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git-svn-id: https://svn.coded.pt/svn/SIPRP@504 bb69d46d-e84e-40c8-a05a-06db0d633741

trunk/WEB-INF/classes/siprp/pagina/NewsServlet.java

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+/*
+ * NewsServlet.java
+ *
+ * Created on 20 de Maio de 2005, 17:48
+ */
+
+package siprp.pagina;
+
+import java.io.*;
+import java.util.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import java.sql.*;
+import org.apache.velocity.*;
+import org.apache.velocity.app.*;
+
+import com.evolute.utils.arrays.*;
+import com.evolute.utils.db.*;
+import com.evolute.utils.sql.*;
+
+/**
+ *
+ * @author  lflores
+ */
+public class NewsServlet extends HttpServlet
+	implements GlobalConstants
+{
+	private static DBManager DBM = null;
+
+	private static final Select SELECT = new Select( new String[]{ "not_noticias" }, 
+			new String[]{"data", "noticia"}, new Field( "id" ).in( 
+					new Field( "( SELECT MAX( id ) FROM not_noticias )" ) ) );
+	
+	private SQLExecuter executer = null;
+			
+	public void init()
+	{
+		if( DBM != null )
+		{
+			return;
+		}
+		try
+		{
+			DBM = new JDBCManager( bdUrl + "?prepareThreshold=1", 
+					bdUsername, bdPassword , 10, 8, 8, new SQLQuery[] {} );
+		}
+		catch( Exception e )
+		{
+			e.printStackTrace();
+		}
+	}
+	
+	private void close()
+	{
+		try
+		{
+			DBM.close();
+			DBM = null;
+		}
+		catch( Exception ex )
+		{
+			// we come here after an error
+			// so we discard this exception
+		}
+	}
+	
+	private String getNews()
+	{
+System.err.println( "NEWS: BEGIN" );
+		try
+		{
+			if( executer == null )
+			{
+				executer = ( SQLExecuter )DBM.getSharedExecuter();
+			}
+			Virtual2DArray array = executer.executeQuery( SELECT );
+			Object o[][] = array.getObjects();
+			if( o != null && o.length > 0 )
+			{
+System.err.println( "NEWS: " + o[ 0 ][ 0 ].toString() );
+				return o[ 0 ][ 0 ].toString() + " - " + o[ 0 ][ 1 ].toString();
+			}
+		}
+		catch( Exception ex )
+		{
+System.err.println( "NEWS: EX" );
+			ex.printStackTrace();
+			close();
+		}
+System.err.println( "NEWS: END" );
+		return null;
+	}
+	
+	public void doGet( HttpServletRequest req, HttpServletResponse res )
+		throws IOException
+	{
+System.err.println( "NEWS: GET BEGIN" );
+		init();
+System.err.println( "NEWS: AF INIT" );
+		ServletOutputStream out = res.getOutputStream();
+//		String queryString = req.getQueryString();
+		res.setContentType( "text/html" );
+		String news = getNews();
+		Hashtable parameters = new Hashtable();
+		if( news == null )
+		{
+			parameters.put( "noticias", "SIPRP" );
+		}
+		else
+		{
+			parameters.put( "noticias", news );
+		}
+System.err.println( "NEWS: BF SHOW" );
+		out.println( showPage( "noticias/mostrar_noticias.html", parameters ) );
+	}
+	
+	private String showPage( String page, Hashtable parameters )
+	{
+		VelocityContext context = new VelocityContext();
+		StringWriter output = new StringWriter();
+
+		try
+		{
+			if( parameters != null )
+			{
+				String key;
+				for( Enumeration e = parameters.keys(); e.hasMoreElements(); )
+				{
+					key = ( String ) e.nextElement();
+					context.put( key, parameters.get( key ) );
+				}
+			}
+
+			Velocity.mergeTemplate( page, Velocity.ENCODING_DEFAULT, context, output );
+
+			return output.toString();
+		}
+		catch( Exception e )
+		{
+			e.printStackTrace();
+		}
+		return null;
+	}
+}