Examples of org.apache.struts2.components.ActionComponent

org.apache.struts2.components.ActionComponent
This tag enables developers to call actions directly from a JSP page by specifying the action name and an optional namespace. The body content of the tag is used to render the results from the Action. Any result processor defined for this action in struts.xml will be ignored, unless the executeResult parameter is specified.
- id (String) - the id (if specified) to put the action under stack's context.
- name* (String) - name of the action to be executed (without the extension suffix eg. .action)
- namespace (String) - default to the namespace where this action tag is invoked
- executeResult (Boolean) - default is false. Decides whether the result of this action is to be executed or not
- ignoreContextParams (Boolean) - default to false. Decides whether the request parameters are to be included when the action is invoked
```
  public class ActionTagAction extends ActionSupport { public String execute() throws Exception { return "done"; } public String doDefault() throws Exception { ServletActionContext.getRequest().setAttribute("stringByAction", "This is a String put in by the action's doDefault()"); return "done"; } }  
```
```
   ....  success.jsp   success.jsp  ....   
```
```
  The following action tag will execute result and include it in this page
 
  
 The following action tag will do the same as above, but invokes method specialMethod in action
 
  
 The following action tag will not execute result, but put a String in request scope under an id "stringByAction" which will be retrieved using property tag
    
```

        tag.setName(TestConfigurationProvider.TEST_NAMESPACE_ACTION);
        tag.setId(TestConfigurationProvider.TEST_NAMESPACE_ACTION);


        try {
            tag.doStartTag();
            ActionComponent ac = ((ActionComponent) tag.component);
            tag.doEndTag();
            ActionProxy proxy = ac.getProxy();


            Object o = pageContext.findAttribute(TestConfigurationProvider.TEST_NAMESPACE_ACTION);
            assertTrue(o instanceof TestAction);


            assertEquals(TestConfigurationProvider.TEST_NAMESPACE, proxy.getNamespace());

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        tag.setExecuteResult(true);


        tag.doStartTag();


        // tag clear components on doEndTag
        ActionComponent component = (ActionComponent) tag.getComponent();


        tag.doEndTag();


        TestActionTagResult result = (TestActionTagResult) component.getProxy().getInvocation().getResult();


        assertTrue(stack.getContext().containsKey(ServletActionContext.PAGE_CONTEXT));
        assertTrue(stack.getContext().get(ServletActionContext.PAGE_CONTEXT)instanceof PageContext);
        assertTrue(result.isExecuted());
    }

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        tag.setExecuteResult(false);


        tag.doStartTag();


        // tag clear components on doEndTag, so we need to get it here
        ActionComponent component = (ActionComponent) tag.getComponent();


        tag.doEndTag();


        TestActionTagResult result = (TestActionTagResult) component.getProxy().getInvocation().getResult();


        assertTrue(stack.getContext().containsKey(ServletActionContext.PAGE_CONTEXT));
        assertTrue(stack.getContext().get(ServletActionContext.PAGE_CONTEXT)instanceof PageContext);
        assertNull(result); // result is never executed, hence never set into invocation
    }

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        ActionContext.getContext().getParameters().put("user", "Santa Claus");


        tag.doStartTag();


        // tag clear components on doEndTag, so we need to get it here
        ActionComponent component = (ActionComponent) tag.getComponent();


        tag.doEndTag();


        // check parameters, there should be one
        ActionInvocation ai = component.getProxy().getInvocation();
        ActionContext ac = ai.getInvocationContext();
        assertEquals(1, ac.getParameters().size());
    }

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        ActionContext.getContext().getParameters().put("user", "Santa Claus");


        tag.doStartTag();


        // tag clear components on doEndTag, so we need to get it here
        ActionComponent component = (ActionComponent) tag.getComponent();


        tag.doEndTag();


        // check parameters, there should be one
        ActionInvocation ai = component.getProxy().getInvocation();
        ActionContext ac = ai.getInvocationContext();
        assertEquals(0, ac.getParameters().size());
    }

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    protected String namespace;
    protected boolean executeResult;
    protected boolean ignoreContextParams;


    public Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res) {
        return new ActionComponent(stack, req, res);
    }

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        tag.setExecuteResult(true);


        tag.doStartTag();


        // tag clear components on doEndTag
        ActionComponent component = (ActionComponent) tag.getComponent();


        tag.doEndTag();


        TestActionTagResult result = (TestActionTagResult) component.getProxy().getInvocation().getResult();


        assertTrue(stack.getContext().containsKey(ServletActionContext.PAGE_CONTEXT));
        assertTrue(stack.getContext().get(ServletActionContext.PAGE_CONTEXT)instanceof PageContext);
        assertTrue(result.isExecuted());
    }

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    }


    protected void populateParams() {
        super.populateParams();


        ActionComponent action = (ActionComponent) component;
        action.setName(name);
        action.setNamespace(namespace);
        action.setExecuteResult(executeResult);
        action.setIgnoreContextParams(ignoreContextParams);
        action.start(pageContext.getOut());
    }

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        action.setIgnoreContextParams(ignoreContextParams);
        action.start(pageContext.getOut());
    }


    protected void addParameter(String name, Object value) {
        ActionComponent ac = (ActionComponent) component;
        ac.addParameter(name, value);
    }

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    protected boolean executeResult;
    protected boolean ignoreContextParams;
    protected boolean flush = true;


    public Component getBean(ValueStack stack, HttpServletRequest req, HttpServletResponse res) {
        return new ActionComponent(stack, req, res);
    }

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