@Test
    public void test_multiple_commands_configuration() throws Exception {
        // Test setting multiple commands without triggering execution
        final List<String> commands =
                Arrays.asList("command1 ${url} ${outputFile}", "command2 ${url} ${outputFile}", "command3 ${url} ${outputFile}");

        generator.setCommandList(commands);

| Search Engine | OpenSearch |
| App Server | Embedded Tomcat |
| Crawler | fess-crawler library |
| Scheduler | Lasta Job |
| Logging | Log4j2 |
| Testing | JUnit 4/5, UTFlute, REST Assured |

## Development Commands

### Setup
```bash
mvn antrun:run          # Download OpenSearch plugins (required before first build)
mvn dbflute:download    # One-time setup for DBFlute
mvn dbflute:freegen     # Generate DBFlute source code

        }
    }

    private static ExecResult exec(String[] command) throws IOException, InterruptedException, ExecutionException {
        Objects.requireNonNull(command, "command");
        if (command.length == 0) {
            throw new IllegalArgumentException("command must not be empty");
        }

        ProcessBuilder pb = new ProcessBuilder(command);
        Process process = pb.start();

    protected void setUpChild() throws Exception {
        // Get the queryProcessor that was registered in parent class
        queryProcessor = ComponentUtil.getComponent("queryProcessor");

        // Register all query commands needed for testing
        new TermQueryCommand().register();
        new MatchAllQueryCommand().register();
        new PhraseQueryCommand().register();
        new BooleanQueryCommand().register();

                            }
                            if (Constants.CRAWLER_PROCESS_COMMAND_THREAD_DUMP.equals(command)) {
                                ThreadDumpUtil.printThreadDump();
                            } else {
                                logger.warn("Unknown process command: command={}", command);
                            }

This clearly signals to users that they are dealing with a non-public property and should expect no guarantees.

Internal properties MUST NOT be supplemented with command-line options.
They can always be passed via `-D` on the command line.

Examples of properties that follow the naming rules:

* `org.gradle.internal.operations.trace`
* `org.gradle.internal.cmdline.max.length`
* …

import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * Executable class for generating thumbnails for indexed documents.
 * This class provides a command-line interface for thumbnail generation tasks.
 */
public class ThumbnailGenerator {

    private static final Logger logger = LogManager.getLogger(ThumbnailGenerator.class);

    /**

import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.monitor.os.OsProbe;
import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * This class is a command-line application for creating and managing the suggest index.
 * It provides functionality to index words from documents and search logs, as well as
 * to purge old suggest data.
 */
public class SuggestCreator {

    /**

            ComponentUtil.register(newQueryProcessor, "queryProcessor");

            // Register the command with the new processor
            PrefixQueryCommand newCommand = new PrefixQueryCommand();
            newCommand.register();

            // Verify that the command can process PrefixQuery by executing it
            PrefixQuery query = new PrefixQuery(new Term("field", "test"));

        } finally {
            // Clean up if needed
        }

        List<String> cmdList = mockProcessHelper.getLastCommandList();
        assertNotNull(cmdList, "Command list should not be null");
        assertTrue("Command list should not be empty", !cmdList.isEmpty());

        int cpIndex = cmdList.indexOf("-cp");
        assertTrue("Should have -cp argument", cpIndex >= 0);