<maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
    <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
    <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
    <maven-javadoc-plugin.version>3.12.0</maven-javadoc-plugin.version>
    <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>
    <maven-source-plugin.version>3.3.1</maven-source-plugin.version>

    <maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
    <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
    <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
    <maven-javadoc-plugin.version>3.12.0</maven-javadoc-plugin.version>
    <maven-resources-plugin.version>3.3.1</maven-resources-plugin.version>
    <maven-source-plugin.version>3.3.1</maven-source-plugin.version>

 *       tested in isolation.
 *   <li>The documentation style for testcases is to provide as javadoc a simple sentence or two
 *       describing the property that the testcase method purports to test. The javadocs do not say
 *       anything about how the property is tested. To find out, read the code.

import com.google.errorprone.annotations.concurrent.GuardedBy;
import java.util.List;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;

/** See newDirectExecutorService javadoc for behavioral notes. */
@GwtIncompatible
final class DirectExecutorService extends AbstractListeningExecutorService {

  /** Lock used whenever accessing the state variables (runningTasks, shutdown) of the executor */

mvn formatter:format           # Format code
mvn license:format             # Update license headers
```

### Code Style

- 4 spaces (no tabs)
- Opening brace on same line
- Max line length: 120
- JavaDoc required for public APIs
- License headers required

### Testing

**Structure**: `src/test/java/org/codelibs/fess/crawler/`
**Frameworks**: JUnit 4, UTFlute, Mockito, Testcontainers

      # - 11 (sometimes) to *download* to support anyone who runs JDiff or our Gradle integration tests (including our doc snapshots and our Java 11 CI test run) but not to use directly
      # - 25 for running Javadoc and javac (to help people who build Guava locally and might not use a recent JDK to run Maven)
      - name: 'Set up JDKs'
        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
        with:

            attributes.put("doctype", "book");
            attributes.put("imagesdir", "img");
            attributes.put("nofooter", true);
            attributes.put("javadocPath", "../javadoc");
            attributes.put("sectanchors", true);
            attributes.put("sectlinks", true);
            attributes.put("linkattrs", true);
            attributes.put("reproducible", "");

     */
    AGENT(null, "-agentpath"),

    /**
     * The path identified by the Javadoc {@code -doclet} option.
     * The Java tools location is {@link DocumentationTool.Location#DOCLET_PATH}.
     */
    DOCLET(DocumentationTool.Location.DOCLET_PATH, "-doclet"),

    /**
     * The path identified by the Javadoc {@code -tagletpath} option.
     * The Java tools location is {@link DocumentationTool.Location#TAGLET_PATH}.

				<groupId>org.jacoco</groupId>
				<artifactId>jacoco-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-deploy-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-javadoc-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-jar-plugin</artifactId>
				<configuration>
					<archive>
						<manifestEntries>

				<groupId>org.jacoco</groupId>
				<artifactId>jacoco-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-deploy-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-javadoc-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-jar-plugin</artifactId>
				<configuration>
					<archive>
						<manifestEntries>