openCMIS: Get all the repositories using Atom pub binding

Atom publishing protocol is an application-level protocol for publishing and editing Web resources. The Atom Publishing Protocol is documented in rfc5023. The schema/format of Atom is documented in rfc4287.

If you would like to know more about the ATOM publishing protocol, You can go to my following tutorial series.

https://self-learning-java-tutorial.blogspot.com/2017/05/atom-publishing-protocol.html

How to get all the repositories?

By using the getRepositories() method of SessionFactory class, you can get all the repositories at a given endpoint.

Following is the signature of getRepositorie method.

List<Repository> getRepositories(Map<String, String> parameters);

We need to pass basic information like username, password, atom pub url endpoint and type of binding as 'parameters' to the getRepositories method.

Example

// user credentials

parameters.put(SessionParameter.USER, this.getUserName());

parameters.put(SessionParameter.PASSWORD, this.getPassword());

// connection settings

parameters.put(SessionParameter.ATOMPUB_URL, this.getUrlToConnect());

parameters.put(SessionParameter.BINDING_TYPE, BindingType.ATOMPUB.value());

Find the following working application.

RepositoryUtil.java

package com.sample.util;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.chemistry.opencmis.client.api.Repository;
import org.apache.chemistry.opencmis.client.api.SessionFactory;
import org.apache.chemistry.opencmis.client.runtime.SessionFactoryImpl;

/**
 * Abstrcat super class for all the types of bindings.
 * 
 *
 */
public abstract class RepositoryUtil {
 private String userName;
 private String password;
 private String urlToConnect;
 
 protected Map<String, String> parameters = new HashMap<> ();

 public RepositoryUtil(String userName, String password, String urlToConnect) {
  this.userName = userName;
  this.password = password;
  this.urlToConnect = urlToConnect;
 }

 public abstract void populateProperties();
 
 /**
  * Return all the repositories for given end point.
  * 
  * @param parameters
  * @return
  */
 public List<Repository> getAllRepositories() {
  populateProperties();
  SessionFactory sessionFactory = SessionFactoryImpl.newInstance();
  List<Repository> repositories = sessionFactory.getRepositories(parameters);
  return repositories;
 }

 public String getUserName() {
  return userName;
 }

 public String getPassword() {
  return password;
 }

 public String getUrlToConnect() {
  return urlToConnect;
 }

}

AtomPubBindingRepositoryUtil.java

package com.sample.util;

import org.apache.chemistry.opencmis.commons.SessionParameter;
import org.apache.chemistry.opencmis.commons.enums.BindingType;

public class AtomPubBindingRepositoryUtil extends RepositoryUtil {

 public AtomPubBindingRepositoryUtil(String userName, String password, String urlToConnect) {
  super(userName, password, urlToConnect);
 }

 @Override
 public void populateProperties() {
  // user credentials
  parameters.put(SessionParameter.USER, this.getUserName());
  parameters.put(SessionParameter.PASSWORD, this.getPassword());

  // connection settings
  parameters.put(SessionParameter.ATOMPUB_URL, this.getUrlToConnect());
  parameters.put(SessionParameter.BINDING_TYPE, BindingType.ATOMPUB.value());

 }

}

Test.java

package com.sample.util;

import java.util.List;

import org.apache.chemistry.opencmis.client.api.Repository;

public class Test {

 public static void main(String args[]){
  String urlToConnect = "http://localhost:8080/chemistry-opencmis-server-inmemory-1.1.0/atom11";
  
  RepositoryUtil repoUtil = new AtomPubBindingRepositoryUtil("", "", urlToConnect);
  
  List<Repository> repositories = repoUtil.getAllRepositories();
  
  for(Repository repository : repositories){
   System.out.println(repository.getName());
  }
  
 }
}

Output

Apache Chemistry OpenCMIS InMemory Repository

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