In this screencast I explain the support of multi-lingual content of eXo Platform 3.5. The different features that you can see in this video are:
Like many developers I am using Twitter Boostrap for my Web applications. Using this framework has been very helpful for me, since I am really not a good HTML/CSS developer. For now, on my site Resultri I am using the default look and feel, will customize it later.
Lately, I wanted to integrate Google Map to my application, and when testing it, I had the bad surprise to see that the Controls and WindowInfo are not printed correctly as you can see in the screen shot below:
Last week I was invited to present eXo Cloud IDE during the SAP Cloud Inside. This SAP Community event was a great opportunity to discuss about the cloud with an interesting point of view: the impact of the cloud for SAP customers (especially administrators and developers).
During this presentation I have introduced the eXo Cloud IDE, and I did a demonstration in which O have built and deployed applications : Open Social Gadgets, Ruby on Rails and Java/Spring, and explain how it could be extended to SAP business services.
Here the slides that I have used during this presentation:
Introduction
Many Google
AppEngine developers have been waiting for the Full Text Search feature,
especially coming from Google the biggest search engine on the Web. I
was quite happy to see that Google team is working on it as you can
check in the Google I/O 2011 session : Full Text Search by Bo Majewski, Ged Ellis . As far as I know the very promising indexing service is not yet available.
In
this article I will explain how you can provide some kind of full text
search in your application using services available App Engine services.
In
my specific use case I do not ask for a lot of feature, I just need to
have simple search a string in various attributes of my entities
independently of the case, and possible special characters (such as è,é,
... ). I am far of being an expert of Google Datastore API but I did
not find any simple way to achieve this directly using the Java API.
What I have done to solve this issue is to duplicate a part of my data
into the Google Cloud SQL to use the MySQL fulltext search capabilities.
Prerequisites
To achieve the following tasks you need to :
import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
//...
//...
Entity article = new Entity("Article");
article.setProperty("title", "MySQL Tutorial");
article.setProperty("body", "DBMS stands for DataBase ...");
datastore.put(article);
article = new Entity("Article");
article.setProperty("title", "Datastore Index Selection and Advanced Search");
article.setProperty("body", "Learn how recent improvements to the query planner ... function in your application");
datastore.put(article);
CREATE SCHEMA search_values DEFAULT CHARACTER SET utf8 ; USE search_values; CREATE TABLE articles ( entity_key varchar(250), title text, body text, PRIMARY KEY RESULTS_PK (entity_key), FULLTEXT (title,body) ) ENGINE=MyISAM DEFAULT CHARSET=utf8;Lines 1 and 3 are here to create the database schema and use it; then the script create a table that will contain a copy of the title and body from the entity.
/lib/impl/. You can download the MySQL JDBC driver here. -Drdbms.server=local -Drdbms.driver=com.mysql.jdbc.Driver -Drdbms.url=jdbc:mysql://localhost:3306/search_values?user=username&password=password
lib/impl, and select the JDBC driver JAR file. Click
Open. The driver JAR is listed under User
Entries. Connection conn = null;
try {
DriverManager.registerDriver(new AppEngineDriver());
conn = DriverManager.getConnection("jdbc:google:rdbms://[your db instance]/search_values");
conn.setAutoCommit(false);
String statement = "REPLACE INTO articles (entity_key, title, body) VALUES( ? , ? , ? )";
PreparedStatement stmt = conn.prepareStatement(statement);
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
Query q = new Query("Article");
PreparedQuery pq = datastore.prepare(q);
// loop on each entity and insert the values in the SQL Table
for (Entity result : pq.asIterable()) {
stmt.setString(1, KeyFactory.keyToString(result.getKey()) );
stmt.setString(2, result.getProperty("title").toString() );
stmt.setString(3, result.getProperty("body").toString() );
stmt.executeUpdate();
conn.commit();
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (conn != null)
try {
conn.close();
} catch (SQLException ignore) {}
}
public IterablesearchEntity(String query) { List results = new ArrayList (); Connection conn = null; try { DriverManager.registerDriver(new AppEngineDriver()); conn = DriverManager.getConnection("jdbc:google:rdbms://[your db instance]/search_values"); String statement = "SELECT entity_key FROM articles WHERE MATCH (title,body) AGAINST (? WITH QUERY EXPANSION);"; PreparedStatement stmt = conn.prepareStatement(statement); stmt.setString(1, query); ResultSet rs = stmt.executeQuery(); while (rs.next()) { String keyAsString = rs.getString(1); Entity article = DatastoreServiceFactory.getDatastoreService().get( KeyFactory.stringToKey(keyAsString) ); results.add(article); } } catch (SQLException e) { e.printStackTrace(); } catch (EntityNotFoundException e) { e.printStackTrace(); } finally { if (conn != null) try { conn.close(); } catch (SQLException ignore) {} } return results; }
eXo Platform 3.5 provides many extension points and API for developers, allowing them to create very cool stuff.
I have developed a small extension that allows any user to associate his Twitter account to his eXo Platform account. This extension simply post on your Twitter account when you write a message with a special hashtag (#tw).
This is a very quick development that I have done while waiting for my kids, so I still have things to integrate to provide complete feature, but this is a good example to show how you can extend the platform.
You can view it in action in this video:
Lately I have been traveling a lot, and I was not able to access the internet all the time; but I still want to look at some YouTube video, for example the greate Google I/O Sessions...
My needs are simple :
Introduction
In this article I will explain how you can:
$ mkdir memcachedbuild $ cd memcachebuild
$ curl -O http://www.monkey.org/~provos/libevent-1.4.14-stable.tar.gz $ tar xzvf libevent-1.4.14-stable.tar.gz $ cd libevent-1.4.14-stable $ ./configure $ make $ make verify $ sudo make install
$ curl -O http://memcached.googlecode.com/files/memcached-1.4.10.tar.gz $ tar xzvf memcached-1.4.10.tar.gz $ cd memcached-1.4.10 $ ./configure $ make $ make test $ sudo make installYou are now ready to use memcached that is available at /usr/local/bin/memcached
$ /usr/local/bin/memcached -d -p 11211
$ telnet 127.0.0.1 11211 Trying 127.0.0.1... Connected to tgrall-server. Escape character is '^]'. set KEY 0 600 16 This is my value STORED get KEY VALUE KEY 0 16 This is my value END
set <key> <flags> <expiration_time> <number_of_bytes> [noreply] \n\n <value>
<repository>
<id>spy</id>
<name>Spy Repository</name>
<layout>default</layout>
<url>http://files.couchbase.com/maven2/</url>
</repository>
<dependency>
<groupid>spy</groupid>
<artifactid>spymemcached</artifactid>
<version>2.7.3</version>
</dependency>
package com.grallandco.blog;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Console;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.spy.memcached.AddrUtil;
import net.spy.memcached.MemcachedClient;
public class Test {
public static void main(String[] args) {
try {
System.out.print("Enter the new key : ");
BufferedReader reader = new BufferedReader( new InputStreamReader(System.in));
String key = null;
key = reader.readLine();
System.out.print("Enter the new value : ");
String value = null;
value = reader.readLine();
MemcachedClient cache = new MemcachedClient(AddrUtil.getAddresses("127.0.0.1:11211"));
// read the object from memory
System.out.println("Get Object before set :"+ cache.get(key) );
// set a new object
cache.set(key, 0, value );
System.out.println("Get Object after set :"+ cache.get(key) );
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
System.exit(0);
}
System.exit(0);
}
}
Enter the new key : CITY
Enter the new value : Paris, France
2011-11-16 15:22:09.928 INFO net.spy.memcached.MemcachedConnection: Added {QA sa=/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2011-11-16 15:22:09.932 INFO net.spy.memcached.MemcachedConnection: Connection state changed for sun.nio.ch.SelectionKeyImpl@5b40c281
Get Object before set :null
Get Object after set :Paris, France
get CITY VALUE CITY 0 13 Paris, France END
