Working with event rules in the database

Provides examples of using the Java™ API to work with event rules in the database.

The following examples indicate how you use the classes to work with event rules in the database:

Example 6: Adding an event rule to the database

Follow these steps:

Define the event rule:

String eventRuleName = "SampleEventRule";
String eventRuleDescription = 
   "Define Event Rule; test MessageLoggerPlugIn and TWSObjectsMonitorPlugIn";
Date today = new Date(System.currentTimeMillis());
Date tomorrow = new Date(System.currentTimeMillis() + 86400000L);

//EventRule definition

EventRule er = new EventRule();
er.setName(eventRuleName);
er.setDescription(eventRuleDescription);
er.setRuleType(EventRuleType.FILTER);
er.setDraft(false);
er.setValidFrom(today);
er.setValidTo(tomorrow);

Define the event condition. In this case the condition is a job submission:

EventCondition evCond = new EventCondition();
evCond.setPluginName(TWSObjectsMonitorPlugIn.PLUGIN_NAME);
evCond.setEventType(JobUtil.EVENT_JOB_SUBMIT);

Define the conditions that the event condition has to satisfy to trigger the rule action (the filtering predicate):

String filterPred =	  "<attributeFilter name=\"JobStreamWorkstation\" 
                                          operator=\"eq\">"
                                          + "<value>MYWS</value>"
                                          + "</attributeFilter>"

+ "<attributeFilter name=\"JobStreamName\" operator=\"eq\">"
+ "<value>JS1</value>"
				+ "</attributeFilter>"

+ "<attributeFilter name=\"JobName\" operator=\"eq\">"
+ "<value>JOB1</value>"
+ "</attributeFilter>"                        

+ "<attributeFilter name=\"Workstation\" operator=\"eq\">" 
+ "<value>MYHOST</value>"
+ "</attributeFilter>" 

+ "<attributeFilter name=\"Priority\" operator=\"range\">" 
+ "<value>10</value>" 
+ "<value>30</value>" 
+ "</attributeFilter>"

+ "<attributeFilter name=\"Monitored\" operator=\"eq\">" 
+ "<value>TRUE</value>" 
+ "</attributeFilter>"

+ "<attributeFilter name=\"EstimatedDuration\" operator=\"ge\">" 
	+ "<value>400</value>" 
	+ "</attributeFilter>"

+ "<attributeFilter name=\"Login\" operator=\"eq\">" 
+ "<value>TWSUser</value>" 
+ "</attributeFilter>"

+ "<attributeFilter name=\"EveryFrequency\" operator=\"ge\">" 
+ "<value>400</value>" 
+ "</attributeFilter>";

Complete the event condition:

evCond.setFilteringPredicate(filterPred);

Add the event condition to the event rule:
```
er.getTriggerEvents().add(evCond);
```

Define the rule action. In this example, the rule action logs a message in the database:

RuleAction action = new RuleAction();
action.setPluginName(MessageLoggerPlugIn.PLUGIN_NAME);
action.setActionType(MessageLoggerPlugInConstants.ACTION_TYPE_MESSAGE_LOG);
action.setDescription("Adding the Message logger Plugin");
action.setResponseType(RuleResponseType.ON_DETECTION);

Define the value for the rule action parameter:

Map parameterMap = new HashMap();
parameterMap.put(MessageLoggerPlugInConstants.MESSAGE, "message");
parameterMap.put(MessageLoggerPlugInConstants.OBJECT_KEY, "object key");

Complete the rule action:

action.getParameterMap().putAll(parameterMap);

Add the rule action to the event rule:
```
er.getActions().add(action);
```

Add the event rule to the ConnModel interface:

ConnModel myModel = null;
//Get an instance of ConnModel interface...
//...

//Add the object

Identifier erId = null;
try 
{ 
	erId = myModel.addTWSObject(er, null);
}
catch (ConnException e) 
{
	//Do something to recover...
}

Example 7: Retrieve an event rule from the database by ID

Follow these steps:

Obtain the event rule ID to be retrieved by any means appropriate to your interface

Retrieve the event rule:

EventRule eRuleRead = new EventRule();
try 
{
	eRuleRead = 
      (EventRule) myModel.getTWSObject(EventRule.class, erId, false, null);
}
catch (ConnException e) 
{
	//Do something to recover...
}

Example 8: Retrieve an event rule from the database by key (name)

Follow these steps:

Obtain the event rule key (name) to be retrieved by any means appropriate to your interface

Retrieve the event rule:

EventRule eRuleRead = new EventRule();
try 
{
	eRuleRead = 
	   (EventRule) myModel.getTWSObject(EventRule.class, 
                                new EventRuleKey(eventRuleName), false, null);
}
catch (ConnException e) 
{
	//Do something to recover...
}

Example 9: Delete an event rule from the database by ID

Follow these steps:

Retrieve by ID the event rule to be deleted, as shown in example 7.1

If the event rule has been successfully retrieved, delete it:

{
	myModel.removeTWSObject(EventRule.class, eRuleRead.getId(), null);
}
catch (ConnException exc)
{
	//Do something to recover...
}

Example 10: Delete an event rule from the database by key (name)

Follow these steps:

Retrieve by key, the event rule to be deleted, as shown in example 7.2

If the event rule has been successfully retrieved, delete it:

{
	myModel.removeTWSObject(EventRule.class, 
                                      new EventRuleKey(eventRuleName), null);
}
catch (ConnException exc)
{
	//Do something to recover...
}