diff options
Diffstat (limited to 'das-java/tags/1.0-incubating-beta2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ConnectionImpl.java')
-rw-r--r-- | das-java/tags/1.0-incubating-beta2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ConnectionImpl.java | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/das-java/tags/1.0-incubating-beta2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ConnectionImpl.java b/das-java/tags/1.0-incubating-beta2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ConnectionImpl.java new file mode 100644 index 0000000000..24341797b6 --- /dev/null +++ b/das-java/tags/1.0-incubating-beta2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ConnectionImpl.java @@ -0,0 +1,154 @@ +/* + * 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.tuscany.das.rdb.impl; + +import java.sql.CallableStatement; +import java.sql.Connection; +import java.sql.DatabaseMetaData; +import java.sql.PreparedStatement; +import java.sql.ResultSet; +import java.sql.SQLException; +import java.sql.Statement; + +import org.apache.log4j.Logger; + +public class ConnectionImpl { + + private final Logger logger = Logger.getLogger(ConnectionImpl.class); + + private Connection connection; + + private boolean managingTransaction = true; + + private String generatedKeysSupported = null; + + public ConnectionImpl(Connection connection) { + this.connection = connection; + + try { + if (connection.getAutoCommit()) { + throw new RuntimeException("AutoCommit must be off"); + } + } catch (SQLException e) { + throw new RuntimeException(e); + } + + } + + public Connection getJDBCConnection() { + return connection; + } + + public String getGeneratedKeysSupported() { + return this.generatedKeysSupported; + } + + public void setGeneratedKeysSupported(String useGetGeneratedKeys){ + this.generatedKeysSupported = useGetGeneratedKeys; + } + + public boolean isGeneratedKeysSupported() { + try{ + if(this.generatedKeysSupported == null){ + DatabaseMetaData dbmsMetadata = this.connection.getMetaData(); + boolean supportsGetGeneratedKeys = dbmsMetadata.supportsGetGeneratedKeys(); + if(supportsGetGeneratedKeys){ + this.generatedKeysSupported = "true"; + } + //currently DERBY partially supports this feature and thus returns FALSE, + //this hardcoding is needed as the partial support is enough for DAS + //we can remove this later, when DERBY change the behaviour of it's "supportsGetGeneratedKeys" + else if(dbmsMetadata.getDatabaseProductName().indexOf("Derby") > 0){ + this.generatedKeysSupported = "true"; + } + else{ + this.generatedKeysSupported = "false"; + } + } + }catch(Exception e){//can be from supportsGetGeneratedKeys or due to absense of supportsGetGeneratedKeys + if (this.logger.isDebugEnabled()) { + this.logger.debug("exception setiing useGetGeneratedKeys false"); + } + this.generatedKeysSupported = "false"; + } + + if (this.logger.isDebugEnabled()) { + this.logger.debug("returning useGetGeneratedKeys():"+ this.generatedKeysSupported); + } + return Boolean.parseBoolean(this.generatedKeysSupported); + } + + public void cleanUp() { + try { + if (managingTransaction) { + if (this.logger.isDebugEnabled()) { + this.logger.debug("Committing Transaction"); + } + connection.commit(); + } + } catch (SQLException e) { + throw new RuntimeException(e); + } + } + + public void errorCleanUp() { + try { + if (managingTransaction) { + if (this.logger.isDebugEnabled()) { + this.logger.debug("Rolling back Transaction"); + } + connection.rollback(); + } + } catch (SQLException e) { + throw new RuntimeException(e); + } + } + + public PreparedStatement prepareStatement(String queryString, String[] returnKeys) throws SQLException { + if (this.logger.isDebugEnabled()) { + this.logger.debug("Preparing Statement: " + queryString); + this.logger.debug("Boolean value for use gen key: " + this.generatedKeysSupported); + } + + if (isGeneratedKeysSupported()) { + return connection.prepareStatement(queryString, Statement.RETURN_GENERATED_KEYS); + } else if (returnKeys.length > 0) { + return connection.prepareStatement(queryString, returnKeys); + } + + return connection.prepareStatement(queryString); + } + + public PreparedStatement preparePagedStatement(String queryString) throws SQLException { + if (this.logger.isDebugEnabled()) { + this.logger.debug("Preparing Statement: " + queryString); + } + + return connection.prepareStatement(queryString, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); + } + + public void setManageTransactions(boolean manageTransactions) { + managingTransaction = manageTransactions; + + } + + public CallableStatement prepareCall(String queryString) throws SQLException { + return connection.prepareCall(queryString); + } +} |