# Emulator.java

    /*
     * Copyright (c) 2019, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
     *
     * WSO2 Inc. 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.synapse.commons.emulator.core;

    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.apache.synapse.commons.emulator.http.HTTPProtocolEmulator;

    public class Emulator extends Thread {
        private static final Log log = LogFactory.getLog(Emulator.class);
        private HTTPProtocolEmulator httpProtocolEmulator;
        private EmulatorType emulatorType;

        /**
         * Constructor of the class.
         */
        public Emulator() {
            httpProtocolEmulator = new HTTPProtocolEmulator(this);
        }

        /**
         * Get the HTTPProtocolEmulator object.
         *
         * @return object of HTTPProtocolEmulator
         */
        public HTTPProtocolEmulator getHttpProtocolEmulator() {
            return httpProtocolEmulator;
        }

        public void run() {

            try {
                if (EmulatorType.HTTP_CONSUMER.equals(emulatorType)) {
                    validateInput(httpProtocolEmulator.getConsumerContext());
                    httpProtocolEmulator.getHttpEmulatorConsumerInitializer().initialize();
                } else if (EmulatorType.HTTP_PRODUCER.equals(emulatorType)) {
                    validateInput(httpProtocolEmulator.getHttpProducerContext());
                    httpProtocolEmulator.getHttpEmulatorProducerInitializer().initialize();
                }
            } catch (Exception e) {
                log.error("Exception occurred while initialize the Emulator", e);
            }
        }

        public void shutdown(EmulatorType emulatorType) {
            if (EmulatorType.HTTP_CONSUMER.equals(emulatorType)) {
                httpProtocolEmulator.getHttpEmulatorConsumerInitializer().shutdown();
            } else if (EmulatorType.HTTP_PRODUCER.equals(emulatorType)) {
                httpProtocolEmulator.getHttpEmulatorProducerInitializer().shutdown();
            }
            log.info("Emulator shutdown successfully.......");
        }

        private void validateInput(AbstractEmulatorContext abstractEmulatorContext) {
            if (abstractEmulatorContext.getHost() == null || abstractEmulatorContext.getPort() == null) {
               log.error("Invalid host [" + abstractEmulatorContext.getHost() + "] and port [" + abstractEmulatorContext
                       .getPort() + "]");
            }
        }

        void setEmulatorType(EmulatorType emulatorType) {
            this.emulatorType = emulatorType;
        }
    }