private OffsetCommand convert2OffsetCommand(final String topic, final int partition, final String group,
            final long offset) {
        return new OffsetCommand(topic, group, partition, offset, 0);
    }
Use Jetty as http server and handle request of get message/put message/get
offset
metamorphosis-server-wrapper/src/main/java/com/taobao/metamorphosis/http/processor/MetamorphosisOnJettyProcessor.java