| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.jdbc.EmbedXAConnection |
| 4 | |
| 5 | Copyright 2003, 2005 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.jdbc; |
| 22 | |
| 23 | import org.apache.derby.impl.jdbc.Util; |
| 24 | import org.apache.derby.iapi.jdbc.EngineConnection; |
| 25 | import org.apache.derby.iapi.jdbc.ResourceAdapter; |
| 26 | |
| 27 | import org.apache.derby.iapi.reference.SQLState; |
| 28 | import org.apache.derby.iapi.reference.JDBC30Translation; |
| 29 | |
| 30 | import java.sql.Connection; |
| 31 | import java.sql.SQLException; |
| 32 | import java.sql.Statement; |
| 33 | import java.sql.PreparedStatement; |
| 34 | import java.sql.CallableStatement; |
| 35 | import javax.transaction.xa.XAResource; |
| 36 | |
| 37 | /** -- jdbc 2.0. extension -- */ |
| 38 | import javax.sql.XAConnection; |
| 39 | |
| 40 | /** |
| 41 | */ |
| 42 | class EmbedXAConnection extends EmbedPooledConnection |
| 43 | implements XAConnection |
| 44 | |
| 45 | { |
| 46 | |
| 47 | private EmbedXAResource xaRes; |
| 48 | |
| 49 | EmbedXAConnection(EmbeddedDataSource ds, ResourceAdapter ra, String u, String p, boolean requestPassword) throws SQLException |
| 50 | { |
| 51 | super(ds, u, p, requestPassword); |
| 52 | xaRes = new EmbedXAResource (this, ra); |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | ** XAConnection methods |
| 57 | */ |
| 58 | |
| 59 | public final synchronized XAResource getXAResource() throws SQLException { |
| 60 | checkActive(); |
| 61 | return xaRes; |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | ** BrokeredConnectionControl api |
| 66 | */ |
| 67 | /** |
| 68 | Allow control over setting auto commit mode. |
| 69 | */ |
| 70 | public void checkAutoCommit(boolean autoCommit) throws SQLException { |
| 71 | if (autoCommit && (xaRes.getCurrentXid () != null)) |
| 72 | throw Util.generateCsSQLException(SQLState.CANNOT_AUTOCOMMIT_XA); |
| 73 | |
| 74 | super.checkAutoCommit(autoCommit); |
| 75 | } |
| 76 | /** |
| 77 | Are held cursors allowed. If the connection is attached to |
| 78 | a global transaction then downgrade the result set holdabilty |
| 79 | to CLOSE_CURSORS_AT_COMMIT if downgrade is true, otherwise |
| 80 | throw an exception. |
| 81 | If the connection is in a local transaction then the |
| 82 | passed in holdabilty is returned. |
| 83 | */ |
| 84 | public int checkHoldCursors(int holdability, boolean downgrade) |
| 85 | throws SQLException |
| 86 | { |
| 87 | if (holdability == JDBC30Translation.HOLD_CURSORS_OVER_COMMIT) { |
| 88 | if (xaRes.getCurrentXid () != null) { |
| 89 | if (!downgrade) |
| 90 | throw Util.generateCsSQLException(SQLState.CANNOT_HOLD_CURSOR_XA); |
| 91 | |
| 92 | holdability = JDBC30Translation.CLOSE_CURSORS_AT_COMMIT; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | return super.checkHoldCursors(holdability, downgrade); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | Allow control over creating a Savepoint (JDBC 3.0) |
| 101 | */ |
| 102 | public void checkSavepoint() throws SQLException { |
| 103 | |
| 104 | if (xaRes.getCurrentXid () != null) |
| 105 | throw Util.generateCsSQLException(SQLState.CANNOT_ROLLBACK_XA); |
| 106 | |
| 107 | super.checkSavepoint(); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | Allow control over calling rollback. |
| 112 | */ |
| 113 | public void checkRollback() throws SQLException { |
| 114 | |
| 115 | if (xaRes.getCurrentXid () != null) |
| 116 | throw Util.generateCsSQLException(SQLState.CANNOT_ROLLBACK_XA); |
| 117 | |
| 118 | super.checkRollback(); |
| 119 | } |
| 120 | /** |
| 121 | Allow control over calling commit. |
| 122 | */ |
| 123 | public void checkCommit() throws SQLException { |
| 124 | |
| 125 | if (xaRes.getCurrentXid () != null) |
| 126 | throw Util.generateCsSQLException(SQLState.CANNOT_COMMIT_XA); |
| 127 | |
| 128 | super.checkCommit(); |
| 129 | } |
| 130 | |
| 131 | public Connection getConnection() throws SQLException |
| 132 | { |
| 133 | Connection handle; |
| 134 | |
| 135 | // Is this just a local transaction? |
| 136 | if (xaRes.getCurrentXid () == null) { |
| 137 | handle = super.getConnection(); |
| 138 | } else { |
| 139 | |
| 140 | if (currentConnectionHandle != null) { |
| 141 | // this can only happen if someone called start(Xid), |
| 142 | // getConnection, getConnection (and we are now the 2nd |
| 143 | // getConnection call). |
| 144 | // Cannot yank a global connection away like, I don't think... |
| 145 | throw Util.generateCsSQLException( |
| 146 | SQLState.CANNOT_CLOSE_ACTIVE_XA_CONNECTION); |
| 147 | } |
| 148 | |
| 149 | handle = getNewCurrentConnectionHandle(); |
| 150 | } |
| 151 | |
| 152 | currentConnectionHandle.syncState(); |
| 153 | |
| 154 | return handle; |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | Wrap and control a Statement |
| 159 | */ |
| 160 | public Statement wrapStatement(Statement s) throws SQLException { |
| 161 | XAStatementControl sc = new XAStatementControl(this, s); |
| 162 | return sc.applicationStatement; |
| 163 | } |
| 164 | /** |
| 165 | Wrap and control a PreparedStatement |
| 166 | */ |
| 167 | public PreparedStatement wrapStatement(PreparedStatement ps, String sql, Object generatedKeys) throws SQLException { |
| 168 | ps = super.wrapStatement(ps,sql,generatedKeys); |
| 169 | XAStatementControl sc = new XAStatementControl(this, ps, sql, generatedKeys); |
| 170 | return (PreparedStatement) sc.applicationStatement; |
| 171 | } |
| 172 | /** |
| 173 | Wrap and control a PreparedStatement |
| 174 | */ |
| 175 | public CallableStatement wrapStatement(CallableStatement cs, String sql) throws SQLException { |
| 176 | cs = super.wrapStatement(cs,sql); |
| 177 | XAStatementControl sc = new XAStatementControl(this, cs, sql); |
| 178 | return (CallableStatement) sc.applicationStatement; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | Override getRealConnection to create a a local connection |
| 183 | when we are not associated with an XA transaction. |
| 184 | |
| 185 | This can occur if the application has a Connection object (conn) |
| 186 | and the following sequence occurs. |
| 187 | |
| 188 | conn = xac.getConnection(); |
| 189 | xac.start(xid, ...) |
| 190 | |
| 191 | // do work with conn |
| 192 | |
| 193 | xac.end(xid, ...); |
| 194 | |
| 195 | // do local work with conn |
| 196 | // need to create new connection here. |
| 197 | */ |
| 198 | public EngineConnection getRealConnection() throws SQLException |
| 199 | { |
| 200 | EngineConnection rc = super.getRealConnection(); |
| 201 | if (rc != null) |
| 202 | return rc; |
| 203 | |
| 204 | openRealConnection(); |
| 205 | |
| 206 | // a new Connection, set its state according to the application's Connection handle |
| 207 | currentConnectionHandle.setState(true); |
| 208 | |
| 209 | return realConnection; |
| 210 | } |
| 211 | } |