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| /* SettingAttributes.java, see http://ultramessaging.github.io/UMExamples/SettingAttributes/java/ */
import com.latencybusters.lbm.*;
public class SettingAttributes {
public static void main(String[] args) throws LBMException {
LBMContext ctx = null; /* Container for UM instance */
LBMTopic topic1 = null; /* Object used to create topic */
LBMTopic topic2 = null; /* Object used to create topic */
LBMSource src1 = null; /* Used for sending messages on a single topic */
LBMSource src2 = null; /* Used for sending messages on a single topic */
LBMSourceAttributes srcAttr = null; /* Object used to configure sources */
int desPort;
/* We are using certain lbm objects that require an application level */
/* memory manager called the LBMObjectRecycler to cleanup */
LBMObjectRecycler objRec = new LBMObjectRecycler();
/*** Initialization: create necessary UM objects. ***/
try {
/* create ctxAttr to set config values before creating context */
LBMContextAttributes ctxAttr = new LBMContextAttributes();
ctxAttr.setObjectRecycler(objRec, null);
/* Modify resolver address by setting attributes */
ctxAttr.setValue("resolver_multicast_address", "224.10.11.12");
/* Create a context with default attributes */
ctx = new LBMContext(ctxAttr);
/* Create source attributes object, used to configure sources */
srcAttr = new LBMSourceAttributes();
srcAttr.setObjectRecycler(objRec, null);
/* Set configuration value using strings */
srcAttr.setValue("transport", "lbtrm");
/* The Java API only accepts string values. ints, for example */
/* must be converted to strings */
desPort = 14001;
srcAttr.setValue("transport_lbtrm_destination_port", Integer.toString(desPort));
/* Create topic for the first source with configured attributes */
topic1 = new LBMTopic(ctx, "test.topic1", srcAttr);
src1 = new LBMSource(ctx, topic1);
/* Modify Configuration for second topic to use a new port */
desPort = 14002;
srcAttr.setValue("transport_lbtrm_destination_port", Integer.toString(desPort));
/* Create second topic and source using modified configuration values */
topic2 = new LBMTopic(ctx, "test.topic2", srcAttr);
src2 = new LBMSource(ctx, topic2);
}
catch(LBMException ex)
{
System.err.println("Error initializing LBM objects: " + ex.toString());
System.exit(1);
}
/* Cleanup all LBM objects */
try {
objRec.close();
src2.close();
src1.close();
ctx.close();
}
catch(LBMException ex)
{
System.err.println("Error closing LBM objects: " + ex.toString());
System.exit(1);
}
} /* main */
} /* class SettingAttributes */
|