Пример #1
0
  public C3P0PooledConnection(
      Connection con,
      ConnectionTester connectionTester,
      boolean autoCommitOnClose,
      boolean forceIgnoreUnresolvedTransactions,
      ConnectionCustomizer cc,
      String pdsIdt)
      throws SQLException {
    try {
      if (cc != null) cc.onAcquire(con, pdsIdt);
    } catch (Exception e) {
      throw SqlUtils.toSQLException(e);
    }

    this.physicalConnection = con;
    this.connectionTester = connectionTester;
    this.autoCommitOnClose = autoCommitOnClose;
    this.forceIgnoreUnresolvedTransactions = forceIgnoreUnresolvedTransactions;
    this.supports_setTypeMap =
        C3P0ImplUtils.supportsMethod(con, "setTypeMap", new Class[] {Map.class});
    this.supports_setHoldability =
        C3P0ImplUtils.supportsMethod(con, "setHoldability", new Class[] {int.class});
    this.dflt_txn_isolation = con.getTransactionIsolation();
    this.dflt_catalog = con.getCatalog();
    this.dflt_holdability =
        (supports_setHoldability ? con.getHoldability() : ResultSet.CLOSE_CURSORS_AT_COMMIT);
  }
Пример #2
0
  private void reset(boolean known_resolved_txn) throws SQLException {
    ensureOkay();
    C3P0ImplUtils.resetTxnState(
        physicalConnection,
        forceIgnoreUnresolvedTransactions,
        autoCommitOnClose,
        known_resolved_txn);
    if (isolation_lvl_nondefault) {
      physicalConnection.setTransactionIsolation(dflt_txn_isolation);
      isolation_lvl_nondefault = false;
    }
    if (catalog_nondefault) {
      physicalConnection.setCatalog(dflt_catalog);
      catalog_nondefault = false;
    }
    if (holdability_nondefault) // we don't test if holdability is supported, 'cuz it can never go
                                // nondefault if it's not.
    {
      physicalConnection.setHoldability(dflt_holdability);
      holdability_nondefault = false;
    }

    try {
      physicalConnection.setReadOnly(false);
    } catch (Throwable t) {
      if (logger.isLoggable(MLevel.FINE))
        logger.log(
            MLevel.FINE,
            "A Throwable occurred while trying to reset the readOnly property of our Connection to false!",
            t);
    }

    try {
      if (supports_setTypeMap) physicalConnection.setTypeMap(Collections.EMPTY_MAP);
    } catch (Throwable t) {
      if (logger.isLoggable(MLevel.FINE))
        logger.log(
            MLevel.FINE,
            "A Throwable occurred while trying to reset the typeMap property of our Connection to Collections.EMPTY_MAP!",
            t);
    }
  }
Пример #3
0
    public synchronized Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
      if (OBJECT_METHODS.contains(m)) return m.invoke(this, args);

      try {
        String mname = m.getName();
        if (activeConnection != null) {
          if (mname.equals("rawConnectionOperation")) {
            ensureOkay();
            txn_known_resolved = false;

            return doRawConnectionOperation((Method) args[0], args[1], (Object[]) args[2]);
          } else if (mname.equals("setTransactionIsolation")) {
            ensureOkay();

            // don't modify txn_known_resolved

            m.invoke(activeConnection, args);

            int lvl = ((Integer) args[0]).intValue();
            isolation_lvl_nondefault = (lvl != dflt_txn_isolation);

            // System.err.println("updated txn isolation to " + lvl + ", nondefault level? " +
            // isolation_lvl_nondefault);

            return null;
          } else if (mname.equals("setCatalog")) {
            ensureOkay();

            // don't modify txn_known_resolved

            m.invoke(activeConnection, args);

            String catalog = (String) args[0];
            catalog_nondefault = ObjectUtils.eqOrBothNull(catalog, dflt_catalog);

            return null;
          } else if (mname.equals("setHoldability")) {
            ensureOkay();

            // don't modify txn_known_resolved

            m.invoke(
                activeConnection,
                args); // will throw an exception if setHoldability() not supported...

            int holdability = ((Integer) args[0]).intValue();
            holdability_nondefault = (holdability != dflt_holdability);

            return null;
          } else if (mname.equals("createStatement")) {
            ensureOkay();
            txn_known_resolved = false;

            Object stmt = m.invoke(activeConnection, args);
            return createProxyStatement((Statement) stmt);
          } else if (mname.equals("prepareStatement")) {
            ensureOkay();
            txn_known_resolved = false;

            Object pstmt;
            if (scache == null) {
              pstmt = m.invoke(activeConnection, args);
              return createProxyStatement((Statement) pstmt);
            } else {
              pstmt = scache.checkoutStatement(physicalConnection, m, args);
              return createProxyStatement(true, (Statement) pstmt);
            }
          } else if (mname.equals("prepareCall")) {
            ensureOkay();
            txn_known_resolved = false;

            Object cstmt;
            if (scache == null) {
              cstmt = m.invoke(activeConnection, args);
              return createProxyStatement((Statement) cstmt);
            } else {
              cstmt = scache.checkoutStatement(physicalConnection, m, args);
              return createProxyStatement(true, (Statement) cstmt);
            }
          } else if (mname.equals("getMetaData")) {
            ensureOkay();
            txn_known_resolved = false; // views of tables etc. might be txn dependent

            DatabaseMetaData innerMd = activeConnection.getMetaData();
            if (metaData == null) {
              // exposedProxy is protected by C3P0PooledConnection.this' lock
              synchronized (C3P0PooledConnection.this) {
                metaData =
                    new SetManagedDatabaseMetaData(innerMd, activeMetaDataResultSets, exposedProxy);
              }
            }
            return metaData;
          } else if (mname.equals("silentClose")) {
            // the PooledConnection doesn't have to be okay

            doSilentClose(proxy, ((Boolean) args[0]).booleanValue(), this.txn_known_resolved);
            return null;
          } else if (mname.equals("close")) {
            // the PooledConnection doesn't have to be okay

            Exception e = doSilentClose(proxy, false, this.txn_known_resolved);
            if (!connection_error_signaled) ces.fireConnectionClosed();
            // System.err.println("close() called on a ProxyConnection.");
            if (e != null) {
              // 					    System.err.print("user close exception -- ");
              // 					    e.printStackTrace();
              throw e;
            } else return null;
          }
          // 			    else if ( mname.equals("finalize") ) //REMOVE THIS CASE -- TMP DEBUG
          // 				{
          // 				    System.err.println("Connection apparently finalized!");
          // 				    return m.invoke( activeConnection, args );
          // 				}
          else {
            ensureOkay();

            // we've disabled setting txn_known_resolved to true, ever, because
            // we failed to deal with the case that clients would work with previously
            // acquired Statements and ResultSets after a commit(), rollback(), or setAutoCommit().
            // the new non-reflective proxies have been modified to deal with this case.
            // here, with soon-to-be-deprecated in "traditional reflective proxies mode"
            // we are reverting to the conservative, always-presume-you-have-to-rollback
            // policy.

            // txn_known_resolved = ( mname.equals("commit") || mname.equals( "rollback" ) ||
            // mname.equals( "setAutoCommit" ) );
            txn_known_resolved = false;

            return m.invoke(activeConnection, args);
          }
        } else {
          if (mname.equals("close") || mname.equals("silentClose")) return null;
          else if (mname.equals("isClosed")) return Boolean.TRUE;
          else {
            throw new SQLException("You can't operate on " + "a closed connection!!!");
          }
        }
      } catch (InvocationTargetException e) {
        Throwable convertMe = e.getTargetException();
        SQLException sqle = handleMaybeFatalToPooledConnection(convertMe, proxy, false);
        sqle.fillInStackTrace();
        throw sqle;
      }
    }
Пример #4
0
  // TODO: factor out repetitive debugging code
  private synchronized void close(boolean known_invalid) throws SQLException {
    // System.err.println("Closing " + this);
    if (physicalConnection != null) {
      try {
        StringBuffer debugOnlyLog = null;
        if (Debug.DEBUG && known_invalid) {
          debugOnlyLog = new StringBuffer();
          debugOnlyLog.append("[ exceptions: ");
        }

        Exception exc = cleanupUncachedActiveStatements();
        if (Debug.DEBUG && exc != null) {
          if (known_invalid) debugOnlyLog.append(exc.toString() + ' ');
          else
            logger.log(
                MLevel.WARNING,
                "An exception occurred while cleaning up uncached active Statements.",
                exc);
          // exc.printStackTrace();
        }

        try {
          // we've got to use silentClose() rather than close() here,
          // 'cuz if there's still an exposedProxy (say a user forgot to
          // close his Connection) before we close, and we use regular (loud)
          // close, we will try to check this dead or dying PooledConnection
          // back into the pool. We only want to do this when close is called
          // on user proxies, and the underlying PooledConnection might still
          // be good. The PooledConnection itself should only be closed by the
          // pool.
          if (exposedProxy != null) exposedProxy.silentClose(known_invalid);
        } catch (Exception e) {
          if (Debug.DEBUG) {
            if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
            else logger.log(MLevel.WARNING, "An exception occurred.", exc);
            // e.printStackTrace();
          }
          exc = e;
        }
        try {
          this.closeAll();
        } catch (Exception e) {
          if (Debug.DEBUG) {
            if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
            else logger.log(MLevel.WARNING, "An exception occurred.", exc);
            // e.printStackTrace();
          }
          exc = e;
        }

        try {
          physicalConnection.close();
        } catch (Exception e) {
          if (Debug.DEBUG) {
            if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
            else logger.log(MLevel.WARNING, "An exception occurred.", exc);
            e.printStackTrace();
          }
          exc = e;
        }

        if (exc != null) {
          if (known_invalid) {
            debugOnlyLog.append(" ]");
            if (Debug.DEBUG) {
              // 						System.err.print("[DEBUG]" + this + ": while closing a PooledConnection known
              // to be invalid, ");
              // 						System.err.println("  some exceptions occurred. This is probably not a
              // problem:");
              // 						System.err.println( debugOnlyLog.toString() );

              logger.fine(
                  this
                      + ": while closing a PooledConnection known to be invalid, "
                      + "  some exceptions occurred. This is probably not a problem: "
                      + debugOnlyLog.toString());
            }
          } else
            throw new SQLException(
                "At least one error occurred while attempting "
                    + "to close() the PooledConnection: "
                    + exc);
        }
        if (Debug.TRACE == Debug.TRACE_MAX)
          logger.fine("C3P0PooledConnection closed. [" + this + ']');
        // System.err.println("C3P0PooledConnection closed. [" + this + ']');
      } finally {
        physicalConnection = null;
      }
    }
  }