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...amcircle.storage/src/org/kompiro/jamcircle/storage/service/internal/DatabaseMigrator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| package org.kompiro.jamcircle.storage.service.internal; | ||
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| import java.io.*; | ||
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| import org.h2.tools.RunScript; | ||
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| public class DatabaseMigrator { | ||
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| private static final String TEMP_SCRIPT = "backup.sql"; | ||
| private PrintStream sysOut = System.out; | ||
| private boolean quiet; | ||
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| public DatabaseMigrator() { | ||
| } | ||
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| /** | ||
| * Migrate a database. | ||
| * | ||
| * @param oldH2Jar | ||
| * the old JAR file | ||
| * @param file | ||
| * the database file (must end with .data.db) or directory | ||
| * @param recursive | ||
| * if the file parameter is in fact a directory (in which | ||
| * case the directory is scanned recursively) | ||
| * @param user | ||
| * the user name of the database | ||
| * @param password | ||
| * the password | ||
| * @param runQuiet | ||
| * to run in quiet mode | ||
| * @throws Exception | ||
| * if conversion fails | ||
| */ | ||
| public void execute(File oldH2Jar, File file, boolean recursive, String user, String password, boolean runQuiet) | ||
| throws Exception { | ||
| String pathToJavaExe = getJavaExecutablePath(); | ||
| this.quiet = runQuiet; | ||
| if (file.isDirectory() && recursive) { | ||
| for (File f : file.listFiles()) { | ||
| execute(oldH2Jar, f, recursive, user, password, runQuiet); | ||
| } | ||
| return; | ||
| } | ||
| if (!file.getName().endsWith(".data.db")) { | ||
| return; | ||
| } | ||
| println("Migrating " + file.getName()); | ||
| String url = "jdbc:h2:" + file.getAbsolutePath(); | ||
| url = url.substring(0, url.length() - ".data.db".length()); | ||
| exec(new String[] { | ||
| pathToJavaExe, | ||
| "-Xmx128m", | ||
| "-cp", oldH2Jar.getAbsolutePath(), | ||
| "org.h2.tools.Script", | ||
| "-script", TEMP_SCRIPT, | ||
| "-url", url, | ||
| "-user", user, | ||
| "-password", password }); | ||
| file.renameTo(new File(file.getAbsoluteFile() + ".backup")); | ||
| RunScript.execute(url, user, password, TEMP_SCRIPT, "UTF-8", true); | ||
| new File(TEMP_SCRIPT).delete(); | ||
| } | ||
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| private String getJavaExecutablePath() { | ||
| String pathToJava; | ||
| if (File.separator.equals("\\")) { | ||
| pathToJava = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java.exe"; | ||
| } else { | ||
| pathToJava = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java"; | ||
| } | ||
| if (!new File(pathToJava).exists()) { | ||
| // Fallback to old behaviour | ||
| pathToJava = "java"; | ||
| } | ||
| return pathToJava; | ||
| } | ||
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| private void println(String s) { | ||
| if (!quiet) { | ||
| sysOut.println(s); | ||
| } | ||
| } | ||
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| private void print(String s) { | ||
| if (!quiet) { | ||
| sysOut.print(s); | ||
| } | ||
| } | ||
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| private int exec(String[] command) { | ||
| try { | ||
| for (String c : command) { | ||
| print(c + " "); | ||
| } | ||
| println(""); | ||
| Process p = Runtime.getRuntime().exec(command); | ||
| copyInThread(p.getInputStream(), quiet ? null : sysOut); | ||
| copyInThread(p.getErrorStream(), quiet ? null : sysOut); | ||
| p.waitFor(); | ||
| return p.exitValue(); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| private void copyInThread(final InputStream in, final OutputStream out) { | ||
| new Thread() { | ||
| public void run() { | ||
| try { | ||
| while (true) { | ||
| int x = in.read(); | ||
| if (x < 0) { | ||
| return; | ||
| } | ||
| if (out != null) { | ||
| out.write(x); | ||
| } | ||
| } | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| }.start(); | ||
| } | ||
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| } |
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