私のアプリケーションは複数のリクエストを処理しますが、ナレッジ セッションのルールは単一のスレッドによってのみ実行されます。例: スレッド 1 とスレッド 2 は、2 ミリ秒のギャップでナレッジ セッションに入りますが、スレッド 1 は独自のルールを実行し、スレッド 2 のルールもスレッド 1 によって実行されます。 1 スレッドのみで実行されますか?
DROOLS でこれを防ぎ、ルールが複数のスレッドによって確実に実行されるようにする方法はありますか?
以下は、私が試した小さなサンプルテストです。
Java クラス:
import java.math.BigDecimal;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.WorkingMemoryEntryPoint;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class DJ_Test {
public static void main(String[] args) {
try {
System.out.println("In main");
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
final StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
final WorkingMemoryEntryPoint entry =ksession.getWorkingMemoryEntryPoint("RequestStream");
final Object obj_1= new Object();
Thread t1 = new Thread(){
public void run(){System.out.println(Thread.currentThread().getName() + " is running");
entry.insert(obj_1);
ksession.fireAllRules();
System.out.println(Thread.currentThread().getName() + " is terminated");
}
};
final Object obj_2= new Object();
Thread t2 = new Thread(){
public void run(){
try{
Thread.sleep(8000);
}catch(Exception e){
}
System.out.println(Thread.currentThread().getName() + " is running");
entry.insert(obj_2);
ksession.fireAllRules();
System.out.println(Thread.currentThread().getName() + " is terminated");
}
};
t1.start();
t2.start();
} catch (Throwable t) {
t.printStackTrace();
}
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
/* KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("rulesFlow.bpmn"), ResourceType.BPMN2);
kbuilder.add(ResourceFactory.newClassPathResource("KansasSalesTax.drl"), ResourceType.DRL);
kbuilder.add(ResourceFactory.newClassPathResource("MissouriSalesTax.drl"), ResourceType.DRL);
kbuilder.add(ResourceFactory.newClassPathResource("SalesTax.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());
return kbase;*/
ClassPathXmlApplicationContext serviceContext = new ClassPathXmlApplicationContext( "droolsContext.xml" );
return (KnowledgeBase) serviceContext.getBean("kbase1");
}
public static class DJ_Message {
public static final int thread_1 = 1;
public static final int thread_2 = 2;
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;
}
}
}
DRL ファイル
package com.sample
import com.sample.DroolsTest.Message;
//global CepService cepService;
declare Object
@role( event )
end
rule "rule_1"
salience 100
when
$o : Object() from entry-point RequestStream
then
System.out.println( "Rule 1 fired by " + Thread.currentThread().getName() );
Thread.sleep(5000);
end
rule "rule_2"
salience 80
when
$o : Object() from entry-point RequestStream
then
System.out.println( "Rule 2 fired by " + Thread.currentThread().getName() );
Thread.sleep(5000);
end
rule "rule_3"
salience 60
when
$o : Object() from entry-point RequestStream
then
System.out.println( "Rule 3 fired by " + Thread.currentThread().getName() );
//cepService.executingThread1();
end
rule "4"
when
Message( status == Message.GOODBYE, myMessage : message )
then
System.out.println( myMessage );
//cepService.executingThread2();
end