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package com.emc.documentum.springdata.core;

import org.apache.log4j.Logger;
import org.springframework.data.authentication.UserCredentials;
import org.springframework.stereotype.Controller;
import org.springframework.util.Assert;

import com.documentum.com.DfClientX;
import com.documentum.fc.client.IDfClient;
import com.documentum.fc.client.IDfSession;
import com.documentum.fc.client.IDfSessionManager;
import com.documentum.fc.client.IDfTypedObject;
import com.documentum.fc.common.DfException;
import com.documentum.fc.common.IDfLoginInfo;

@Controller
public class Documentum {

  private Logger logger = Logger.getLogger(Documentum.class);
  private UserCredentials credentials;
  private String docBase;
  private IDfSessionManager sessionManager;


  public Documentum() {
  }

  public void setCredentials(UserCredentials credentials) {
    this.credentials = credentials;
  }

  public void setDocBase(String docBase) {
    this.docBase = docBase;
  }

  public UserCredentials getCredentials() {
    return this.credentials;
  }


  public Documentum(UserCredentials credentials, String docBase, String docbrokerHost, String docbrokerPort)
      throws DfException {

    Assert.notNull(credentials);
    Assert.notNull(docBase);

    this.credentials = credentials;
    this.docBase = docBase;

    createSessionManager(credentials, docbrokerHost, docbrokerPort);
  }

  private void createSessionManager(UserCredentials credentials, String docbrokerHost, String docbrokerPort) throws DfException {
    DfClientX clientX = new DfClientX();
    IDfClient client = clientX.getLocalClient();
    IDfTypedObject config = client.getClientConfig();

    if (docbrokerHost != null && docbrokerPort != null) {
      config.setString("primary_host", docbrokerHost);
      config.setInt("primary_port", new Integer(docbrokerPort));
    }

    this.sessionManager = client.newSessionManager();
    IDfLoginInfo loginInfo = clientX.getLoginInfo();
    loginInfo.setUser(credentials.getUsername());
    loginInfo.setPassword(credentials.getPassword());
    sessionManager.setIdentity(IDfSessionManager.ALL_DOCBASES, loginInfo);
    logger.info("Session Manager Created");
  }


  public IDfSession getSession() throws DfException {
    if (sessionManager == null) {
      logger.info("Creating session manager");
      createSessionManager(this.credentials, null, null);
      logger.info("Created session manager");
    }

    try {
      return this.sessionManager.getSession(this.docBase);
    } catch (Exception e) {
      String msg = String.format(
          "Session cannot be instantiated for user %s for docBase %s. " + "Exception: %s, %s.", this.credentials.getUsername(), docBase, e.getClass(),
          e.getMessage()
      );
      logger.error(msg);
      throw new DfException(msg, e);
    }
  }
}