio()));
        add(session, rows, "info.FILL_RATE", Integer.toString(mvStore.getFillRate()));
        add(session, rows, "info.CHUNKS_FILL_RATE", Integer.toString(mvStore.getChunksFillRate()));
        add(session, rows, "info.CHUNKS_FILL_RATE_RW", Integer.toString(mvStore.getRewritableChunksFillRate()));
        try {
            add(session, rows, "info.FILE_SIZE", Long.toString(fs.getFile().size()));
        } catch (IOException ignore) {
        /**/
        }
        add(session, rows, "info.CHUNK_COUNT", Long.toString(mvStore.getChunkCount()));
        add(session, rows, "info.PAGE_COUNT", Long.toString(mvStore.getPageCount()));
        add(session, rows, "info.PAGE_COUNT_LIVE", Long.toString(mvStore.getLivePageCount()));
        add(session, rows, "info.PAGE_SIZE", Integer.toString(mvStore.getPageSplitSize()));
        add(session, rows, "info.CACHE_MAX_SIZE", Integer.toString(mvStore.getCacheSize()));
        add(session, rows, "info.CACHE_SIZE", Integer.toString(mvStore.getCacheSizeUsed()));
        add(session, rows, "info.CACHE_HIT_RATIO", Integer.toString(mvStore.getCacheHitRatio()));
        add(session, rows, "info.TOC_CACHE_HIT_RATIO", Integer.toString(mvStore.getTocCacheHitRatio()));
        add(session, rows, "info.LEAF_RATIO", Integer.toString(mvStore.getLeafRatio()));
    }
}

Example 35 with FileStore

use of org.h2.mvstore.FileStore in project h2database by h2database.

the class TestMVStore method testProvidedFileStoreNotOpenedAndClosed.

private void testProvidedFileStoreNotOpenedAndClosed() {
    final AtomicInteger openClose = new AtomicInteger();
    FileStore fileStore = new OffHeapStore() {

        @Override
        public void open(String fileName, boolean readOnly, char[] encryptionKey) {
            openClose.incrementAndGet();
            super.open(fileName, readOnly, encryptionKey);
        }

        @Override
        public void close() {
            openClose.incrementAndGet();
            super.close();
        }
    };
    MVStore store = new MVStore.Builder().fileStore(fileStore).open();
    store.close();
    assertEquals(0, openClose.get());
}