<commit_before>package liquibase.executor;

import liquibase.Scope;
import liquibase.change.ChangeMetaData;
import liquibase.database.Database;
import liquibase.exception.UnexpectedLiquibaseException;
import liquibase.plugin.AbstractPluginFactory;
import liquibase.plugin.Plugin;
import liquibase.servicelocator.ServiceLocator;

import java.util.*;

public class ExecutorService extends AbstractPluginFactory<Executor>  {

    private Map<String, Executor> executors = new HashMap<>();

    private ExecutorService() {
    }

    @Override
    protected Class<Executor> getPluginClass() {
        return Executor.class;
    }
<commit_msg>Fixes #1402 by using a ConcurrentHashMap<commit_after>package liquibase.executor;

import liquibase.Scope;
import liquibase.change.ChangeMetaData;
import liquibase.database.Database;
import liquibase.exception.UnexpectedLiquibaseException;
import liquibase.plugin.AbstractPluginFactory;
import liquibase.plugin.Plugin;
import liquibase.servicelocator.ServiceLocator;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

public class ExecutorService extends AbstractPluginFactory<Executor>  {

    private Map<String, Executor> executors = new ConcurrentHashMap<>();

    private ExecutorService() {
    }

    @Override
    protected Class<Executor> getPluginClass() {
        return Executor.class;
    }

{'fraction_non_alphanumeric': 0.08308823529411764, 'fraction_numerical': 0.0029411764705882353, 'mean_word_length': 5.511961722488039, 'pattern_counts': {'":': 0, '<': 11, '<?xml version=': 0, '>': 11, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '2893251', 'n_tokens_mistral': 387, 'n_tokens_neox': 365, 'n_words': 81}