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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.activemq.shiro;

import org.apache.activemq.security.SecurityContext;
import org.apache.activemq.shiro.subject.SubjectConnectionReference;
import org.apache.shiro.subject.Subject;

/**
 * A {@code SecurityContextFactory} returns a {@link SecurityContext} instance that retains a client
 * connection's {@link Subject} instance.
 * 
 * It should be noted that at the time a {@code SecurityContextFactory} is invoked, a {@link Subject} is already
 * associated with the client connection.  A {@code SecurityContextFactory} is merely responsible for creating
 * a Shiro-specific {@link org.apache.activemq.security.SecurityContext SecurityContext} instance.
 * 

 * The returned {@code SecurityContext} instance will then be made available to any downstream Broker Filters via
 * {@code connectionContext.}{@link org.apache.activemq.broker.ConnectionContext#getSecurityContext() getSecurityContext()}
 * to ensure it may be used for Shiro-based security checks.
 *
 * @see org.apache.activemq.shiro.subject.SubjectSecurityContext
 * @since 5.10.0
 */
public interface SecurityContextFactory {

    /**
     * Creates a new {@link SecurityContext} retaining the client connection's {@link Subject} instance.
     * 

     * It should be noted that at the time a {@code SecurityContextFactory} is invoked, a {@code Subject} is already
     * associated with the client connection.  A {@code SecurityContextFactory} is merely responsible for creating
     * a Shiro-specific {@link org.apache.activemq.security.SecurityContext SecurityContext} instance.
     * 
     * The returned {@code SecurityContext} instance will then be made available to any downstream Broker Filters via
     * {@code connectionContext.}{@link org.apache.activemq.broker.ConnectionContext#getSecurityContext() getSecurityContext()}
     * to ensure it may be used for Shiro-based security checks.
     *
     * @param ref the client's connection and subject
     * @return a new {@link SecurityContext} retaining the client connection's {@link Subject} instance.
     * @see org.apache.activemq.shiro.subject.SubjectSecurityContext
     */
    SecurityContext createSecurityContext(SubjectConnectionReference ref);
}