Liferay 启动过程分析14-初始化resource code

 在MainServlet中，当初始化resource actions之后，就开始初始化resource code ,这是由以下代码来完成的：

if (_log.isDebugEnabled()) {
            _log.debug("Initialize resource codes");
        }

        try {
            initResourceCodes(portlets);
        }
..

 

它会去调用initResourceCodes方法：

protected void initResourceCodes(List<Portlet> portlets) throws Exception {
        long[] companyIds = PortalInstances.getCompanyIdsBySQL();

        Iterator<Portlet> itr = portlets.iterator();

        while (itr.hasNext()) {
            Portlet portlet = itr.next();

            List<String> modelNames =
                ResourceActionsUtil.getPortletModelResources(
                    portlet.getPortletId());

            for (long companyId : companyIds) {
                ResourceCodeLocalServiceUtil.checkResourceCodes(
                    companyId, portlet.getPortletId());

                for (String modelName : modelNames) {
                    ResourceCodeLocalServiceUtil.checkResourceCodes(
                        companyId, modelName);
                }
            }
        }
    }

 

我们逐行分析：

 

02行：

02行会发起一个数据库的查询，来获取Liferay实例对应的数据库中存放的所有company的id,这个方法在PortalInstances类中：

private long[] _getCompanyIdsBySQL() throws SQLException {
        List<Long> companyIds = new ArrayList<Long>();

        ...
        try {
            con = DataAccess.getConnection();

            ps = con.prepareStatement(_GET_COMPANY_IDS);

            rs = ps.executeQuery();

            while (rs.next()) {
                long companyId = rs.getLong("companyId");

                companyIds.add(companyId);
            }
        }
        finally {
            DataAccess.cleanUp(con, ps, rs);
        }

        return ArrayUtil.toArray(
            companyIds.toArray(new Long[companyIds.size()]));
    }

 

04-06行会迭代所有的portlet,对于每一个portlet:

 

09-11行：

09-11行会根据这个portlet的id来获取这个portlet的model的名字列表,它会调用ResourceActionUtil类的getPortletModelResources方法：

public static List<String> getPortletModelResources(String portletName) {
    return getResourceActions().getPortletModelResources(portletName);
}

进而最终调用ResourceActionsImpl的getPortletModelResources方法：

public List<String> getPortletModelResources(String portletName) {
        portletName = PortletConstants.getRootPortletId(portletName);

        Set<String> resources = _portletModelResources.get(portletName);

        if (resources == null) {
            return new UniqueList<String>();
        }
        else {
            return Collections.list(Collections.enumeration(resources));
        }
    }

从这里我们可以看出，它是从_portletModelResources中获取与portletName对应的Model名字列表，怎么获得呢，见readModelResource方法：

protected void readModelResource(
        String servletContextName, Element modelResourceElement) {

        String name = modelResourceElement.elementTextTrim("model-name");

        Element portletRefElement = modelResourceElement.element("portlet-ref");

        for (Element portletNameElement :
                portletRefElement.elements("portlet-name")) {

            String portletName = portletNameElement.getTextTrim();

            if (servletContextName != null) {
                portletName =
                    portletName.concat(PortletConstants.WAR_SEPARATOR).concat(
                        servletContextName);
            }

            portletName = portal.getJsSafePortletId(portletName);

            // Reference for a portlet to child models

            Set<String> modelResources = _portletModelResources.get(
                portletName);

            if (modelResources == null) {
                modelResources = new HashSet<String>();

                _portletModelResources.put(portletName, modelResources);
            }

            modelResources.add(name);

            // Reference for a model to parent portlets

            Set<String> portletResources = _modelPortletResources.get(name);

            if (portletResources == null) {
                portletResources = new HashSet<String>();

                _modelPortletResources.put(name, portletResources);
            }

            portletResources.add(portletName);
        }

        List<String> supportsActions = readSupportsActions(
            modelResourceElement, _modelResourceActions, name);

        checkModelActions(supportsActions);

        setActions(_modelResourceActions, name, supportsActions);

        readGroupDefaultActions(
            modelResourceElement, _modelResourceGroupDefaultActions, name);

        List<String> guestDefaultActions = readGuestDefaultActions(
            modelResourceElement, _modelResourceGuestDefaultActions, name);

        readGuestUnsupportedActions(
            modelResourceElement, _modelResourceGuestUnsupportedActions, name,
            guestDefaultActions);

        setActions(
            _modelResourceGuestDefaultActions, name, guestDefaultActions);

        readOwnerDefaultActions(
            modelResourceElement, _modelResourceOwnerDefaultActions, name);
    }

 

分析第13-15行：

它会遍历每一个companyId,然后调用ResourceCodeLocalServiceUtil的checkResourceCodes方法来检查Resouce codes：

public static void checkResourceCodes(long companyId, java.lang.String name)
        throws com.liferay.portal.kernel.exception.SystemException {
        getService().checkResourceCodes(companyId, name);
    }

它最终会委托ResouceCodeLocalServiceImpl的checkResourceCodes方法：

@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
    public void checkResourceCodes(long companyId, String name)
        throws SystemException {

        if (PropsValues.PERMISSIONS_USER_CHECK_ALGORITHM == 6) {
            return;
        }

        getResourceCode(companyId, name, ResourceConstants.SCOPE_COMPANY);
        getResourceCode(companyId, name, ResourceConstants.SCOPE_GROUP);
        getResourceCode(
            companyId, name, ResourceConstants.SCOPE_GROUP_TEMPLATE);
        getResourceCode(companyId, name, ResourceConstants.SCOPE_INDIVIDUAL);
    }

它先依然检查user check permission,然后对各个scope (company,group等），分别发起数据库查询(封装在如下的fetchByC_N_S方法中)来获取响应的ResourceCode:

public ResourceCode getResourceCode(long companyId, String name, int scope)
        throws SystemException {

        // Always cache the resource code. This table exists to improve
        // performance. Create the resource code if one does not exist.

        if (Validator.isNull(name)) {
            name = StringPool.BLANK;
        }

        String key = encodeKey(companyId, name, scope);

        ResourceCode resourceCode = _resourceCodes.get(key);

        if (resourceCode == null) {
            resourceCode = resourceCodePersistence.fetchByC_N_S(
                companyId, name, scope);

            if (resourceCode == null) {
                resourceCode = resourceCodeLocalService.addResourceCode(
                    companyId, name, scope);
            }

            _resourceCodes.put(key, resourceCode);
        }

        return resourceCode;
    }

 

17-19行，最终也是执行数据库查询，这里不再展开。