Examples with Page org.h2.store.Page used on opensource projects

Example 31 with Page

use of org.h2.store.Page in project h2database by h2database.

the class MVTableEngine method init.

/**
 * Initialize the MVStore.
 *
 * @param db the database
 * @return the store
 */
public static Store init(final Database db) {
    Store store = db.getMvStore();
    if (store != null) {
        return store;
    }
    byte[] key = db.getFileEncryptionKey();
    String dbPath = db.getDatabasePath();
    MVStore.Builder builder = new MVStore.Builder();
    store = new Store();
    boolean encrypted = false;
    if (dbPath != null) {
        String fileName = dbPath + Constants.SUFFIX_MV_FILE;
        MVStoreTool.compactCleanUp(fileName);
        builder.fileName(fileName);
        builder.pageSplitSize(db.getPageSize());
        if (db.isReadOnly()) {
            builder.readOnly();
        } else {
            // possibly create the directory
            boolean exists = FileUtils.exists(fileName);
            if (exists && !FileUtils.canWrite(fileName)) {
            // read only
            } else {
                String dir = FileUtils.getParent(fileName);
                FileUtils.createDirectories(dir);
            }
        }
        if (key != null) {
            encrypted = true;
            char[] password = new char[key.length / 2];
            for (int i = 0; i < password.length; i++) {
                password[i] = (char) (((key[i + i] & 255) << 16) | ((key[i + i + 1]) & 255));
            }
            builder.encryptionKey(password);
        }
        if (db.getSettings().compressData) {
            builder.compress();
            // use a larger page split size to improve the compression ratio
            builder.pageSplitSize(64 * 1024);
        }
        builder.backgroundExceptionHandler(new UncaughtExceptionHandler() {

            @Override
            public void uncaughtException(Thread t, Throwable e) {
                db.setBackgroundException(DbException.convert(e));
            }
        });
    }
    store.open(db, builder, encrypted);
    db.setMvStore(store);
    return store;
}

Example 32 with Page

use of org.h2.store.Page in project h2database by h2database.

the class PageDataOverflow method create.

/**
 * Create a new overflow page.
 *
 * @param store the page store
 * @param page the page id
 * @param type the page type
 * @param parentPageId the parent page id
 * @param next the next page or 0
 * @param all the data
 * @param offset the offset within the data
 * @param size the number of bytes
 * @return the page
 */
static PageDataOverflow create(PageStore store, int page, int type, int parentPageId, int next, Data all, int offset, int size) {
    Data data = store.createData();
    PageDataOverflow p = new PageDataOverflow(store, page, data);
    store.logUndo(p, null);
    data.writeByte((byte) type);
    data.writeShortInt(0);
    data.writeInt(parentPageId);
    if (type == Page.TYPE_DATA_OVERFLOW) {
        data.writeInt(next);
    } else {
        data.writeShortInt(size);
    }
    p.start = data.length();
    data.write(all.getBytes(), offset, size);
    p.type = type;
    p.parentPageId = parentPageId;
    p.nextPage = next;
    p.size = size;
    return p;
}

Example 33 with Page

use of org.h2.store.Page in project ignite by apache.

the class InlineIndexHelperTest method testPutGet.

/**
 */
private void testPutGet(Value v1, Value v2, Value v3) throws Exception {
    DataRegionConfiguration plcCfg = new DataRegionConfiguration().setInitialSize(1024 * MB).setMaxSize(1024 * MB);
    PageMemory pageMem = new PageMemoryNoStoreImpl(log(), new UnsafeMemoryProvider(log()), null, PAGE_SIZE, plcCfg, new DataRegionMetricsImpl(plcCfg), false);
    pageMem.start();
    long pageId = 0L;
    long page = 0L;
    try {
        pageId = pageMem.allocatePage(CACHE_ID, 1, PageIdAllocator.FLAG_DATA);
        page = pageMem.acquirePage(CACHE_ID, pageId);
        long pageAddr = pageMem.readLock(CACHE_ID, pageId, page);
        int off = 0;
        int max = 255;
        InlineIndexHelper ih = new InlineIndexHelper(v1.getType(), 1, 0, CompareMode.getInstance(null, 0));
        off += ih.put(pageAddr, off, v1, max - off);
        off += ih.put(pageAddr, off, v2, max - off);
        off += ih.put(pageAddr, off, v3, max - off);
        Value v11 = ih.get(pageAddr, 0, max);
        Value v22 = ih.get(pageAddr, ih.fullSize(pageAddr, 0), max);
        assertEquals(v1.getObject(), v11.getObject());
        assertEquals(v2.getObject(), v22.getObject());
    } finally {
        if (page != 0L)
            pageMem.releasePage(CACHE_ID, pageId, page);
        pageMem.stop();
    }
}

Example 34 with Page

use of org.h2.store.Page in project ignite by apache.

the class InlineIndexHelperTest method putAndCompare.

/**
 * @param v1 Value 1.
 * @param v2 Value 2.
 * @param maxSize Max inline size.
 * @return Compare result.
 * @throws Exception If failed.
 */
private int putAndCompare(String v1, String v2, int maxSize) throws Exception {
    DataRegionConfiguration plcCfg = new DataRegionConfiguration().setInitialSize(1024 * MB).setMaxSize(1024 * MB);
    PageMemory pageMem = new PageMemoryNoStoreImpl(log, new UnsafeMemoryProvider(log), null, PAGE_SIZE, plcCfg, new DataRegionMetricsImpl(plcCfg), false);
    pageMem.start();
    long pageId = 0L;
    long page = 0L;
    try {
        pageId = pageMem.allocatePage(CACHE_ID, 1, PageIdAllocator.FLAG_DATA);
        page = pageMem.acquirePage(CACHE_ID, pageId);
        long pageAddr = pageMem.readLock(CACHE_ID, pageId, page);
        int off = 0;
        InlineIndexHelper ih = new InlineIndexHelper(Value.STRING, 1, 0, CompareMode.getInstance(null, 0));
        ih.put(pageAddr, off, v1 == null ? ValueNull.INSTANCE : ValueString.get(v1), maxSize);
        Comparator<Value> comp = new Comparator<Value>() {

            @Override
            public int compare(Value o1, Value o2) {
                throw new AssertionError("Optimized algorithm should be used.");
            }
        };
        return ih.compare(pageAddr, off, maxSize, v2 == null ? ValueNull.INSTANCE : ValueString.get(v2), comp);
    } finally {
        if (page != 0L)
            pageMem.releasePage(CACHE_ID, pageId, page);
        pageMem.stop();
    }
}

Example 35 with Page

use of org.h2.store.Page in project ignite by apache.

the class InlineIndexHelper method compareAsDateTime.

/**
 * @param pageAddr Page address.
 * @param off Offset.
 * @param v Value to compare.
 * @param type Highest value type.
 * @return Compare result ({@code -2} means we can't compare).
 */
private int compareAsDateTime(long pageAddr, int off, Value v, int type) {
    // only compatible types are supported now.
    if (PageUtils.getByte(pageAddr, off) == type) {
        switch(type) {
            case Value.TIME:
                long nanos1 = PageUtils.getLong(pageAddr, off + 1);
                long nanos2 = ((ValueTime) v.convertTo(type)).getNanos();
                return fixSort(Long.signum(nanos1 - nanos2), sortType());
            case Value.DATE:
                long date1 = PageUtils.getLong(pageAddr, off + 1);
                long date2 = ((ValueDate) v.convertTo(type)).getDateValue();
                return fixSort(Long.signum(date1 - date2), sortType());
            case Value.TIMESTAMP:
                ValueTimestamp v0 = (ValueTimestamp) v.convertTo(type);
                date1 = PageUtils.getLong(pageAddr, off + 1);
                date2 = v0.getDateValue();
                int c = Long.signum(date1 - date2);
                if (c == 0) {
                    nanos1 = PageUtils.getLong(pageAddr, off + 9);
                    nanos2 = v0.getTimeNanos();
                    c = Long.signum(nanos1 - nanos2);
                }
                return fixSort(c, sortType());
        }
    }
    return Integer.MIN_VALUE;
}