org.apache.ibatis.migration.commands.PendingCommand Maven / Gradle / Ivy

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package org.apache.ibatis.migration.commands;

import org.apache.ibatis.migration.*;
import org.apache.ibatis.jdbc.*;

import java.io.*;
import java.util.*;

public class PendingCommand extends BaseCommand {

    public PendingCommand(File repository, String environment, boolean force) {
      super(repository, environment, force);
    }

    public void execute(String... params) {
      try {
        if (!changelogExists()) {
          throw new MigrationException("Change log doesn't exist, no migrations applied.  Try running 'up' instead.");
        }
        List pending = getPendingChanges();
        out.println("WARNING: Running pending migrations out of order can create unexpected results.");
        for (Change change : pending) {
          out.println(horizontalLine("Applying: " + change.getFilename(), 80));
          ScriptRunner runner = getScriptRunner();
          try {
            runner.runScript(new MigrationReader(new FileReader(scriptFile(change.getFilename())), false, environmentProperties()));
          } finally {
            runner.closeConnection();
          }
          insertChangelog(change);
          out.println();            
        }
      } catch (Exception e) {
        throw new MigrationException("Error executing command.  Cause: " + e, e);
      }
    }

  private List getPendingChanges() {
    List pending = new ArrayList();
    List migrations = getMigrations();
    List changelog = getChangelog();
    for (Change change : migrations) {
      int index = changelog.indexOf(change);
      if (index < 0) {
        pending.add(change);
      }
    }
    Collections.sort(pending);
    return pending;
  }

}