Examples of org.apache.commons.chain.Context

org.apache.commons.chain.Context

A {@link Context} represents the state information that isaccessed and manipulated by the execution of a {@link Command} or a{@link Chain}. Specialized implementations of {@link Context} willtypically add JavaBeans properties that contain typesafe accessors to information that is relevant to a particular use case for this context, and/or add operations that affect the state information that is saved in the context.

Implementations of {@link Context} must also implement all of therequired and optional contracts of the java.util.Map interface.

It is strongly recommended, but not required, that JavaBeans properties added to a particular {@link Context} implementation exhibitAttribute-Property Transparency. In other words, a value stored via a call to setFoo(value) should be visible by calling get("foo"), and a value stored via a call to put("foo", value) should be visible by calling getFoo(). If your {@link Context}implementation class exhibits this featue, it becomes easier to reuse the implementation in multiple environments, without the need to cast to a particular implementation class in order to access the property getter and setter methods.

To protect applications from evolution of this interface, specialized implementations of {@link Context} should generally be created by extendingthe provided base class ( {@link org.apache.commons.chain.impl.ContextBase}) rather than directly implementing this interface.

Applications should NOT assume that {@link Context} implementations, or the values stored in itsattributes, may be accessed from multiple threads simultaneously unless this is explicitly documented for a particular implementation.
@author Craig R. McClanahan @version $Revision: 1.6 $ $Date: 2004/02/25 00:01:07 $


    public void testAlternateContext() throws Exception {
        TestAlternateContextCommand test = new TestAlternateContextCommand();


        test.setMethod("foo");
        Context context = new ContextBase();
        assertNull(context.get("elephant"));
        boolean result = test.execute(context);
        assertTrue(result);
        assertNotNull(context.get("elephant"));
        assertEquals("elephant", context.get("elephant"));




    }

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            System.setProperty("logback.configurationFile", "logback-cli.xml");


            String uri = command.getOptionValue("cli");
            Repository repository = JcrUtils.getRepository(uri);


            Context context = new ContextBase();
            CommandHelper.setRepository(context, repository, uri);
            try {
                Session session = repository.login();
                CommandHelper.setSession(context, session);
                CommandHelper.setCurrentNode(context, session.getRootNode());

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        // Compare to self
        assertTrue(context.equals(context));
        assertTrue(context.hashCode() == context.hashCode());


        // Compare to equivalent instance
        Context other = createContext();
        assertTrue(context.equals(other));
        assertTrue(context.hashCode() == other.hashCode());


        // Compare to non-equivalent instance - other modified
        other.put("bop", "bop value");
        assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


        // Compare to non-equivalent instance - self modified
        other = createContext(); // reset to equivalence
        context.put("bop", "bop value");
        assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


    }

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        // Compare to self
        assertTrue(context.equals(context));
        assertTrue(context.hashCode() == context.hashCode());


        // Compare to equivalent instance
        Context other = new ServletWebContext(scontext, request, response);
        // assertTrue(context.equals(other));
        assertTrue(context.hashCode() == other.hashCode());


        // Compare to non-equivalent instance - other modified
        other.put("bop", "bop value");
        // assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


        // Compare to non-equivalent instance - self modified
        other = new ServletWebContext(scontext, request, response);
        context.put("bop", "bop value");
        // assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


    }

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        // Compare to self
        assertTrue(context.equals(context));
        assertTrue(context.hashCode() == context.hashCode());


        // Compare to equivalent instance
        Context other = new PortletWebContext(pcontext, request, response);
        // assertTrue(context.equals(other));
        assertTrue(context.hashCode() == other.hashCode());


        // Compare to non-equivalent instance - other modified
        other.put("bop", "bop value");
        // assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


        // Compare to non-equivalent instance - self modified
        other = new PortletWebContext(pcontext, request, response);
        context.put("bop", "bop value");
        // assertTrue(!context.equals(other));
        assertTrue(context.hashCode() != other.hashCode());


    }

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    public void testMethodDispatch() throws Exception {
        TestCommand test = new TestCommand();


        test.setMethod("testMethod");
        Context context = new ContextBase();
        assertNull(context.get("foo"));
        boolean result = test.execute(context);
        assertTrue(result);
        assertNotNull(context.get("foo"));
        assertEquals("foo", context.get("foo"));




    }

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    public void testMethodKeyDispatch() throws Exception {
        TestCommand test = new TestCommand();


        test.setMethodKey("foo");
        Context context = new ContextBase();
        context.put("foo", "testMethodKey");
        assertNull(context.get("bar"));
        boolean result = test.execute(context);
        assertFalse(result);
        assertNotNull(context.get("bar"));
        assertEquals("bar", context.get("bar"));




    }

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    public void testAlternateContext() throws Exception {
        TestAlternateContextCommand test = new TestAlternateContextCommand();


        test.setMethod("foo");
        Context context = new ContextBase();
        assertNull(context.get("elephant"));
        boolean result = test.execute(context);
        assertTrue(result);
        assertNotNull(context.get("elephant"));
        assertEquals("elephant", context.get("elephant"));




    }

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                                 HttpServletRequest request,
                                 HttpServletResponse response)
        throws Exception {


        // Set up a context for this request
        Context context = new ServletWebContext
            (getServlet().getServletContext(), request, response);
        context.put("mapping", mapping);
        context.put("form", form);


        // Delegate to the specified command
        String name = mapping.getParameter();
        Command command = getCatalog().getCommand(request.getParameter(name));
        command.execute(context); // Ignore return state


        // Return results as appropriate
        Exception exception = null;
        try {
            exception = (Exception) context.get("exception");
            if (exception != null) {
                throw exception;
            }
        } catch (ClassCastException e) {
            ; // It is not an Exception
        }
        ActionForward forward = null;
        try {
            forward = (ActionForward) context.get("forward");
        } catch (ClassCastException e) {
            forward = null; // It is not an ActionForward
        }
        return forward;

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                                 HttpServletRequest request,
                                 HttpServletResponse response)
        throws Exception {


        // Set up a context for this request
        Context context = new ServletWebContext
            (getServlet().getServletContext(), request, response);
        context.put("mapping", mapping);
        context.put("form", form);


        // Delegate to the specified command
        Command command = getCatalog().getCommand(mapping.getParameter());
        command.execute(context); // Ignore return state


        // Return results as appropriate
        Exception exception = null;
        try {
            exception = (Exception) context.get("exception");
            if (exception != null) {
                throw exception;
            }
        } catch (ClassCastException e) {
            ; // It is not an Exception
        }
        ActionForward forward = null;
        try {
            forward = (ActionForward) context.get("forward");
        } catch (ClassCastException e) {
            forward = null; // It is not an ActionForward
        }
        return forward;

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Related Classes of org.apache.commons.chain.Context

org.apache.commons.chain.generic.DispatchCommandTestCase

org.apache.commons.chain.impl.ContextBaseTestCase

org.apache.commons.chain.web.portlet.PortletWebContextTestCase

org.apache.commons.chain.web.servlet.ServletWebContextTestCase

org.apache.jackrabbit.standalone.Main

org.apache.shale.remoting.impl.ChainProcessorTestCase

org.apache.struts.chain.commands.generic.TestWrappingLookupCommand

org.apache.struts.chain.legacy.ChainAction

org.apache.struts.chain.legacy.DispatchAction

org.exoplatform.services.command.CommandServiceTest

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