# ThrottleContextFactory.java

    /*
    * Copyright 2004,2005 The Apache Software Foundation.
    *
    * 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.apache.synapse.commons.throttle.core.factory;

    import org.apache.synapse.commons.throttle.core.*;
    import org.apache.synapse.commons.throttle.core.impl.domainbase.DomainBaseThrottleContext;
    import org.apache.synapse.commons.throttle.core.impl.ipbase.IPBaseThrottleContext;
    import org.apache.synapse.commons.throttle.core.impl.rolebase.RoleBaseThrottleContext;
    import org.apache.synapse.commons.throttle.core.internal.ThrottleServiceDataHolder;

    /**
     * Factory for creating a ThrottleContext - holds all callers runtime data - the current state
     */

    public class ThrottleContextFactory {

        // Task for replicating CallerContexts.
        private static final ThrottleReplicator throttleReplicator = new ThrottleReplicator();
        private static final ThrottleWindowReplicator throttleWindowReplicator = new ThrottleWindowReplicator();
        private static final ThrottleContextCleanupTask throttleContextCleanupTask = new ThrottleContextCleanupTask();
        /**
         * To create a ThrottleContext for the given throttle type
         * Needs to provide a throttle configuration
         *
         * @param throttletype  - The type of the throttle
         * @param configuration - The throttle configuration
         * @return ThrottleContext - The corresponding ThrottleContext for the given throttle type
         * @throws ThrottleException - Throws for if the throttle type is unknown
         */
        public static ThrottleContext createThrottleContext(int throttletype,
                                                            ThrottleConfiguration configuration)
                throws ThrottleException {
            if (ThrottleConstants.IP_BASE == throttletype) {
                return new IPBaseThrottleContext(configuration, throttleReplicator);
            } else if (ThrottleConstants.DOMAIN_BASE == throttletype) {
                return new DomainBaseThrottleContext(configuration, throttleReplicator);
            } else if (ThrottleConstants.ROLE_BASE == throttletype) {
                return new RoleBaseThrottleContext(configuration, throttleReplicator);
            } else {
                throw new ThrottleException("Unknown throttle type");
            }
        }

        /**
         * Ger throttle window replicator instance to make sure that there will be one throttle replicator in the implementation
         *
         * @return ThrottleWindowReplicator instance
         */
        public static ThrottleWindowReplicator getThrottleWindowReplicatorInstance() {
            return throttleWindowReplicator;
        }

        /**
         * Get throttle caller context cleanup task instance
         * implementation
         *
         * @return ThrottleWindowReplicator instance
         */
        public static ThrottleContextCleanupTask getThrottleContextCleanupTaskInstance() {
            return throttleContextCleanupTask;
        }
    }