Examples with ManagedConnection org.datanucleus.store.connection.ManagedConnection used on opensource projects

Example 1 with ManagedConnection

use of org.datanucleus.store.connection.ManagedConnection in project datanucleus-rdbms by datanucleus.

the class OracleClobRDBMSMapping method updateClobColumn.

/**
 * Convenience method to update the contents of a CLOB column.
 * Oracle requires that a CLOB is initialised with EMPTY_CLOB() and then you retrieve
 * the column and update its CLOB value. Performs a statement
 * <pre>
 * SELECT {clobColumn} FROM TABLE WHERE ID=? FOR UPDATE
 * </pre>
 * and then updates the Clob value returned.
 * @param op ObjectProvider of the object
 * @param table Table storing the CLOB column
 * @param mapping Datastore mapping for the CLOB column
 * @param value The value to store in the CLOB
 * @throws NucleusObjectNotFoundException Thrown if an object is not found
 * @throws NucleusDataStoreException Thrown if an error occurs in datastore communication
 */
@SuppressWarnings("deprecation")
public static void updateClobColumn(ObjectProvider op, Table table, DatastoreMapping mapping, String value) {
    ExecutionContext ec = op.getExecutionContext();
    RDBMSStoreManager storeMgr = table.getStoreManager();
    // Don't support join tables yet
    DatastoreClass classTable = (DatastoreClass) table;
    SQLExpressionFactory exprFactory = storeMgr.getSQLExpressionFactory();
    // Generate "SELECT {clobColumn} FROM TABLE WHERE ID=? FOR UPDATE" statement
    SelectStatement sqlStmt = new SelectStatement(storeMgr, table, null, null);
    sqlStmt.setClassLoaderResolver(ec.getClassLoaderResolver());
    sqlStmt.addExtension(SQLStatement.EXTENSION_LOCK_FOR_UPDATE, true);
    SQLTable blobSqlTbl = SQLStatementHelper.getSQLTableForMappingOfTable(sqlStmt, sqlStmt.getPrimaryTable(), mapping.getJavaTypeMapping());
    sqlStmt.select(blobSqlTbl, mapping.getColumn(), null);
    StatementClassMapping mappingDefinition = new StatementClassMapping();
    AbstractClassMetaData cmd = op.getClassMetaData();
    int inputParamNum = 1;
    if (cmd.getIdentityType() == IdentityType.DATASTORE) {
        // Datastore identity value for input
        JavaTypeMapping datastoreIdMapping = classTable.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false);
        SQLExpression expr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), datastoreIdMapping);
        SQLExpression val = exprFactory.newLiteralParameter(sqlStmt, datastoreIdMapping, null, "ID");
        sqlStmt.whereAnd(expr.eq(val), true);
        StatementMappingIndex datastoreIdx = mappingDefinition.getMappingForMemberPosition(SurrogateColumnType.DATASTORE_ID.getFieldNumber());
        if (datastoreIdx == null) {
            datastoreIdx = new StatementMappingIndex(datastoreIdMapping);
            mappingDefinition.addMappingForMember(SurrogateColumnType.DATASTORE_ID.getFieldNumber(), datastoreIdx);
        }
        datastoreIdx.addParameterOccurrence(new int[] { inputParamNum });
    } else if (cmd.getIdentityType() == IdentityType.APPLICATION) {
        // Application identity value(s) for input
        int[] pkNums = cmd.getPKMemberPositions();
        for (int i = 0; i < pkNums.length; i++) {
            AbstractMemberMetaData mmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(pkNums[i]);
            JavaTypeMapping pkMapping = classTable.getMemberMapping(mmd);
            SQLExpression expr = exprFactory.newExpression(sqlStmt, sqlStmt.getPrimaryTable(), pkMapping);
            SQLExpression val = exprFactory.newLiteralParameter(sqlStmt, pkMapping, null, "PK" + i);
            sqlStmt.whereAnd(expr.eq(val), true);
            StatementMappingIndex pkIdx = mappingDefinition.getMappingForMemberPosition(pkNums[i]);
            if (pkIdx == null) {
                pkIdx = new StatementMappingIndex(pkMapping);
                mappingDefinition.addMappingForMember(pkNums[i], pkIdx);
            }
            int[] inputParams = new int[pkMapping.getNumberOfDatastoreMappings()];
            for (int j = 0; j < pkMapping.getNumberOfDatastoreMappings(); j++) {
                inputParams[j] = inputParamNum++;
            }
            pkIdx.addParameterOccurrence(inputParams);
        }
    }
    String textStmt = sqlStmt.getSQLText().toSQL();
    if (op.isEmbedded()) {
        // This mapping is embedded, so navigate back to the real owner since that is the "id" in the table
        ObjectProvider[] embeddedOwners = ec.getOwnersForEmbeddedObjectProvider(op);
        if (embeddedOwners != null) {
            // Just use the first owner
            // TODO Should check if the owner is stored in this table
            op = embeddedOwners[0];
        }
    }
    try {
        ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
        SQLController sqlControl = storeMgr.getSQLController();
        try {
            PreparedStatement ps = sqlControl.getStatementForQuery(mconn, textStmt);
            try {
                // Provide the primary key field(s) to the JDBC statement
                if (cmd.getIdentityType() == IdentityType.DATASTORE) {
                    StatementMappingIndex datastoreIdx = mappingDefinition.getMappingForMemberPosition(SurrogateColumnType.DATASTORE_ID.getFieldNumber());
                    for (int i = 0; i < datastoreIdx.getNumberOfParameterOccurrences(); i++) {
                        classTable.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false).setObject(ec, ps, datastoreIdx.getParameterPositionsForOccurrence(i), op.getInternalObjectId());
                    }
                } else if (cmd.getIdentityType() == IdentityType.APPLICATION) {
                    op.provideFields(cmd.getPKMemberPositions(), new ParameterSetter(op, ps, mappingDefinition));
                }
                ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, textStmt, ps);
                try {
                    if (!rs.next()) {
                        throw new NucleusObjectNotFoundException("No such database row", op.getInternalObjectId());
                    }
                    DatastoreAdapter dba = storeMgr.getDatastoreAdapter();
                    int jdbcMajorVersion = dba.getDriverMajorVersion();
                    if (dba.getDatastoreDriverName().equalsIgnoreCase(OracleAdapter.OJDBC_DRIVER_NAME) && jdbcMajorVersion < 10) {
                        // Oracle JDBC drivers version 9 and below use some sh*tty Oracle-specific CLOB type
                        // we have to cast to that, face west, pray whilst saying ommmmmmmmmmm
                        oracle.sql.CLOB clob = (oracle.sql.CLOB) rs.getClob(1);
                        if (clob != null) {
                            // Deprecated but what can you do
                            clob.putString(1, value);
                        }
                    } else {
                        // Oracle JDBC drivers 10 and above supposedly use the JDBC standard class for Clobs
                        java.sql.Clob clob = rs.getClob(1);
                        if (clob != null) {
                            clob.setString(1, value);
                        }
                    }
                } finally {
                    rs.close();
                }
            } finally {
                sqlControl.closeStatement(mconn, ps);
            }
        } finally {
            mconn.release();
        }
    } catch (SQLException e) {
        throw new NucleusDataStoreException("Update of CLOB value failed: " + textStmt, e);
    }
}

Example 2 with ManagedConnection

use of org.datanucleus.store.connection.ManagedConnection in project datanucleus-rdbms by datanucleus.

the class SQLQuery method performExecute.

/**
 * Execute the query and return the result.
 * For a SELECT query this will be the QueryResult.
 * For an UPDATE/DELETE it will be the row count for the update statement.
 * @param parameters the Map containing all of the parameters (positional parameters) (not null)
 * @return the result of the query
 */
protected Object performExecute(Map parameters) {
    if (parameters.size() != (parameterNames != null ? parameterNames.length : 0)) {
        throw new NucleusUserException(Localiser.msg("059019", (parameterNames != null) ? "" + parameterNames.length : 0, "" + parameters.size()));
    }
    if (type == QueryType.BULK_DELETE || type == QueryType.BULK_UPDATE) {
        // Update/Delete statement (INSERT/UPDATE/DELETE/MERGE)
        try {
            RDBMSStoreManager storeMgr = (RDBMSStoreManager) getStoreManager();
            ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
            SQLController sqlControl = storeMgr.getSQLController();
            try {
                PreparedStatement ps = sqlControl.getStatementForUpdate(mconn, compiledSQL, false);
                try {
                    // Set the values of any parameters
                    for (int i = 0; i < parameters.size(); i++) {
                        ps.setObject((i + 1), parameters.get(Integer.valueOf(i + 1)));
                    }
                    // Execute the update statement
                    int[] rcs = sqlControl.executeStatementUpdate(ec, mconn, compiledSQL, ps, true);
                    // Return a single Long with the number of records updated
                    return Long.valueOf(rcs[0]);
                } finally {
                    sqlControl.closeStatement(mconn, ps);
                }
            } finally {
                mconn.release();
            }
        } catch (SQLException e) {
            throw new NucleusDataStoreException(Localiser.msg("059025", compiledSQL), e);
        }
    } else if (type == QueryType.SELECT) {
        // Query statement (SELECT, stored-procedure)
        AbstractRDBMSQueryResult qr = null;
        try {
            RDBMSStoreManager storeMgr = (RDBMSStoreManager) getStoreManager();
            ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
            SQLController sqlControl = storeMgr.getSQLController();
            try {
                PreparedStatement ps = RDBMSQueryUtils.getPreparedStatementForQuery(mconn, compiledSQL, this);
                try {
                    // Set the values of any parameters
                    for (int i = 0; i < parameters.size(); i++) {
                        ps.setObject((i + 1), parameters.get(Integer.valueOf(i + 1)));
                    }
                    // Apply any user-specified constraints over timeouts and ResultSet
                    RDBMSQueryUtils.prepareStatementForExecution(ps, this, true);
                    ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, compiledSQL, ps);
                    try {
                        // Generate a ResultObjectFactory
                        ResultObjectFactory rof = null;
                        if (resultMetaData != null) {
                            // Each row of the ResultSet is defined by MetaData
                            rof = new ResultMetaDataROF(ec, rs, ignoreCache, resultMetaData);
                        } else if (resultClass != null || candidateClass == null) {
                            // Each row of the ResultSet is either an instance of resultClass, or Object[]
                            rof = RDBMSQueryUtils.getResultObjectFactoryForNoCandidateClass(ec, rs, resultClass);
                        } else {
                            // Each row of the ResultSet is an instance of the candidate class
                            rof = getResultObjectFactoryForCandidateClass(rs);
                        }
                        // Return the associated type of results depending on whether scrollable or not
                        qr = RDBMSQueryUtils.getQueryResultForQuery(this, rof, rs, null);
                        qr.initialise();
                        final QueryResult qr1 = qr;
                        final ManagedConnection mconn1 = mconn;
                        mconn.addListener(new ManagedConnectionResourceListener() {

                            public void transactionFlushed() {
                            }

                            public void transactionPreClose() {
                                // Disconnect the query from this ManagedConnection (read in unread rows etc)
                                qr1.disconnect();
                            }

                            public void managedConnectionPreClose() {
                                if (!ec.getTransaction().isActive()) {
                                    // Disconnect the query from this ManagedConnection (read in unread rows etc)
                                    qr1.disconnect();
                                }
                            }

                            public void managedConnectionPostClose() {
                            }

                            public void resourcePostClose() {
                                mconn1.removeListener(this);
                            }
                        });
                    } finally {
                        if (qr == null) {
                            rs.close();
                        }
                    }
                } catch (QueryInterruptedException qie) {
                    // Execution was cancelled so cancel the PreparedStatement
                    ps.cancel();
                    throw qie;
                } finally {
                    if (qr == null) {
                        sqlControl.closeStatement(mconn, ps);
                    }
                }
            } finally {
                mconn.release();
            }
        } catch (SQLException e) {
            throw new NucleusDataStoreException(Localiser.msg("059025", compiledSQL), e);
        }
        return qr;
    } else {
        // 'Other' statement (manually invoked stored-procedure?, CREATE?, DROP?, or similar)
        try {
            RDBMSStoreManager storeMgr = (RDBMSStoreManager) getStoreManager();
            ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
            SQLController sqlControl = storeMgr.getSQLController();
            try {
                PreparedStatement ps = RDBMSQueryUtils.getPreparedStatementForQuery(mconn, compiledSQL, this);
                try {
                    // Set the values of any parameters
                    for (int i = 0; i < parameters.size(); i++) {
                        ps.setObject((i + 1), parameters.get(Integer.valueOf(i + 1)));
                    }
                    // Apply any user-specified constraints over timeouts etc
                    RDBMSQueryUtils.prepareStatementForExecution(ps, this, false);
                    sqlControl.executeStatement(ec, mconn, compiledSQL, ps);
                } catch (QueryInterruptedException qie) {
                    // Execution was cancelled so cancel the PreparedStatement
                    ps.cancel();
                    throw qie;
                } finally {
                    sqlControl.closeStatement(mconn, ps);
                }
            } finally {
                mconn.release();
            }
        } catch (SQLException e) {
            throw new NucleusDataStoreException(Localiser.msg("059025", compiledSQL), e);
        }
        return true;
    }
}

Example 3 with ManagedConnection

use of org.datanucleus.store.connection.ManagedConnection in project datanucleus-rdbms by datanucleus.

the class JDOQLQuery method performExecute.

protected Object performExecute(Map parameters) {
    if (statementReturnsEmpty) {
        return Collections.EMPTY_LIST;
    }
    boolean inMemory = evaluateInMemory();
    if (candidateCollection != null) {
        // Supplied collection of instances, so evaluate in-memory
        if (candidateCollection.isEmpty()) {
            return Collections.EMPTY_LIST;
        } else if (inMemory) {
            return new JDOQLInMemoryEvaluator(this, new ArrayList(candidateCollection), compilation, parameters, clr).execute(true, true, true, true, true);
        }
    } else if (type == QueryType.SELECT) {
        // Query results are cached, so return those
        List<Object> cachedResults = getQueryManager().getQueryResult(this, parameters);
        if (cachedResults != null) {
            return new CandidateIdsQueryResult(this, cachedResults);
        }
    }
    Object results = null;
    RDBMSStoreManager storeMgr = (RDBMSStoreManager) getStoreManager();
    ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
    try {
        // Execute the query
        long startTime = System.currentTimeMillis();
        if (NucleusLogger.QUERY.isDebugEnabled()) {
            NucleusLogger.QUERY.debug(Localiser.msg("021046", getLanguage(), getSingleStringQuery(), null));
        }
        AbstractClassMetaData acmd = ec.getMetaDataManager().getMetaDataForClass(candidateClass, clr);
        SQLController sqlControl = storeMgr.getSQLController();
        PreparedStatement ps = null;
        try {
            if (type == QueryType.SELECT) {
                // Create PreparedStatement and apply parameters, result settings etc
                ps = RDBMSQueryUtils.getPreparedStatementForQuery(mconn, datastoreCompilation.getSQL(), this);
                SQLStatementHelper.applyParametersToStatement(ps, ec, datastoreCompilation.getStatementParameters(), datastoreCompilation.getParameterNameByPosition(), parameters);
                RDBMSQueryUtils.prepareStatementForExecution(ps, this, true);
                registerTask(ps);
                ResultSet rs = null;
                try {
                    rs = sqlControl.executeStatementQuery(ec, mconn, toString(), ps);
                } finally {
                    deregisterTask();
                }
                AbstractRDBMSQueryResult qr = null;
                try {
                    if (inMemory) {
                        // IN-MEMORY EVALUATION
                        ResultObjectFactory rof = new PersistentClassROF(ec, rs, ignoreCache, datastoreCompilation.getResultDefinitionForClass(), acmd, candidateClass);
                        // Just instantiate the candidates for later in-memory processing
                        // TODO Use a queryResult rather than an ArrayList so we load when required
                        List candidates = new ArrayList();
                        while (rs.next()) {
                            candidates.add(rof.getObject());
                        }
                        // Perform in-memory filter/result/order etc
                        results = new JDOQLInMemoryEvaluator(this, candidates, compilation, parameters, clr).execute(true, true, true, true, true);
                    } else {
                        // IN-DATASTORE EVALUATION
                        ResultObjectFactory rof = null;
                        if (result != null) {
                            // Each result row is of a result type
                            rof = new ResultClassROF(ec, rs, ignoreCache, resultClass, datastoreCompilation.getResultDefinition());
                        } else if (resultClass != null && resultClass != candidateClass) {
                            rof = new ResultClassROF(ec, rs, ignoreCache, resultClass, datastoreCompilation.getResultDefinitionForClass());
                        } else {
                            // Each result row is a candidate object
                            rof = new PersistentClassROF(ec, rs, ignoreCache, datastoreCompilation.getResultDefinitionForClass(), acmd, candidateClass);
                        }
                        // Create the required type of QueryResult
                        qr = RDBMSQueryUtils.getQueryResultForQuery(this, rof, rs, getResultDistinct() ? null : candidateCollection);
                        // Register any bulk loaded member resultSets that need loading
                        Map<String, IteratorStatement> scoIterStmts = datastoreCompilation.getSCOIteratorStatements();
                        if (scoIterStmts != null) {
                            Iterator<Map.Entry<String, IteratorStatement>> scoStmtIter = scoIterStmts.entrySet().iterator();
                            while (scoStmtIter.hasNext()) {
                                Map.Entry<String, IteratorStatement> stmtIterEntry = scoStmtIter.next();
                                IteratorStatement iterStmt = stmtIterEntry.getValue();
                                String iterStmtSQL = iterStmt.getSelectStatement().getSQLText().toSQL();
                                NucleusLogger.DATASTORE_RETRIEVE.debug("JDOQL Bulk-Fetch of " + iterStmt.getBackingStore().getOwnerMemberMetaData().getFullFieldName());
                                try {
                                    PreparedStatement psSco = sqlControl.getStatementForQuery(mconn, iterStmtSQL);
                                    if (datastoreCompilation.getStatementParameters() != null) {
                                        BulkFetchHandler.applyParametersToStatement(ec, psSco, datastoreCompilation, iterStmt.getSelectStatement(), parameters);
                                    }
                                    ResultSet rsSCO = sqlControl.executeStatementQuery(ec, mconn, iterStmtSQL, psSco);
                                    qr.registerMemberBulkResultSet(iterStmt, rsSCO);
                                } catch (SQLException e) {
                                    throw new NucleusDataStoreException(Localiser.msg("056006", iterStmtSQL), e);
                                }
                            }
                        }
                        // Initialise the QueryResult for use
                        qr.initialise();
                        // Add hooks for closing query resources
                        final QueryResult qr1 = qr;
                        final ManagedConnection mconn1 = mconn;
                        ManagedConnectionResourceListener listener = new ManagedConnectionResourceListener() {

                            public void transactionFlushed() {
                            }

                            public void transactionPreClose() {
                                // Tx : disconnect query from ManagedConnection (read in unread rows etc)
                                qr1.disconnect();
                            }

                            public void managedConnectionPreClose() {
                                if (!ec.getTransaction().isActive()) {
                                    // Non-Tx : disconnect query from ManagedConnection (read in unread rows etc)
                                    qr1.disconnect();
                                }
                            }

                            public void managedConnectionPostClose() {
                            }

                            public void resourcePostClose() {
                                mconn1.removeListener(this);
                            }
                        };
                        mconn.addListener(listener);
                        qr.addConnectionListener(listener);
                        results = qr;
                    }
                } finally {
                    if (qr == null) {
                        rs.close();
                    }
                }
            } else if (type == QueryType.BULK_UPDATE || type == QueryType.BULK_DELETE) {
                long bulkResult = 0;
                List<StatementCompilation> stmtCompilations = datastoreCompilation.getStatementCompilations();
                Iterator<StatementCompilation> stmtCompileIter = stmtCompilations.iterator();
                while (stmtCompileIter.hasNext()) {
                    StatementCompilation stmtCompile = stmtCompileIter.next();
                    ps = sqlControl.getStatementForUpdate(mconn, stmtCompile.getSQL(), false);
                    SQLStatementHelper.applyParametersToStatement(ps, ec, datastoreCompilation.getStatementParameters(), datastoreCompilation.getParameterNameByPosition(), parameters);
                    RDBMSQueryUtils.prepareStatementForExecution(ps, this, false);
                    int[] execResults = sqlControl.executeStatementUpdate(ec, mconn, toString(), ps, true);
                    if (stmtCompile.useInCount()) {
                        bulkResult += execResults[0];
                    }
                }
                try {
                    // Evict all objects of this type from the cache
                    ec.getNucleusContext().getLevel2Cache().evictAll(candidateClass, subclasses);
                } catch (UnsupportedOperationException uoe) {
                // Do nothing
                }
                results = bulkResult;
            }
        } catch (SQLException sqle) {
            if (storeMgr.getDatastoreAdapter().isStatementCancel(sqle)) {
                throw new QueryInterruptedException("Query has been interrupted", sqle);
            } else if (storeMgr.getDatastoreAdapter().isStatementTimeout(sqle)) {
                throw new QueryTimeoutException("Query has been timed out", sqle);
            }
            throw new NucleusException(Localiser.msg("021042", datastoreCompilation.getSQL()), sqle);
        }
        if (NucleusLogger.QUERY.isDebugEnabled()) {
            NucleusLogger.QUERY.debug(Localiser.msg("021074", getLanguage(), "" + (System.currentTimeMillis() - startTime)));
        }
        return results;
    } finally {
        mconn.release();
    }
}

Example 4 with ManagedConnection

use of org.datanucleus.store.connection.ManagedConnection in project datanucleus-rdbms by datanucleus.

the class DeleteRequest method execute.

/**
 * Method performing the deletion of the record from the datastore.
 * Takes the constructed deletion query and populates with the specific record information.
 * @param op The ObjectProvider for the record to be deleted.
 */
public void execute(ObjectProvider op) {
    if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
        // Debug information about what we are deleting
        NucleusLogger.PERSISTENCE.debug(Localiser.msg("052210", op.getObjectAsPrintable(), table));
    }
    // Process all related fields first
    // a). Delete any dependent objects
    // b). Null any non-dependent objects with FK at other side
    ClassLoaderResolver clr = op.getExecutionContext().getClassLoaderResolver();
    Set relatedObjectsToDelete = null;
    for (int i = 0; i < callbacks.length; ++i) {
        if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
            NucleusLogger.PERSISTENCE.debug(Localiser.msg("052212", op.getObjectAsPrintable(), ((JavaTypeMapping) callbacks[i]).getMemberMetaData().getFullFieldName()));
        }
        callbacks[i].preDelete(op);
        // Check for any dependent related 1-1 objects where we hold the FK and where the object hasn't been deleted.
        // This can happen if this DeleteRequest was triggered by delete-orphans and so the related object has to be deleted *after* this object.
        // It's likely we could do this better by using AttachFieldManager and just marking the "orphan" (i.e this object) as deleted
        // (see AttachFieldManager TODO regarding when not copying)
        JavaTypeMapping mapping = (JavaTypeMapping) callbacks[i];
        AbstractMemberMetaData mmd = mapping.getMemberMetaData();
        RelationType relationType = mmd.getRelationType(clr);
        if (mmd.isDependent() && (relationType == RelationType.ONE_TO_ONE_UNI || (relationType == RelationType.ONE_TO_ONE_BI && mmd.getMappedBy() == null))) {
            try {
                op.isLoaded(mmd.getAbsoluteFieldNumber());
                Object relatedPc = op.provideField(mmd.getAbsoluteFieldNumber());
                boolean relatedObjectDeleted = op.getExecutionContext().getApiAdapter().isDeleted(relatedPc);
                if (!relatedObjectDeleted) {
                    if (relatedObjectsToDelete == null) {
                        relatedObjectsToDelete = new HashSet();
                    }
                    relatedObjectsToDelete.add(relatedPc);
                }
            } catch (// Should be XXXObjectNotFoundException but dont want to use JDO class
            Exception e) {
            }
        }
    }
    // and cater for other cases, in particular persistent interfaces
    if (oneToOneNonOwnerFields != null && oneToOneNonOwnerFields.length > 0) {
        for (int i = 0; i < oneToOneNonOwnerFields.length; i++) {
            AbstractMemberMetaData relatedFmd = oneToOneNonOwnerFields[i];
            updateOneToOneBidirectionalOwnerObjectForField(op, relatedFmd);
        }
    }
    // Choose the statement based on whether optimistic or not
    String stmt = null;
    ExecutionContext ec = op.getExecutionContext();
    RDBMSStoreManager storeMgr = table.getStoreManager();
    boolean optimisticChecks = false;
    if (table.getSurrogateColumn(SurrogateColumnType.SOFTDELETE) != null) {
        stmt = softDeleteStmt;
    } else {
        optimisticChecks = (versionMetaData != null && ec.getTransaction().getOptimistic() && versionChecks);
        if (optimisticChecks) {
            stmt = deleteStmtOptimistic;
        } else {
            stmt = deleteStmt;
        }
    }
    // Process the delete of this object
    try {
        ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
        SQLController sqlControl = storeMgr.getSQLController();
        try {
            // Perform the delete
            boolean batch = true;
            if (optimisticChecks || !ec.getTransaction().isActive()) {
                // Turn OFF batching if doing optimistic checks (since we need the result of the delete)
                // or if using nontransactional writes (since we want it sending to the datastore now)
                batch = false;
            }
            PreparedStatement ps = sqlControl.getStatementForUpdate(mconn, stmt, batch);
            try {
                // provide WHERE clause field(s)
                if (cmd.getIdentityType() == IdentityType.DATASTORE) {
                    StatementMappingIndex mapIdx = mappingStatementIndex.getWhereDatastoreId();
                    for (int i = 0; i < mapIdx.getNumberOfParameterOccurrences(); i++) {
                        table.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false).setObject(ec, ps, mapIdx.getParameterPositionsForOccurrence(i), op.getInternalObjectId());
                    }
                } else {
                    StatementClassMapping mappingDefinition = new StatementClassMapping();
                    StatementMappingIndex[] idxs = mappingStatementIndex.getWhereFields();
                    for (int i = 0; i < idxs.length; i++) {
                        if (idxs[i] != null) {
                            mappingDefinition.addMappingForMember(i, idxs[i]);
                        }
                    }
                    op.provideFields(whereFieldNumbers, new ParameterSetter(op, ps, mappingDefinition));
                }
                if (multitenancyStatementMapping != null) {
                    table.getSurrogateMapping(SurrogateColumnType.MULTITENANCY, false).setObject(ec, ps, multitenancyStatementMapping.getParameterPositionsForOccurrence(0), ec.getNucleusContext().getMultiTenancyId(ec, cmd));
                }
                if (optimisticChecks) {
                    // WHERE clause - current version discriminator
                    JavaTypeMapping verMapping = mappingStatementIndex.getWhereVersion().getMapping();
                    Object currentVersion = op.getTransactionalVersion();
                    if (currentVersion == null) {
                        // Somehow the version is not set on this object (not read in ?) so report the bug
                        String msg = Localiser.msg("052202", op.getInternalObjectId(), table);
                        NucleusLogger.PERSISTENCE.error(msg);
                        throw new NucleusException(msg);
                    }
                    StatementMappingIndex mapIdx = mappingStatementIndex.getWhereVersion();
                    for (int i = 0; i < mapIdx.getNumberOfParameterOccurrences(); i++) {
                        verMapping.setObject(ec, ps, mapIdx.getParameterPositionsForOccurrence(i), currentVersion);
                    }
                }
                int[] rcs = sqlControl.executeStatementUpdate(ec, mconn, stmt, ps, !batch);
                if (optimisticChecks && rcs[0] == 0) {
                    // No object deleted so either object disappeared or failed optimistic version checks
                    throw new NucleusOptimisticException(Localiser.msg("052203", op.getObjectAsPrintable(), op.getInternalObjectId(), "" + op.getTransactionalVersion()), op.getObject());
                }
                if (relatedObjectsToDelete != null && !relatedObjectsToDelete.isEmpty()) {
                    // Delete any related objects that need deleting after the delete of this object
                    Iterator iter = relatedObjectsToDelete.iterator();
                    while (iter.hasNext()) {
                        Object relatedObject = iter.next();
                        ec.deleteObjectInternal(relatedObject);
                    }
                }
            } finally {
                sqlControl.closeStatement(mconn, ps);
            }
        } finally {
            mconn.release();
        }
    } catch (SQLException e) {
        String msg = Localiser.msg("052211", op.getObjectAsPrintable(), stmt, e.getMessage());
        NucleusLogger.DATASTORE_PERSIST.warn(msg);
        List exceptions = new ArrayList();
        exceptions.add(e);
        while ((e = e.getNextException()) != null) {
            exceptions.add(e);
        }
        throw new NucleusDataStoreException(msg, (Throwable[]) exceptions.toArray(new Throwable[exceptions.size()]));
    }
}

Example 5 with ManagedConnection

use of org.datanucleus.store.connection.ManagedConnection in project datanucleus-rdbms by datanucleus.

the class FetchRequest method execute.

/* (non-Javadoc)
     * @see org.datanucleus.store.rdbms.request.Request#execute(org.datanucleus.state.ObjectProvider)
     */
public void execute(ObjectProvider op) {
    if (fieldsToFetch != null && NucleusLogger.PERSISTENCE.isDebugEnabled()) {
        // Debug information about what we are retrieving
        NucleusLogger.PERSISTENCE.debug(Localiser.msg("052218", op.getObjectAsPrintable(), fieldsToFetch, table));
    }
    if (((fetchingSurrogateVersion || versionFieldName != null) && numberOfFieldsToFetch == 0) && op.isVersionLoaded()) {
    // Fetching only the version and it is already loaded, so do nothing
    } else if (statementLocked != null) {
        ExecutionContext ec = op.getExecutionContext();
        RDBMSStoreManager storeMgr = table.getStoreManager();
        boolean locked = ec.getSerializeReadForClass(op.getClassMetaData().getFullClassName());
        LockMode lockType = ec.getLockManager().getLockMode(op.getInternalObjectId());
        if (lockType != LockMode.LOCK_NONE) {
            if (lockType == LockMode.LOCK_PESSIMISTIC_READ || lockType == LockMode.LOCK_PESSIMISTIC_WRITE) {
                // Override with pessimistic lock
                locked = true;
            }
        }
        String statement = (locked ? statementLocked : statementUnlocked);
        StatementClassMapping mappingDef = mappingDefinition;
        /*if ((sm.isDeleting() || sm.isDetaching()) && mappingDefinition.hasChildMappingDefinitions())
            {
                // Don't fetch any children since the object is being deleted
                mappingDef = mappingDefinition.cloneStatementMappingWithoutChildren();
            }*/
        try {
            ManagedConnection mconn = storeMgr.getConnectionManager().getConnection(ec);
            SQLController sqlControl = storeMgr.getSQLController();
            try {
                PreparedStatement ps = sqlControl.getStatementForQuery(mconn, statement);
                AbstractClassMetaData cmd = op.getClassMetaData();
                try {
                    // Provide the primary key field(s) to the JDBC statement
                    if (cmd.getIdentityType() == IdentityType.DATASTORE) {
                        StatementMappingIndex datastoreIdx = mappingDef.getMappingForMemberPosition(SurrogateColumnType.DATASTORE_ID.getFieldNumber());
                        for (int i = 0; i < datastoreIdx.getNumberOfParameterOccurrences(); i++) {
                            table.getSurrogateMapping(SurrogateColumnType.DATASTORE_ID, false).setObject(ec, ps, datastoreIdx.getParameterPositionsForOccurrence(i), op.getInternalObjectId());
                        }
                    } else if (cmd.getIdentityType() == IdentityType.APPLICATION) {
                        op.provideFields(cmd.getPKMemberPositions(), new ParameterSetter(op, ps, mappingDef));
                    }
                    JavaTypeMapping multitenancyMapping = table.getSurrogateMapping(SurrogateColumnType.MULTITENANCY, false);
                    if (multitenancyMapping != null) {
                        // Provide the tenant id to the JDBC statement
                        StatementMappingIndex multitenancyIdx = mappingDef.getMappingForMemberPosition(SurrogateColumnType.MULTITENANCY.getFieldNumber());
                        String tenantId = ec.getNucleusContext().getMultiTenancyId(ec, cmd);
                        for (int i = 0; i < multitenancyIdx.getNumberOfParameterOccurrences(); i++) {
                            multitenancyMapping.setObject(ec, ps, multitenancyIdx.getParameterPositionsForOccurrence(i), tenantId);
                        }
                    }
                    JavaTypeMapping softDeleteMapping = table.getSurrogateMapping(SurrogateColumnType.SOFTDELETE, false);
                    if (softDeleteMapping != null) {
                        // Set SoftDelete parameter in statement
                        StatementMappingIndex softDeleteIdx = mappingDefinition.getMappingForMemberPosition(SurrogateColumnType.SOFTDELETE.getFieldNumber());
                        for (int i = 0; i < softDeleteIdx.getNumberOfParameterOccurrences(); i++) {
                            softDeleteMapping.setObject(ec, ps, softDeleteIdx.getParameterPositionsForOccurrence(i), Boolean.FALSE);
                        }
                    }
                    // Execute the statement
                    ResultSet rs = sqlControl.executeStatementQuery(ec, mconn, statement, ps);
                    try {
                        // Check for failure to find the object
                        if (!rs.next()) {
                            if (NucleusLogger.DATASTORE_RETRIEVE.isInfoEnabled()) {
                                NucleusLogger.DATASTORE_RETRIEVE.info(Localiser.msg("050018", op.getInternalObjectId()));
                            }
                            throw new NucleusObjectNotFoundException("No such database row", op.getInternalObjectId());
                        }
                        // Copy the results into the object
                        ResultSetGetter rsGetter = new ResultSetGetter(ec, rs, mappingDef, op.getClassMetaData());
                        rsGetter.setObjectProvider(op);
                        op.replaceFields(memberNumbersToFetch, rsGetter);
                        if (op.getTransactionalVersion() == null) {
                            // Object has no version set so update it from this fetch
                            Object datastoreVersion = null;
                            if (fetchingSurrogateVersion) {
                                // Surrogate version column - get from the result set using the version mapping
                                StatementMappingIndex verIdx = mappingDef.getMappingForMemberPosition(SurrogateColumnType.VERSION.getFieldNumber());
                                datastoreVersion = table.getSurrogateMapping(SurrogateColumnType.VERSION, true).getObject(ec, rs, verIdx.getColumnPositions());
                            } else if (versionFieldName != null) {
                                // Version field - now populated in the field in the object from the results
                                datastoreVersion = op.provideField(cmd.getAbsolutePositionOfMember(versionFieldName));
                            }
                            op.setVersion(datastoreVersion);
                        }
                    } finally {
                        rs.close();
                    }
                } finally {
                    sqlControl.closeStatement(mconn, ps);
                }
            } finally {
                mconn.release();
            }
        } catch (SQLException sqle) {
            String msg = Localiser.msg("052219", op.getObjectAsPrintable(), statement, sqle.getMessage());
            NucleusLogger.DATASTORE_RETRIEVE.warn(msg);
            List exceptions = new ArrayList();
            exceptions.add(sqle);
            while ((sqle = sqle.getNextException()) != null) {
                exceptions.add(sqle);
            }
            throw new NucleusDataStoreException(msg, (Throwable[]) exceptions.toArray(new Throwable[exceptions.size()]));
        }
    }
    // Execute any mapping actions now that we have fetched the fields
    for (int i = 0; i < callbacks.length; ++i) {
        callbacks[i].postFetch(op);
    }
}