How to share objects among java handlers?

Hi, 
 
I have problem with conversion events from javascript to java handlers. 
 
When I wanted to share an object in javascript among events I made global variable. But how to share objects among java handlers? 
 
For example scripted data source and dataset. 
In javascript I put code into "open" of scripted data source event - I opened connection and send results to BufferReader global object. Then in scripted data set event "fetch" I read the global variable of BufferReader object. And as last for scr. datasource "close" event I closed BufferReader object and close connection. 
 
open event in scripted data source 
<pre class='_prettyXprint _lang-auto _linenums:0'>
var myUrl= new Packages.java.net.URL("http://blabla.com/blabla");
[b]// global variable of js for closing in 'close'[/b]
is = myUurl.openStream();
[b]// global variable of js for reading in 'fetch'[/b]
reader = new Packages.java.io.BufferedReader( new Packages.java.io.InputStreamReader( is, "UTF-8" ));
</pre>
 
fetch event in scripted data set 
<pre class='_prettyXprint _lang-auto _linenums:0'>
[b]//reader is ready for reading

[/b]
while ((scriptRow = reader.readLine()) != null) {
var rowData = scriptRow.split(",");
dataSetRow["row1"]= rowData[1];
return true;
}
return false;
</pre>
 
But in java? I have no assigment methods. Or am I blind? Maybe there is another mechanism of working with shared object... 
 
 
thanks for help 
Jan

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Comments

johnw

Just use a local variable in your Event Handler class. It should still be available until the object is destroyed, usually after the close event is called.

You can also use reportContext.setGlobalVariable/getGlobalVariable since the reportContext is passed in the Event Handlers.

John

dzish

<blockquote class='ipsBlockquote' data-author="'johnw'" data-cid="70262" data-time="1289572832" data-date="12 November 2010 - 07:40 AM">
Just use a local variable in your Event Handler class. It should still be available until the object is destroyed, usually after the close event is called. 
 
You can also use reportContext.setGlobalVariable/getGlobalVariable since the reportContext is passed in the Event Handlers. 
 
John </blockquote>
thank you John for reply. 
You are right with local variable I can use it inside my EventAdapter. But how can I obtain report context in code below? 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
public class MyScriptedDataSourceEventAdapter extends ScriptedDataSourceEventAdapter {

public void open(IDataSourceInstance dataSource){

//how to get reportContext?
reportContext.setGlobalVariable("sfd","sd");
}
</pre>
 
Jan

johnw

Sorry for the delay, I was onsite with a client and couldn't check forums. 
 
I didn't get a chance to test this since I don't have the 2.6.1 runtime loaded, but this should work. Give it a try. 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
public class DataSourceAdapter extends ScriptedDataSourceEventAdapter {

IReportContext context;

@Override
public void open(IDataSourceInstance dataSource) throws ScriptException {
Object something = this.context.getGlobalVariable("MyGlobalVariable");

super.open(dataSource);
}

@Override
public void beforeOpen(IDataSourceInstance dataSource,
IReportContext reportContext) throws ScriptException {

this.context = reportContext;

super.beforeOpen(dataSource, reportContext);
}

}

</pre>

dzish

It works. Thank you.