Examples of org.impalaframework.module.ModuleDefinition

org.impalaframework.module.ModuleDefinition
{@link ModuleDefinition} exposes a number of methods which return informationon a module, such as name, type and the identity of parent and child modules. ModuleDefinition has a similar role in Impala to the role of {@link org.springframework.beans.factory.config.BeanDefinition}s in Spring. A hierarchy of {@link ModuleDefinition}s can be considered an abstract representation of the module hierarchy, which can be manipulated separately from the runtime module hierarchy (which is essentially a hierarchy of Spring application contexts). At the root of the a hierarchy of module definitions is an instance of {@link RootModuleDefinition}, which exposes another couple of methods specific to root modules. @see RootModuleDefinition @author Phil Zoio

        super.setUp();
        reader = new ApplicationModuleTypeReader();
    }


    public void testReadModuleDefinition() {
        ModuleDefinition definition = reader.readModuleDefinition(null, "mymodule", new Properties());
        SimpleModuleDefinition moduleDefinition = (SimpleModuleDefinition) definition;
        assertEquals("mymodule", moduleDefinition.getName());
        assertEquals(ModuleTypes.APPLICATION, moduleDefinition.getType());
        assertEquals("spring", moduleDefinition.getRuntimeFramework());
    }

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        properties.put(ModuleElementNames.RELOADABLE_ELEMENT, "false");
        properties.put("prop1", "value1");
        properties.put("prop2", "value2");
        properties.put("runtime", "myruntime");
        
        ModuleDefinition definition = reader.readModuleDefinition(null, "mymodule", properties);
        SimpleModuleDefinition moduleDefinition = (SimpleModuleDefinition) definition;
        assertEquals("mymodule", moduleDefinition.getName());
        assertEquals(ModuleTypes.APPLICATION, moduleDefinition.getType());
        assertEquals(Arrays.asList(new String[]{ "loc1", "loc2", "loc3"}), moduleDefinition.getConfigLocations());
        assertEquals(Arrays.asList(new String[]{ "module1", "module2", "module3", "module4", "module5"}), moduleDefinition.getDependentModuleNames(false));

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    //same as 3, but adds d, and adds adds g, which depends on d
    private SimpleRootModuleDefinition definitionSet3() {
        List<ModuleDefinition> definitions = new ArrayList<ModuleDefinition>();


        //a has no parent or dependencies
        ModuleDefinition a = newDefinition(definitions, null, "a", null);


        //c has no parent or dependencies
        ModuleDefinition c = newDefinition(definitions, null, "c", null);
        
        ModuleDefinition d = newDefinition(definitions, null, "d", null);
        
        //root has siblings a and c, and depends on a
        SimpleRootModuleDefinition root = new SimpleRootModuleDefinition("root", 
                new String[] {"root.xml"}, 
                new String[] {"a"}, 
                null,
                new ModuleDefinition[] {a, c, d}, null, null, true);
        
        //e has parent root, and depends on a and c
        ModuleDefinition e = newDefinition(definitions, root, "e", "a,c");
        
        //f has parent e, but no other dependencies
        newDefinition(definitions, e, "f", null);


        //has parent e, depends on d

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        reader.readModuleDefinitionProperties(properties, "mymodule", root);
        System.out.println(properties);
        assertEquals("location1,location2", properties.get("config-locations"));
        assertEquals("module1,module2,module3,module4,module5", properties.get("depends-on"));
        
        ModuleDefinition moduleDefinition = reader.readModuleDefinition(new SimpleModuleDefinition("parent"), "mymodule", root);
        assertFalse(moduleDefinition.isReloadable());
        assertEquals(Arrays.asList(new String[]{ "location1", "location2"}), moduleDefinition.getConfigLocations());
        assertEquals(Arrays.asList(new String[]{ "parent", "module1", "module2", "module3", "module4", "module5"}), moduleDefinition.getDependentModuleNames(false));
        
        
        Map<String,String> expectedAttributes = new HashMap<String,String>();
        expectedAttributes.put("prop1", "value1");
        expectedAttributes.put("prop2", "value2");
        assertEquals(expectedAttributes, moduleDefinition.getAttributes());
        assertEquals("myruntime", moduleDefinition.getRuntimeFramework());
        
        assertEquals("persistence,clustering", StringUtils.collectionToCommaDelimitedString(moduleDefinition.getCapabilities()));
    }

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    //same as 4, but g does not depend on d
    private SimpleRootModuleDefinition definitionSet4() {
        List<ModuleDefinition> definitions = new ArrayList<ModuleDefinition>();


        //a has no parent or dependencies
        ModuleDefinition a = newDefinition(definitions, null, "a", null);


        //c has no parent or dependencies
        ModuleDefinition c = newDefinition(definitions, null, "c", null);
        
        ModuleDefinition d = newDefinition(definitions, null, "d", null);
        
        //root has siblings a and c, and depends on a
        SimpleRootModuleDefinition root = new SimpleRootModuleDefinition("root", 
                new String[] {"root.xml"}, 
                new String[] {"a"}, 
                null,
                new ModuleDefinition[] {a, c, d}, null, null, true);
        
        //e has parent root, and depends on a and c
        ModuleDefinition e = newDefinition(definitions, root, "e", "a,c");
        
        //f has parent e, but no other dependencies
        newDefinition(definitions, e, "f", null);


        //has parent e, depends on d

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    private SimpleRootModuleDefinition definitionSet1() {
        List<ModuleDefinition> definitions = new ArrayList<ModuleDefinition>();
        
        //a has no parent or dependencies
        ModuleDefinition a = newDefinition(definitions, null, "a", null);
        
        //b depends on d but has no parent
        ModuleDefinition b = newDefinition(definitions, null, "b", "d");
        
        //c has no parent or dependencies
        ModuleDefinition c = newDefinition(definitions, null, "c", null);
        
        //d has no parent or dependencies
        ModuleDefinition d = newDefinition(definitions, null, "d", null);
        
        //root has siblings a to d, and depends on a
        SimpleRootModuleDefinition root = new SimpleRootModuleDefinition("root", 
                new String[] {"root.xml"}, 
                new String[] {"a"}, 
                null,
                new ModuleDefinition[] {a, b, c, d}, null, null, true);
        //e has parent root, and depends on b an d
        ModuleDefinition e = newDefinition(definitions, root, "e", "c");
        
        //has parent e, and depends on c
        newDefinition(definitions, e, "f", "c");


        //has parent e, depends on f

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        moduleStateHolder = (DefaultModuleStateHolder) application.getModuleStateHolder();
    }


    public void testResourceBasedValue() {
        ModuleDefinitionSource source = new SimpleModuleDefinitionSource(rootProjectName, new String[] { "parentTestContext.xml" }, new String[] { plugin1, plugin2 });
        ModuleDefinition p2 = source.getModuleDefinition().getChildModuleDefinition(plugin2);
        new SimpleModuleDefinition(p2, plugin3);
        addModule(source);


        ClassLoader originalClassLoader = this.getClass().getClassLoader();

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    public void testLoadUnloadModules() {


        ModuleDefinitionSource source = new SimpleModuleDefinitionSource(rootProjectName, new String[] { "parentTestContext.xml" }, new String[] { plugin1, plugin2 });


        addModule(source);
        ModuleDefinition root = source.getModuleDefinition();


        ConfigurableApplicationContext parent = SpringModuleUtils.getRootSpringContext(moduleStateHolder);
        assertNotNull(parent);
        assertEquals(3, moduleStateHolder.getRuntimeModules().size());


        FileMonitor bean1 = (FileMonitor) parent.getBean("bean1");
        assertEquals(999L, bean1.lastModified((File) null));


        FileMonitor bean2 = (FileMonitor) parent.getBean("bean2");
        assertEquals(100L, bean2.lastModified((File) null));


        // shutdown module and check behaviour has gone
        removeModule(plugin2);


        try {
            bean2.lastModified((File) null);
            fail();
        }
        catch (NoServiceException e) {
        }


        // bean 2 still works
        assertEquals(999L, bean1.lastModified((File) null));


        removeModule(plugin1);


        try {
            bean1.lastModified((File) null);
            fail();
        }
        catch (NoServiceException e) {
        }


        // now reload the module, and see that behaviour returns
        
        addModule(new SimpleModuleDefinition(plugin2));
        bean2 = (FileMonitor) parent.getBean("bean2");
        assertEquals(100L, bean2.lastModified((File) null));


        addModule(new SimpleModuleDefinition(plugin1));
        bean1 = (FileMonitor) parent.getBean("bean1");
        assertEquals(999L, bean1.lastModified((File) null));


        FileMonitor bean3 = (FileMonitor) parent.getBean("bean3");
        try {
            bean3.lastModified((File) null);
            fail();
        }
        catch (NoServiceException e) {
        }


        ModuleDefinition p2 = root.getChildModuleDefinition(plugin2);
        addModule(new SimpleModuleDefinition(p2, plugin3));
        assertEquals(333L, bean3.lastModified((File) null));


        final ConfigurableApplicationContext applicationPlugin3 = SpringModuleUtils.getModuleSpringContext(moduleStateHolder, plugin3);
        applicationPlugin3.close();

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    }


    public void testLoadAll() {


        ModuleDefinitionSource source = new SimpleModuleDefinitionSource(rootProjectName, new String[] { "parentTestContext.xml" }, new String[] { plugin1, plugin2 });
        final ModuleDefinition p2 = source.getModuleDefinition().getChildModuleDefinition(plugin2);
        new SimpleModuleDefinition(p2, plugin3);


        addModule(source);


        ConfigurableApplicationContext parent = SpringModuleUtils.getRootSpringContext(moduleStateHolder);

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        ApplicationModuleLoader rootModuleLoader = new ApplicationModuleLoader();
        moduleLoaderRegistry.addItem(ModuleTypes.ROOT, rootModuleLoader);
        ApplicationModuleLoader applicationModuleLoader = new ApplicationModuleLoader();
        moduleLoaderRegistry.addItem(ModuleTypes.APPLICATION, applicationModuleLoader);


        ModuleDefinition p = new SimpleRootModuleDefinition(rootModuleName, new String[] { "parent-context.xml" });
        assertTrue(moduleLoaderRegistry.getModuleLoader(p.getType()) instanceof ApplicationModuleLoader);


        DelegatingContextLoader delegatingLoader = new DelegatingContextLoader() {
            public ConfigurableApplicationContext loadApplicationContext(ApplicationContext parent,
                    ModuleDefinition definition) {
                return null;

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