/*
 * 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.geode.internal.jta.dunit;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;

import javax.naming.Context;
import javax.naming.NamingException;
import javax.sql.DataSource;
import javax.transaction.UserTransaction;

import org.apache.geode.LogWriter;
import org.apache.geode.cache.Cache;
import org.apache.geode.internal.jta.CacheUtils;

/**
 * This is thread class The objective of this thread class is to implement the inserts and rollback
 * This thread will be called from TxnManagerMultiThreadDUnitTest.java This is to test the
 * concurrent execution of the run method and see if transaction manager handles it properly
 *
 *
 *
 */


public class RollbackThread implements Runnable {

  ///// constructor/////

  public Thread thd;
  public String threadName;
  private LogWriter log;

  public RollbackThread(String name, LogWriter log) {
    threadName = name;
    this.log = log;
    thd = new Thread(this, threadName);
    thd.start();
  }// end of constuctor RollbackThread

  ///// synchronized method/////
  /*
   * This is to make sure that key field in table is getting inserted with a unique value by every
   * thread.
   *
   */

  static int keyFld = 0;

  synchronized public static int getUniqueKey() {
    keyFld = keyFld + 5;
    return keyFld;
  }

  /*
   * Following the the run method of this thread. This method is implemented to inserts the rows in
   * the database and rollback them
   *
   */

  public void run() {

    // Region currRegion=null;
    Cache cache;
    int tblIDFld;
    String tblNameFld;
    // boolean to_continue = true;
    final int XA_INSERTS = 2;

    // get the cache
    // this is used to get the context for transaction later in the same method
    cache = TxnManagerMultiThreadDUnitTest.getCache();

    // get the table name from CacheUtils
    String tblName = CacheUtils.getTableName();

    tblIDFld = 1;
    tblNameFld = "thdOneCommit";

    // initialize cache and get user transaction
    Context ctx = cache.getJNDIContext();
    UserTransaction ta = null;
    Connection xa_conn = null;
    try {
      ta = (UserTransaction) ctx.lookup("java:/UserTransaction");
      // ta.setTransactionTimeout(300);
    } catch (NamingException nme) {
      nme.printStackTrace();
    } catch (Exception e) {
      e.printStackTrace();
    }

    try {
      DataSource d1 = (DataSource) ctx.lookup("java:/SimpleDataSource");
      Connection con = d1.getConnection();
      con.close();
      // Begin the user transaction
      ta.begin();

      // Obtain XAPooledDataSource
      DataSource da = (DataSource) ctx.lookup("java:/XAPooledDataSource");

      // obtain connection from XAPooledDataSource
      xa_conn = da.getConnection();

      Statement xa_stmt = xa_conn.createStatement();

      String sqlSTR;

      // get the unique value for key to be inserted
      int uniqueKey = getUniqueKey();

      // insert XA_INSERTS rows into timestamped table
      for (int i = 0; i < XA_INSERTS; i++) {
        tblIDFld = tblIDFld + uniqueKey + i;
        sqlSTR =
            "insert into " + tblName + " values (" + tblIDFld + "," + "'" + tblNameFld + "'" + ")";
        // log.info("Thread= "+Thread.currentThread()+" ... sqlStr= "+ sqlSTR + "Before update");
        xa_stmt.executeUpdate(sqlSTR);
        // log.info("Thread= "+Thread.currentThread()+" ... sqlStr= "+ sqlSTR + "after update");
      }

      // close the Simple and XA statements
      xa_stmt.close();

      // close the connections
      xa_conn.close();

      // log.info("Thread Before Commit..."+Thread.currentThread());

      // rollback the transaction
      ta.rollback();

    } catch (NamingException nme) {
      nme.printStackTrace();
    } catch (SQLException sqle) {
      sqle.printStackTrace();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (xa_conn != null) {
        try {
          // close the connections
          xa_conn.close();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }

    log.info(XA_INSERTS + ": Rows were inserted and rolled back successfully");
  }// end of run method


}