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/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.tools;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.StringTokenizer;
import org.h2.message.DbException;
import org.h2.store.fs.FileUtils;
import org.h2.util.IOUtils;
import org.h2.util.StringUtils;
import org.h2.util.Tool;
/**
* Converts a .trace.db file to a SQL script and Java source code.
*
* SQL statement statistics are listed as well.
*/
public class ConvertTraceFile extends Tool {
private final HashMap stats = new HashMap<>();
private long timeTotal;
/**
* This class holds statistics about a SQL statement.
*/
static class Stat implements Comparable {
String sql;
int executeCount;
long time;
long resultCount;
@Override
public int compareTo(Stat other) {
if (other == this) {
return 0;
}
int c = Long.compare(other.time, time);
if (c == 0) {
c = Integer.compare(other.executeCount, executeCount);
if (c == 0) {
c = sql.compareTo(other.sql);
}
}
return c;
}
}
/**
* Options are case sensitive.
*
* Supported options
* [-help] or [-?]
* Print the list of options [-traceFile <file>]
* The trace file name (default: test.trace.db) [-script <file>]
* The script file name (default: test.sql) [-javaClass <file>]
* The Java directory and class file name (default: Test)
*
* @param args the command line arguments
* @throws SQLException on failure
*/
public static void main(String... args) throws SQLException {
new ConvertTraceFile().runTool(args);
}
@Override
public void runTool(String... args) throws SQLException {
String traceFile = "test.trace.db";
String javaClass = "Test";
String script = "test.sql";
for (int i = 0; args != null && i < args.length; i++) {
String arg = args[i];
if (arg.equals("-traceFile")) {
traceFile = args[++i];
} else if (arg.equals("-javaClass")) {
javaClass = args[++i];
} else if (arg.equals("-script")) {
script = args[++i];
} else if (arg.equals("-help") || arg.equals("-?")) {
showUsage();
return;
} else {
showUsageAndThrowUnsupportedOption(arg);
}
}
try {
convertFile(traceFile, javaClass, script);
} catch (IOException e) {
throw DbException.convertIOException(e, traceFile);
}
}
/**
* Converts a trace file to a Java class file and a script file.
*/
private void convertFile(String traceFileName, String javaClassName,
String script) throws IOException {
LineNumberReader reader = new LineNumberReader(
IOUtils.getReader(
FileUtils.newInputStream(traceFileName)));
PrintWriter javaWriter = new PrintWriter(
IOUtils.getBufferedWriter(
FileUtils.newOutputStream(javaClassName + ".java", false)));
PrintWriter scriptWriter = new PrintWriter(
IOUtils.getBufferedWriter(
FileUtils.newOutputStream(script, false)));
javaWriter.println("import java.io.*;");
javaWriter.println("import java.sql.*;");
javaWriter.println("import java.math.*;");
javaWriter.println("import java.util.Calendar;");
String cn = javaClassName.replace('\\', '/');
int idx = cn.lastIndexOf('/');
if (idx > 0) {
cn = cn.substring(idx + 1);
}
javaWriter.println("public class " + cn + " {");
javaWriter.println(" public static void main(String... args) " +
"throws Exception {");
javaWriter.println(" Class.forName(\"org.h2.Driver\");");
while (true) {
String line = reader.readLine();
if (line == null) {
break;
}
if (line.startsWith("/**/")) {
line = " " + line.substring(4);
javaWriter.println(line);
} else if (line.startsWith("/*SQL")) {
int end = line.indexOf("*/");
String sql = line.substring(end + "*/".length());
sql = StringUtils.javaDecode(sql);
line = line.substring("/*SQL".length(), end);
if (line.length() > 0) {
String statement = sql;
int count = 0;
long time = 0;
line = line.trim();
if (line.length() > 0) {
StringTokenizer tk = new StringTokenizer(line, " :");
while (tk.hasMoreElements()) {
String token = tk.nextToken();
if ("l".equals(token)) {
int len = Integer.parseInt(tk.nextToken());
statement = sql.substring(0, len) + ";";
} else if ("#".equals(token)) {
count = Integer.parseInt(tk.nextToken());
} else if ("t".equals(token)) {
time = Long.parseLong(tk.nextToken());
}
}
}
addToStats(statement, count, time);
}
scriptWriter.println(sql);
}
}
javaWriter.println(" }");
javaWriter.println('}');
reader.close();
javaWriter.close();
if (stats.size() > 0) {
scriptWriter.println("-----------------------------------------");
scriptWriter.println("-- SQL Statement Statistics");
scriptWriter.println("-- time: total time in milliseconds (accumulated)");
scriptWriter.println("-- count: how many times the statement ran");
scriptWriter.println("-- result: total update count or row count");
scriptWriter.println("-----------------------------------------");
scriptWriter.println("-- self accu time count result sql");
int accumTime = 0;
ArrayList list = new ArrayList<>(stats.values());
Collections.sort(list);
if (timeTotal == 0) {
timeTotal = 1;
}
for (Stat stat : list) {
accumTime += stat.time;
StringBuilder buff = new StringBuilder(100);
buff.append("-- ").
append(padNumberLeft(100 * stat.time / timeTotal, 3)).
append("% ").
append(padNumberLeft(100 * accumTime / timeTotal, 3)).
append('%').
append(padNumberLeft(stat.time, 8)).
append(padNumberLeft(stat.executeCount, 8)).
append(padNumberLeft(stat.resultCount, 8)).
append(' ').
append(removeNewlines(stat.sql));
scriptWriter.println(buff.toString());
}
}
scriptWriter.close();
}
private static String removeNewlines(String s) {
return s == null ? s : s.replace('\r', ' ').replace('\n', ' ');
}
private static String padNumberLeft(long number, int digits) {
return StringUtils.pad(Long.toString(number), digits, " ", false);
}
private void addToStats(String sql, int resultCount, long time) {
Stat stat = stats.get(sql);
if (stat == null) {
stat = new Stat();
stat.sql = sql;
stats.put(sql, stat);
}
stat.executeCount++;
stat.resultCount += resultCount;
stat.time += time;
timeTotal += time;
}
}