<param name="module.zip.version" value="${opensearch.version}" />
		</antcall>
		<!-- reindex -->
		<antcall target="install.module">
			<param name="repo.url" value="${maven.release.repo.url}" />
			<param name="module.groupId" value="org/codelibs/opensearch/module" />
			<param name="module.name.prefix" value="" />
			<param name="module.name" value="reindex" />

| DI Container | Lasta Di |
| Data Access | DBFlute (type-safe ORM for OpenSearch) |
| 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)

import org.junit.jupiter.api.Test;
import org.lastaflute.di.exception.IORuntimeException;
import org.opensearch.common.xcontent.XContentType;
import org.opensearch.core.xcontent.MediaType;
import org.opensearch.core.xcontent.ToXContent;
import org.opensearch.core.xcontent.XContentBuilder;

public class SearchEngineUtilTest extends UnitFessTestCase {

    @Test

import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.opensearch.action.bulk.BulkRequestBuilder;
import org.opensearch.action.bulk.BulkResponse;

/**
 * A timer target that periodically flushes buffered log notification events
 * to an OpenSearch index for downstream processing.
 */

        ComponentUtil.getLogNotificationHelper()
                .offer(new LogNotificationEvent(System.currentTimeMillis(), "WARN", "org.test", "msg2", null));

        // expired() will drain buffer then fail on OpenSearch (not available) but should not throw
        logNotificationTarget.expired();

        // Buffer should be empty after expired() drained it

    private int numOfFragments;
    /** The offset for fragment positioning. */
    private int fragmentOffset;
    /** Custom pre-tags for highlighting (null uses OpenSearch defaults). */
    private String[] preTags;
    /** Custom post-tags for highlighting (null uses OpenSearch defaults). */
    private String[] postTags;

    /**
     * Default constructor that initializes highlighting settings from Fess configuration.

					<excludePackageNames>
						org.codelibs.fess.mylasta.*,
						org.codelibs.fess.opensearch.config.*,
						org.codelibs.fess.opensearch.common.*,
						org.codelibs.fess.opensearch.log.*,
						org.codelibs.fess.opensearch.user.*</excludePackageNames>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-jxr-plugin</artifactId>
				<configuration>

                switch (propertyKey) {
                case "domain.title":
                    return "Test Fess";
                case "search_engine.type":
                    return "opensearch";
                case "test.property":
                    return "config-value";
                case "filter.null":
                    // This would be filtered to null by PropertyFilter in real scenario

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;

/**
 * Helper that manages the lifecycle of the log notification timer and
 * buffers log notification events for periodic flushing to OpenSearch.
 */
public class LogNotificationHelper {

    /**
     * Default constructor.
     */
    public LogNotificationHelper() {
        // Default constructor
    }

    private TimeoutTask timeoutTask;

import org.codelibs.fess.app.web.base.FessAdminAction;
import org.codelibs.fess.helper.CoordinatorHelper;
import org.codelibs.fess.mylasta.direction.FessConfig.SimpleImpl;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.IpAddressUtil;
import org.codelibs.fess.util.SearchEngineUtil;
import org.lastaflute.web.Execute;