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

Example 21 with FileStore

use of org.h2.mvstore.FileStore in project SpringStudy by myounghaklee.

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 22 with FileStore

use of org.h2.mvstore.FileStore in project SpringStudy by myounghaklee.

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 23 with FileStore

use of org.h2.mvstore.FileStore in project SpringStudy by myounghaklee.

the class ValueBlob method createTemporary.

/**
 * Create a BLOB in a temporary file.
 */
private static ValueBlob createTemporary(DataHandler handler, byte[] buff, int len, InputStream in, long remaining) throws IOException {
    String fileName = ValueLob.createTempLobFileName(handler);
    FileStore tempFile = handler.openFile(fileName, "rw", false);
    tempFile.autoDelete();
    long tmpPrecision = 0;
    try (FileStoreOutputStream out = new FileStoreOutputStream(tempFile, null)) {
        while (true) {
            tmpPrecision += len;
            out.write(buff, 0, len);
            remaining -= len;
            if (remaining <= 0) {
                break;
            }
            len = ValueLob.getBufferSize(handler, remaining);
            len = IOUtils.readFully(in, buff, len);
            if (len <= 0) {
                break;
            }
        }
    }
    return new ValueBlob(new LobDataFile(handler, fileName, tempFile), tmpPrecision);
}

Example 24 with FileStore

use of org.h2.mvstore.FileStore in project jackrabbit-oak by apache.

the class PersistentCache method createMapFactory.

private MapFactory createMapFactory(final int generation, final boolean readOnly) {
    MapFactory f = new MapFactory() {

        final String fileName = getFileName(generation);

        MVStore store;

        @Override
        void openStore() {
            if (store != null) {
                return;
            }
            MVStore.Builder builder = new MVStore.Builder();
            try {
                if (compress) {
                    builder.compress();
                }
                if (manualCommit) {
                    builder.autoCommitDisabled();
                }
                if (fileName != null) {
                    builder.fileName(fileName);
                }
                if (memCache >= 0) {
                    builder.cacheSize(memCache);
                }
                if (readOnly) {
                    builder.readOnly();
                }
                if (maxSizeMB < 10) {
                    builder.cacheSize(maxSizeMB);
                }
                if (autoCompact >= 0) {
                    builder.autoCompactFillRate(autoCompact);
                }
                builder.backgroundExceptionHandler(new Thread.UncaughtExceptionHandler() {

                    @Override
                    public void uncaughtException(Thread t, Throwable e) {
                        exceptionCount++;
                        LOG.debug("Error in the background thread of the persistent cache", e);
                        LOG.warn("Error in the background thread of the persistent cache: " + e);
                    }
                });
                store = builder.open();
                if (appendOnly) {
                    store.setReuseSpace(false);
                }
            } catch (Exception e) {
                exceptionCount++;
                LOG.warn("Could not open the store " + fileName, e);
            }
        }

        @Override
        synchronized void closeStore() {
            if (store == null) {
                return;
            }
            boolean compact = compactOnClose;
            try {
                if (store.getFileStore().isReadOnly()) {
                    compact = false;
                }
                // clear the interrupted flag, if set
                Thread.interrupted();
                store.close();
            } catch (Exception e) {
                exceptionCount++;
                LOG.debug("Could not close the store", e);
                LOG.warn("Could not close the store: " + e);
                store.closeImmediately();
            }
            if (compact) {
                try {
                    MVStoreTool.compact(fileName, true);
                } catch (Exception e) {
                    exceptionCount++;
                    LOG.debug("Could not compact the store", e);
                    LOG.warn("Could not compact the store: " + e);
                }
            }
            store = null;
        }

        @Override
        <K, V> Map<K, V> openMap(String name, Builder<K, V> builder) {
            try {
                if (builder == null) {
                    return store.openMap(name);
                }
                return store.openMap(name, builder);
            } catch (Exception e) {
                exceptionCount++;
                LOG.warn("Could not open the map", e);
                return null;
            }
        }

        @Override
        long getFileSize() {
            try {
                if (store == null) {
                    return 0;
                }
                FileStore fs = store.getFileStore();
                if (fs == null) {
                    return 0;
                }
                return fs.size();
            } catch (Exception e) {
                exceptionCount++;
                LOG.warn("Could not retrieve the map size", e);
                return 0;
            }
        }
    };
    f.openStore();
    return f;
}

Example 25 with FileStore

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

the class ChangeFileEncryption method process.

private void process(String fileName, boolean quiet) {
    if (fileName.endsWith(Constants.SUFFIX_MV_FILE)) {
        try {
            copy(fileName, quiet);
        } catch (IOException e) {
            throw DbException.convertIOException(e, "Error encrypting / decrypting file " + fileName);
        }
        return;
    }
    FileStore in;
    if (decrypt == null) {
        in = FileStore.open(null, fileName, "r");
    } else {
        in = FileStore.open(null, fileName, "r", cipherType, decrypt);
    }
    try {
        in.init();
        copy(fileName, in, encrypt, quiet);
    } finally {
        in.closeSilently();
    }
}