import org.opensearch.action.DocWriteRequest.OpType;
import org.opensearch.action.bulk.BulkRequestBuilder;
import org.opensearch.action.bulk.BulkResponse;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.action.support.WriteRequest.RefreshPolicy;
import org.opensearch.action.update.UpdateRequestBuilder;
import org.opensearch.common.unit.TimeValue;

			<groupId>org.codelibs</groupId>
			<artifactId>corelib</artifactId>
			<version>${corelib.version}</version>
		</dependency>
		<dependency>
			<groupId>org.opensearch</groupId>
			<artifactId>opensearch</artifactId>
			<version>${opensearch.version}</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.apache.lucene</groupId>
			<artifactId>lucene-queryparser</artifactId>

import org.apache.lucene.search.Query;
import org.codelibs.fess.entity.QueryContext;
import org.codelibs.fess.exception.InvalidQueryException;
import org.lastaflute.core.message.UserMessages;
import org.opensearch.index.query.QueryBuilder;

import jakarta.annotation.PostConstruct;

/**
 * Query processor component that handles query filters and commands.
 * This class provides a pipeline for processing Lucene queries by applying

import org.codelibs.fess.suggest.util.SuggestUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.search.SearchHit;
import org.opensearch.search.sort.SortBuilder;
import org.opensearch.transport.client.Client;

/**
 * <p>

 */
package org.codelibs.fess.crawler.entity;

import java.io.IOException;

import org.opensearch.core.xcontent.ToXContent;
import org.opensearch.core.xcontent.XContentBuilder;

/**
 * OpenSearchUrlFilter is an entity for URL filters in OpenSearch.
 */
public class OpenSearchUrlFilter implements ToXContent {

    /**
     * Creates a new instance of OpenSearchUrlFilter.
     */

- [Customization Guide](https://github.com/codelibs/fess-site-search)

---

### Elasticsearch / OpenSearch

If you're migrating from a standalone Elasticsearch or OpenSearch deployment:

#### Document Migration

**Step 1: Export from Source**

Export documents from your existing Elasticsearch/OpenSearch cluster:

```bash
# Using elasticdump
elasticdump \
  --input=http://old-es-server:9200/my-index \

					<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>

---

## Architecture

### Module Structure

```
fess-crawler-parent/
├── fess-crawler/              # Core framework
├── fess-crawler-lasta/        # LastaFlute DI integration
└── fess-crawler-opensearch/   # OpenSearch backend
```

### Key Design Patterns

- **Factory**: `CrawlerClientFactory`, `ExtractorFactory` - protocol/format-specific component selection

        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

import org.codelibs.fess.suggest.settings.AnalyzerSettings;
import org.codelibs.fess.suggest.settings.SuggestSettings;
import org.opensearch.action.admin.indices.analyze.AnalyzeAction;
import org.opensearch.action.admin.indices.analyze.AnalyzeAction.AnalyzeToken;
import org.opensearch.core.common.Strings;
import org.opensearch.transport.client.Client;

import com.ibm.icu.text.Transliterator;

/**