<br><font size=2 face="sans-serif">Hi </font>
<br>
<br><font size=2 face="sans-serif">at line number 51 of RuleHandler.java
following assignment is there</font>
<br>
<br><font size=2 face="sans-serif">FlifoDTO flifoDTO = flDTO;</font>
<br>
<br><font size=2 face="sans-serif">this flDTO is comming as parameter of
</font><font size=2 face="Courier New">initMessage</font><font size=2 face="sans-serif">()
which is an instance of FlifoDTO created in main method.</font>
<br><font size=2 face="sans-serif"><br>
Regards<br>
Sanjib Karmakar<br>
SkyTech Solutions Pvt. Ltd<br>
<br>
Please consider the environment before printing this email.</font>
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<td width=40%><font size=1 face="sans-serif"><b>"Wolfgang Laun-2 [via
Drools - Java Rules Engine]" <<a href="/user/SendEmail.jtp?type=node&node=1018292&i=0" target="_top" rel="nofollow">[hidden email]</a>></b>
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<p><font size=1 face="sans-serif">08/03/2010 11:08 AM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">Sanjib Karmakar <<a href="/user/SendEmail.jtp?type=node&node=1018292&i=1" target="_top" rel="nofollow">[hidden email]</a>></font>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: Need help to call method with input
parameter and return type</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=3>ksession hasn't been assigned an object when you call
ksession.insert <br>
in RuleHandler.java:61. <br>
-W <br>
<br>
On 3 August 2010 06:31, Sanjib Karmakar <</font><a href="/user/SendEmail.jtp?type=node&node=1018143&i=0&by-user=t" target=_top rel="nofollow" link="external"><font size=3 color=blue><u>[hidden
email]</u></font></a><font size=3>> wrote: </font>
<br><font size=3><br>
> <br>
> Hi <br>
> <br>
> I am new in drools. In my project I have to call the method define
in xml <br>
> rule file using java <br>
> <br>
> ## Following is my rule xml <br>
> <br>
> <?xml version="1.0" encoding="UTF-8"?> <br>
> Â <package name="com.sample" <br>
> Â Â Â Â xmlns="</font><a href="http://drools.org/drools-5.0" target=_top rel="nofollow" link="external"><font size=3 color=blue><u>http://drools.org/drools-5.0</u></font></a><font size=3>"
<br>
> Â Â Â Â xmlns:xs="</font><a href="http://www.w3.org/2001/XMLSchema-instance" target=_top rel="nofollow" link="external"><font size=3 color=blue><u>http://www.w3.org/2001/XMLSchema-instance</u></font></a><font size=3>"
<br>
> Â Â Â Â xs:schemaLocation="</font><a href="http://drools.org/drools-5.0" target=_top rel="nofollow" link="external"><font size=3 color=blue><u>http://drools.org/drools-5.0</u></font></a><font size=3>
drools.org/drools-5.0.xsd"> <br>
> <import name="com.skyfusion.dto.FlifoDTO" /> <br>
> <br>
> <global identifier="flifoDTO" type="com.skyfusion.dto.FlifoDTO"
/> <br>
> <br>
> <function return-type="FlifoDTO" name="show">
<br>
> Â Â <parameter identifier="appId" type="FlifoDTO.appId"/>
<br>
> Â Â <body> <br>
> Â Â System.out.println("appId " + appId); <br>
> Â Â if(appId==2) <br>
> Â Â Â { <br>
> Â Â Â Â flifoDTO.setChnlName("SKYFUSION.UNI.SIMU.TXT.QUEUE");
<br>
> Â Â Â } <br>
> Â Â if(appId==3) <br>
> Â Â Â { <br>
> Â Â Â Â flifoDTO.setChnlName("SKYFUSION.BASE.MSGFLTR.TXT.TOPIC");
<br>
> Â Â Â } <br>
> Â Â </body> <br>
> </function> <br>
> <br>
> <rule name="Find Channel"> <br>
> Â Â Â Â <lhs> <br>
> Â Â Â Â Â Â Â Â <pattern
identifier="flDTO" object-type="FlifoDTO" > <br>
> Â Â Â Â Â Â Â Â Â
   <field-constraint field-name="flifoType">
<br>
> Â Â Â Â Â Â Â Â Â
       <qualified-identifier-restriction
<br>
> evaluator="==">FlifoDTO.FLIFO</qualified-identifier-restriction>
<br>
> Â Â Â Â Â Â Â Â Â
   </field-constraint> <br>
> Â Â Â Â Â Â Â Â Â
   <field-binding field-name="appId" identifier="ruleDTO"/>
<br>
> Â Â Â Â Â Â Â Â </pattern>
<br>
> Â Â Â Â </lhs> <br>
> Â Â Â Â <rhs> <br>
> Â Â Â Â Â Â Â Â Â //System.out.println(ruleDTO);
<br>
> Â Â Â Â Â Â Â Â Â System.out.println("Find
Channel"); <br>
> Â Â Â Â Â Â Â Â Â //show(appId);
<br>
> Â Â Â Â </rhs> <br>
> </rule> <br>
> <br>
> </package> <br>
> <br>
> ## Following is my DTO class <br>
> <br>
> package com.skyfusion.dto; <br>
> <br>
> public class FlifoDTO <br>
> { <br>
> Â Â Â Â public static final int FLIFO = 1;
<br>
> <br>
> Â Â Â Â private String ruleId; <br>
> Â Â Â Â private int appId; <br>
> Â Â Â Â private int flifoType; <br>
> Â Â Â Â private String chnlName; <br>
> <br>
> Â Â Â Â public FlifoDTO() { <br>
> Â Â Â Â } <br>
> Â Â Â Â public int getAppId() { <br>
> Â Â Â Â Â Â Â Â return
appId; <br>
> Â Â Â Â } <br>
> Â Â Â Â public void setAppId(int appId) { <br>
> Â Â Â Â Â Â Â Â this.appId
= appId; <br>
> Â Â Â Â } <br>
> Â Â Â Â public String getChnlName() { <br>
> Â Â Â Â Â Â Â Â return
chnlName; <br>
> Â Â Â Â } <br>
> Â Â Â Â public void setChnlName(String chnlName)
{ <br>
> Â Â Â Â Â Â Â Â this.chnlName
= chnlName; <br>
> Â Â Â Â } <br>
> Â Â Â Â public void setRuleId(String ruleId)
{ <br>
> Â Â Â Â Â Â Â Â this.ruleId
= ruleId; <br>
> Â Â Â Â } <br>
> Â Â Â Â public String getRuleId() { <br>
> Â Â Â Â Â Â Â Â return
ruleId; <br>
> Â Â Â Â } <br>
> Â Â Â Â public int getFlifoType() { <br>
> Â Â Â Â Â Â Â Â return
flifoType; <br>
> Â Â Â Â } <br>
> Â Â Â Â public void setFlifoType(int flifoType)
{ <br>
> Â Â Â Â Â Â Â Â this.flifoType
= flifoType; <br>
> Â Â Â Â } <br>
> } <br>
> <br>
> ## Following is my rule execution class <br>
> <br>
> package com.skyfusion.rule.handler; <br>
> <br>
> import org.drools.KnowledgeBase; <br>
> import org.drools.KnowledgeBaseFactory; <br>
> import org.drools.builder.KnowledgeBuilder; <br>
> import org.drools.builder.KnowledgeBuilderError; <br>
> import org.drools.builder.KnowledgeBuilderErrors; <br>
> import org.drools.builder.KnowledgeBuilderFactory; <br>
> import org.drools.builder.ResourceType; <br>
> import org.drools.io.ResourceFactory; <br>
> import org.drools.runtime.StatefulKnowledgeSession; <br>
> <br>
> import com.skyfusion.dto.FlifoDTO; <br>
> <br>
> public class RuleHandler { <br>
> <br>
> Â Â Â Â private StatefulKnowledgeSession ksession
= null; <br>
> Â Â Â Â private KnowledgeBase kbase = null;
<br>
> <br>
> Â Â Â Â public RuleHandler() <br>
> Â Â Â Â { <br>
> Â Â Â Â Â Â Â Â try
{ <br>
> Â Â Â Â Â Â Â Â Â
   // load up the knowledge base <br>
> Â Â Â Â Â Â Â Â Â
   kbase = readKnowledgeBase(); <br>
> Â Â Â Â Â Â Â Â Â
   ksession = kbase.newStatefulKnowledgeSession();
<br>
> Â Â Â Â Â Â Â Â } catch
(Exception t) { <br>
> Â Â Â Â Â Â Â Â Â
   t.printStackTrace(); <br>
> Â Â Â Â Â Â Â Â } <br>
> Â Â Â Â } <br>
> <br>
> Â Â Â Â private KnowledgeBase readKnowledgeBase()
<br>
> Â Â Â Â throws Exception <br>
> Â Â Â Â { <br>
> Â Â Â Â Â Â Â Â KnowledgeBuilder
kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); <br>
> Â Â Â Â Â Â Â Â kbuilder.add(ResourceFactory.newClassPathResource("fliforule.xml"),
<br>
> ResourceType.XDRL); <br>
> Â Â Â Â Â Â Â Â KnowledgeBuilderErrors
errors = kbuilder.getErrors(); <br>
> Â Â Â Â Â Â Â Â if
(errors.size() > 0) { <br>
> Â Â Â Â Â Â Â Â Â
   for (KnowledgeBuilderError error: errors) { <br>
> Â Â Â Â Â Â Â Â Â
       System.out.println(error);
<br>
> Â Â Â Â Â Â Â Â Â
   } <br>
> Â Â Â Â Â Â Â Â Â
   throw new IllegalArgumentException("Could not
parse knowledge."); <br>
> Â Â Â Â Â Â Â Â } <br>
> Â Â Â Â Â Â Â Â KnowledgeBase
kbase = KnowledgeBaseFactory.newKnowledgeBase(); <br>
> Â Â Â Â Â Â Â Â kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
<br>
> Â Â Â Â Â Â Â Â return
kbase; <br>
> Â Â Â Â } <br>
> <br>
> Â Â Â Â public FlifoDTO initMessage(String
ruleID, FlifoDTO flDTO, int appId, int <br>
> type) <br>
> Â Â Â Â throws Exception <br>
> Â Â Â Â { <br>
> Â Â Â Â Â Â Â Â FlifoDTO
flifoDTO = flDTO; <br>
> Â Â Â Â Â Â Â Â try
<br>
> Â Â Â Â Â Â Â Â {
<br>
> Â Â Â Â Â Â Â Â Â
   flifoDTO.setRuleId(ruleID); <br>
> Â Â Â Â Â Â Â Â Â
   flifoDTO.setAppId(appId); <br>
> Â Â Â Â Â Â Â Â Â
   flifoDTO.setFlifoType(type); <br>
> Â Â Â Â Â Â Â Â Â
   ksession.insert(flifoDTO); <br>
> Â Â Â Â Â Â Â Â Â
   ksession.fireAllRules(); <br>
> Â Â Â Â Â Â Â Â }catch(Exception
t) <br>
> Â Â Â Â Â Â Â Â Â {
<br>
> Â Â Â Â Â Â Â Â Â
   t.printStackTrace(); <br>
> Â Â Â Â Â Â Â Â Â }
<br>
> Â Â Â Â Â Â Â Â return
flifoDTO; <br>
> Â Â Â Â } <br>
> <br>
> Â Â Â Â public static void main(String args[]){
<br>
> Â Â Â Â Â Â Â Â RuleHandler
rh = new RuleHandler(); <br>
> Â Â Â Â Â Â Â Â FlifoDTO
flifoDTO = new FlifoDTO(); <br>
> Â Â Â Â Â Â Â Â try
{ <br>
> Â Â Â Â Â Â Â Â Â
   flifoDTO = rh.initMessage("Find Channel",flifoDTO,2,1);
<br>
> Â Â Â Â Â Â Â Â } catch
(Exception e) { <br>
> Â Â Â Â Â Â Â Â Â
   e.printStackTrace(); <br>
> Â Â Â Â Â Â Â Â } <br>
> Â Â Â Â Â Â Â Â System.out.println(flifoDTO.getChnlName());
<br>
> Â Â Â Â } <br>
> } <br>
> <br>
> ## I am getting the following exception <br>
> <br>
> java.lang.IllegalArgumentException: Could not parse knowledge. <br>
> Â Â Â Â at <br>
> com.skyfusion.rule.handler.RuleHandler.readKnowledgeBase(RuleHandler.java:45)
<br>
> Â Â Â Â at com.skyfusion.rule.handler.RuleHandler.<init>(RuleHandler.java:28)
<br>
> Â Â Â Â at com.skyfusion.rule.handler.RuleHandler.main(RuleHandler.java:71)
<br>
> java.lang.NullPointerException <br>
> Â Â Â Â at com.skyfusion.rule.handler.RuleHandler.initMessage(RuleHandler.java:61)
<br>
> Â Â Â Â at com.skyfusion.rule.handler.RuleHandler.main(RuleHandler.java:74)
<br>
> (null: 29, 54): schema_reference.4: Failed to read schema document
<br>
> 'drools.org/drools-5.0.xsd', because 1) could not find the document;
2) the <br>
> document could not be read; 3) the root element of the document is
not <br>
> <xsd:schema>. <br>
> (null: 31, 60): schema_reference.4: Failed to read schema document
<br>
> 'drools.org/drools-5.0.xsd', because 1) could not find the document;
2) the <br>
> document could not be read; 3) the root element of the document is
not <br>
> <xsd:schema>. <br>
> (null: 34, 7): schema_reference.4: Failed to read schema document
<br>
> 'drools.org/drools-5.0.xsd', because 1) could not find the document;
2) the <br>
> document could not be read; 3) the root element of the document is
not <br>
> <xsd:schema>. <br>
> Error importing : 'com.sample.Show.show' <br>
> [ show : unable to resolve type while building function <br>
> Â ] <br>
> [ show : Function Compilation error <br>
> show (line:-2): FlifoDTO.appId cannot be resolved to a type <br>
> show (line:3): flifoDTO cannot be resolved <br>
> show (line:7): flifoDTO cannot be resolved <br>
> Â ] <br>
> [ show : Function Compilation error <br>
> show (line:-2): FlifoDTO.appId cannot be resolved to a type <br>
> show (line:3): flifoDTO cannot be resolved <br>
> show (line:7): flifoDTO cannot be resolved <br>
> Â ] <br>
> Rule Compilation error : [Rule name='Find Channel'] <br>
> Â Â Â Â com/sample/Rule_Find_Channel_0.java
(2:89) : The import com.sample.Show <br>
> cannot be resolved <br>
> <br>
> Error importing : 'com.sample.Show.show' <br>
> null <br>
> <br>
> ## Please let me know I am missing. <br>
> <br>
> Thanks in advance <br>
> <br>
> -- <br>
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