How to read server configuration from an embedded operator
Article ID: KB0075731
Updated On:
| Products | Versions |
|---|---|
| TIBCO Streaming | - |
Description
How To: Reading server configuration from an embedded operator
Resolution
Get the container and operator name through the Operator API.
Many of the configuration settings are stored as Java system properties.
For more info on StreamBase Java Properties, see:
http://docs.streambase.com/latest/index.jsp?topic=/com.streambase.sb.ide.help/data/html/reference/javaproperties.html
To see this demonstrated create this test function (using the Java Function Wizard):
Call it from a Map operator as so:
When this application is executed, the function output should look something like:
A custom operator can call System.getProperty(String prop) to obtain this and other StreamBase configuration settings at runtime from within the application.
Note: If the Port is not explicitly specified in the sbd.sbconf using
then the ":<portnum>" will be blank in the streambase.uri java property. In this case assume the default value of "10000".
Many of the configuration settings are stored as Java system properties.
For more info on StreamBase Java Properties, see:
http://docs.streambase.com/latest/index.jsp?topic=/com.streambase.sb.ide.help/data/html/reference/javaproperties.html
Example:
To see this demonstrated create this test function (using the Java Function Wizard):
package com.sb.support;
public class SBInfo {
public static String SBuri() {
return System.getProperty("streambase.uri");
}
}
public class SBInfo {
public static String SBuri() {
return System.getProperty("streambase.uri");
}
}
Call it from a Map operator as so:
calljava("com.sb.support.SBInfo","SBuri")
When this application is executed, the function output should look something like:
Time Output Stream Fields
10:13:53 OutputStream1 val=sb://localhost:10050/ Note(2)
10:13:53 OutputStream1 val=sb://localhost:10050/ Note(2)
A custom operator can call System.getProperty(String prop) to obtain this and other StreamBase configuration settings at runtime from within the application.
Note: If the Port is not explicitly specified in the sbd.sbconf using
<server>
<!-- Port to listen on. StreamBase defaults to 10000. -->
<param name="tcp-port" value="10050"/>
</server>
<!-- Port to listen on. StreamBase defaults to 10000. -->
<param name="tcp-port" value="10050"/>
</server>
then the ":<portnum>" will be blank in the streambase.uri java property. In this case assume the default value of "10000".
Issue/Introduction
How to read server configuration from an embedded operator
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