* Initiates crawling for specified web and file configurations.
     *
     * @param sessionId The session ID for this crawling operation
     * @param webConfigIdList List of web configuration IDs to crawl, null for all
     * @param fileConfigIdList List of file configuration IDs to crawl, null for all
     */
    public void crawl(final String sessionId, final List<String> webConfigIdList, final List<String> fileConfigIdList) {

     * @param sessionId The session ID.
     */
    @Override
    public void delete(final String sessionId) {
        deleteBySessionId(sessionId);
    }

    /**
     * Gets an access result by session ID and URL.
     *
     * @param sessionId The session ID.
     * @param url The URL.
     * @return The access result, or null if not found.
     */
    @Override

/**
 * UrlFilter checks if a given url is a target one.
 *
 * @author shinsuke
 *
 */
public interface UrlFilter {

    /**
     * Initialize a url filter by sessionId.
     *
     * @param sessionId Session ID
     */
    void init(String sessionId);

    /**
     * Check if a given url is a target.
     *
     * @param url URL
     * @return true if url is matched
     */
    boolean match(String url);

// Count
int count = ds.getCount(sessionId);

// Get by URL
AccessResult result = ds.getAccessResult(sessionId, url);

// Iterate all
ds.iterate(sessionId, accessResult -> {
    System.out.println(accessResult.getUrl());
    System.out.println(accessResult.getContent());
});

// Cleanup
ds.delete(sessionId);
```

### Resource Cleanup Pattern

```java

            "type" : "long"
          },
          "expiredTime" : {
            "type" : "long"
          },
          "name" : {
            "type" : "keyword"
          },
          "sessionId" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021050413",
        "number_of_shards" : "5",

     */
    protected static class Options {
        /**
         * Session ID for filtering thumbnail generation.
         */
        @Option(name = "-s", aliases = "--sessionId", metaVar = "sessionId", usage = "Session ID")
        protected String sessionId;

        /**
         * Name identifier for the thumbnail generation task.
         */
        @Option(name = "-n", aliases = "--name", metaVar = "name", usage = "Name")

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

{
    "properties": {
      "parentUrl": {
        "type": "keyword"
      },
      "method": {
        "type": "keyword"
      },
      "mimeType": {
        "type": "keyword"
      },
      "sessionId": {
        "type": "keyword"
      },
      "url": {
        "type": "keyword"
      },
      "executionTime": {
        "type": "long"
      },
      "createTime": {
        "type": "long"
      },

            0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnSessionId = cci("sessionId", "sessionId", null, null, String.class, "sessionId", null, false, false,
            false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);

    public ColumnInfo columnCreatedTime() {
        return _columnCreatedTime;

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }