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Ciao，我已經通過多種方式進行了測試，但是我仍然無法測試和驗證Drools Fusion中的事件過期機制，所以我正在尋找一些小指導？Drools Fusion CEP中的測試事件過期Ciao
我已經閱讀手冊，我對此功能感興趣：
換言之，一個事件被插入到工作內存，可以使發動機以找出當事件不能再匹配其他事實並自動收回它，釋放其相關資源。
我使用Drools的IDE Eclipse中，5.4.0.Final和我修改的「新的Drools項目」嚮導創建測試和驗證的事件到期模板代碼。
下面的代碼。我的理解，使「生命週期」，以正確的工作方式是：
- 你必須設置的KBase流模式 - 檢查
- 必須插入按照時間順序的活動 - 檢查
- 你必須定義事件之間的時間限制 - 檢查我的情況是最後一條消息（）
但是，當我在最後檢查EventFactHandle時，沒有任何Event（）已過期。 感謝您的幫助。
的Java：
public class DroolsTest {
public static final void main(String[] args) {
try {
KnowledgeBase kbase = readKnowledgeBase();
// I do want the pseudo clock
KnowledgeSessionConfiguration conf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
conf.setOption(ClockTypeOption.get("pseudo"));
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(conf, null);
SessionPseudoClock clock = ksession.getSessionClock();
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");
// Insert of 2 Event:
Message message = new Message();
message.setMessage("Message 1");
message.setStatus(Message.HELLO);
ksession.insert(message);
ksession.fireAllRules();
clock.advanceTime(1, TimeUnit.DAYS);
Message message2 = new Message();
message2.setMessage("Message 2");
message2.setStatus(Message.HELLO);
ksession.insert(message2);
ksession.fireAllRules();
clock.advanceTime(1, TimeUnit.DAYS);
ksession.fireAllRules();
// Now I do check what I have in the working memory and if EventFactHandle if it's expired or not:
for (FactHandle f : ksession.getFactHandles()) {
if (f instanceof EventFactHandle) {
System.out.println(((EventFactHandle)f)+" "+((EventFactHandle)f).isExpired());
} else {
System.out.println("not an Event: "+f);
}
}
logger.close();
} catch (Throwable t) {
t.printStackTrace();
}
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("Sample.drl"), ResourceType.DRL);
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if (errors.size() > 0) {
for (KnowledgeBuilderError error: errors) {
System.err.println(error);
}
throw new IllegalArgumentException("Could not parse knowledge.");
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
// following 2 lines is the template code modified for STREAM configuration
KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
config.setOption(EventProcessingOption.STREAM);
return kbase;
}
/*
* This is OK from template, as from the doc:
* By default, the timestamp for a given event is read from the Session Clock and assigned to the event at the time the event is inserted into the working memory.
*/
public static class Message {
public static final int HELLO = 0;
public static final int GOODBYE = 1;
private String message;
private int status;
public String getMessage() {
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
public int getStatus() {
return this.status;
}
public void setStatus(int status) {
this.status = status;
}
}
}
的Drools：
package com.sample
import com.sample.DroolsTest.Message;
declare Message
@role(event)
end
declare window LastMessageWindow
Message() over window:length(1)
end
rule "Hello World"
when
accumulate($m : Message(status==Message.HELLO) from window LastMessageWindow,
$messages : collectList($m))
then
System.out.println(((Message)$messages.get(0)).getMessage());
end
請注意：即使我添加1秒到消息事件到期後，
@expires(1s)
我還是不得到預期的結果，即插入第一個Message事件，我預料現在已過期？謝謝你的幫助。