| /** |
| * 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 com.datatorrent.lib.db.jdbc; |
| |
| import java.sql.Connection; |
| import java.sql.DriverManager; |
| import java.sql.SQLException; |
| import java.util.Properties; |
| |
| import javax.validation.constraints.NotNull; |
| |
| import org.codehaus.jackson.annotate.JsonIgnore; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.CharMatcher; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.Iterables; |
| |
| import com.datatorrent.lib.db.Connectable; |
| import com.datatorrent.netlet.util.DTThrowable; |
| |
| /** |
| * A {@link Connectable} that uses jdbc to connect to stores. |
| * |
| * @since 0.9.4 |
| */ |
| public class JdbcStore implements Connectable |
| { |
| protected static final Logger logger = LoggerFactory.getLogger(JdbcStore.class); |
| @NotNull |
| private String databaseUrl; |
| @NotNull |
| private String databaseDriver; |
| private Properties connectionProperties; |
| protected transient Connection connection = null; |
| |
| /* |
| * Connection URL used to connect to the specific database. |
| */ |
| @NotNull |
| public String getDatabaseUrl() |
| { |
| return databaseUrl; |
| } |
| |
| /* |
| * Connection URL used to connect to the specific database. |
| */ |
| public void setDatabaseUrl(@NotNull String databaseUrl) |
| { |
| this.databaseUrl = databaseUrl; |
| } |
| |
| /* |
| * Driver used to connect to the specific database. |
| */ |
| @NotNull |
| public String getDatabaseDriver() |
| { |
| return databaseDriver; |
| } |
| |
| /* |
| * Driver used to connect to the specific database. |
| */ |
| public void setDatabaseDriver(@NotNull String databaseDriver) |
| { |
| this.databaseDriver = databaseDriver; |
| } |
| |
| |
| public JdbcStore() |
| { |
| connectionProperties = new Properties(); |
| } |
| |
| |
| /** |
| * Function to get the connection. |
| * Ignoring "connection" for serialization as it was being used even after |
| * being closed while fetching/displaying the operator properties (refer APEXMALHAR-2351) |
| */ |
| @JsonIgnore |
| public Connection getConnection() |
| { |
| return connection; |
| } |
| |
| /** |
| * Sets the user name. |
| * |
| * @param userName user name |
| * @deprecated use {@link #setConnectionProperties(String)} instead. |
| */ |
| public void setUserName(String userName) |
| { |
| connectionProperties.put("user", userName); |
| } |
| |
| /** |
| * Sets the password. |
| * |
| * @param password password |
| * @deprecated use {@link #setConnectionProperties(String)} instead. |
| */ |
| public void setPassword(String password) |
| { |
| connectionProperties.put("password", password); |
| } |
| |
| /** |
| * Sets the connection properties on JDBC connection. Connection properties are provided as a string. |
| * |
| * @param connectionProps Comma separated list of properties. Property key and value are separated by colon. |
| * eg. user:xyz,password:ijk |
| */ |
| public void setConnectionProperties(String connectionProps) |
| { |
| String[] properties = Iterables.toArray(Splitter.on(CharMatcher.anyOf(":,")).omitEmptyStrings().trimResults() |
| .split(connectionProps), String.class); |
| for (int i = 0; i < properties.length; i += 2) { |
| if (i + 1 < properties.length) { |
| connectionProperties.put(properties[i], properties[i + 1]); |
| } |
| } |
| } |
| |
| /** |
| * Sets the connection properties on JDBC connection. |
| * |
| * @param connectionProperties connection properties. |
| */ |
| public void setConnectionProperties(Properties connectionProperties) |
| { |
| this.connectionProperties = connectionProperties; |
| } |
| |
| /** |
| * Get the connection properties of JDBC connection. |
| */ |
| public Properties getConnectionProperties() |
| { |
| return connectionProperties; |
| } |
| |
| /** |
| * Create connection with database using JDBC. |
| */ |
| @Override |
| public void connect() |
| { |
| try { |
| // This will load the JDBC driver, each DB has its own driver |
| Class.forName(databaseDriver).newInstance(); |
| connection = DriverManager.getConnection(databaseUrl, connectionProperties); |
| |
| logger.debug("JDBC connection Success"); |
| } catch (Throwable t) { |
| DTThrowable.rethrow(t); |
| } |
| } |
| |
| /** |
| * Close JDBC connection. |
| */ |
| @Override |
| public void disconnect() |
| { |
| if (connection != null) { |
| try { |
| connection.close(); |
| } catch (SQLException ex) { |
| throw new RuntimeException("closing database resource", ex); |
| } |
| } |
| } |
| |
| @Override |
| @JsonIgnore |
| public boolean isConnected() |
| { |
| try { |
| return connection != null ? !connection.isClosed() : false; |
| } catch (SQLException e) { |
| throw new RuntimeException("is isConnected", e); |
| } |
| } |
| |
| |
| } |