108 lines
2.7 KiB
Java
108 lines
2.7 KiB
Java
/**
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*
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*/
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package org.gcube.documentstore.persistence;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.Statement;
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import java.util.SortedSet;
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import java.util.TreeSet;
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import org.gcube.documentstore.records.Record;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*/
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public class PersistencePostgreSQL extends PersistenceBackend {
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private static final Logger logger = LoggerFactory.getLogger(PersistencePostgreSQL.class);
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public static final String URL_PROPERTY_KEY = "URL";
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public static final String USERNAME_PROPERTY_KEY = "username";
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public static final String PASSWORD_PROPERTY_KEY = "password";
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private String url;
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private String username;
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private String password;
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private Connection connection;
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private Statement statement;
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@Override
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protected void prepareConnection(PersistenceBackendConfiguration configuration) throws Exception {
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logger.trace("prepareConnection()");
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url = configuration.getProperty(URL_PROPERTY_KEY);
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username = configuration.getProperty(USERNAME_PROPERTY_KEY);
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password = configuration.getProperty(PASSWORD_PROPERTY_KEY);
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}
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@Override
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protected void openConnection() throws Exception {
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logger.trace("openConnection()");
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try {
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Class.forName("org.postgresql.Driver");
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connection = DriverManager.getConnection(url, username, password);
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logger.trace("Opened database successfully");
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connection.setAutoCommit(false);
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statement = connection.createStatement();
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} catch (Exception e) {
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throw e;
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}
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}
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protected String getSQLInsertCommand(Record record) {
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StringBuffer sql = new StringBuffer();
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sql.append("INSERT INTO ");
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sql.append(record.getRecordType()); // tableNme == RecordType
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boolean first = true;
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SortedSet<String> keys = new TreeSet<>(record.getRequiredFields());
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StringBuffer values = new StringBuffer();
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for(String key : keys) {
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if(first) {
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sql.append(" (");
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values.append(" (");
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first = false;
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}else {
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sql.append(",");
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values.append(",");
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}
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sql.append(key);
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values.append(record.getResourceProperty(key));
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}
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sql.append(") VALUES");
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sql.append(values);
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sql.append(");");
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return sql.toString();
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}
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@Override
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protected void reallyAccount(Record record) throws Exception {
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logger.trace("reallyAccount()");
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String sqlCommand = getSQLInsertCommand(record);
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statement.executeUpdate(sqlCommand);
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}
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@Override
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protected void clean() throws Exception {
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logger.trace("clean()");
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}
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@Override
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protected void closeConnection() throws Exception {
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logger.trace("closeConnection()");
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statement.close();
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connection.commit();
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connection.close();
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}
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@Override
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public boolean isConnectionActive() throws Exception {
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return connection.isValid(300);
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};
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}
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