/*
 * Copyright (c) 2020, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.wso2.carbon.identity.core.filter;

import org.wso2.carbon.context.PrivilegedCarbonContext;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import static org.wso2.carbon.utils.multitenancy.MultitenantConstants.SUPER_TENANT_ID;

/**
 * Once registered to a web app, this servlet filter will initiate a super tenant flow when accessing the web app.
 *
 * Used to pass the session validation when accessing super tenant web app jsp files through a tenant's context
 * eg: /t/{tenant-domain}/.
 */
public class SuperTenantFlowInitializer implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

        // Nothing to implement
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {

        try {
            PrivilegedCarbonContext.startTenantFlow();
            PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantId(SUPER_TENANT_ID, true);

            filterChain.doFilter(servletRequest, servletResponse);
        } finally {
            PrivilegedCarbonContext.endTenantFlow();
        }
    }

    @Override
    public void destroy() {

        // Nothing to implement
    }
}

Add SuperTenantFlowInitializer filter