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MONDRIAN: added Embedding Mondrian with olap4j API document
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| <html> | ||
| <!-- | ||
| == $Id$ | ||
| == This software is subject to the terms of the Common Public License | ||
| == Agreement, available at the following URL: | ||
| == http://www.opensource.org/licenses/cpl.html. | ||
| == Copyright (C) 2005-2007 Julian Hyde | ||
| == All Rights Reserved. | ||
| == You must accept the terms of that agreement to use this software. | ||
| --> | ||
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| <head> | ||
| <link rel="stylesheet" type="text/css" href="stylesheet.css"/> | ||
| <title>Pentaho Analysis Services: Embedding Mondrian</title> | ||
| </head> | ||
| <body> | ||
| <!-- doc2web start --> | ||
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| <!-- page title --> | ||
| <div class="contentheading">Embedding Mondrian in a Java Application</div> | ||
| <!-- end page title --> | ||
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| <p>By Will Gorman; last updated January, 2008.</p> | ||
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| <hr noshade size="1"> | ||
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| <p>This document shows a simple example of embedding mondrian in a java application. The steps include downloading Mondrian, installing a database, writing a simple application, compiling the application, and running the application. </p> | ||
| <p>Starting with Mondrian 3.0, we now use the olap4j standard APIs. Please visit <a href="http://www.olap4j.org">http://www.olap4j.org</a> for more documentation.</p> | ||
| <h2>Setting up the Environment<a name="setting_up_the_environment"> </a></h2> | ||
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| <p>First, you need to download mondrian. You can get the latest release | ||
| from SourceForge.</p> | ||
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| <h3>Download the Latest Release<a name="Download_the_latest_source_release"> </a></h3> | ||
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| <p>Download the latest <code>mondrian-<i>version</i>.zip</code> from <a href="http://sourceforge.net/projects/mondrian"> | ||
| SourceForge</a>, and unzip. Now find the <code>mondrian-<i>version</i>-src.zip</code> | ||
| inside this distribution, and unzip it within the mondrian binary distribution under the "src" directory.</p> | ||
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| <h2>Installing the Database<a name="installing_the_database"> </a></h2> | ||
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| <p>Before you run this simple example, you must | ||
| install the standard FoodMart dataset. This is described in the | ||
| <a href="install.html#2_Set_up_test_data">installation guide</a>.</p> | ||
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| <h2>The Source Code<a name="the_source_code"> </a></h2> | ||
| <p>Here is a simple example of embedding mondrian in a java class. A connection is retrieved, and a query is executed. Open the file SimpleEmbeddedExample.java in the main Mondrian directory and paste the contents below.</p> | ||
| <blockquote> | ||
| <code> | ||
| import java.util.*;<br> | ||
| import java.sql.*;<br> | ||
| import org.olap4j.*;<br> | ||
| import org.olap4j.metadata.*;<br> | ||
| <br> | ||
| public class SimpleEmbeddedExample {<br> | ||
| <br> | ||
| public static void main(String args[]) throws Exception {<br> | ||
| <br> | ||
| // First, set up a valid connection string<br> | ||
| String connStr = "jdbc:mondrian:" +<br> | ||
| "Catalog=demo/FoodMart.xml;" +<br> | ||
| "JdbcDrivers=com.mysql.jdbc.Driver;" +<br> | ||
| "Jdbc=jdbc:mysql://localhost/foodmart?user=foodmart&password=foodmart";<br> | ||
| <br> | ||
| // Second, set up a valid query string<br> | ||
| String queryStr = "select " +<br> | ||
| "{[Measures].[Unit Sales]} on columns, " +<br> | ||
| "{[Store].[All Stores]} on rows " +<br> | ||
| "from [Sales]";<br> | ||
| <br> | ||
| // Third, retrieve a connection from the DriverManager<br> | ||
| Class.forName("mondrian.olap4j.MondrianOlap4jDriver"); <br> | ||
| Connection jdbcConn = <br> | ||
| DriverManager.getConnection(connStr, new Properties()); <br> | ||
| OlapConnection connection = <br> | ||
| ((OlapWrapper) jdbcConn).unwrap(OlapConnection.class); <br> | ||
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| <br> | ||
| // Fourth, execute the MDX Query<br> | ||
| OlapStatement olapStatement = connection.createStatement();<br> | ||
| CellSet cellSet = olapStatement.executeOlapQuery(queryStr);<br> | ||
| <br> | ||
| // Fifth, display the Axes<br> | ||
| for (CellSetAxis axis : cellSet.getAxes()) { <br> | ||
| System.out.print(axis.getAxisOrdinal() + ": "); <br> | ||
| boolean firstPos = true; <br> | ||
| for (Position position : axis.getPositions()) { <br> | ||
| if (!firstPos) { <br> | ||
| System.out.print(", "); <br> | ||
| } <br> | ||
| System.out.print("{"); <br> | ||
| boolean first = true; <br> | ||
| for (Member member : position.getMembers()) { <br> | ||
| if (!first) { <br> | ||
| System.out.print(", "); <br> | ||
| } <br> | ||
| System.out.print(member.getUniqueName()); <br> | ||
| first = false; <br> | ||
| } <br> | ||
| System.out.print("}"); <br> | ||
| firstPos = false; <br> | ||
| } <br> | ||
| System.out.println(""); <br> | ||
| } <br> | ||
| <br> | ||
| // Finally, display the Cells <br> | ||
| CellSetAxis cols = cellSet.getAxes().get(0); <br> | ||
| CellSetAxis rows = cellSet.getAxes().get(1); <br> | ||
| for (int row = 0; row < rows.getPositions().size(); row++) { <br> | ||
| System.out.println("Row #" + (row + 1) + ":"); <br> | ||
| for (int col = 0; col < cols.getPositions().size(); col++) { <br> | ||
| List<Integer> positions = new ArrayList<Integer>(2); <br> | ||
| positions.add(col); <br> | ||
| positions.add(row); <br> | ||
| Cell cell = cellSet.getCell(positions); <br> | ||
| System.out.println(cell.getFormattedValue()); <br> | ||
| } <br> | ||
| } <br> | ||
| } <br> | ||
| <br> | ||
| } <br> | ||
| <br> | ||
| </code> | ||
| </blockquote> | ||
| <p>Note that you should replace the specific jdbc information with your own JDBC connection properties.</p> | ||
| <h2>Compiling the Example <a name="compiling_the_example"> </a></h2> | ||
| <p>To compile this example via the command line:</p> | ||
| <blockquote> | ||
| <code> | ||
| javac -cp "src/lib/olap4j.jar" SimpleEmbeddedExample.java | ||
| </code> | ||
| </blockquote> | ||
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| <h2>Running the Example <a name="compiling the example"> </a></h2> | ||
| <p>Below is the java command line that will execute the SimpleEmbeddedExample class. Note that you must replace $JDBC_DRIVER_JAR_LOCATION with the correct path to your specific JDBC driver.</p> | ||
| <blockquote> | ||
| <code> | ||
| java -cp ".:src/lib/olap4j.jar:src/lib/log4j-1.2.9.jar:src/lib/commons-dbcp.jar:src/lib/commons-pool.jar:src/lib/commons-collections.jar<br> | ||
| :src/lib/commons-vfs.jar:src/lib/commons-logging.jar:src/lib/commons-math-1.0.jar:src/lib/javacup.jar<br> | ||
| :src/lib/eigenbase-resgen.jar:src/lib/eigenbase-properties.jar:src/lib/eigenbase-xom.jar:lib/mondrian.jar<br> | ||
| :$JDBC_DRIVER_JAR_LOCATION" SimpleEmbeddedExample | ||
| </code> | ||
| </blockquote> | ||
| <p> You should see this output:</p> | ||
| <blockquote> | ||
| <code> | ||
| log4j:WARN No appenders could be found for logger (mondrian.olap.MondrianProperties).<br> | ||
| log4j:WARN Please initialize the log4j system properly.<br> | ||
| COLUMNS: {[Measures].[Unit Sales]}<br> | ||
| ROWS: {[Store].[All Stores]}<br> | ||
| Row #1:<br> | ||
| 266,773<br> | ||
| </code> | ||
| </blockquote> | ||
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| <hr noshade size="1"/> | ||
| <p> | ||
| Author: Will Gorman; last updated April, 2007.<br/> | ||
| Version: $Id$ | ||
| (<a href="http://p4web.eigenbase.org/open/mondrian/doc/embedding_mondrian.html?ac=1">log </a>)<br/> | ||
| Copyright (C) 2005-2007 Julian Hyde | ||
| </p> | ||
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| <br /> | ||
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| <!-- doc2web end --> | ||
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| </body> | ||
| </html> |