Examples of org.apache.derby.iapi.store.raw.Transaction

org.apache.derby.iapi.store.raw.Transaction

    {
        // need to open the container and update the row containing the 
        // serialized format of the heap.  
        ContainerHandle container = null;
        Page            page      = null;
        Transaction     rawtran   = xact_manager.getRawStoreXact();


        try
        {
            container = 
                rawtran.openContainer(
                    id, 
                    rawtran.newLockingPolicy(
                        LockingPolicy.MODE_CONTAINER,
                        TransactionController.ISOLATION_SERIALIZABLE, true),
                    ContainerHandle.MODE_FORUPDATE | 
                        (isTemporary() ? ContainerHandle.MODE_TEMP_IS_KEPT : 0));

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    String  db_name, 
    long    segmentid, 
    long    containerid, 
    long    pagenumber)
  {
    Transaction xact = null;
    try
    {
      Object module = getModuleFromDbName(db_name);


      RawStoreFactory store_module = (RawStoreFactory)
        Monitor.findServiceModule(module, RawStoreFactory.MODULE);


      xact = store_module.startInternalTransaction(ContextService.getFactory().getCurrentContextManager());


      ContainerKey id = new ContainerKey(segmentid, containerid);
      ContainerHandle container = 
        xact.openContainer(id,
                   ContainerHandle.MODE_READONLY);
      Page page = container.getPage(pagenumber);


      if (page != null)
      {
        System.out.println(page.toString());
        page.unlatch();
      }
      else
      {
        System.out.println("page " + pagenumber + " not found");
      }
      xact.abort();
      xact.close();
      xact = null;
    }
    catch (StandardException se)
    {
      se.printStackTrace();
    }
    finally
    {
      if (xact != null)
      {
        try
        {
          xact.abort();
          xact.close();
        }
        catch (StandardException se)
        {
        }
      }

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    {
      Enumeration e = mergeRuns.elements();


      try 
      {
        Transaction rawTran = tran.getRawStoreXact();
        long segmentId = StreamContainerHandle.TEMPORARY_SEGMENT;


        while (e.hasMoreElements())
        {
          long containerId = ((Long) e.nextElement()).longValue();
          rawTran.dropStreamContainer(segmentId, containerId);
        }
      }
      catch (StandardException se)
      {
        // Ignore problems with dropping, worst case

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            }


      // Create and open another temporary stream conglomerate
      // which will become
      // a merge run made up with the merged runs from the subset.
      Transaction rawTran = tran.getRawStoreXact();
      int segmentId = StreamContainerHandle.TEMPORARY_SEGMENT;
      long id = rawTran.addAndLoadStreamContainer(segmentId,
        properties, msRowSource);


      mergeRuns.addElement(new Long(id));


      // Drop the conglomerates in the merge subset
      e = subset.elements();
      while (e.hasMoreElements())
      {
        Long containerId = (Long) e.nextElement();
        rawTran.dropStreamContainer(segmentId, containerId.longValue());
      }
    }
  }

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    // TransactionManager. 
    SortBufferRowSource rowSource =
      new SortBufferRowSource(sortBuffer, (TransactionManager)null, sortObserver, true, sortBufferMax); 


    // Create a temporary stream conglomerate...
    Transaction rawTran = tran.getRawStoreXact();  // get raw transaction
    int segmentId = StreamContainerHandle.TEMPORARY_SEGMENT;
    long id = rawTran.addAndLoadStreamContainer(segmentId,
      properties, rowSource);


    // Don't close the sortBuffer, we just emptied it, the caller may reuse
    // that sortBuffer for the next run.
    rowSource = null;

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        {
            // No transaction context.  Create or find a raw store transaction,
            // make a context for it, and push the context.  Note this puts the
            // raw store transaction context above the access context, which is
            // required for error handling assumptions to be correct.
            Transaction rawtran = rawstore.findUserTransaction(cm, transName);
            RAMTransaction rt      = new RAMTransaction(this, rawtran, null);


            rtc = 
                new RAMTransactionContext(
                    cm, 
                    AccessFactoryGlobals.RAMXACT_CONTEXT_ID,
                    rt, false /* abortAll */);


      TransactionController tc = rtc.getTransaction();


      if (xactProperties != null)
            {
        rawtran.setup(tc);
        tc.commit();
      }


            rawtran.setDefaultLockingPolicy(system_default_locking_policy);


      tc.commit();


      return tc;
        }

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        {
            // No transaction context.  Create or find a raw store transaction,
            // make a context for it, and push the context.  Note this puts the
            // raw store transaction context above the access context, which is
            // required for error handling assumptions to be correct.
            Transaction rawtran = 
                rawstore.startGlobalTransaction(
                    cm, format_id, global_id, branch_id);


            xa_tc                    = new RAMTransaction(this, rawtran, null);


            rtc = 
                new RAMTransactionContext(
                    cm, 
                    AccessFactoryGlobals.RAMXACT_CONTEXT_ID,
                    xa_tc, false /* abortAll */);


            // RESOLVE - an XA transaction can only commit once so, if we
            // acquire readlocks.


      if (xactProperties != null) 
            {
        rawtran.setup(xa_tc);


                // HACK - special support has been added to the commitNoSync
                // of a global xact, to allow committing of read only xact, 
                // which will allow subsequent activity on the xact keeping
                // the same global transaction id.
                xa_tc.commitNoSync(
                    TransactionController.RELEASE_LOCKS |
                    TransactionController.READONLY_TRANSACTION_INITIALIZATION);
      }


            rawtran.setDefaultLockingPolicy(system_default_locking_policy);


            // HACK - special support has been added to the commitNoSync
            // of a global xact, to allow committing of read only xact, 
            // which will allow subsequent activity on the xact keeping
            // the same global transaction id.

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     throws StandardException
  {
    if (work == null)
      return Serviceable.DONE;


    Transaction tran = 
            rawStoreFactory.findUserTransaction(
                contextMgr, AccessFactoryGlobals.SYS_TRANS_NAME);


    if (SanityManager.DEBUG)
    {

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        // Create a transaction, make a context for it, and push the context.
        // Note this puts the raw store transaction context
        // above the access context, which is required for
        // error handling assumptions to be correct.
        
        Transaction rawtran = 
            accessmanager.getRawStore().startInternalTransaction(cm);
        RAMTransaction rt   = new RAMTransaction(accessmanager, rawtran, null);
        RAMTransactionContext rtc   = 
      new RAMTransactionContext(
                cm, AccessFactoryGlobals.RAMXACT_INTERNAL_CONTEXT_ID, 
                rt, true /*abortAll */);


        rawtran.setDefaultLockingPolicy(
                accessmanager.getDefaultLockingPolicy());


        return(rt);
    }

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        // Note that the nested transaction inherits the compatibility space
        // from "this", thus the new transaction shares the compatibility space
        // of the current transaction.
        


        Transaction child_rawtran = 
            ((readOnly) ?
                accessmanager.getRawStore().startNestedReadOnlyUserTransaction(
                    getLockSpace(), cm,
                    AccessFactoryGlobals.NESTED_READONLY_USER_TRANS) :
                accessmanager.getRawStore().startNestedUpdateUserTransaction(
                    cm, AccessFactoryGlobals.NESTED_UPDATE_USER_TRANS));


        RAMTransaction rt   = 
            new RAMTransaction(accessmanager, child_rawtran, this);


        RAMTransactionContext rtc   = 
      new RAMTransactionContext(
                cm, 
                AccessFactoryGlobals.RAMXACT_CHILD_CONTEXT_ID,
                rt, true /*abortAll */);


        child_rawtran.setDefaultLockingPolicy(
                accessmanager.getDefaultLockingPolicy());


        /*
        System.out.println("returning nested xact: " + rt + 
                "child_rawtran = " + child_rawtran);

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