| // Copyright 2008 Google Inc. |
| // |
| // Licensed 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 com.google.gwtorm.jdbc; |
| |
| import com.google.gwtorm.client.OrmException; |
| import com.google.gwtorm.client.Transaction; |
| import com.google.gwtorm.client.impl.AbstractTransaction; |
| |
| import java.sql.SQLException; |
| |
| /** Implementation of the {@link Transaction} interface, on JDBC. */ |
| class JdbcTransaction extends AbstractTransaction { |
| private final JdbcSchema schema; |
| private boolean inProgress; |
| private boolean committed; |
| |
| JdbcTransaction(final JdbcSchema s) { |
| schema = s; |
| } |
| |
| @Override |
| public void commit() throws OrmException { |
| notCommitted(); |
| |
| if (!inProgress) { |
| try { |
| schema.getConnection().setAutoCommit(false); |
| } catch (SQLException e) { |
| throw new OrmException("Cannot start transaction", e); |
| } |
| inProgress = true; |
| } |
| |
| try { |
| super.commit(); |
| } catch (OrmException e) { |
| try { |
| rollback(); |
| } catch (OrmException e2) { |
| // Ignore the cascaded rollback error. |
| } |
| throw e; |
| } catch (RuntimeException e) { |
| try { |
| rollback(); |
| } catch (OrmException e2) { |
| // Ignore the cascaded rollback error. |
| } |
| throw e; |
| } |
| |
| try { |
| schema.getConnection().commit(); |
| committed = true; |
| } catch (SQLException e) { |
| throw new OrmException("Transaction failed", e); |
| } finally { |
| exitTransaction(); |
| } |
| } |
| |
| public void rollback() throws OrmException { |
| notCommitted(); |
| |
| if (inProgress) { |
| try { |
| schema.getConnection().rollback(); |
| } catch (SQLException e) { |
| throw new OrmException("Rollback failed", e); |
| } finally { |
| exitTransaction(); |
| } |
| } |
| } |
| |
| private void notCommitted() throws OrmException { |
| if (committed) { |
| throw new OrmException("Transaction already committed"); |
| } |
| } |
| |
| private void exitTransaction() { |
| try { |
| schema.getConnection().setAutoCommit(true); |
| } catch (SQLException e) { |
| } finally { |
| inProgress = false; |
| } |
| } |
| } |