package com.torrenttunes.server.tools;
/*
* Slightly modified version of the com.ibatis.common.jdbc.ScriptRunner class
* from the iBATIS Apache project. Only removed dependency on Resource class
* and a constructor
* GPSHansl, 06.08.2015: regex for delimiter, rearrange comment/delimiter detection, remove some ide warnings.
*/
/*
* Copyright 2004 Clinton Begin
*
* 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.
*/
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.PrintWriter;
import java.io.Reader;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Tool to run database scripts
*/
public class ScriptRunner {
private static final String DEFAULT_DELIMITER = ";";
/**
* regex to detect delimiter.
* ignores spaces, allows delimiter in comment, allows an equals-sign
*/
public static final Pattern delimP = Pattern.compile("^\\s*(--)?\\s*delimiter\\s*=?\\s*([^\\s]+)+\\s*.*$", Pattern.CASE_INSENSITIVE);
private final Connection connection;
private final boolean stopOnError;
private final boolean autoCommit;
@SuppressWarnings("UseOfSystemOutOrSystemErr")
private PrintWriter logWriter = new PrintWriter(System.out);
@SuppressWarnings("UseOfSystemOutOrSystemErr")
private PrintWriter errorLogWriter = new PrintWriter(System.err);
private String delimiter = DEFAULT_DELIMITER;
private boolean fullLineDelimiter = false;
/**
* Default constructor
*/
public ScriptRunner(Connection connection, boolean autoCommit,
boolean stopOnError) {
this.connection = connection;
this.autoCommit = autoCommit;
this.stopOnError = stopOnError;
}
public void setDelimiter(String delimiter, boolean fullLineDelimiter) {
this.delimiter = delimiter;
this.fullLineDelimiter = fullLineDelimiter;
}
/**
* Setter for logWriter property
*
* @param logWriter - the new value of the logWriter property
*/
public void setLogWriter(PrintWriter logWriter) {
this.logWriter = logWriter;
}
/**
* Setter for errorLogWriter property
*
* @param errorLogWriter - the new value of the errorLogWriter property
*/
public void setErrorLogWriter(PrintWriter errorLogWriter) {
this.errorLogWriter = errorLogWriter;
}
/**
* Runs an SQL script (read in using the Reader parameter)
*
* @param reader - the source of the script
*/
public void runScript(Reader reader) throws IOException, SQLException {
try {
boolean originalAutoCommit = connection.getAutoCommit();
try {
if (originalAutoCommit != this.autoCommit) {
connection.setAutoCommit(this.autoCommit);
}
runScript(connection, reader);
} finally {
connection.setAutoCommit(originalAutoCommit);
}
} catch (IOException | SQLException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException("Error running script. Cause: " + e, e);
}
}
/**
* Runs an SQL script (read in using the Reader parameter) using the
* connection passed in
*
* @param conn - the connection to use for the script
* @param reader - the source of the script
* @throws SQLException if any SQL errors occur
* @throws IOException if there is an error reading from the Reader
*/
private void runScript(Connection conn, Reader reader) throws IOException,
SQLException {
StringBuffer command = null;
try {
LineNumberReader lineReader = new LineNumberReader(reader);
String line;
while ((line = lineReader.readLine()) != null) {
if (command == null) {
command = new StringBuffer();
}
String trimmedLine = line.trim();
final Matcher delimMatch = delimP.matcher(trimmedLine);
if (trimmedLine.length() < 1
|| trimmedLine.startsWith("//")) {
// Do nothing
} else if (delimMatch.matches()) {
setDelimiter(delimMatch.group(2), false);
} else if (trimmedLine.startsWith("--")) {
println(trimmedLine);
} else if (trimmedLine.length() < 1
|| trimmedLine.startsWith("--")) {
// Do nothing
} else if (!fullLineDelimiter
&& trimmedLine.endsWith(getDelimiter())
|| fullLineDelimiter
&& trimmedLine.equals(getDelimiter())) {
command.append(line.substring(0, line
.lastIndexOf(getDelimiter())));
command.append(" ");
Statement statement = conn.createStatement();
println(command);
boolean hasResults = false;
try {
hasResults = statement.execute(command.toString());
} catch (SQLException e) {
final String errText = String.format("Error executing '%s' (line %d): %s", command, lineReader.getLineNumber(), e.getMessage());
if (stopOnError) {
throw new SQLException(errText, e);
} else {
println(errText);
}
}
if (autoCommit && !conn.getAutoCommit()) {
conn.commit();
}
ResultSet rs = statement.getResultSet();
if (hasResults && rs != null) {
ResultSetMetaData md = rs.getMetaData();
int cols = md.getColumnCount();
for (int i = 0; i < cols; i++) {
String name = md.getColumnLabel(i);
print(name + "\t");
}
println("");
while (rs.next()) {
for (int i = 0; i < cols; i++) {
String value = rs.getString(i);
print(value + "\t");
}
println("");
}
}
command = null;
try {
statement.close();
} catch (Exception e) {
// Ignore to workaround a bug in Jakarta DBCP
}
} else {
command.append(line);
command.append("\n");
}
}
if (!autoCommit) {
conn.commit();
}
} catch (Exception e) {
throw new IOException(String.format("Error executing '%s': %s", command, e.getMessage()), e);
} finally {
conn.rollback();
flush();
}
}
private String getDelimiter() {
return delimiter;
}
@SuppressWarnings("UseOfSystemOutOrSystemErr")
private void print(Object o) {
if (logWriter != null) {
System.out.print(o);
}
}
private void println(Object o) {
if (logWriter != null) {
logWriter.println(o);
}
}
private void printlnError(Object o) {
if (errorLogWriter != null) {
errorLogWriter.println(o);
}
}
private void flush() {
if (logWriter != null) {
logWriter.flush();
}
if (errorLogWriter != null) {
errorLogWriter.flush();
}
}
}