package com.dji.sample.component.mqtt.handler;
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import com.dji.sample.component.mqtt.model.ChannelName;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.integration.annotation.Router;
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import org.springframework.integration.mqtt.support.MqttHeaders;
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import org.springframework.integration.router.AbstractMessageRouter;
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import org.springframework.messaging.Message;
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import org.springframework.messaging.MessageChannel;
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import org.springframework.messaging.MessageHeaders;
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import org.springframework.stereotype.Component;
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import javax.annotation.Resource;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.regex.Pattern;
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import static com.dji.sample.component.mqtt.model.TopicConst.*;
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/**
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*
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* @author sean.zhou
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* @date 2021/11/10
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* @version 0.1
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*/
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@Component
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@Slf4j
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public class InboundMessageRouter extends AbstractMessageRouter {
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@Resource(name = ChannelName.INBOUND)
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private MessageChannel inboundChannel;
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@Resource(name = ChannelName.INBOUND_STATUS)
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private MessageChannel statusChannel;
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@Resource(name = ChannelName.INBOUND_STATE)
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private MessageChannel stateChannel;
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@Resource(name = ChannelName.DEFAULT)
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private MessageChannel defaultChannel;
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@Resource(name = ChannelName.INBOUND_SERVICE_REPLY)
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private MessageChannel serviceReplyChannel;
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@Resource(name = ChannelName.INBOUND_OSD)
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private MessageChannel osdChannel;
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@Resource(name = ChannelName.INBOUND_REQUESTS)
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private MessageChannel requestsChannel;
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@Resource(name = ChannelName.INBOUND_EVENTS)
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private MessageChannel eventsChannel;
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private static final Pattern PATTERN_TOPIC_STATUS =
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Pattern.compile("^" + BASIC_PRE + PRODUCT + REGEX_SN + STATUS_SUF + "$");
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private static final Pattern PATTERN_TOPIC_STATE =
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Pattern.compile("^" + THING_MODEL_PRE + PRODUCT + REGEX_SN + STATE_SUF + "$");
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private static final Pattern PATTERN_TOPIC_SERVICE_REPLY =
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Pattern.compile("^" + THING_MODEL_PRE + PRODUCT + REGEX_SN + SERVICES_SUF + _REPLY_SUF + "$");
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private static final Pattern PATTERN_TOPIC_OSD =
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Pattern.compile("^" + THING_MODEL_PRE + PRODUCT + REGEX_SN + OSD_SUF + "$");
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private static final Pattern PATTERN_TOPIC_REQUESTS =
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Pattern.compile("^" + THING_MODEL_PRE + PRODUCT + REGEX_SN + REQUESTS_SUF + "$");
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private static final Pattern PATTERN_TOPIC_EVENTS =
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Pattern.compile("^" + THING_MODEL_PRE + PRODUCT + REGEX_SN + EVENTS_SUF + "$");
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/**
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* All mqtt broker messages will arrive here before distributing them to different channels.
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* @param message message from mqtt broker
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* @return channel
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*/
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@Override
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@Router(inputChannel = ChannelName.INBOUND)
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protected Collection<MessageChannel> determineTargetChannels(Message<?> message) {
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MessageHeaders headers = message.getHeaders();
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String topic = headers.get(MqttHeaders.RECEIVED_TOPIC).toString();
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byte[] payload = (byte[])message.getPayload();
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// osd
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if (PATTERN_TOPIC_OSD.matcher(topic).matches()) {
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return Collections.singleton(osdChannel);
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}
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log.debug("received topic :{} \t payload :{}", topic, new String(payload));
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// status
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if (PATTERN_TOPIC_STATUS.matcher(topic).matches()) {
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return Collections.singleton(statusChannel);
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}
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// state
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if (PATTERN_TOPIC_STATE.matcher(topic).matches()) {
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return Collections.singleton(stateChannel);
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}
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// services_reply
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if (PATTERN_TOPIC_SERVICE_REPLY.matcher(topic).matches()) {
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return Collections.singleton(serviceReplyChannel);
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}
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// requests
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if (PATTERN_TOPIC_REQUESTS.matcher(topic).matches()) {
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return Collections.singleton(requestsChannel);
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}
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// events
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if (PATTERN_TOPIC_EVENTS.matcher(topic).matches()) {
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return Collections.singleton(eventsChannel);
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}
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return Collections.singleton(defaultChannel);
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}
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}
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