### Create a Session Dependency { #create-a-session-dependency }

A **`Session`** is what stores the **objects in memory** and keeps track of any changes needed in the data, then it **uses the `engine`** to communicate with the database.

We will create a FastAPI **dependency** with `yield` that will provide a new `Session` for each request. This is what ensures that we use a single session per request. 🤓

            this.sessionId = sessionId;
            this.message = message;
            this.sources = sources;
        }

        /**
         * Gets the session ID.
         *
         * @return the session ID
         */
        public String getSessionId() {
            return sessionId;
        }

        // Execute without setting session ID
        String result = crawlJob.execute();

        assertNotNull(crawlJob.sessionId);
        // Check format: yyyyMMddHHmmss
        assertEquals(14, crawlJob.sessionId.length());
        assertTrue(crawlJob.sessionId.matches("\\d{14}"));
        assertTrue(result.contains("Session Id: " + crawlJob.sessionId));
    }

    SmbSession session;
    Object cred;

    SmbComSessionSetupAndX(final SmbSession session, final ServerMessageBlock andx, final Object cred) throws SmbException {
        super(andx);
        command = SMB_COM_SESSION_SETUP_ANDX;
        this.session = session;
        this.cred = cred;

        sessionKey = session.transport.sessionKey;
        capabilities = session.transport.capabilities;

public class DefaultMojoExecution implements MojoExecution {
    private final InternalMavenSession session;
    private final org.apache.maven.plugin.MojoExecution delegate;

    public DefaultMojoExecution(InternalMavenSession session, org.apache.maven.plugin.MojoExecution delegate) {
        this.session = session;
        this.delegate = delegate;
    }

    public org.apache.maven.plugin.MojoExecution getDelegate() {

                    log.trace("Reusing existing session " + ssn);
                }
                return ssn.acquire();
            }
            if (log.isTraceEnabled()) {
                log.trace("Existing session " + ssn + " does not match " + tf.getCredentials());
            }
        }

        /* logoff old sessions */

        if (viewHelper.isUseSession()) {
            LaRequestUtil.getOptionalRequest().ifPresent(request -> {
                final HttpSession session = request.getSession(false);
                if (session != null && form.num != null) {
                    session.setAttribute(Constants.RESULTS_PER_PAGE, form.num);
                }
            });
        }
        return doSearch(form);
    }

    /**

 *     <li>{@linkplain Project#getPomArtifact() the project POM artifact}</li>
 *     <li>{@linkplain Project#getMainArtifact() the main artifact}</li>
 *     <li>{@linkplain org.apache.maven.api.services.ProjectManager#attachArtifact(Session, Project, Path) artifacts to be attached to a project}</li>
 * </ul>
 *
 * <p>For the main artifact and attached artifacts, the
 * {@link org.apache.maven.api.services.ArtifactManager ArtifactManager} service must be used

 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

     * This method starts crawling only for the data configurations
     * specified in the configIdList parameter.
     *
     * @param sessionId unique identifier for this crawling session
     * @param configIdList list of data configuration IDs to crawl
     */
    public void crawl(final String sessionId, final List<String> configIdList) {