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Add sample proxy for mop Signed-off-by: xiaolong.ran <[email protected]>
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35 changes: 35 additions & 0 deletions
35
mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/LookupHandler.java
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|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| /** | ||
| * 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 io.streamnative.pulsar.handlers.mqtt.proxy; | ||
|
|
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| import java.util.concurrent.CompletableFuture; | ||
| import org.apache.commons.lang3.tuple.Pair; | ||
| import org.apache.pulsar.common.naming.TopicName; | ||
|
|
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| /** | ||
| * Lookup handler. | ||
| */ | ||
| public interface LookupHandler { | ||
|
|
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| /** | ||
| * Find broker for protocolHandler. | ||
| * | ||
| * @param topicName namespaceName | ||
| * @param protocolHandlerName protocolHandler name | ||
| * @return Pair consist of brokerHost and brokerPort | ||
| */ | ||
| CompletableFuture<Pair<String, Integer>> findBroker(TopicName topicName, | ||
| String protocolHandlerName) throws Exception; | ||
|
|
||
| } |
76 changes: 76 additions & 0 deletions
76
mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/ProxyConfiguration.java
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| /** | ||
| * 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 io.streamnative.pulsar.handlers.mqtt.proxy; | ||
|
|
||
| import lombok.Getter; | ||
| import lombok.Setter; | ||
| import org.apache.pulsar.common.configuration.Category; | ||
| import org.apache.pulsar.common.configuration.FieldContext; | ||
|
|
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| /** | ||
| * Configuration for MQTT proxy service. | ||
| */ | ||
| @Getter | ||
| @Setter | ||
| public class ProxyConfiguration { | ||
|
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| @Category | ||
| private static final String CATEGORY_MQTT = "MQTT on Pulsar"; | ||
| @Category | ||
| private static final String CATEGORY_MQTT_PROXY = "MQTT Proxy"; | ||
| @Category | ||
| private static final String CATEGORY_BROKER_DISCOVERY = "Broker Discovery"; | ||
|
|
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| @FieldContext( | ||
| category = CATEGORY_MQTT, | ||
| required = true, | ||
| doc = "Mqtt on Pulsar Broker tenant" | ||
| ) | ||
| private String mqttTenant = "public"; | ||
|
|
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| @FieldContext( | ||
| category = CATEGORY_MQTT, | ||
| required = true, | ||
| doc = "The maximum number of channels which can exist concurrently on a connection." | ||
| ) | ||
| private int mqttMaxNoOfChannels = 64; | ||
|
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| @FieldContext( | ||
| category = CATEGORY_MQTT, | ||
| required = true, | ||
| doc = "The maximum frame size on a connection." | ||
| ) | ||
| private int mqttMaxFrameSize = 4 * 1024 * 1024; | ||
|
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| @FieldContext( | ||
| category = CATEGORY_MQTT, | ||
| required = true, | ||
| doc = "The default heartbeat timeout on broker" | ||
| ) | ||
| private int mqttHeartBeat = 60 * 1000; | ||
|
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| @FieldContext( | ||
| category = CATEGORY_MQTT_PROXY, | ||
| required = false, | ||
| doc = "The mqtt proxy port" | ||
| ) | ||
| private int mqttProxyPort = 5682; | ||
|
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| @FieldContext( | ||
| category = CATEGORY_BROKER_DISCOVERY, | ||
| doc = "The service url points to the broker cluster" | ||
| ) | ||
| private String brokerServiceURL; | ||
|
|
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| } |
166 changes: 166 additions & 0 deletions
166
mqtt-impl/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/ProxyConnection.java
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| /** | ||
| * 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 io.streamnative.pulsar.handlers.mqtt.proxy; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkState; | ||
| import static io.netty.handler.codec.mqtt.MqttQoS.AT_MOST_ONCE; | ||
|
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| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.channel.ChannelInboundHandlerAdapter; | ||
| import io.netty.handler.codec.mqtt.MqttConnectMessage; | ||
| import io.netty.handler.codec.mqtt.MqttFixedHeader; | ||
| import io.netty.handler.codec.mqtt.MqttMessage; | ||
| import io.netty.handler.codec.mqtt.MqttMessageType; | ||
| import io.netty.handler.codec.mqtt.MqttPubAckMessage; | ||
| import io.netty.handler.codec.mqtt.MqttPublishMessage; | ||
| import io.netty.handler.codec.mqtt.MqttSubscribeMessage; | ||
| import io.netty.handler.codec.mqtt.MqttUnsubscribeMessage; | ||
| import io.streamnative.pulsar.handlers.mqtt.ProtocolMethodProcessor; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import lombok.Getter; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.pulsar.client.api.PulsarClientException; | ||
|
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| /** | ||
| * Proxy connection. | ||
| */ | ||
| @Slf4j | ||
| public class ProxyConnection extends ChannelInboundHandlerAdapter{ | ||
| private final ProtocolMethodProcessor processor; | ||
| private ProxyService proxyService; | ||
| private ProxyConfiguration proxyConfig; | ||
| @Getter | ||
| private ChannelHandlerContext cnx; | ||
| private State state; | ||
| private ProxyHandler proxyHandler; | ||
|
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| private LookupHandler lookupHandler; | ||
|
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| private List<Object> connectMsgList = new ArrayList<>(); | ||
|
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| private enum State { | ||
| Init, | ||
| RedirectLookup, | ||
| RedirectToBroker, | ||
| Closed | ||
| } | ||
|
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| public ProxyConnection(ProxyService proxyService) throws PulsarClientException { | ||
| log.info("ProxyConnection init ..."); | ||
| this.proxyService = proxyService; | ||
| this.proxyConfig = proxyService.getProxyConfig(); | ||
| lookupHandler = proxyService.getLookupHandler(); | ||
| processor = new ProxyInboundHandler(proxyService, this); | ||
| state = State.Init; | ||
| } | ||
|
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| @Override | ||
| public void channelActive(ChannelHandlerContext cnx) throws Exception { | ||
| super.channelActive(cnx); | ||
| this.cnx = cnx; | ||
| } | ||
|
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| @Override | ||
| public void channelInactive(ChannelHandlerContext ctx) throws Exception { | ||
| super.channelInactive(ctx); | ||
| this.close(); | ||
| } | ||
|
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|
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| @Override | ||
| public void channelRead(ChannelHandlerContext ctx, Object message) throws Exception { | ||
| MqttMessage msg = (MqttMessage) message; | ||
| MqttMessageType messageType = msg.fixedHeader().messageType(); | ||
|
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| if (log.isDebugEnabled()) { | ||
| log.info("Processing MQTT message, type={}", messageType); | ||
| } | ||
| try { | ||
| switch (messageType) { | ||
| case CONNECT: | ||
| checkState(msg instanceof MqttConnectMessage); | ||
| processor.processConnect(ctx.channel(), (MqttConnectMessage) msg); | ||
| break; | ||
| case SUBSCRIBE: | ||
| checkState(msg instanceof MqttSubscribeMessage); | ||
| processor.processSubscribe(ctx.channel(), (MqttSubscribeMessage) msg); | ||
| break; | ||
| case UNSUBSCRIBE: | ||
| checkState(msg instanceof MqttUnsubscribeMessage); | ||
| processor.processUnSubscribe(ctx.channel(), (MqttUnsubscribeMessage) msg); | ||
| break; | ||
| case PUBLISH: | ||
| checkState(msg instanceof MqttPublishMessage); | ||
| processor.processPublish(ctx.channel(), (MqttPublishMessage) msg); | ||
| break; | ||
| case PUBREC: | ||
| processor.processPubRec(ctx.channel(), msg); | ||
| break; | ||
| case PUBCOMP: | ||
| processor.processPubComp(ctx.channel(), msg); | ||
| break; | ||
| case PUBREL: | ||
| processor.processPubRel(ctx.channel(), msg); | ||
| break; | ||
| case DISCONNECT: | ||
| processor.processDisconnect(ctx.channel()); | ||
| break; | ||
| case PUBACK: | ||
| checkState(msg instanceof MqttPubAckMessage); | ||
| processor.processPubAck(ctx.channel(), (MqttPubAckMessage) msg); | ||
| break; | ||
| case PINGREQ: | ||
| MqttFixedHeader pingHeader = new MqttFixedHeader( | ||
| MqttMessageType.PINGRESP, | ||
| false, | ||
| AT_MOST_ONCE, | ||
| false, | ||
| 0); | ||
| MqttMessage pingResp = new MqttMessage(pingHeader); | ||
| ctx.writeAndFlush(pingResp); | ||
| break; | ||
| default: | ||
| log.error("Unkonwn MessageType:{}", messageType); | ||
| break; | ||
| } | ||
| } catch (Throwable ex) { | ||
| log.error("Exception was caught while processing MQTT message, " + ex.getCause(), ex); | ||
| ctx.fireExceptionCaught(ex); | ||
| ctx.close(); | ||
| } | ||
| } | ||
|
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| public void resetProxyHandler() { | ||
| if (proxyHandler != null) { | ||
| proxyHandler.close(); | ||
| proxyHandler = null; | ||
| } | ||
| } | ||
|
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| public void close() { | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("ProxyConnection close."); | ||
| } | ||
|
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| if (proxyHandler != null) { | ||
| resetProxyHandler(); | ||
| } | ||
| if (cnx != null) { | ||
| cnx.close(); | ||
| } | ||
| state = State.Closed; | ||
| } | ||
|
|
||
| } |
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