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mqtt初始优化

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lingyunxsh
2025-05-13 21:32:51 +08:00
parent 60abc68c60
commit 342284d12c
1 changed files with 16 additions and 17 deletions
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33
springboot-init-main/src/main/java/com/yupi/project/config/MqttConfig.java
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@@ -8,7 +8,6 @@ import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;
@@ -25,7 +24,7 @@ public class MqttConfig {
private final MqttProperties mqttProperties;
private final MqttCallbackHandler mqttCallbackHandler;
@Autowired // Autowire the MqttClient bean defined below
// No @Autowired here. This field will be set by the mqttClientBean() method.
private MqttClient mqttClient;
@Bean
@@ -37,55 +36,55 @@ public class MqttConfig {
if (StringUtils.hasText(mqttProperties.getPassword())) {
options.setPassword(mqttProperties.getPassword().toCharArray());
}
options.setAutomaticReconnect(true); // Enable automatic reconnect
options.setCleanSession(true); // Start with a clean session
options.setAutomaticReconnect(true);
options.setCleanSession(true);
options.setConnectionTimeout(mqttProperties.getConnectionTimeout());
options.setKeepAliveInterval(mqttProperties.getKeepAliveInterval());
// options.setWill(...) // Configure Last Will and Testament if needed
return options;
}
@Bean // Bean method name will be the bean name by default: "mqttClientBean"
@Bean
public MqttClient mqttClientBean(MqttConnectOptions mqttConnectOptions) throws MqttException {
String clientId = mqttProperties.getClientIdPrefix() + UUID.randomUUID().toString().replace("-", "");
// Create the client instance
MqttClient client = new MqttClient(mqttProperties.getBrokerUrl(), clientId, new MemoryPersistence());
client.setCallback(mqttCallbackHandler);
// Pass the client instance to the handler so it can subscribe on connectComplete
mqttCallbackHandler.setMqttClient(client);
return client;
mqttCallbackHandler.setMqttClient(client);
// Assign the created client to the instance field for @PostConstruct/@PreDestroy usage
this.mqttClient = client;
return client; // Return it to be managed by Spring as a bean
}
@PostConstruct
public void connect() {
try {
// Use the autowired mqttClient field
if (this.mqttClient != null && !this.mqttClient.isConnected()) {
log.info("Attempting to connect to MQTT broker: {} with client ID: {}", mqttProperties.getBrokerUrl(), this.mqttClient.getClientId());
this.mqttClient.connect(mqttConnectOptions()); // mqttConnectOptions() provides the bean
// Subscription logic is now in MqttCallbackHandler.connectComplete
// Pass the MqttConnectOptions bean directly to the connect method
this.mqttClient.connect(mqttConnectOptions());
} else if (this.mqttClient == null) {
log.error("MqttClient (autowired) is null, cannot connect.");
log.error("MqttClient instance is null (was not set by mqttClientBean), cannot connect.");
}
} catch (MqttException e) {
log.error("Error connecting to MQTT broker: ", e);
// Consider retry logic or application failure based on requirements
}
}
@PreDestroy
public void disconnect() {
try {
// Use the autowired mqttClient field
if (this.mqttClient != null && this.mqttClient.isConnected()) {
log.info("Disconnecting from MQTT broker: {}", this.mqttClient.getServerURI());
this.mqttClient.disconnect();
log.info("Successfully disconnected from MQTT broker.");
}
if (this.mqttClient != null) {
this.mqttClient.close();
// Ensure close is called even if disconnect fails or was not connected
this.mqttClient.close();
}
} catch (MqttException e) {
log.error("Error disconnecting from MQTT broker: ", e);
log.error("Error disconnecting/closing MQTT client: ", e);
}
}
}