Examples of org.apache.derby.impl.jdbc.EmbedConnection

org.apache.derby.impl.jdbc.EmbedConnection
Local implementation of Connection for a JDBC driver in the same process as the database.
There is always a single root (parent) connection. The initial JDBC connection is the root connection. A call to getCurrentConnection() or with the URL jdbc:default:connection yields a nested connection that shares the same root connection as the parent. A nested connection is implemented using this class. The nested connection copies the state of the parent connection and shares some of the same objects (e.g. ContextManager) that are shared across all nesting levels. The proxy also maintains its own state that is distinct from its parent connection (e.g. autocommit or warnings).
SYNCHRONIZATION: Just about all JDBC actions are synchronized across all connections stemming from the same root connection. The synchronization is upon the a synchronized object return by the rootConnection.
Supports
- JDBC 2.0
@see TransactionResourceImpl

        synchronized (tranState) {
            // global transaction is over.
            tranState.associationState = XATransactionState.TC_COMPLETED;
            tranState.notifyAll();
            
            EmbedConnection conn = tranState.conn;
            
            // already set in its own resource
            // or can it be returned to its original resource?
            if ((tranState.creatingResource.con.realConnection == conn) ||
                    (tranState.creatingResource.con.realConnection == null)) {
                
                tranState.creatingResource.con.realConnection = conn;
                
                BrokeredConnection handle = 
                        tranState.creatingResource.con.currentConnectionHandle;
                
                conn.setApplicationConnection(handle);
                
                if (handle != null) {
                    try {
                        handle.setState(true);
                    } catch (SQLException sqle) {

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        synchronized (tranState) {
            // global transaction is over.
            tranState.associationState = XATransactionState.TC_COMPLETED;
            tranState.notifyAll();
            
            EmbedConnection conn = tranState.conn;
            
            // already set in its own resource
            // or can it be returned to its original resource?
            if ((tranState.creatingResource.con.realConnection == conn) ||
                    (tranState.creatingResource.con.realConnection == null)) {
                
                tranState.creatingResource.con.realConnection = conn;
                
                BrokeredConnection handle = 
                        tranState.creatingResource.con.currentConnectionHandle;
                
                conn.setApplicationConnection(handle);
                
                if (handle != null) {
                    try {
                        handle.setState(true);
                    } catch (SQLException sqle) {

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   * @return A nested connection object.
   *
   */
  public Connection getNewNestedConnection(EmbedConnection conn)
  {
    return new EmbedConnection(conn);
  }

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   */
  public EmbedConnection getNewEmbedConnection(String url, Properties info)
     throws SQLException 
  {
    // make a new local connection with a new transaction resource
    return new EmbedConnection(this, url, info);
  }

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                throw new XAException(XAException.XAER_PROTO);
            
            if (tranState.isPrepared == onePhase)
                throw new XAException(XAException.XAER_PROTO);
            
            EmbedConnection conn = tranState.conn;
            
            try {
                conn.xa_commit(onePhase);
            } catch (SQLException sqle) {
                throw wrapInXAException(sqle);
            } finally {
                returnConnectionToResource(tranState, xid_im);
            }

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                throw new XAException(XAException.XAER_PROTO);
            
            if (tranState.isPrepared)
                throw new XAException(XAException.XAER_PROTO);
            
            EmbedConnection conn = tranState.conn;
            
            try {
                
                int ret = conn.xa_prepare();
                
                if (ret == XATransactionController.XA_OK) {
                    tranState.isPrepared = true;
                    
                    return XAResource.XA_OK;

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        synchronized (tranState) {
            // global transaction is over.
            tranState.associationState = XATransactionState.TC_COMPLETED;
            tranState.notifyAll();
            
            EmbedConnection conn = tranState.conn;
            
            // already set in its own resource
            // or can it be returned to its original resource?
            if ((tranState.creatingResource.con.realConnection == conn) ||
                    (tranState.creatingResource.con.realConnection == null)) {
                
                tranState.creatingResource.con.realConnection = conn;
                
                BrokeredConnection handle = 
                        tranState.creatingResource.con.currentConnectionHandle;
                
                conn.setApplicationConnection(handle);
                
                if (handle != null) {
                    try {
                        handle.setState(true);
                    } catch (SQLException sqle) {

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     */
    public static void checkEstimatedRowCount(Connection conn, double expectedCount) throws SQLException {
  if (! (conn instanceof EmbedConnection))
      return;
  
  EmbedConnection econn = (EmbedConnection) conn;
  RunTimeStatistics rts = econn.getLanguageConnection().getRunTimeStatisticsObject();
  assertNotNull(" RuntimeStatistics is null. Did you call SYSCS_UTIL.SYSCS_SET_RUNTIMESTATISTICS(1)?",rts);
  assertEquals((long) expectedCount, (long) rts.getEstimatedRowCount());
  }

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     */
    public static void checkEstimatedRowCount(Connection conn, double expectedCount) throws SQLException {
  if (! (conn instanceof EmbedConnection))
      return;
  
  EmbedConnection econn = (EmbedConnection) conn;
  RunTimeStatistics rts = econn.getLanguageConnection().getRunTimeStatisticsObject();
  assertNotNull(" RuntimeStatistics is null. Did you call SYSCS_UTIL.SYSCS_SET_RUNTIMESTATISTICS(1)?",rts);
  assertEquals((long) expectedCount, (long) rts.getEstimatedRowCount());
  }

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        throw new XAException(XAException.XAER_PROTO);


      if (tranState.isPrepared)
        throw new XAException(XAException.XAER_PROTO);


      EmbedConnection conn = tranState.conn; 


      try {


        int ret = conn.xa_prepare();


        if (ret == XATransactionController.XA_OK) {
          tranState.isPrepared = true;


          return XAResource.XA_OK;

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