12.3.2.2. Uso das Permissões do Método EJB

Visão Geral

O elemento <method-permission> define as funções lógicas que são permitidas para acesso ao método EJB definido pelos elementos <method>. Diversas amostras demonstram a sintaxe do XML. As declarações de permissão do método podem estar presentes e elas possuem efeito cumulativo. O elemento <method-permission> é um filho do elemento <assembly-descriptor> do descritor <ejb-jar>.

A sintaxe XML é uma alternativa usando anotações para as permissões do método EJB.

Exemplo 12.5. Permite que funções acessem todos os métodos de um EJB

<method-permission>
  <description>The employee and temp-employee roles may access any method
  of the EmployeeService bean </description>
  <role-name>employee</role-name>
  <role-name>temp-employee</role-name>
  <method>
    <ejb-name>EmployeeService</ejb-name>
    <method-name>*</method-name>
  </method>
</method-permission>
	

Exemplo 12.6. Permite que funções acessem apenas métodos especificados de um EJB e limitam os parâmetros de método que precisam ser passados.

<method-permission>
  <description>The employee role may access the findByPrimaryKey,
  getEmployeeInfo, and the updateEmployeeInfo(String) method of
  the AcmekPayroll bean </description>
  <role-name>employee</role-name>
  <method>
	<ejb-name>AcmekPayroll</ejb-name>
	<method-name>findByPrimaryKey</method-name>
  </method>
  <method>
	<ejb-name>AcmePayroll</ejb-name>
	<method-name>getEmployeeInfo</method-name>
  </method>
  <method>
	<ejb-name>AcmePayroll</ejb-name>
	<method-name>updateEmployeeInfo</method-name>
	<method-params>
	  <method-param>java.lang.String</method-param>
	</method-params>
  </method>
</method-permission>

Exemplo 12.7. Permite que qualquer usuário autenticado acesse os métodos do EJBs

O uso do elemento <unchecked/> permite que qualquer usuário autenticado use os métodos especificados.
<method-permission>
  <description>Any authenticated user may access any method of the
  EmployeeServiceHelp bean</description>
  <unchecked/>
  <method>
	<ejb-name>EmployeeServiceHelp</ejb-name>
	<method-name>*</method-name>
  </method>
</method-permission>

Exemplo 12.8. Exclui completamente os métodos EJB específicos de serem utilizados

<exclude-list>
  <description>No fireTheCTO methods of the EmployeeFiring bean may be
  used in this deployment</description>
  <method>
	<ejb-name>EmployeeFiring</ejb-name>
	<method-name>fireTheCTO</method-name>
  </method>
</exclude-list>

Exemplo 12.9. Um <assembly-descriptor> completo contendo diversos blocos <method-permission>

<ejb-jar>
    <assembly-descriptor>
        <method-permission>
            <description>The employee and temp-employee roles may access any
                method of the EmployeeService bean </description>
            <role-name>employee</role-name>
            <role-name>temp-employee</role-name>
            <method>
                <ejb-name>EmployeeService</ejb-name>
                <method-name>*</method-name>
            </method>
        </method-permission>
        <method-permission>
            <description>The employee role may access the findByPrimaryKey,
                getEmployeeInfo, and the updateEmployeeInfo(String) method of
                the AcmePayroll bean </description>
            <role-name>employee</role-name>
            <method>
                <ejb-name>AcmePayroll</ejb-name>
                <method-name>findByPrimaryKey</method-name>
            </method>
            <method>
                <ejb-name>AcmePayroll</ejb-name>
                <method-name>getEmployeeInfo</method-name>
            </method>
            <method>
                <ejb-name>AcmePayroll</ejb-name>
                <method-name>updateEmployeeInfo</method-name>
                <method-params>
                    <method-param>java.lang.String</method-param>
                </method-params>
            </method>
        </method-permission>
        <method-permission>
            <description>The admin role may access any method of the
                EmployeeServiceAdmin bean </description>
            <role-name>admin</role-name>
            <method>
                <ejb-name>EmployeeServiceAdmin</ejb-name>
                <method-name>*</method-name>
            </method>
        </method-permission>
        <method-permission>
            <description>Any authenticated user may access any method of the
                EmployeeServiceHelp bean</description>
            <unchecked/>
            <method>
                <ejb-name>EmployeeServiceHelp</ejb-name>
                <method-name>*</method-name>
            </method>
        </method-permission>
        <exclude-list>
            <description>No fireTheCTO methods of the EmployeeFiring bean may be
                used in this deployment</description>
            <method>
                <ejb-name>EmployeeFiring</ejb-name>
                <method-name>fireTheCTO</method-name>
            </method>
        </exclude-list>
    </assembly-descriptor>
</ejb-jar>