Examples of org.drools.runtime.StatelessKnowledgeSession

org.drools.runtime.StatelessKnowledgeSession
a global hibernate session, that can be used for DB interactions in the rules. ksession.execute( collection ); // this will now execute and will be able to resolve the "hbnSession" identifier.
The third way is execution scopped globals using the CommandExecutor and SetGlobal Commands:
```
 List cmds = new ArrayList(); cmds.add( CommandFactory.newSetGlobal( "list1", new ArrayList() ) ); cmds.add( CommandFactory.newInsert( new Person( "jon", 102 ) ) ); ksession.execute( CommandFactory.newBatchExecution( cmds ) ); 
```
The CommandExecutor interface also supports the ability to export data via "out" parameters. Inserted facts, globals and query results can all be returned.
```
 List cmds = new ArrayList(); cmds.add( CommandFactory.newSetGlobal( "list1", new ArrayList(), true ) ); cmds.add( CommandFactory.newInsert( new Person( "jon", 102 ), "person" ) ); cmds.add( CommandFactory.newQuery( "Get People" "getPeople" ); ExecutionResults results = ksession.execute( CommandFactory.newBatchExecution( cmds ) ); results.getValue( "list1" ); // returns the ArrayList results.getValue( "person" ); // returns the inserted fact Person results.getValue( "Get People" );// returns the query as a QueryResults instance. 
```
@see org.drools.runtime.CommandExecutor @see org.drools.runtime.command.CommandFactory @see org.drools.runtime.command.BatchExecution @see org.drools.runtime.ExecutionResults.BatchExecutionResults @see org.drools.runtime.help.BatchExecutionHelp @see org.drools.runtime.pipeline.PipelineFactory @see org.drools.runtime.Globals

        }


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal( "list",
                            list );
        TestVariable person = new TestVariable( "John Doe" );


        String inXml = "";
        inXml += "<batch-execution>";

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        Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();


        kbase.addKnowledgePackages( pkgs );
        StatelessKnowledgeSession session = kbase.newStatelessKnowledgeSession();


        return session;
    }

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        inXml += "   {   \"org.drools.Cheese\":{\"type\":\"stilton\",\"price\":30,\"oldPrice\":0}} ";
        inXml += "   ]}}";
        inXml += "]}}";
        inXml = roundTripFromXml( inXml );


        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        ResultHandlerImpl resultHandler = new ResultHandlerImpl();
        getPipeline( ksession ).insert( inXml,
                                        resultHandler );
        String outXml = (String) resultHandler.getObject();
        outXml = roundTripFromXml( outXml );

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        inXml += "} } ";
        inXml += ", {\"insert\":{\"object\":{\"org.drools.Cheese\":{\"type\":\"stilton\",\"price\":5}}, \"out-identifier\":\"outStilton\" } }";
        inXml += "]}}";
        inXml = roundTripFromXml( inXml );


        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        ResultHandlerImpl resultHandler = new ResultHandlerImpl();
        getPipeline( ksession ).insert( inXml,
                                        resultHandler );


        String outXml = (String) resultHandler.getObject();

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        inXml += ",  {\"insert\":{\"object\":{\"org.drools.Cheese\":{\"type\":\"stilton\",\"price\":25,\"oldPrice\":0}}, \"out-identifier\":\"outStilton\" } }";
        inXml += ",  {\"get-global\":{\"identifier\":\"list1\",\"out-identifier\"=\"out-list\"}}";
        inXml += "]}}";
        inXml = roundTripFromXml( inXml );


        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        ResultHandlerImpl resultHandler = new ResultHandlerImpl();
        getPipeline( ksession ).insert( inXml,
                                        resultHandler );
        String outXml = (String) resultHandler.getObject();
        outXml = roundTripFromXml( outXml );

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        inXml += "   ]}}";
        inXml += ",  {\"get-objects\":{\"out-identifier\":\"list1\"}}";
        inXml += "]}}";
        inXml = roundTripFromXml( inXml );
        
        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        ResultHandlerImpl resultHandler = new ResultHandlerImpl();
        getPipeline( ksession ).insert( inXml,
                                        resultHandler );
        String outXml = (String) resultHandler.getObject();
        outXml = roundTripFromXml( outXml );

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        inXml += ", {\"fire-all-rules\":\"\"}";
        inXml += ", {\"insert\":{\"object\":{\"org.drools.Cheese\":{\"type\":\"brie\",\"price\":10,\"oldPrice\":0}}, \"out-identifier\":\"outBrie\" } }";
        inXml += "]}}";
        inXml = roundTripFromXml( inXml );
        
        StatelessKnowledgeSession ksession = getSession2( ResourceFactory.newByteArrayResource( str.getBytes() ) );
        ResultHandlerImpl resultHandler = new ResultHandlerImpl();
        getPipeline( ksession ).insert( inXml,
                                        resultHandler );
        String outXml = (String) resultHandler.getObject();

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        }


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        List<String> list = new ArrayList<String>();
        ksession.setGlobal( "list1",
                            list );
        TestVariable person = new TestVariable( "John Doe" );
        
        String inXml = "";
        inXml += "{\"batch-execution\":{\"commands\":[";

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        Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();


        kbase.addKnowledgePackages( pkgs );
        StatelessKnowledgeSession session = kbase.newStatelessKnowledgeSession();


        return session;
    }

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        assertFalse( kbuilder.hasErrors() );


        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
        kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
        List list = new ArrayList();
        ksession.setGlobal( "list",
                            list );


        Action executeResultHandler = PipelineFactory.newExecuteResultHandler();
        
        Action assignResult = PipelineFactory.newAssignObjectAsResult();

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