"HotThreadMonitorTarget should extend MonitorTarget");
        assertTrue(TimeoutTarget.class.isAssignableFrom(HotThreadMonitorTarget.class),
                "HotThreadMonitorTarget should implement TimeoutTarget");
    }

    @Test
    public void test_constructor() {
        assertNotNull(target, "Constructor should create instance");

        assertTrue(MonitorTarget.class.isAssignableFrom(SystemMonitorTarget.class), "SystemMonitorTarget should extend MonitorTarget");
        assertTrue(TimeoutTarget.class.isAssignableFrom(SystemMonitorTarget.class), "SystemMonitorTarget should implement TimeoutTarget");
    }

    @Test
    public void test_constructor() {
        assertNotNull(target, "Constructor should create instance");

    public void setMonitorInterval(final int monitorInterval) {
        this.monitorInterval = monitorInterval;
    }

    /**
     * Inner class that implements TimeoutTarget for monitoring job execution.
     */
    static class MonitorTarget implements TimeoutTarget {

        /** The job log being monitored */
        private final JobLog jobLog;

        /**
         * Constructor for MonitorTarget.
         *

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.timer.TimeoutTarget;
import org.codelibs.fess.helper.LogNotificationHelper;
import org.codelibs.fess.helper.LogNotificationHelper.LogNotificationEvent;
import org.codelibs.fess.opensearch.client.SearchEngineClient;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.timer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.timer.TimeoutTarget;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.opensearch.action.admin.cluster.node.stats.NodeStats;

import org.codelibs.core.timer.TimeoutTarget;
import org.codelibs.fess.Constants;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.taglib.FessFunctions;
import org.codelibs.fess.util.ComponentUtil;

/**
 * Abstract base class for monitor targets that implement timeout functionality.
 */
public abstract class MonitorTarget implements TimeoutTarget {

    /**
     * Default constructor.

        assertNotNull(helper);
    }

    @Test
    public void test_init_and_destroy() {
        LogNotificationHelper helper = new LogNotificationHelper();
        // init() registers a TimeoutTarget with TimeoutManager
        helper.init();
        // destroy() cancels the task and flushes; should not throw
        helper.destroy();
    }

    @Test
    public void test_destroy_beforeInit() {