Laurent Weichberger

Laurent Weichberger

New York, New York, United States
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Projects

  • Couchbase Mobile Application with Android and Couchbase Lite SDK

    I am going through and making sure all the lab exercises work for CD257 Developing Couchbase Mobile NoSQL Applications. So far so good. I wrote my first Android android.app.Activity:

    /* Much code not shown. This is the constructor code for Android Activity don't use the normal ctor */
    public void onCreate (Bundle savedInstanceState) {

    super.onCreate(savedInstanceState); //because we are supposed to...
    try…

    I am going through and making sure all the lab exercises work for CD257 Developing Couchbase Mobile NoSQL Applications. So far so good. I wrote my first Android android.app.Activity:

    /* Much code not shown. This is the constructor code for Android Activity don't use the normal ctor */
    public void onCreate (Bundle savedInstanceState) {

    super.onCreate(savedInstanceState); //because we are supposed to...
    try {
    setContentView(R.layout.activity_main); 
    Manager manager = this.getManagerInstance(); //Refactored with Singleton
    Database db = this.getDatabaseInstance(); //Refactored with Singleton
    /* Event constructor:
    * String name, String address, String description, String date,
    * String time, String eventType
    */
    Event myEvent = new Event ("Big Baba Gathering", 
    "88 Grove St., New York, NY 10014",
    "Come one, come all!",
    "15 November 1931",
    "7 pm (EST)",
    "Spiritual, Darshan"
    );

    myEvent.setUrl("http://www.lordmeher.org/rev/index.jsp?" +
    "pageBase=page.jsp&nextPage=1312");

    EventRepository eventRepo = new EventRepository(db);

    Event savedEvent = eventRepo.save(myEvent);

    String docId = savedEvent.get_id();
    boolean itExists = eventRepo.exists(docId);
    Event foundEvent = eventRepo.getById(docId);
    if (foundEvent != null) {
    Log.v("Test EventRepository getById() FOUND: ", foundEvent.getName());
    }
    else {
    Log.v("Test EventRepository getById() Document ID NOT FOUND: " + docId, "ERROR");
    }

    foundEvent.setName("Pacific Northwest Gathering"); //different
    foundEvent.setAddress("Ashland, Oregon"); //different
    foundEvent.setDate("31 January 2015"); //different
    foundEvent.setDescription("Closed Circle"); //different
    Event updatedEvent = eventRepo.update(foundEvent);
    boolean wasDeleted = eventRepo.delete(foundEvent);
    boolean itStillExists = eventRepo.exists(docId);

    }

    Other creators
    See project

  • CD220 Developing Couchbase NoSQL Applications with Couchbase Server 2.5 and Java SDK 1.4

    /* All code by Laurent Weichberger: laurent@couchbase.com */
    package com.couchbase.training.playlist.domain;

    /* imports not shown */

    public class PlayListRepositoryImpl implements PlayListRepository {

    private Gson gson = null;
    private CouchbaseClient client = null;
    private String bucketName = null;

    public PlayListRepositoryImpl(){

    bucketName = "CouchMusic";

    String bucketPassword = "Baba";

    client =…

    /* All code by Laurent Weichberger: laurent@couchbase.com */
    package com.couchbase.training.playlist.domain;

    /* imports not shown */

    public class PlayListRepositoryImpl implements PlayListRepository {

    private Gson gson = null;
    private CouchbaseClient client = null;
    private String bucketName = null;

    public PlayListRepositoryImpl(){

    bucketName = "CouchMusic";

    String bucketPassword = "Baba";

    client = CouchbaseClientFactory.getInstance(bucketName, bucketPassword);

    gson = new Gson();

    }

    private CouchbaseClient getClient(){

    return client;
    }

    @Override
    public <S extends PlayList> S update(S playlist) {

    String key = playlist.getPlayListId();

    String jplay = gson.toJson(playlist);

    OperationFuture<Boolean> wasUpdated = this.getClient().replace(key, jplay);
    try {

    if (!wasUpdated.get().booleanValue()) {

    playlist = null;

    }
    }
    catch (ExecutionException ee) {

    playlist = null;
    ee.printStackTrace();


    }catch (InterruptedException ie) {

    playlist = null;
    ie.printStackTrace();
    }

    return playlist;
    }


    @Override
    public PlayList findOne(String key) {

    PlayList onePlayList = null;
    String jsonPlayList = null;

    try{
    /* This is the MemcachedClient get() method we inherit which returns:
    * the result from the cache (null if there is none) */

    Object obj = getClient().get(key);

    if (obj != null) {

    jsonPlayList = (String) obj;
    }

    }
    catch (OperationTimeoutException e) {

    // if the global operation timeout is exceeded
    e.printStackTrace();
    }
    catch (IllegalStateException e) {

    //in the rare circumstance where queue is too full to accept any more requests
    e.printStackTrace();
    }

    onePlayList = gson.fromJson(jsonPlayList, PlayList.class);

    return onePlayList;

    }

    /*much code not shown */
    }

    See project

  • Cassandra with DataStax DSE :: DAO implementations in Java

    -

    I wrote Java code and a series of blog articles on how to create a Data Access Object (DAO) for Cassandra using DataStax DSE Driver code, culminating in the Working with Cassandra BLOBs article.

  • CassandraDAO

    -

    A small sample Java application implementing the Data Access Object pattern with a sample entity service and a materialized view for Apache Cassandra:

    package com.datastax.training;

    import com.datastax.driver.core.*;
    import java.util.UUID;

    public class PlaylistDAO extends CassandraDAO {

    PlaylistDAO(Session session){

    super(session);
    }
    PlaylistDAO(){

    super();

    }

    public void createTable(){

    String tableCQL =…

    A small sample Java application implementing the Data Access Object pattern with a sample entity service and a materialized view for Apache Cassandra:

    package com.datastax.training;

    import com.datastax.driver.core.*;
    import java.util.UUID;

    public class PlaylistDAO extends CassandraDAO {

    PlaylistDAO(Session session){

    super(session);
    }
    PlaylistDAO(){

    super();

    }

    public void createTable(){

    String tableCQL = "CREATE TABLE audiofile (audioid uuid PRIMARY KEY, artist text, album text, track_title text, " +
    "genre text, language text, track_length int, track_num int, year int, rating int, cover_art blob, audio_actual blob);";

    Query cqlQuery = new SimpleStatement(tableCQL);

    session.execute(tableCQL);

    }
    public void createMaterializedView(){

    String tableCQL = "CREATE TABLE audioByArtist (audioid uuid, artist text, album text, track_title text, " +
    "genre text, language text, track_length int, track_num int, year int, rating int, PRIMARY KEY(artist, audioid));";

    Query cqlQuery = new SimpleStatement(tableCQL);

    session.execute(tableCQL);
    }

    See project

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