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This part: configuration and development olap4j
Mondrian related packages introduced under maven: here I introduced is the version of mondrain3.14.
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>commons-configuration</groupId>
<artifactId>commons-configuration</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<!--JSON-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.31</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.4.0</version>
</dependency>
<dependency>
<groupId>mondrian</groupId>
<artifactId>mondrian</artifactId>
<version>3.14.0.0-12</version>
</dependency>
<!-- <dependency>
<groupId>org.olap4j</groupId>
<artifactId>olap4j-xmlaserver</artifactId>
<version>1.2.0</version>
</dependency>-->
<dependency>
<groupId>org.olap4j</groupId>
<artifactId>olap4j</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>eigenbase</groupId>
<artifactId>eigenbase-xom</artifactId>
<version>1.3.4</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-vfs2</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>net.hydromatic</groupId>
<artifactId>eigenbase-properties</artifactId>
<version>1.1.5</version>
</dependency>
<dependency>
<groupId>eigenbase</groupId>
<artifactId>eigenbase-resgen</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>apache-log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>commons-math</groupId>
<artifactId>commons-math</artifactId>
<version>1.2</version>
</dependency>
mondrian3.14 jar package version I was under from the Internet, install maven with the following command:
mvn install:install-file -Dfile=.\mondrian.jar -DgroupId=mondrian -DartifactId=mondrian -Dversion=3.14.0.0-12 -Dpackaging=jar
Mondrian and first test a database connection:
package com.muge.as.dao;
import mondrian.olap.Axis;
import mondrian.olap.Position;
import mondrian.olap.Util;
import mondrian.olap.Util.PropertyList;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
/**
* @author xj
*
*/
public class TestMondrian {
// 数据库连接信息，这里用的derby
//private static String dbName = "sample";
//private static String driver = "org.apache.derby.jdbc.EmbeddedDriver";
private static String driver = "oracle.jdbc.driver.OracleDriver";
//private static String url = "jdbc:derby:" + dbName;
private static String url="jdbc:oracle:thin:@127.0.0.1:1521:ORCL";
//private static String urlCreate = url + ";create=true";
/* private static String userName = "sa";
private static String password = "sa";*/
//private static String userName = "superVision";
private static String userName = "fin_report";
private static String password = "1";
//
//private static String sqlFile = "init.sql";
// 立方体定义文件
//private static String xmlFile = "sample.xml";
private static String xmlFile = "olapSchema.xml";
public static void main(String[] args) throws Exception {
Class.forName(driver);
String mdxStr = "select {[年].Members} on columns,{[组织].Members} on rows from 模型一";
// mondrian提供的mdx查询接口
System.out.println("====================mondrian接口=================");
// 建立连接
PropertyList connectInfo = new PropertyList();
connectInfo.put("Provider", "mondrian");
// connectInfo.put("JdbcDrivers", driver);
connectInfo.put("Jdbc", url);
connectInfo.put("JdbcUser", userName);
connectInfo.put("JdbcPassword", password);
// mondrian默认解析xml的方法不带字符集，中文会有乱码，故自行取得CatalogContent
// connectInfo.put("Catalog", xmlFile);
connectInfo.put("CatalogContent", getCatalogContent());
// 执行查询
mondrian.olap.Connection conn = mondrian.olap.DriverManager
.getConnection(connectInfo, null);
mondrian.olap.Query query = conn.parseQuery(mdxStr);
mondrian.olap.Result result = conn.execute(query);
// 输出结果
PrintWriter pw = new PrintWriter(System.out);
result.print(pw);
System.out.println("----------------------------------------------------");
Axis rowAxis = result.getAxes()[0];
int rowNum = rowAxis.getPositions().size();
List<Position> ps=rowAxis.getPositions();
//int colNum = (List<Position>(rowAxis.getPositions())).get(0).size();
System.out.println("colAxis.getPositions().size() rowNum:"+ps.size() );
System.out.println("rowAxis.getPositions().get(0)).size() colNum:"+ps.get(0).size() );
System.out.println("----------------result.getAxes().length:"+result.getAxes().length );
pw.flush();
}
/**
* 初始化数据库，建表
*
* @throws Exception
*/
private static void initDB() throws Exception {/*
if (!new File(dbName).exists()) {
// derby数据库不存在，开始初始化
System.out.println("初始化中...");
Class.forName(driver);
Connection conn = DriverManager.getConnection(urlCreate, userName, password);
ScriptRunner runner = new ScriptRunner(conn);
runner.setSendFullScript(false);
runner.setStopOnError(true);
runner.runScript(new FileReader(sqlFile));
runner.closeConnection();
System.out.println("初始化完毕");
}
*/}
private static String getCatalogContent() throws Exception {
//InputStream inputStream = mondrian.olap.Util.readVirtualFile(xmlFile);
InputStream inputStream =null;
try {
inputStream=mondrian.olap.Util.readVirtualFile(xmlFile);
final byte[] bytes = Util.readFully(inputStream, 1024);
// 下面是mondrian原来的实现，由于byte被强制转化为char，汉字全为乱码，故将这段处理处理掉。
// final char[] chars = new char[bytes.length];
// for (int i = 0; i < chars.length; i++) {
// chars[i] = (char) bytes[i];
// }
String s=new String(bytes, "UTF-8");
return s;
}catch(Exception e){
e.printStackTrace();
return "";
}
finally {
if (inputStream != null) {
inputStream.close();
}
}
}
}
代码中conn.execute(query); 提示是过时方法。官方推荐利用olap4j的实现。olap4j是一个OLAP的API，现在已成了标准，下面就是olap4j的实现方式 // olap4j的mdx接口，是一个jdbc实现，推荐
System.out.println("\r\n===================olap4j接口==================");
// 建立连接
String strUrl = "jdbc:mondrian:";
strUrl += "Jdbc=" + url;
strUrl += ";JdbcUser=" + userName;
strUrl += ";JdbcPassword=" + password;
// strUrl += ";Catalog=" + xmlFile;
strUrl += ";CatalogContent=" + getCatalogContent();
Class.forName("mondrian.olap4j.MondrianOlap4jDriver");
Connection olap4jConn = DriverManager.getConnection(strUrl);
OlapConnection olapConn = (OlapConnection) olap4jConn.unwrap(OlapConnection.class);
// 执行查询
OlapStatement statement = olapConn.createStatement();
CellSet cellSet = statement.executeOlapQuery(mdxStr);
// 输出结果
CellSetFormatter formatter = new RectangularCellSetFormatter(false);
formatter.format(cellSet, new PrintWriter(System.out, true));运行结果：
| | 年 |
| | | 2010年 | 2011年 | 2012年 | 2013年 | 2014年 | 2015年 | 2016年 | 2017年 | 2018年 | 2019年 | 2020年 |
+----+--------+-----------+------------+-------------+-------+-------+-------+-------+-------+-------+-------+-------------+-------+-------+-------+
| 组织 | | | | 79440368.57 | | | | | | | | 79440368.57 | | | |
| | 湖北省财政厅 | | | 79440368.57 | | | | | | | | 79440368.57 | | | |
| | | 十堰市 | | 22248.69 | | | | | | | | 22248.69 | | | |
| | | | 丹江口市 | 1298.05 | | | | | | | | 1298.05 | | | |
| | | | 十堰市本级 | 12898.78 | | | | | | | | 12898.78 | | | |
| | | | 张湾区 | 0. | | | | | | | | 0. | | | |
| | | | 房县 | 737.3 | | | | | | | | 737.3 | | | |
| | | | 武当山特区 | 1009.18 | | | | | | | | 1009.18 | | | |
| | | | 白浪区 | | | | | | | | | | | | |
| | | | 竹山县 | 116. | | | | | | | | 116. | | | |During operation, the error will be reported as follows:
09:28:16.943 [main] DEBUG mondrian.spi.impl.JdbcDialectImpl - NOT Using IMPALA dialect.
java.sql.SQLSyntaxErrorException: ORA-00923: 未找到要求的 FROM 关键字This error seems not ignore it, mondrian is a bug ?, anyway, the old lady did not cover this issue.
Here to learn about olap4j:
● JAVA API
● PROVIDES OLAP ANALISYS
● QUERY LANGUAGE
– MDX STRING
– MDX PARSE TREE
– METADA IS AT THE HEART OF Olap4j
– DIFFERENT CUBE SERVERS ARE SUPPORTED
Support different cube service
● MSAS via XML/A
● MONDRIAN
MAIN CLASSES/INTERFACES：
– OlapConnection
– OlapWrapper
– OlapStatement/ PreparedOlapStatement
– CellSet
– CellSetAxis
– Position
– Cell
cellSet
● Cellset is the set which contains the cell returned by the MDX query.
● Cellset is the set where results are founded.
– Important API methods: getCell, getFilterAxis, getMetadata..
Cell
● Cell is the structure which contains a part of the cellset. Every cell, contains a part of the result we are searching with a MDX query.
● It could be said that cells are as rows in RDBs or documents in a document-oriented DB. This is just a very simple approach, a really simple analogy.
– Important API methods: drillThrough, getValue, isEmpty, isNull,...
CellSetAxis:
CellSetAxis is the axis of a cellset (OK?!!)
● A cell set has the same number of axes as the MDX statement which was executed to produce it.
Generating a set of cells which has the same MDX statement axes.
● Each axis is an ordered collection of members or tuples.
● Each member or tuple on an axis is called Position.
– Important API methods: getPositions, getAxisMetada...
ps: tuples: tuple
Position:
●Position is one of the CellSetAxis objects in a CellSet.
● An axis has a particular dimensionality, that is, a set of one or more dimensions which will appear on than axis, and every position on that axis will have a member of each of those dimensions. (Extracted from official API)
– Important API methods: getMembers, getOrdinal...
The following is a description on the part of the class github:
core part:
- org.olap4j.driver.xmla - Generic XML/A driver.
- org.olap4j.mdx - Core objects of the MDX model.
- org.olap4j.mdx.parser - Parser for the MDX query language.
- org.olap4j.metadata - Discovery of an OLAP server's metadata.
- org.olap4j.type - System for the core MDX object model and the metadata package.
Extension:
- org.olap4j.query - Programmatic Query Model.
- org.olap4j.transform - Core MDX object model transformation utilities.
- org.olap4j.layout - Utility classes to display CellSets.
- org.olap4j.CellSetListener and all associated classes - Event-based system for real time updates of CellSet objects.
- org.olap4j.Scenario and all associated classes - Statistical simulations module.
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