[rules-dev] Problems when using drools-server
Zhang Jing-A52198
j.zhang at motorola.com
Wed Feb 4 18:41:43 EST 2009
Thanks a lot for the help! And it works very well!
As the communication between client and the server is based on an xml
request/response (in certain format), how to pass in objects that
contains other objects? For example, in the sample_request.xml,
"Person", "Result" and "Car" all contains primitive type of fields. What
if one of the fields is of complex type? (e.g., "Car" contains a field
called "time", whose class is java.util.Date). How to pass the time
value to the server? I've tried:
<inFacts>
<anon-fact>
<fact class="something.Car">
<name>saab</name>
<type>wagon</type>
<named-fact>
<id>time</id>
<fact class="java.util.Date">
<fastTime>32875987345</fastTime>
</fact>
</named-fact>
</fact>
</anon-fact>
</inFacts>
But it doesn't work. The server always returns errors like:
com.thoughtworks.xstream.converters.ConversionException: Cannot parse
date
Thanks,
Jing
________________________________
From: rules-dev-bounces at lists.jboss.org
[mailto:rules-dev-bounces at lists.jboss.org] On Behalf Of David Sinclair
Sent: Monday, February 02, 2009 7:51 PM
To: Rules Dev List
Subject: Re: [rules-dev] Problems when using drools-server
The properties file is loaded via the class loader. The DRLs are loaded
relative to working directory of the server, or absolute if that is how
you specify the file.
On Mon, Feb 2, 2009 at 7:04 PM, Zhang Jing-A52198 <j.zhang at motorola.com>
wrote:
Thanks!! It really helps!!! I was using Guvnor M4 with drools-server M5.
Now I'm upgrading everything to M5. And it works!!
One more question, when I try to build/deploy drools-server from source,
where should the drl file be put (e.g., the properties file contains:
file=test_rules1.drl)? I know that the rule agent configurations are to
be placed in the "resources" directory. Should the drl file be put in
the same dir? Or a specific place?
Thanks,
Jing
________________________________
From: rules-dev-bounces at lists.jboss.org
[mailto:rules-dev-bounces at lists.jboss.org] On Behalf Of David Sinclair
Sent: Monday, February 02, 2009 5:30 PM
To: Rules Dev List
Subject: Re: [rules-dev] Problems when using drools-server
Sorry, I should have stated that differently. The version you are
getting from Guvnor, is different than the version the execution server
has. Which version did u compile you packages on guvnor with?
On Mon, Feb 2, 2009 at 6:10 PM, Zhang Jing-A52198 <j.zhang at motorola.com>
wrote:
In addition, I've changed testservice.properties as:
newInstance=true
url=http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package
/something/LATEST
Thanks a lot for your help!!!
Jing
________________________________
From: rules-dev-bounces at lists.jboss.org
[mailto:rules-dev-bounces at lists.jboss.org] On Behalf Of Zhang
Jing-A52198
Sent: Monday, February 02, 2009 4:39 PM
To: Rules Dev List
Subject: RE: [rules-dev] Problems when using drools-server
The client file is as:
import java.io.*;
import java.net.*;
public class DroolsClient {
public static void main(String[] args) {
try {
InputStream inXML =
DroolsClient.class.getResourceAsStream("sample_request.xml");
URL url = new
URL("http://localhost:8080/drools-server/knowledgebase/testservice");
URLConnection conn =
url.openConnection();
conn.setDoOutput(true);
// conn.setRequestProperty(key,
value);
BufferedReader in = new
BufferedReader(new InputStreamReader(inXML));
DataOutputStream outXML = new
DataOutputStream(conn.getOutputStream());
String requestline;
while ((requestline = in.readLine())
!= null) {
System.out.println(requestline);
outXML.writeBytes(requestline);
}
in.close();
outXML.flush();
outXML.close();
BufferedReader response = new
BufferedReader(new InputStreamReader(conn.getInputStream()));
String responseLine;
while ((responseLine =
response.readLine()) != null) {
System.out.println(responseLine);
}
response.close();
} catch (MalformedURLException ex) {
} catch (IOException ex) {
}
}
}
How to make it consistent to the drools-server?
Thanks,
Jing
________________________________
From: rules-dev-bounces at lists.jboss.org
[mailto:rules-dev-bounces at lists.jboss.org] On Behalf Of David Sinclair
Sent: Monday, February 02, 2009 4:26 PM
To: Rules Dev List
Subject: Re: [rules-dev] Problems when using drools-server
Looks like the version of drools on your server is different than your
client. That would explain the class version issue
On Mon, Feb 2, 2009 at 5:19 PM, Zhang Jing-A52198 <j.zhang at motorola.com>
wrote:
Hi All,
When I access the drools-server by URLConnection, I've always got such
errors:
WARNING: RuleAgent(default) EXCEPTION (Mon Feb 02 16:09:46 CST 2009):
org.drools.base.BaseEvaluator; local class incompatible: stream
classdesc serialVersionUID = -7767879457606879276, local class
serialVersionUID = -7149415669283058142. Stack trace should follow.
WARNING: java.io.InvalidClassException: org.drools.base.BaseEvaluator;
local class incompatible: stream classdesc serialVersionUID =
-7767879457606879276, local class serialVersionUID =
-7149415669283058142
at
java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
at
java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.LiteralRestriction.readExternal(LiteralRestriction.java:
66)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.LiteralConstraint.readExternal(LiteralConstraint.java:67
)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.util.ArrayList.readObject(ArrayList.java:593)
at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.Pattern.readExternal(Pattern.java:115)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.util.ArrayList.readObject(ArrayList.java:593)
at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.GroupElement.readExternal(GroupElement.java:57)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.drools.rule.Rule.readExternal(Rule.java:170)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.util.HashMap.readObject(HashMap.java:1029)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.MVELDialectRuntimeData.readExternal(MVELDialectRuntimeDa
ta.java:42)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at java.util.HashMap.readObject(HashMap.java:1030)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegist
ry.java:41)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.rule.Package.readExternal(Package.java:197)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751
)
at
java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at
java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at
org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:189)
at
org.drools.util.DroolsStreamUtils.streamIn(DroolsStreamUtils.java:158)
at
org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:47)
at
org.drools.agent.URLScanner.readPackage(URLScanner.java:148)
at
org.drools.agent.URLScanner.getChangeSet(URLScanner.java:120)
at
org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:96)
at
org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:410)
at
org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:362)
at
org.drools.agent.RuleAgent.configure(RuleAgent.java:347)
at org.drools.agent.RuleAgent.init(RuleAgent.java:247)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)
at
org.drools.server.KnowledgeStatelessServlet.getRuleBase(KnowledgeStatele
ssServlet.java:109)
at
org.drools.server.KnowledgeStatelessServlet.doPost(KnowledgeStatelessSer
vlet.java:71)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at
org.apache.catalina.core.ApplicationFilterChain.servletService(Applicati
onFilterChain.java:411)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:317)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:198)
at
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:390)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:230)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:198)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:288)
at
WARNING:
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardCon
textValve.java:271)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:202)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:206)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
71)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:150)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
71)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdap
ter(DefaultProcessorTask.java:637)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(
DefaultProcessorTask.java:568)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(De
faultProcessorTask.java:813)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcesso
rTask(DefaultReadTask.java:341)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultR
eadTask.java:263)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultR
eadTask.java:214)
at
com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(Po
rtUnificationPipeline.java:380)
at
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
at
com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWork
erThread.java:106)
WARNING: java.lang.NullPointerException
at
org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:363)
at
org.drools.agent.RuleAgent.configure(RuleAgent.java:347)
at org.drools.agent.RuleAgent.init(RuleAgent.java:247)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:187)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:147)
at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:256)
at
org.drools.server.KnowledgeStatelessServlet.getRuleBase(KnowledgeStatele
ssServlet.java:109)
at
org.drools.server.KnowledgeStatelessServlet.doPost(KnowledgeStatelessSer
vlet.java:71)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at
org.apache.catalina.core.ApplicationFilterChain.servletService(Applicati
onFilterChain.java:411)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:317)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:198)
at
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFi
lter.java:390)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:230)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:198)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:288)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardCon
textValve.java:271)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:202)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:206)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
71)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:150)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:632)
at
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java
:577)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:5
71)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdap
ter(DefaultProcessorTask.java:637)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(
DefaultProcessorTask.java:568)
at
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(De
faultProcessorTask.java:813)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcesso
rTask(DefaultReadTask.java:341)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultR
eadTask.java:263)
at
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultR
eadTask.java:214)
at
com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(Po
rtUnificationPipeline.java:380)
at
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
at
com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWork
erThread.java:106)
Can anyone help me to fix this problem? I've got the same errors when
trying to run KnowledgeServiceServletTest.java from the drool-server
source code.
Thanks,
Jing
_______________________________________________
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