Package org.apache.derby.impl.store.access.btree

Examples of org.apache.derby.impl.store.access.btree.ControlRow


    ContainerKey        container_key)
    throws StandardException
    {
        Conglomerate    btree      = null;
        ContainerHandle container  = null;
        ControlRow      root       = null;

        try
        {
            // open readonly, with no locks.  Dirty read is ok as it is the
            // responsibility of client code to make sure this data is not
            // changing while being read.  The only changes that currently
            // happen to this data is creation and deletion - no updates
            // ever happen to btree conglomerates.
            container =
                (xact_manager.getRawStoreXact()).openContainer(
                    container_key,
                    (LockingPolicy) null,
                    ContainerHandle.MODE_READONLY);

            if (container == null)
            {
                // thrown a "known" error if the conglomerate does not exist
                // which is checked for explicitly by callers of the store
                // interface.

                throw StandardException.newException(
                    SQLState.STORE_CONGLOMERATE_DOES_NOT_EXIST,
                    new Long(container_key.getContainerId()));
            }

            // The conglomerate is located in the control row on the root page.
            root = ControlRow.get(container, BTree.ROOTPAGEID);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(root.getPage().isLatched());

            // read the Conglomerate from it's entry in the control row.
            btree = (B2I) root.getConglom(B2I.FORMAT_NUMBER);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(btree instanceof B2I);
        }
        finally
        {

            if (root != null)
                root.release();

            if (container != null)
                container.close();
        }
View Full Code Here


    Transaction         rawtran,
    LogicalUndoable     pageOp,
    LimitObjectInput    in)
        throws StandardException, IOException
    {
        ControlRow            root                      = null;
        ControlRow            control_row               = null;
        DataValueDescriptor[] logged_index_row_template = null;
        DataValueDescriptor[] template                  = null;
        Page                  ret_page                  = null;
        ContainerHandle       container                 = pageOp.getContainer();
        RecordHandle          rechandle                 = pageOp.getRecordHandle();
        boolean               ok_exit                   = false;
        int                   compare_result            = 1;
        B2I                   btree                     = null;

        // Open the btree to associate the open contain handle, thus the
        // current xact with all subsequent operations during undo.


        try
        {

            // Need Conglomerate to create templates - get from the root page.
            root = ControlRow.Get(container, BTree.ROOTPAGEID);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(root.getPage().isLatched());

            btree = (B2I) root.getConglom(B2I.FORMAT_NUMBER);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(btree instanceof B2I);

            // create a template for the logged index row from the conglomerate.
            logged_index_row_template = btree.createTemplate();

            // create a template for the page index row from the conglomerate.
            template                  = btree.createTemplate();
        }
        finally
        {
            if (root != null)
                root.release();
        }

        // Get logged row from record.
        pageOp.restoreLoggedRow(logged_index_row_template, in);

        // RESOLVE (mikem) - currently restoreLoggedRow() may latch and unlatch
        // a page in the container (see ST059).
        // Now get the page where the record used to be.

        ok_exit = false;
        try
        {
            // "open" the btree, using recovery's already opened container
            OpenBTree open_btree = new OpenBTree();

            open_btree.init(
                (TransactionManager) null,  // current user xact - not needed
                (TransactionManager) null,  // current xact      - not needed
                pageOp.getContainer(),      // recovery already opened container
                rawtran,
                false,
                ContainerHandle.MODE_FORUPDATE,
                                            // open_mode not used - container is
                                            // already opened.
                TransactionManager.MODE_NONE,
                (BTreeLockingPolicy) null,  // don't get locks during undo
                btree,                      
                (LogicalUndo) null,         // no logical undo necessary, as
                                            // this code only does read.
                (DynamicCompiledOpenConglomInfo) null);

            // System.out.println(
              //   "calling logical undo, recordhandle = " + rechandle);
            // System.out.println("calling logical undo, record= " +
              //    logged_index_row_template);

            // Get the page where the record was originally, before splits
            // could have possibly moved it.
            control_row = ControlRow.Get(open_btree, rechandle.getPageNumber());

            // init compare_result, if record doesn't exist do the search
            compare_result = 1;

            if (control_row.getPage().recordExists(rechandle, true))
            {

                if (SanityManager.DEBUG)
                {
                    SanityManager.ASSERT(
                        control_row.getPage().fetchNumFields(rechandle) ==
                        logged_index_row_template.length);
                }

                // create template for the page index row from the conglomerate.
                RecordHandle ret_rechandle =
                    control_row.getPage().fetchFromSlot(
                        (RecordHandle) null,
                        control_row.getPage().getSlotNumber(rechandle),
                        template,
                        (FetchDescriptor) null,
                        true);

                // compare the 2 rows, and if they are the same then the raw
                // store has the right page and record and there is no work to
                // be done (this is usual case).
                compare_result = ControlRow.CompareIndexRowToKey(
                    template, logged_index_row_template,
                    logged_index_row_template.length, 1,
                    open_btree.getColumnSortOrderInfo());
            }

            if (compare_result == 0)
            {
                ret_page = control_row.getPage();
            }
            else
            {
                // if the 2 don't compare equal, search the btree from the root
                // for the logged row, find the leaf, reset the row for the raw
                // store, and return the new page latched.
               
                // Create the objects needed for the insert.
                SearchParameters sp = new SearchParameters(
                        logged_index_row_template, ScanController.GE,
                        template, open_btree, false);

                control_row.release();
                control_row = null;
                control_row =
                    ControlRow.Get(open_btree, BTree.ROOTPAGEID).search(sp);

                if (!sp.resultExact)
                {
                    if (SanityManager.DEBUG)
                    {
                        SanityManager.THROWASSERT(
                            "B2IUndo - could not find key being searched for:" +
                            ";key = " +
                                RowUtil.toString(logged_index_row_template) +
                            ";sp = " + sp +
                            "control_row = " + control_row +
                            "control_row.debugPage() = " +
                                control_row.debugPage(open_btree) +
                            "control_row.getPage() = " +
                                control_row.getPage());
                    }

                    throw StandardException.newException(
                            SQLState.BTREE_ROW_NOT_FOUND_DURING_UNDO);
                }
                else
                {
                    RecordHandle rh =
                        control_row.getPage().fetchFromSlot(
                            (RecordHandle) null,
                            sp.resultSlot, new DataValueDescriptor[0],
                            (FetchDescriptor) null,
                            true);

                    pageOp.resetRecordHandle(rh);

                    ret_page = control_row.getPage();
                }
            }
            ok_exit = true;
        }
        finally
        {
            //System.out.println("B2iUndo returning with rec handle: " + 
             //                   pageOp.getRecordHandle());
            if ((!ok_exit) && (control_row != null))
                control_row.release();
        }

        return(ret_page);
    }
View Full Code Here

    Transaction         rawtran,
    LogicalUndoable     pageOp,
    LimitObjectInput    in)
        throws StandardException, IOException
    {
        ControlRow            root                      = null;
        ControlRow            control_row               = null;
        DataValueDescriptor[] logged_index_row_template = null;
        DataValueDescriptor[] template                  = null;
        Page                  ret_page                  = null;
        ContainerHandle       container                 = pageOp.getContainer();
        RecordHandle          rechandle                 = pageOp.getRecordHandle();
        boolean               ok_exit                   = false;
        int                   compare_result            = 1;
        B2I                   btree                     = null;

        // Open the btree to associate the open contain handle, thus the
        // current xact with all subsequent operations during undo.


        try
        {

            // Need Conglomerate to create templates - get from the root page.
            root = ControlRow.get(container, BTree.ROOTPAGEID);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(root.getPage().isLatched());

            btree = (B2I) root.getConglom(B2I.FORMAT_NUMBER);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(btree instanceof B2I);

            // create a template for the logged index row from the conglomerate.
            logged_index_row_template = btree.createTemplate(rawtran);

            // create a template for the page index row from the conglomerate.
            template                  = btree.createTemplate(rawtran);
        }
        finally
        {
            if (root != null)
                root.release();
        }

        // Get logged row from record.
        pageOp.restoreLoggedRow(logged_index_row_template, in);

        // RESOLVE (mikem) - currently restoreLoggedRow() may latch and unlatch
        // a page in the container (see ST059).
        // Now get the page where the record used to be.

        ok_exit = false;
        try
        {
            // "open" the btree, using recovery's already opened container
            OpenBTree open_btree = new OpenBTree();

            open_btree.init(
                (TransactionManager) null,  // current user xact - not needed
                (TransactionManager) null,  // current xact      - not needed
                pageOp.getContainer(),      // recovery already opened container
                rawtran,
                false,
                ContainerHandle.MODE_FORUPDATE,
                                            // open_mode not used - container is
                                            // already opened.
                TransactionManager.MODE_NONE,
                (BTreeLockingPolicy) null,  // don't get locks during undo
                btree,                      
                (LogicalUndo) null,         // no logical undo necessary, as
                                            // this code only does read.
                (DynamicCompiledOpenConglomInfo) null);

            // System.out.println(
              //   "calling logical undo, recordhandle = " + rechandle);
            // System.out.println("calling logical undo, record= " +
              //    logged_index_row_template);

            // Get the page where the record was originally, before splits
            // could have possibly moved it.
            control_row = ControlRow.get(open_btree, rechandle.getPageNumber());

            // init compare_result, if record doesn't exist do the search
            compare_result = 1;

            if (control_row.getPage().recordExists(rechandle, true))
            {

                if (SanityManager.DEBUG)
                {
                    SanityManager.ASSERT(
                        control_row.getPage().fetchNumFields(rechandle) ==
                        logged_index_row_template.length);
                }

                // create template for the page index row from the conglomerate.
                RecordHandle ret_rechandle =
                    control_row.getPage().fetchFromSlot(
                        (RecordHandle) null,
                        control_row.getPage().getSlotNumber(rechandle),
                        template,
                        (FetchDescriptor) null,
                        true);

                // compare the 2 rows, and if they are the same then the raw
                // store has the right page and record and there is no work to
                // be done (this is usual case).
                compare_result = ControlRow.compareIndexRowToKey(
                    template, logged_index_row_template,
                    logged_index_row_template.length, 1,
                    open_btree.getColumnSortOrderInfo());
            }

            if (compare_result == 0)
            {
                ret_page = control_row.getPage();
            }
            else
            {
                // if the 2 don't compare equal, search the btree from the root
                // for the logged row, find the leaf, reset the row for the raw
                // store, and return the new page latched.
               
                // Create the objects needed for the insert.
                SearchParameters sp = new SearchParameters(
                        logged_index_row_template, ScanController.GE,
                        template, open_btree, false);

                control_row.release();
                control_row = null;
                control_row =
                    ControlRow.get(open_btree, BTree.ROOTPAGEID).search(sp);

                if (!sp.resultExact)
                {
                    if (SanityManager.DEBUG)
                    {
                        SanityManager.THROWASSERT(
                            "B2IUndo - could not find key being searched for:" +
                            ";key = " +
                                RowUtil.toString(logged_index_row_template) +
                            ";sp = " + sp +
                            "control_row = " + control_row +
                            "control_row.debugPage() = " +
                                control_row.debugPage(open_btree) +
                            "control_row.getPage() = " +
                                control_row.getPage());
                    }

                    throw StandardException.newException(
                            SQLState.BTREE_ROW_NOT_FOUND_DURING_UNDO);
                }
                else
                {
                    RecordHandle rh =
                        control_row.getPage().fetchFromSlot(
                            (RecordHandle) null,
                            sp.resultSlot, new DataValueDescriptor[0],
                            (FetchDescriptor) null,
                            true);

                    pageOp.resetRecordHandle(rh);

                    ret_page = control_row.getPage();
                }
            }
            ok_exit = true;
        }
        finally
        {
            //System.out.println("B2iUndo returning with rec handle: " + 
             //                   pageOp.getRecordHandle());
            if ((!ok_exit) && (control_row != null))
                control_row.release();
        }

        return(ret_page);
    }
View Full Code Here

    ContainerKey        container_key)
    throws StandardException
    {
        Conglomerate    btree      = null;
        ContainerHandle container  = null;
        ControlRow      root       = null;

        try
        {
            // open readonly, with no locks.  Dirty read is ok as it is the
            // responsibility of client code to make sure this data is not
            // changing while being read.  The only changes that currently
            // happen to this data is creation and deletion - no updates
            // ever happen to btree conglomerates.
            container =
                (xact_manager.getRawStoreXact()).openContainer(
                    container_key,
                    (LockingPolicy) null,
                    ContainerHandle.MODE_READONLY);

            if (container == null)
            {
                // thrown a "known" error if the conglomerate does not exist
                // which is checked for explicitly by callers of the store
                // interface.

                throw StandardException.newException(
                    SQLState.STORE_CONGLOMERATE_DOES_NOT_EXIST,
                    new Long(container_key.getContainerId()));
            }

            // The conglomerate is located in the control row on the root page.
            root = ControlRow.get(container, BTree.ROOTPAGEID);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(root.getPage().isLatched());

            // read the Conglomerate from it's entry in the control row.
            btree = (Conglomerate) root.getConglom(B2I.FORMAT_NUMBER);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(btree instanceof B2I);
        }
        finally
        {

            if (root != null)
                root.release();

            if (container != null)
                container.close();
        }
View Full Code Here

    ContainerKey        container_key)
    throws StandardException
    {
        Conglomerate    btree      = null;
        ContainerHandle container  = null;
        ControlRow      root       = null;

        try
        {
            // open readonly, with no locks.  Dirty read is ok as it is the
            // responsibility of client code to make sure this data is not
            // changing while being read.  The only changes that currently
            // happen to this data is creation and deletion - no updates
            // ever happen to btree conglomerates.
            container =
                (xact_manager.getRawStoreXact()).openContainer(
                    container_key,
                    (LockingPolicy) null,
                    ContainerHandle.MODE_READONLY);

            if (container == null)
            {
                // thrown a "known" error if the conglomerate does not exist
                // which is checked for explicitly by callers of the store
                // interface.

                throw StandardException.newException(
                    SQLState.STORE_CONGLOMERATE_DOES_NOT_EXIST,
                    new Long(container_key.getContainerId()));
            }

            // The conglomerate is located in the control row on the root page.
            root = ControlRow.Get(container, BTree.ROOTPAGEID);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(root.getPage().isLatched());

            // read the Conglomerate from it's entry in the control row.
            btree = (B2I) root.getConglom(B2I.FORMAT_NUMBER);

            if (SanityManager.DEBUG)
                SanityManager.ASSERT(btree instanceof B2I);
        }
        finally
        {

            if (root != null)
                root.release();

            if (container != null)
                container.close();
        }
View Full Code Here

TOP

Related Classes of org.apache.derby.impl.store.access.btree.ControlRow

Copyright © 2018 www.massapicom. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.