1、异常定义
import org.eclipse.paho.client.mqttv3.internal.MessageCatalog;
public class MqttException extends Exception {
private static final long serialVersionUID = 300L;
public static final short REASON_CODE_CLIENT_EXCEPTION = 0;
public static final short REASON_CODE_INVALID_PROTOCOL_VERSION = 1;
public static final short REASON_CODE_INVALID_CLIENT_ID = 2;
public static final short REASON_CODE_BROKER_UNAVAILABLE = 3;
public static final short REASON_CODE_FAILED_AUTHENTICATION = 4;
public static final short REASON_CODE_NOT_AUTHORIZED = 5;
public static final short REASON_CODE_UNEXPECTED_ERROR = 6;
public static final short REASON_CODE_SUBSCRIBE_FAILED = 128;
public static final short REASON_CODE_CLIENT_TIMEOUT = 32000;
public static final short REASON_CODE_NO_MESSAGE_IDS_AVAILABLE = 32001;
public static final short REASON_CODE_WRITE_TIMEOUT = 32002;
public static final short REASON_CODE_CLIENT_CONNECTED = 32100;
public static final short REASON_CODE_CLIENT_ALREADY_DISCONNECTED = 32101;
public static final short REASON_CODE_CLIENT_DISCONNECTING = 32102;
public static final short REASON_CODE_SERVER_CONNECT_ERROR = 32103;
public static final short REASON_CODE_CLIENT_NOT_CONNECTED = 32104;
public static final short REASON_CODE_SOCKET_FACTORY_MISMATCH = 32105;
public static final short REASON_CODE_SSL_CONFIG_ERROR = 32106;
public static final short REASON_CODE_CLIENT_DISCONNECT_PROHIBITED = 32107;
public static final short REASON_CODE_INVALID_MESSAGE = 32108;
public static final short REASON_CODE_CONNECTION_LOST = 32109;
public static final short REASON_CODE_CONNECT_IN_PROGRESS = 32110;
public static final short REASON_CODE_CLIENT_CLOSED = 32111;
public static final short REASON_CODE_TOKEN_INUSE = 32201;
public static final short REASON_CODE_MAX_INFLIGHT = 32202;
public static final short REASON_CODE_DISCONNECTED_BUFFER_FULL = 32203;
private int reasonCode;
private Throwable cause;
public MqttException(int reasonCode) {
this.reasonCode = reasonCode;
}
public MqttException(Throwable cause) {
this.reasonCode = 0;
this.cause = cause;
}
public MqttException(int reason, Throwable cause) {
this.reasonCode = reason;
this.cause = cause;
}
public int getReasonCode() {
return this.reasonCode;
}
public Throwable getCause() {
return this.cause;
}
public String getMessage() {
return MessageCatalog.getMessage(this.reasonCode);
}
public String toString() {
String result = this.getMessage() + " (" + this.reasonCode + ")";
if (this.cause != null) {
result = result + " - " + this.cause.toString();
}
return result;
}
}
2、定义异常helper
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttSecurityException;
public class ExceptionHelper {
public static MqttException createMqttException(int reasonCode) {
return (MqttException)(reasonCode != 4 && reasonCode != 5 ? new MqttException(reasonCode) : new MqttSecurityException(reasonCode));
}
public static MqttException createMqttException(Throwable cause) {
return (MqttException)(cause.getClass().getName().equals("java.security.GeneralSecurityException") ? new MqttSecurityException(cause) : new MqttException(cause));
}
public static boolean isClassAvailable(String className) {
boolean result = false;
try {
Class.forName(className);
result = true;
} catch (ClassNotFoundException var3) {
}
return result;
}
private ExceptionHelper() {
}
}
3、继承异常Helper的子类
public class MqttSecurityException extends MqttException {
private static final long serialVersionUID = 300L;
public MqttSecurityException(int reasonCode) {
super(reasonCode);
}
public MqttSecurityException(Throwable cause) {
super(cause);
}
public MqttSecurityException(int reasonCode, Throwable cause) {
super(reasonCode, cause);
}
}