Package org.h2.store

Examples of org.h2.store.PageStore

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        testReadOnly();
        testAdapter();
    }

    private static void testAdapter() {
        TraceSystem ts = new TraceSystem(null);
        ts.setLevelFile(TraceSystem.ADAPTER);
        ts.getTrace("test").info("test");
        ts.close();
    }
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        ts.getTrace("test").info("test");
        ts.close();
    }

    private void testTraceDebug() {
        TraceSystem ts = new TraceSystem(null);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ts.setSysOut(new PrintStream(out));
        ts.setLevelSystemOut(TraceSystem.DEBUG);
        ts.getTrace("test").debug(new Exception("error"), "test");
        ts.close();
        String outString = new String(out.toByteArray());
        assertContains(outString, "error");
        assertContains(outString, "Exception");
        assertContains(outString, "test");
    }
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        return tempFileDeleter;
    }

    public PageStore getPageStore() {
        if (pageStore == null) {
            pageStore = new PageStore(this, databaseName + Constants.SUFFIX_PAGE_FILE, accessModeData, cacheSize);
            if (pageSize != Constants.DEFAULT_PAGE_SIZE) {
                pageStore.setPageSize(pageSize);
            }
            if (!readOnly && fileLockMethod == FileLock.LOCK_FS) {
                pageStore.setLockFile(true);
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        Expression[] expressions = { expr };
        result = new LocalResult(session, expressions, 1);
        if (maxrows >= 0) {
            String plan;
            if (executeCommand) {
                PageStore store = db.isPersistent() ? db.getPageStore() : null;
                if (store != null) {
                    store.statisticsStart();
                }
                if (command.isQuery()) {
                    command.query(maxrows);
                } else {
                    command.update();
                }
                plan = command.getPlanSQL();
                Map<String, Integer> statistics = store == null ? null : store.statisticsEnd();
                if (statistics != null) {
                    int total = 0;
                    for (Entry<String, Integer> e : statistics.entrySet()) {
                        total += e.getValue();
                    }
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    public String toString() {
        return "page[" + getPos() + "] b-tree node table:" + index.getId() + " entries:" + entryCount;
    }

    public void moveTo(Session session, int newPos) {
        PageStore store = index.getPageStore();
        store.logUndo(this, data);
        PageBtreeNode p2 = PageBtreeNode.create(index, newPos, parentPageId);
        readAllRows();
        p2.rowCountStored = rowCountStored;
        p2.rowCount = rowCount;
        p2.childPageIds = childPageIds;
        p2.rows = rows;
        p2.entryCount = entryCount;
        p2.offsets = offsets;
        p2.onlyPosition = onlyPosition;
        p2.parentPageId = parentPageId;
        p2.start = start;
        store.update(p2);
        if (parentPageId == ROOT) {
            index.setRootPageId(session, newPos);
        } else {
            Page p = store.getPage(parentPageId);
            if (!(p instanceof PageBtreeNode)) {
                throw DbException.throwInternalError();
            }
            PageBtreeNode n = (PageBtreeNode) p;
            n.moveChild(getPos(), newPos);
        }
        for (int i = 0; i < entryCount + 1; i++) {
            int child = childPageIds[i];
            PageBtree p = index.getPage(child);
            p.setParentPageId(newPos);
            store.update(p);
        }
        store.free(getPos());
    }
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     * Get the page size of the database in bytes.
     *
     * @return the page size
     */
    public long getPageSize() {
        PageStore store = session.getDatabase().getPageStore();
        return store == null ? 0 : store.getPageSize();
    }
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            Collections.sort(settingNames);
            for (String k : settingNames) {
                add(rows, k, s.get(k));
            }
            if (database.isPersistent()) {
                PageStore store = database.getPageStore();
                add(rows, "info.FILE_WRITE_TOTAL", "" + store.getWriteCountTotal());
                add(rows, "info.FILE_WRITE", "" + store.getWriteCount());
                add(rows, "info.FILE_READ", "" + store.getReadCount());
                add(rows, "info.PAGE_COUNT", "" + store.getPageCount());
                add(rows, "info.CACHE_MAX_SIZE", "" + store.getCache().getMaxMemory());
                add(rows, "info.CACHE_SIZE", "" + store.getCache().getMemory());
            }
            break;
        }
        case TYPE_INFO: {
            for (DataType t : DataType.getTypes()) {
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        return tempFileDeleter;
    }

    public PageStore getPageStore() {
        if (pageStore == null) {
            pageStore = new PageStore(this, databaseName + Constants.SUFFIX_PAGE_FILE, accessModeData, cacheSize);
            if (pageSize != Constants.DEFAULT_PAGE_SIZE) {
                pageStore.setPageSize(pageSize);
            }
            if (!readOnly && fileLockMethod == FileLock.LOCK_FS) {
                pageStore.setLockFile(true);
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        Expression[] expressions = { expr };
        result = new LocalResult(session, expressions, 1);
        if (maxrows >= 0) {
            String plan;
            if (executeCommand) {
                PageStore store = db.isPersistent() ? db.getPageStore() : null;
                if (store != null) {
                    store.statisticsStart();
                }
                if (command.isQuery()) {
                    command.query(maxrows);
                } else {
                    command.update();
                }
                plan = command.getPlanSQL();
                Map<String, Integer> statistics = store == null ? null : store.statisticsEnd();
                if (statistics != null) {
                    int total = 0;
                    for (Entry<String, Integer> e : statistics.entrySet()) {
                        total += e.getValue();
                    }
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        return "page[" + getPos() + "] data node table:" + index.getId() +
            " entries:" + entryCount + " " + Arrays.toString(childPageIds);
    }

    public void moveTo(Session session, int newPos) {
        PageStore store = index.getPageStore();
        // load the pages into the cache, to ensure old pages
        // are written
        for (int i = 0; i < entryCount + 1; i++) {
            int child = childPageIds[i];
            store.getPage(child);
        }
        if (parentPageId != ROOT) {
            store.getPage(parentPageId);
        }
        store.logUndo(this, data);
        PageDataNode p2 = PageDataNode.create(index, newPos, parentPageId);
        p2.rowCountStored = rowCountStored;
        p2.rowCount = rowCount;
        p2.childPageIds = childPageIds;
        p2.keys = keys;
        p2.entryCount = entryCount;
        p2.length = length;
        store.update(p2);
        if (parentPageId == ROOT) {
            index.setRootPageId(session, newPos);
        } else {
            PageDataNode p = (PageDataNode) store.getPage(parentPageId);
            p.moveChild(getPos(), newPos);
        }
        for (int i = 0; i < entryCount + 1; i++) {
            int child = childPageIds[i];
            PageData p = (PageData) store.getPage(child);
            p.setParentPageId(newPos);
            store.update(p);
        }
        store.free(getPos());
    }
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