问题
I am using KIE Workbench 6.1.0.Final and my Eclipse project where I am trying to execute rules is also 6.1.0 Runtime enabled.
I like to know how I can execute/load rules created using Drools Guvnor, from my java application. Before posting this question, I have looked at the following similar questions and tried the given approaches but none of them worked for me.
Integrating Drool 6 work bench with Java Application
why does loading Drools 6 KIE JAR into code fail?
Loading Drools/KIE Workbench artifacts directly from the repository
KIE Workbench Integration Responds with 401
I have followed the steps given here click this to create a project and defined the rule. I am able to build and deploy the rules. I have tried the following code to load the projects but all fails with different exception. Pls note that I am able to access the workbench jar from the browser.
Approach 1.
public void load1(){
KieServices kieServices = KieServices.Factory.get();
ReleaseId releaseId = kieServices.newReleaseId( "com.example.rule", "RuleProject", "1.0" );
KieContainer kContainer = kieServices.newKieContainer( releaseId );
KieBaseConfiguration kieBaseConf = kieServices.newKieBaseConfiguration();
kieBaseConf.setOption( EventProcessingOption.STREAM );
KieBase kBase = kContainer.newKieBase(kieBaseConf);
for ( KiePackage a : kBase.getKiePackages()) {
for (Rule r : a.getRules()) {
System.out.println("KiePackage {} Rule {}"+ new Object[]{a.getName()+"-"+ r.getName()});
}
}
}
Exception
java.lang.RuntimeException: Cannot find KieModule: com.example.rule:RuleProject:1.0 at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieContainer(KieServicesImpl.java:99)
Approach 2.
public void load2(){
String url = "http://example.com/drools/maven2/com/example/rule/RuleProject/1.0/RuleProject-1.0.jar";
ReleaseIdImpl releaseId = new ReleaseIdImpl("com.example.rule", "RuleProject", "1.0");
KieServices kieServices = KieServices.Factory.get();
kieServices.getResources().newUrlResource(url);
KieContainer kieContainer = kieServices.newKieContainer(releaseId);
// check every 5 seconds if there is a new version at the URL
KieScanner kieScanner = kieServices.newKieScanner(kieContainer);
kieScanner.start(5000L);
// alternatively:
// kieScanner.scanNow();
Scanner scanner = new Scanner(System.in);
while (true) {
//runRule(kieContainer);
System.out.println("Press enter in order to run the test again....");
scanner.nextLine();
}
}
Exception
java.lang.RuntimeException: Cannot find KieModule: com.example.rule:RuleProject:1.0 at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieContainer(KieServicesImpl.java:99)
Approach 3.
public void load3() throws IOException{
String url = "http://example.com/drools/maven2/com/example/rule/RuleProject/1.0/RuleProject-1.0.jar";
KieServices ks = KieServices.Factory.get();
KieRepository kr = ks.getRepository();
UrlResource urlResource = (UrlResource) ks.getResources()
.newUrlResource(url);
urlResource.setUsername("admin");
urlResource.setPassword("password");
urlResource.setBasicAuthentication("enabled");
InputStream is = urlResource.getInputStream();
KieModule kModule = kr.addKieModule(ks.getResources()
.newInputStreamResource(is));
KieContainer kContainer = ks.newKieContainer(kModule.getReleaseId());
kContainer.newStatelessKieSession();
}
Exception
java.io.IOException: Server returned HTTP response code: 401 for URL: http://example.com/drools/maven2/com/example/rule/RuleProject/1.0/RuleProject-1.0.jar
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at org.drools.core.io.impl.UrlResource.grabStream(UrlResource.java:257)
at org.drools.core.io.impl.UrlResource.getInputStream(UrlResource.java:174)
Here is my workbench jar pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.rule</groupId>
<artifactId>RuleProject</artifactId>
<version>1.0</version>
<packaging>kjar</packaging>
<name>RuleProject</name>
<repositories>
<repository>
<id>guvnor-m2-repo</id>
<name>Guvnor M2 Repo</name>
<url>http://localhost:8080/drools/maven2/</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.kie</groupId>
<artifactId>kie-maven-plugin</artifactId>
<version>6.1.0.Final</version>
<extensions>true</extensions>
</plugin>
</plugins>
</build>
</project>
Here is my java application pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>xcp.drool</groupId>
<artifactId>xcpdrool</artifactId>
<version>1</version>
<repositories>
<repository>
<releases>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
</releases>
<id>guvnor-m2-repo</id>
<name>Guvnor M2 Repo</name>
<url>http://localhost:8080/drools/maven2/</url>
</repository>
<repository>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</pluginRepository>
</pluginRepositories>
<build>
<sourceDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\src\main\java</sourceDirectory>
<scriptSourceDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\src\main\scripts</scriptSourceDirectory>
<testSourceDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\src\test\java</testSourceDirectory>
<outputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\classes</outputDirectory>
<testOutputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\test-classes</testOutputDirectory>
<resources>
<resource>
<directory>C:\p4_xb\xCP-Drool\xCPDrool1\src\main\resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>C:\p4_xb\xCP-Drool\xCPDrool1\src\test\resources</directory>
</testResource>
</testResources>
<directory>C:\p4_xb\xCP-Drool\xCPDrool1\target</directory>
<finalName>xcpdrool-1</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.3</version>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
</plugin>
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.1</version>
</plugin>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<version>2.0</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<id>default-clean</id>
<phase>clean</phase>
<goals>
<goal>clean</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.3.1</version>
<executions>
<execution>
<id>default-install</id>
<phase>install</phase>
<goals>
<goal>install</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<executions>
<execution>
<id>default-resources</id>
<phase>process-resources</phase>
<goals>
<goal>resources</goal>
</goals>
</execution>
<execution>
<id>default-testResources</id>
<phase>process-test-resources</phase>
<goals>
<goal>testResources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.10</version>
<executions>
<execution>
<id>default-test</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<executions>
<execution>
<id>default-testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
<execution>
<id>default-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.2</version>
<executions>
<execution>
<id>default-jar</id>
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.7</version>
<executions>
<execution>
<id>default-deploy</id>
<phase>deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.0</version>
<executions>
<execution>
<id>default-site</id>
<phase>site</phase>
<goals>
<goal>site</goal>
</goals>
<configuration>
<outputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
<execution>
<id>default-deploy</id>
<phase>site-deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
<configuration>
<outputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
</executions>
<configuration>
<outputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<outputDirectory>C:\p4_xb\xCP-Drool\xCPDrool1\target\site</outputDirectory>
</reporting>
<profiles>
<profile>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<repositories>
<repository>
<releases>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
</releases>
<id>guvnor-m2-repo</id>
<name>Guvnor M2 Repo</name>
<url>http://localhost:8080/drools/maven2/</url>
</repository>
</repositories>
</profile>
</profiles>
</project>
回答1:
Change your eclipse runtime to 6.0 0 and keep the workbench to 6.1.0 final. This should work with your approach 3. However you won’t be able to use KieScanner.
回答2:
I had the same issue as yours. Working on the 3rd approach you have mentioned, I was able to get it to work finally.
The problem lies in the UrlResource class which was not able to authenticate properly and hence the issue. I replaced the UrlResource with following code snippet:
String userpassword = "username:password";
String url = "http://localhost:8080/drools/maven2/com/org/project/1.0/project-1.0.jar";
httpURLConnection = (HttpURLConnection)new URL(url).openConnection();
String authEnc = new Base64Encoder().encode(userpassword.getBytes());
httpURLConnection.setRequestProperty("Authorization", "Basic "+ authEnc);
is = httpURLConnection.getInputStream();
KieModule kModule = kr.addKieModule(ks.getResources().newInputStreamResource(is));
and used this kModule to get the kContainer and kSession.
来源：https://stackoverflow.com/questions/27632881/how-to-integrate-kie-workbench-6-1-0-final-drools-guvnor-project-with-java-app