Examples with PageReference org.sirix.page.PageReference used on opensource projects

Example 6 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageReadTrxImpl method loadRevRoot.

/**
 * Get revision root page belonging to revision key.
 *
 * @param revisionKey key of revision to find revision root page for
 * @return revision root page of this revision key
 *
 * @throws SirixIOException if something odd happens within the creation process
 */
@Override
public RevisionRootPage loadRevRoot(@Nonnegative final int revisionKey) throws SirixIOException {
    checkArgument(revisionKey >= 0 && revisionKey <= mResourceManager.getMostRecentRevisionNumber(), "%s must be >= 0 and <= last stored revision (%s)!", revisionKey, mResourceManager.getMostRecentRevisionNumber());
    // The indirect page reference either fails horribly or returns a non null instance.
    final PageReference reference = getPageReferenceForPage(mUberPage.getIndirectPageReference(), revisionKey, -1, PageKind.UBERPAGE);
    try {
        RevisionRootPage page = null;
        if (mTrxIntentLog != null) {
            // Try to get it from the transaction log if it's present.
            final PageContainer cont = mTrxIntentLog.get(reference);
            page = cont == null ? null : (RevisionRootPage) cont.getComplete();
        }
        if (page == null) {
            assert reference.getKey() != Constants.NULL_ID_LONG || reference.getLogKey() != Constants.NULL_ID_INT || reference.getPersistentLogKey() != Constants.NULL_ID_LONG;
            page = (RevisionRootPage) mPageCache.get(reference);
        }
        return page;
    } catch (final ExecutionException | UncheckedExecutionException e) {
        throw new SirixIOException(e.getCause());
    }
}

Example 7 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageWriteTrxImpl method prepareRecordPage.

/**
 * Prepare record page.
 *
 * @param recordPageKey the key of the record page
 * @param pageKind the kind of page (used to determine the right subtree)
 * @return {@link PageContainer} instance
 * @throws SirixIOException if an I/O error occurs
 */
private PageContainer prepareRecordPage(@Nonnegative final long recordPageKey, final int index, final PageKind pageKind) throws SirixIOException {
    assert recordPageKey >= 0;
    assert pageKind != null;
    // Get the reference to the unordered key/value page storing the records.
    final PageReference reference = prepareLeafOfTree(mPageRtx.getPageReference(mNewRoot, pageKind, index), recordPageKey, index, pageKind);
    PageContainer pageContainer = mLog.get(reference);
    if (pageContainer.equals(PageContainer.emptyInstance())) {
        if (reference.getKey() == Constants.NULL_ID_LONG) {
            final UnorderedKeyValuePage completePage = new UnorderedKeyValuePage(recordPageKey, pageKind, Constants.NULL_ID_LONG, mPageRtx);
            final UnorderedKeyValuePage modifyPage = mPageRtx.clone(completePage);
            pageContainer = new PageContainer(completePage, modifyPage);
        } else {
            pageContainer = dereferenceRecordPageForModification(reference);
        }
        assert pageContainer != null;
        switch(pageKind) {
            case RECORDPAGE:
            case PATHSUMMARYPAGE:
            case PATHPAGE:
            case CASPAGE:
            case NAMEPAGE:
                appendLogRecord(reference, pageContainer);
                break;
            default:
                throw new IllegalStateException("Page kind not known!");
        }
    }
    return pageContainer;
}

Example 8 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageWriteTrxImpl method commit.

@Override
public UberPage commit() {
    mPageRtx.assertNotClosed();
    mPageRtx.mResourceManager.getCommitLock().lock();
    final Path commitFile = mPageRtx.mResourceManager.commitFile();
    commitFile.toFile().deleteOnExit();
    // Issues with windows that it's not created in the first time?
    while (!Files.exists(commitFile)) {
        try {
            Files.createFile(commitFile);
        } catch (final IOException e) {
            throw new SirixIOException(e);
        }
    }
    // Forcefully flush write-ahead transaction logs to persistent storage.
    if (mPageRtx.mResourceManager.getResourceManagerConfig().dumpLogs()) {
        mLog.toSecondCache();
    }
    final PageReference uberPageReference = new PageReference();
    final UberPage uberPage = getUberPage();
    uberPageReference.setPage(uberPage);
    final int revision = uberPage.getRevisionNumber();
    // Recursively write indirectly referenced pages.
    uberPage.commit(this);
    uberPageReference.setPage(uberPage);
    mPageWriter.writeUberPageReference(uberPageReference);
    uberPageReference.setPage(null);
    final Path indexes = mPageRtx.mResourceConfig.mPath.resolve(ResourceConfiguration.ResourcePaths.INDEXES.getFile() + String.valueOf(revision) + ".xml");
    if (!Files.exists(indexes)) {
        try {
            Files.createFile(indexes);
        } catch (final IOException e) {
            throw new SirixIOException(e);
        }
    }
    try (final OutputStream out = new FileOutputStream(indexes.toFile())) {
        mIndexController.serialize(out);
    } catch (final IOException e) {
        throw new SirixIOException("Index definitions couldn't be serialized!", e);
    }
    mLog.clear();
    mLog.close();
    mLog = createTrxIntentLog(mPageRtx.mResourceManager);
    try {
        Files.delete(commitFile);
    } catch (final IOException e) {
        throw new SirixIOException("Commit file couldn't be deleted!");
    }
    final UberPage commitedUberPage = (UberPage) mPageWriter.read(mPageWriter.readUberPageReference(), mPageRtx);
    mPageRtx.mResourceManager.getCommitLock().unlock();
    return commitedUberPage;
}

Example 9 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageDelegate method createNewReference.

private PageReference createNewReference(final BitSet offsetBitmap, int offset) {
    final int index = index(offsetBitmap, offset);
    final PageReference reference = new PageReference();
    mReferences.add(index, reference);
    // final PageReference[] newArray = new PageReference[mReferences.length + 1];
    // System.arraycopy(mReferences, 0, newArray, 0, index);
    // newArray[index] = new PageReference();
    // System.arraycopy(mReferences, index, newArray, index + 1, mReferences.length - index);
    mBitmap.set(offset, true);
    // mReferences = newArray;
    return reference;
}

Example 10 with PageReference

use of org.sirix.page.PageReference in project sirix by sirixdb.

the class PageDelegate method toString.

@Override
public String toString() {
    final MoreObjects.ToStringHelper helper = MoreObjects.toStringHelper(this);
    for (final PageReference ref : mReferences) {
        helper.add("reference", ref);
    }
    helper.add("bitmap", dumpBitmap(mBitmap));
    return helper.toString();
}