| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.empire.db.context; |
| |
| import java.sql.Connection; |
| |
| import org.apache.empire.db.context.DBRollbackManager.ReleaseAction; |
| import org.apache.empire.dbms.DBMSHandler; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class DBContextStatic extends DBContextBase |
| { // Logger |
| private static final Logger log = LoggerFactory.getLogger(DBContextStatic.class); |
| |
| private final DBMSHandler dbms; |
| private final Connection conn; |
| private final boolean closeOnDiscard; |
| // features |
| private boolean enableRollbackHandling = false; |
| private boolean autoPrepareStmt = false; |
| |
| /** |
| * Global DBRollbackManager |
| * |
| * initialConnectionCapacity = 2 |
| * initialObjectCapacity = 16 |
| */ |
| private static final DBRollbackManager staticRollbackManager = new DBRollbackManager(2, 16); |
| |
| /** |
| * Creates a static DBContext with default options |
| * @param dbmsHandler |
| * @param conn |
| */ |
| public DBContextStatic(DBMSHandler dbmsHandler, Connection conn) |
| { |
| this(dbmsHandler, conn, false); |
| } |
| |
| /** |
| * Creates a static DBContext with custom options |
| * @param dbmsHandler |
| * @param conn |
| * @param enableRollbackHandling |
| * @param closeOnDiscard |
| */ |
| public DBContextStatic(DBMSHandler dbmsHandler, Connection conn, boolean closeOnDiscard) |
| { |
| this.dbms = dbmsHandler; |
| this.conn = conn; |
| this.closeOnDiscard = closeOnDiscard; |
| } |
| |
| @Override |
| public DBMSHandler getDbms() |
| { |
| return dbms; |
| } |
| |
| @Override |
| public boolean isPreparedStatementsEnabled() |
| { |
| return autoPrepareStmt; |
| } |
| |
| /** |
| * enables or disables the use of prepared statements for update and insert commands as well as for read operations on a DBRecord. |
| * Note: For custom SQL commands parameters must be explicitly declared using cmd.addCmdParam(); |
| * @param preparedStatementsEnabled |
| */ |
| public DBContextStatic setPreparedStatementsEnabled(boolean enabled) |
| { |
| this.autoPrepareStmt = enabled; |
| // log prepared statement |
| log.info("PreparedStatementsEnabled has been set to " + autoPrepareStmt); |
| return this; |
| } |
| |
| @Override |
| public boolean isRollbackHandlingEnabled() |
| { |
| return enableRollbackHandling; |
| } |
| |
| public DBContextStatic setRollbackHandlingEnabled(boolean enabled) |
| { |
| this.enableRollbackHandling = enabled; |
| // log prepared statement |
| log.info("RollbackHandlingEnabled has been set to " + enableRollbackHandling); |
| return this; |
| } |
| |
| @Override |
| public void discard() |
| { |
| super.discard(); |
| // close |
| if (closeOnDiscard) |
| { // rollbackManager release |
| if (enableRollbackHandling) |
| staticRollbackManager.releaseConnection(conn, ReleaseAction.Discard); |
| // Close the connection |
| closeConnection(); |
| } |
| } |
| |
| @Override |
| protected Connection getConnection(boolean create) |
| { |
| return conn; |
| } |
| |
| @Override |
| protected DBRollbackManager getRollbackManager(boolean create) |
| { |
| return staticRollbackManager; |
| } |
| } |