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Securing your RESTful services

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/**
 * Copyright 2015-2017 Red Hat, Inc, and individual contributors.
 *
 * 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.wildfly.swarm.keycloak.deployment;

import io.undertow.server.HttpServerExchange;
import io.undertow.servlet.api.ThreadSetupHandler;
import org.keycloak.KeycloakSecurityContext;
import org.keycloak.adapters.undertow.OIDCUndertowHttpFacade;

/**
 * @author Bob McWhirter
 */
class KeycloakThreadSetupHandler implements ThreadSetupHandler {
    @Override
    public  Action create(final Action action) {

        return new Action() {

            @Override
            public T call(HttpServerExchange exchange, C context) throws Exception {
                if (exchange == null) {
                    return null;
                }
                KeycloakSecurityContext c = exchange.getAttachment(OIDCUndertowHttpFacade.KEYCLOAK_SECURITY_CONTEXT_KEY);
                KeycloakSecurityContextAssociation.associate(c);
                try {
                    return action.call(exchange, context);
                } finally {
                    KeycloakSecurityContextAssociation.disassociate();
                }
            }
        };
    }

}