Examples of org.drools.common.DefaultAgenda.fireNextItem()

org.drools.common.DefaultAgenda.fireNextItem()
Fire the next scheduled Agenda item, skipping items that are not allowed by the agenda filter. @return true if an activation was fired. false if no more activations to fire @throws ConsequenceException If an error occurs while firing an agenda item.

        // check totalAgendaSize still works
        assertEquals( 5,
                      agenda.agendaSize() );


        // ok now lets check that stacks work with fireNextItem
        agenda.fireNextItem( null );


        // agendaGroup2 should still be the current agendaGroup
        assertEquals( agendaGroup2,
                      agenda.getFocus() );
        // agendaGroup2 has gone from 2 to one activations

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        // check totalAgendaSize has reduced too
        assertEquals( 4,
                      agenda.agendaSize() );


        // now repeat the process
        agenda.fireNextItem( null );


        // focus is still agendaGroup2, but now its empty
        assertEquals( agendaGroup2,
                      agenda.getFocus() );
        assertEquals( 0,

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                      agenda.getFocus().size() );
        assertEquals( 3,
                      agenda.agendaSize() );


        // repeat fire again
        agenda.fireNextItem( null );


        // agendaGroup2 is empty so it should be popped from the stack making agendaGroup1 the current agendaGroup
        assertEquals( agendaGroup1,
                      agenda.getFocus() );
        // agendaGroup1 had 2 activations, now it only has 1

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                      agenda.getFocus().size() );
        assertEquals( 2,
                      agenda.agendaSize() );


        // repeat fire again
        agenda.fireNextItem( null );


        assertEquals( agendaGroup1,
                      agenda.getFocus() );
        assertEquals( 0,
                      agenda.getFocus().size() );

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                      agenda.agendaSize() );


        // this last fire is more interesting as it demonstrates that
        // agendaGroup1 on
        // the stack before agendaGroup2 gets skipped as it has no activations
        agenda.fireNextItem( null );


        assertEquals( agenda.getFocus(),
                      main );
        assertEquals( 0,
                      agenda.getFocus().size() );

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        assertEquals( 2,
                      agenda.agendaSize() );


        // As we fire the rule, rule0 should execute first, as it has higher salience.
        // Rule0 should deactivate rule1 as well, so the everything should be empty
        agenda.fireNextItem( null );
        assertEquals( 0,
                      ruleFlowGroup0.size() );
        assertEquals( 0,
                      agenda.agendaSize() );

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                      ruleFlowGroup0.size() );
        assertEquals( 1,
                      agenda.agendaSize() );


        // Execute activation
        agenda.fireNextItem( null );
        assertEquals( 0,
                      ruleFlowGroup0.size() );
        assertEquals( 0,
                      agenda.agendaSize() );
        assertTrue( ruleFlowGroup0.isActive() );

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        assertEquals( 1,
                      agenda.agendaSize() );
        assertTrue( ruleFlowGroup0.isActive() );


        // Execute the activation, the RuleFlowGroup should automatically deactivate
        agenda.fireNextItem( null );
        assertEquals( 0,
                      ruleFlowGroup0.size() );
        assertEquals( 0,
                      agenda.agendaSize() );
        workingMemory.executeQueuedActions();

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        // check totalAgendaSize still works
        assertEquals( 5,
                      agenda.agendaSize() );


        // ok now lets check that stacks work with fireNextItem
        agenda.fireNextItem( null );


        // agendaGroup3 should still be the current agendaGroup
        assertEquals( agenda.getFocus(),
                      agendaGroup3 );
        // agendaGroup3 has gone from 2 to one activations

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        // check totalAgendaSize has reduced too
        assertEquals( 4,
                      agenda.agendaSize() );


        // now repeat the process
        agenda.fireNextItem( null );


        // focus is still agendaGroup3, but now its empty
        assertEquals( agenda.getFocus(),
                      agendaGroup3 );
        assertEquals( 0,

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