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Home » Eclipse Projects » BIRT » Best practice for setting and getting global variables
Best practice for setting and getting global variables [message #652565] Fri, 04 February 2011 09:41 Go to next message
Mike Wulkan is currently offline Mike Wulkan
Messages: 141
Registered: July 2009
Senior Member
I have some variables/constants that I'd like to define globally for reference throughout my report.

Eg., KBDivisor=1024

I tried:
reportContext.setPersistentGlobalVariable("KDivisor", "1024");
in the initialize method of the report.

But when I try to access this value in say an aggregation expression in a table:
dataSetRow["maxMemory"]/parseInt(reportContext.getPersistentGlobalVariable( "KBDivisor"));
I don't get any value back.

What is the trick I am missing here and is there a better best practice way to achieve what I am attempting.
Re: Best practice for setting and getting global variables [message #652566 is a reply to message #652565] Fri, 04 February 2011 09:57 Go to previous messageGo to next message
Jason Weathersby is currently offline Jason Weathersby
Messages: 9167
Registered: July 2009
Senior Member

Mike,

Are you doing this on the dataset or in an aggregation element in the
report?

Jason

On 2/4/2011 9:41 AM, Mike Wulkan wrote:
> I have some variables/constants that I'd like to define globally for
> reference throughout my report.
>
> Eg., KBDivisor=1024
>
> I tried:
> reportContext.setPersistentGlobalVariable("KDivisor", "1024"); in the
> initialize method of the report.
>
> But when I try to access this value in say an aggregation expression in
> a table:
> dataSetRow["maxMemory"]/parseInt(reportContext.getPersistentGlobalVariable(
> "KBDivisor"));
> I don't get any value back.
>
> What is the trick I am missing here and is there a better best practice
> way to achieve what I am attempting.
Re: Best practice for setting and getting global variables [message #652574 is a reply to message #652566] Fri, 04 February 2011 10:25 Go to previous messageGo to next message
Mike Wulkan is currently offline Mike Wulkan
Messages: 141
Registered: July 2009
Senior Member
In an aggregation element.
Re: Best practice for setting and getting global variables [message #652582 is a reply to message #652574] Fri, 04 February 2011 10:29 Go to previous messageGo to next message
Jason Weathersby is currently offline Jason Weathersby
Messages: 9167
Registered: July 2009
Senior Member

In that case what you have should work fine.

Try the attached report.

Jason

<?xml version="1.0" encoding="UTF-8"?>
<report xmlns="http://www.eclipse.org/birt/2005/design" version="3.2.22"
id="1">
<property name="createdBy">Eclipse BIRT Designer Version
2.6.1.v20100902 Build &lt;2.6.1.v20100915-1750></property>
<property name="units">in</property>
<method
name="initialize"><![CDATA[reportContext.setPersistentGlobalVariable( "testgbl",
"2");]]></method>
<property name="iconFile">/templates/blank_report.gif</property>
<property name="bidiLayoutOrientation">ltr</property>
<property name="imageDPI">96</property>
<data-sources>
<oda-data-source
extensionID="org.eclipse.birt.report.data.oda.jdbc" name="Data Source"
id="7">
<list-property name="privateDriverProperties">
<ex-property>
<name>contentBidiFormatStr</name>
<value>ILYNN</value>
</ex-property>
<ex-property>
<name>metadataBidiFormatStr</name>
<value>ILYNN</value>
</ex-property>
</list-property>
<property
name="odaDriverClass">org.eclipse.birt.report.data.oda.sampledb.Driver </property>
<property name="odaURL">jdbc:classicmodels:sampledb</property>
<property name="odaUser">ClassicModels</property>
</oda-data-source>
</data-sources>
<data-sets>
<oda-data-set
extensionID="org.eclipse.birt.report.data.oda.jdbc.JdbcSelectDataSet "
name="Data Set" id="8">
<list-property name="columnHints">
<structure>
<property name="columnName">ORDERNUMBER</property>
<text-property
name="displayName">ORDERNUMBER</text-property>
<text-property
name="heading">ORDERNUMBER</text-property>
</structure>
<structure>
<property name="columnName">PRODUCTCODE</property>
<text-property
name="displayName">PRODUCTCODE</text-property>
<text-property
name="heading">PRODUCTCODE</text-property>
</structure>
<structure>
<property name="columnName">QUANTITYORDERED</property>
<text-property
name="displayName">QUANTITYORDERED</text-property>
<text-property
name="heading">QUANTITYORDERED</text-property>
</structure>
<structure>
<property name="columnName">PRICEEACH</property>
<text-property
name="displayName">PRICEEACH</text-property>
<text-property name="heading">PRICEEACH</text-property>
</structure>
<structure>
<property name="columnName">ORDERLINENUMBER</property>
<text-property
name="displayName">ORDERLINENUMBER</text-property>
<text-property
name="heading">ORDERLINENUMBER</text-property>
</structure>
</list-property>
<structure name="cachedMetaData">
<list-property name="resultSet">
<structure>
<property name="position">1</property>
<property name="name">ORDERNUMBER</property>
<property name="dataType">integer</property>
</structure>
<structure>
<property name="position">2</property>
<property name="name">PRODUCTCODE</property>
<property name="dataType">string</property>
</structure>
<structure>
<property name="position">3</property>
<property name="name">QUANTITYORDERED</property>
<property name="dataType">integer</property>
</structure>
<structure>
<property name="position">4</property>
<property name="name">PRICEEACH</property>
<property name="dataType">float</property>
</structure>
<structure>
<property name="position">5</property>
<property name="name">ORDERLINENUMBER</property>
<property name="dataType">integer</property>
</structure>
</list-property>
</structure>
<property name="dataSource">Data Source</property>
<list-property name="resultSet">
<structure>
<property name="position">1</property>
<property name="name">ORDERNUMBER</property>
<property name="nativeName">ORDERNUMBER</property>
<property name="dataType">integer</property>
<property name="nativeDataType">4</property>
</structure>
<structure>
<property name="position">2</property>
<property name="name">PRODUCTCODE</property>
<property name="nativeName">PRODUCTCODE</property>
<property name="dataType">string</property>
<property name="nativeDataType">12</property>
</structure>
<structure>
<property name="position">3</property>
<property name="name">QUANTITYORDERED</property>
<property name="nativeName">QUANTITYORDERED</property>
<property name="dataType">integer</property>
<property name="nativeDataType">4</property>
</structure>
<structure>
<property name="position">4</property>
<property name="name">PRICEEACH</property>
<property name="nativeName">PRICEEACH</property>
<property name="dataType">float</property>
<property name="nativeDataType">8</property>
</structure>
<structure>
<property name="position">5</property>
<property name="name">ORDERLINENUMBER</property>
<property name="nativeName">ORDERLINENUMBER</property>
<property name="dataType">integer</property>
<property name="nativeDataType">5</property>
</structure>
</list-property>
<xml-property name="queryText"><![CDATA[select *
from orderdetails
where ordernumber = 10101]]></xml-property>
<xml-property name="designerValues"><![CDATA[<?xml
version="1.0" encoding="UTF-8"?>
<model:DesignValues
xmlns:design="http://www.eclipse.org/datatools/connectivity/oda/design"
xmlns:model="http://www.eclipse.org/birt/report/model/adapter/odaModel">
<Version>1.0</Version>
<design:ResultSets derivedMetaData="true">
<design:resultSetDefinitions>
<design:resultSetColumns>
<design:resultColumnDefinitions>
<design:attributes>
<design:name>ORDERNUMBER</design:name>
<design:position>1</design:position>
<design:nativeDataTypeCode>4</design:nativeDataTypeCode>
<design:precision>10</design:precision>
<design:scale>0</design:scale>
<design:nullability>Nullable</design:nullability>
<design:uiHints>
<design:displayName>ORDERNUMBER</design:displayName>
</design:uiHints>
</design:attributes>
<design:usageHints>
<design:label>ORDERNUMBER</design:label>
<design:formattingHints>
<design:displaySize>11</design:displaySize>
</design:formattingHints>
</design:usageHints>
</design:resultColumnDefinitions>
<design:resultColumnDefinitions>
<design:attributes>
<design:name>PRODUCTCODE</design:name>
<design:position>2</design:position>
<design:nativeDataTypeCode>12</design:nativeDataTypeCode>
<design:precision>15</design:precision>
<design:scale>0</design:scale>
<design:nullability>Nullable</design:nullability>
<design:uiHints>
<design:displayName>PRODUCTCODE</design:displayName>
</design:uiHints>
</design:attributes>
<design:usageHints>
<design:label>PRODUCTCODE</design:label>
<design:formattingHints>
<design:displaySize>15</design:displaySize>
</design:formattingHints>
</design:usageHints>
</design:resultColumnDefinitions>
<design:resultColumnDefinitions>
<design:attributes>
<design:name>QUANTITYORDERED</design:name>
<design:position>3</design:position>
<design:nativeDataTypeCode>4</design:nativeDataTypeCode>
<design:precision>10</design:precision>
<design:scale>0</design:scale>
<design:nullability>Nullable</design:nullability>
<design:uiHints>
<design:displayName>QUANTITYORDERED</design:displayName>
</design:uiHints>
</design:attributes>
<design:usageHints>
<design:label>QUANTITYORDERED</design:label>
<design:formattingHints>
<design:displaySize>11</design:displaySize>
</design:formattingHints>
</design:usageHints>
</design:resultColumnDefinitions>
<design:resultColumnDefinitions>
<design:attributes>
<design:name>PRICEEACH</design:name>
<design:position>4</design:position>
<design:nativeDataTypeCode>8</design:nativeDataTypeCode>
<design:precision>15</design:precision>
<design:scale>0</design:scale>
<design:nullability>Nullable</design:nullability>
<design:uiHints>
<design:displayName>PRICEEACH</design:displayName>
</design:uiHints>
</design:attributes>
<design:usageHints>
<design:label>PRICEEACH</design:label>
<design:formattingHints>
<design:displaySize>22</design:displaySize>
</design:formattingHints>
</design:usageHints>
</design:resultColumnDefinitions>
<design:resultColumnDefinitions>
<design:attributes>
<design:name>ORDERLINENUMBER</design:name>
<design:position>5</design:position>
<design:nativeDataTypeCode>5</design:nativeDataTypeCode>
<design:precision>5</design:precision>
<design:scale>0</design:scale>
<design:nullability>Nullable</design:nullability>
<design:uiHints>
<design:displayName>ORDERLINENUMBER</design:displayName>
</design:uiHints>
</design:attributes>
<design:usageHints>
<design:label>ORDERLINENUMBER</design:label>
<design:formattingHints>
<design:displaySize>6</design:displaySize>
</design:formattingHints>
</design:usageHints>
</design:resultColumnDefinitions>
</design:resultSetColumns>
<design:criteria/>
</design:resultSetDefinitions>
</design:ResultSets>
</model:DesignValues>]]></xml-property>
</oda-data-set>
</data-sets>
<styles>
<style name="report" id="4">
<property name="fontFamily">sans-serif</property>
<property name="fontSize">10pt</property>
</style>
<style name="crosstab-cell" id="5">
<property name="borderBottomColor">#CCCCCC</property>
<property name="borderBottomStyle">solid</property>
<property name="borderBottomWidth">1pt</property>
<property name="borderLeftColor">#CCCCCC</property>
<property name="borderLeftStyle">solid</property>
<property name="borderLeftWidth">1pt</property>
<property name="borderRightColor">#CCCCCC</property>
<property name="borderRightStyle">solid</property>
<property name="borderRightWidth">1pt</property>
<property name="borderTopColor">#CCCCCC</property>
<property name="borderTopStyle">solid</property>
<property name="borderTopWidth">1pt</property>
</style>
<style name="crosstab" id="6">
<property name="borderBottomColor">#CCCCCC</property>
<property name="borderBottomStyle">solid</property>
<property name="borderBottomWidth">1pt</property>
<property name="borderLeftColor">#CCCCCC</property>
<property name="borderLeftStyle">solid</property>
<property name="borderLeftWidth">1pt</property>
<property name="borderRightColor">#CCCCCC</property>
<property name="borderRightStyle">solid</property>
<property name="borderRightWidth">1pt</property>
<property name="borderTopColor">#CCCCCC</property>
<property name="borderTopStyle">solid</property>
<property name="borderTopWidth">1pt</property>
</style>
</styles>
<page-setup>
<simple-master-page name="Simple MasterPage" id="2">
<page-footer>
<text id="3">
<property name="contentType">html</property>
<text-property
name="content"><![CDATA[<value-of>new Date()</value-of>]]></text-property>
</text>
</page-footer>
</simple-master-page>
</page-setup>
<body>
<table id="9">
<property name="dataSet">Data Set</property>
<list-property name="boundDataColumns">
<structure>
<property name="name">ORDERNUMBER</property>
<text-property
name="displayName">ORDERNUMBER</text-property>
<expression name="expression"
type="javascript">dataSetRow["ORDERNUMBER"]</expression >
<property name="dataType">integer</property>
</structure>
<structure>
<property name="name">PRODUCTCODE</property>
<text-property
name="displayName">PRODUCTCODE</text-property>
<expression name="expression"
type="javascript">dataSetRow["PRODUCTCODE"]</expression >
<property name="dataType">string</property>
</structure>
<structure>
<property name="name">QUANTITYORDERED</property>
<text-property
name="displayName">QUANTITYORDERED</text-property>
<expression name="expression"
type="javascript">dataSetRow["QUANTITYORDERED"]</expression >
<property name="dataType">integer</property>
</structure>
<structure>
<property name="name">PRICEEACH</property>
<text-property
name="displayName">PRICEEACH</text-property>
<expression name="expression"
type="javascript">dataSetRow["PRICEEACH"]</expression>
<property name="dataType">float</property>
</structure>
<structure>
<property name="name">ORDERLINENUMBER</property>
<text-property
name="displayName">ORDERLINENUMBER</text-property>
<expression name="expression"
type="javascript">dataSetRow["ORDERLINENUMBER"]</expression >
<property name="dataType">integer</property>
</structure>
<structure>
<property name="name">Aggregation</property>
<property name="dataType">float</property>
<property name="aggregateFunction">SUM</property>
<list-property name="arguments">
<structure>
<property name="name">Expression</property>
<expression name="value"
type="javascript">row["QUANTITYORDERED"]/parseInt(reportContext.getPersistentGlobalVariable( "testgbl"));</expression>
</structure>
</list-property>
</structure>
</list-property>
<column id="38"/>
<column id="39"/>
<column id="40"/>
<column id="41"/>
<column id="42"/>
<header>
<row id="10">
<cell id="11">
<label id="12">
<text-property
name="text">ORDERNUMBER</text-property>
</label>
</cell>
<cell id="13">
<label id="14">
<text-property
name="text">PRODUCTCODE</text-property>
</label>
</cell>
<cell id="15">
<label id="16">
<text-property
name="text">QUANTITYORDERED</text-property>
</label>
</cell>
<cell id="17">
<label id="18">
<text-property
name="text">PRICEEACH</text-property>
</label>
</cell>
<cell id="19">
<label id="20">
<text-property
name="text">ORDERLINENUMBER</text-property>
</label>
</cell>
</row>
</header>
<detail>
<row id="21">
<cell id="22">
<data id="23">
<property name="whiteSpace">nowrap</property>
<property
name="resultSetColumn">ORDERNUMBER</property>
</data>
</cell>
<cell id="24">
<data id="25">
<property name="whiteSpace">nowrap</property>
<property
name="resultSetColumn">PRODUCTCODE</property>
</data>
</cell>
<cell id="26">
<data id="27">
<property name="whiteSpace">nowrap</property>
<property
name="resultSetColumn">QUANTITYORDERED</property>
</data>
</cell>
<cell id="28">
<data id="29">
<property name="whiteSpace">nowrap</property>
<property
name="resultSetColumn">PRICEEACH</property>
</data>
</cell>
<cell id="30">
<data id="31">
<property name="whiteSpace">nowrap</property>
<property
name="resultSetColumn">ORDERLINENUMBER</property>
</data>
</cell>
</row>
</detail>
<footer>
<row id="32">
<cell id="33"/>
<cell id="34"/>
<cell id="35">
<data id="43">
<property
name="resultSetColumn">Aggregation</property>
</data>
</cell>
<cell id="36"/>
<cell id="37"/>
</row>
</footer>
</table>
</body>
</report>


On 2/4/2011 10:25 AM, Mike Wulkan wrote:
> In an aggregation element.
Re: Best practice for setting and getting global variables [message #652593 is a reply to message #652582] Fri, 04 February 2011 11:22 Go to previous messageGo to next message
Mike Wulkan is currently offline Mike Wulkan
Messages: 141
Registered: July 2009
Senior Member
Thanks, that is what I had with one exception. I had some functions defined in the report initialize exit and had placed the setting of the global variable after the functions. When I moved it to before the functions it worked.
Is that expected?
Re: Best practice for setting and getting global variables [message #652644 is a reply to message #652593] Fri, 04 February 2011 14:53 Go to previous message
Jason Weathersby is currently offline Jason Weathersby
Messages: 9167
Registered: July 2009
Senior Member

initialize exit? Can you post in a sample what was failing?

On 2/4/2011 11:22 AM, Mike Wulkan wrote:
> Thanks, that is what I had with one exception. I had some functions
> defined in the report initialize exit and had placed the setting of the
> global variable after the functions. When I moved it to before the
> functions it worked.
> Is that expected?
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